./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.13.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9acd62b-0833-4c83-9481-13ff3c00e5f5/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9acd62b-0833-4c83-9481-13ff3c00e5f5/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_e9acd62b-0833-4c83-9481-13ff3c00e5f5/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9acd62b-0833-4c83-9481-13ff3c00e5f5/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.13.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9acd62b-0833-4c83-9481-13ff3c00e5f5/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_e9acd62b-0833-4c83-9481-13ff3c00e5f5/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 ce176716d91d866602a372020396224af9fcf4c5f81c6adcdcc0f1d83b0d658f --- 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 06:50:03,264 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 06:50:03,266 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 06:50:03,284 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 06:50:03,285 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 06:50:03,286 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 06:50:03,288 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 06:50:03,290 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 06:50:03,292 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 06:50:03,293 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 06:50:03,294 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 06:50:03,296 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 06:50:03,296 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 06:50:03,297 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 06:50:03,299 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 06:50:03,300 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 06:50:03,301 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 06:50:03,302 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 06:50:03,304 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 06:50:03,306 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 06:50:03,308 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 06:50:03,316 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 06:50:03,318 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 06:50:03,319 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 06:50:03,322 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 06:50:03,322 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 06:50:03,323 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 06:50:03,324 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 06:50:03,324 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 06:50:03,325 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 06:50:03,326 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 06:50:03,327 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 06:50:03,327 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 06:50:03,328 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 06:50:03,329 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 06:50:03,330 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 06:50:03,336 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 06:50:03,338 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 06:50:03,338 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 06:50:03,339 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 06:50:03,340 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 06:50:03,341 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9acd62b-0833-4c83-9481-13ff3c00e5f5/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 06:50:03,374 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 06:50:03,375 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 06:50:03,376 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 06:50:03,376 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 06:50:03,377 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 06:50:03,377 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 06:50:03,377 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 06:50:03,378 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 06:50:03,378 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 06:50:03,378 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 06:50:03,378 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 06:50:03,378 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 06:50:03,379 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 06:50:03,379 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 06:50:03,379 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 06:50:03,379 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 06:50:03,380 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 06:50:03,380 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 06:50:03,381 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 06:50:03,381 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 06:50:03,381 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 06:50:03,381 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 06:50:03,382 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 06:50:03,382 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 06:50:03,382 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 06:50:03,382 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 06:50:03,383 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 06:50:03,383 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 06:50:03,383 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 06:50:03,383 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 06:50:03,384 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 06:50:03,384 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 06:50:03,384 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:50:03,384 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 06:50:03,384 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 06:50:03,385 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 06:50:03,385 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 06:50:03,385 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 06:50:03,385 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 06:50:03,386 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 06:50:03,386 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 06:50:03,386 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9acd62b-0833-4c83-9481-13ff3c00e5f5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9acd62b-0833-4c83-9481-13ff3c00e5f5/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ce176716d91d866602a372020396224af9fcf4c5f81c6adcdcc0f1d83b0d658f [2022-11-19 06:50:03,718 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 06:50:03,754 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 06:50:03,757 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 06:50:03,758 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 06:50:03,759 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 06:50:03,760 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9acd62b-0833-4c83-9481-13ff3c00e5f5/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.13.cil-1.c [2022-11-19 06:50:03,834 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9acd62b-0833-4c83-9481-13ff3c00e5f5/bin/utaipan-I9t0OCRTmS/data/5d7888560/119ab94534364e76ab4f042e967afc6d/FLAGe9e40a47c [2022-11-19 06:50:04,480 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 06:50:04,481 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9acd62b-0833-4c83-9481-13ff3c00e5f5/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.13.cil-1.c [2022-11-19 06:50:04,511 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9acd62b-0833-4c83-9481-13ff3c00e5f5/bin/utaipan-I9t0OCRTmS/data/5d7888560/119ab94534364e76ab4f042e967afc6d/FLAGe9e40a47c [2022-11-19 06:50:04,739 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9acd62b-0833-4c83-9481-13ff3c00e5f5/bin/utaipan-I9t0OCRTmS/data/5d7888560/119ab94534364e76ab4f042e967afc6d [2022-11-19 06:50:04,742 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 06:50:04,744 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 06:50:04,745 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 06:50:04,746 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 06:50:04,749 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 06:50:04,750 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:50:04" (1/1) ... [2022-11-19 06:50:04,752 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7461630 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:50:04, skipping insertion in model container [2022-11-19 06:50:04,752 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:50:04" (1/1) ... [2022-11-19 06:50:04,760 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 06:50:04,832 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 06:50:05,032 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_e9acd62b-0833-4c83-9481-13ff3c00e5f5/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.13.cil-1.c[914,927] [2022-11-19 06:50:05,087 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_e9acd62b-0833-4c83-9481-13ff3c00e5f5/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.13.cil-1.c[7115,7128] [2022-11-19 06:50:05,227 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:50:05,237 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 06:50:05,258 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_e9acd62b-0833-4c83-9481-13ff3c00e5f5/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.13.cil-1.c[914,927] [2022-11-19 06:50:05,286 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_e9acd62b-0833-4c83-9481-13ff3c00e5f5/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.13.cil-1.c[7115,7128] [2022-11-19 06:50:05,372 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:50:05,410 INFO L208 MainTranslator]: Completed translation [2022-11-19 06:50:05,411 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:50:05 WrapperNode [2022-11-19 06:50:05,411 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 06:50:05,412 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 06:50:05,417 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 06:50:05,423 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 06:50:05,431 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:50:05" (1/1) ... [2022-11-19 06:50:05,446 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:50:05" (1/1) ... [2022-11-19 06:50:05,506 INFO L138 Inliner]: procedures = 79, calls = 97, calls flagged for inlining = 47, calls inlined = 47, statements flattened = 1103 [2022-11-19 06:50:05,507 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 06:50:05,508 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 06:50:05,508 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 06:50:05,508 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 06:50:05,518 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:50:05" (1/1) ... [2022-11-19 06:50:05,518 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:50:05" (1/1) ... [2022-11-19 06:50:05,523 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:50:05" (1/1) ... [2022-11-19 06:50:05,524 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:50:05" (1/1) ... [2022-11-19 06:50:05,540 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:50:05" (1/1) ... [2022-11-19 06:50:05,558 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:50:05" (1/1) ... [2022-11-19 06:50:05,562 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:50:05" (1/1) ... [2022-11-19 06:50:05,566 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:50:05" (1/1) ... [2022-11-19 06:50:05,572 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 06:50:05,573 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 06:50:05,573 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 06:50:05,573 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 06:50:05,574 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:50:05" (1/1) ... [2022-11-19 06:50:05,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:50:05,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9acd62b-0833-4c83-9481-13ff3c00e5f5/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:50:05,636 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9acd62b-0833-4c83-9481-13ff3c00e5f5/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 06:50:05,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9acd62b-0833-4c83-9481-13ff3c00e5f5/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 06:50:05,695 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 06:50:05,695 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-19 06:50:05,695 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-19 06:50:05,696 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2022-11-19 06:50:05,696 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2022-11-19 06:50:05,696 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-11-19 06:50:05,696 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-11-19 06:50:05,696 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-11-19 06:50:05,697 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-11-19 06:50:05,697 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2022-11-19 06:50:05,697 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2022-11-19 06:50:05,697 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-11-19 06:50:05,697 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-11-19 06:50:05,698 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-11-19 06:50:05,699 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-11-19 06:50:05,699 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2022-11-19 06:50:05,699 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2022-11-19 06:50:05,699 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2022-11-19 06:50:05,699 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2022-11-19 06:50:05,700 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2022-11-19 06:50:05,700 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2022-11-19 06:50:05,700 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-11-19 06:50:05,700 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-11-19 06:50:05,700 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 06:50:05,701 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-11-19 06:50:05,701 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-11-19 06:50:05,701 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2022-11-19 06:50:05,703 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2022-11-19 06:50:05,703 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 06:50:05,704 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 06:50:05,704 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-11-19 06:50:05,704 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-11-19 06:50:05,704 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2022-11-19 06:50:05,705 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2022-11-19 06:50:05,842 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 06:50:05,845 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 06:50:07,072 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 06:50:07,750 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 06:50:07,751 INFO L300 CfgBuilder]: Removed 20 assume(true) statements. [2022-11-19 06:50:07,757 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:50:07 BoogieIcfgContainer [2022-11-19 06:50:07,758 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 06:50:07,765 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 06:50:07,765 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 06:50:07,787 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 06:50:07,788 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 06:50:04" (1/3) ... [2022-11-19 06:50:07,790 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ab8efd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:50:07, skipping insertion in model container [2022-11-19 06:50:07,790 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:50:05" (2/3) ... [2022-11-19 06:50:07,791 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ab8efd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:50:07, skipping insertion in model container [2022-11-19 06:50:07,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:50:07" (3/3) ... [2022-11-19 06:50:07,795 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.13.cil-1.c [2022-11-19 06:50:07,819 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 06:50:07,820 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-19 06:50:07,924 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 06:50:07,944 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;@6dcfcc55, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 06:50:07,944 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-19 06:50:07,952 INFO L276 IsEmpty]: Start isEmpty. Operand has 277 states, 216 states have (on average 1.5509259259259258) internal successors, (335), 224 states have internal predecessors, (335), 43 states have call successors, (43), 15 states have call predecessors, (43), 15 states have return successors, (43), 41 states have call predecessors, (43), 43 states have call successors, (43) [2022-11-19 06:50:07,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-19 06:50:07,968 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:50:07,969 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:50:07,969 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:50:07,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:50:07,979 INFO L85 PathProgramCache]: Analyzing trace with hash 582250703, now seen corresponding path program 1 times [2022-11-19 06:50:07,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:50:07,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562992404] [2022-11-19 06:50:07,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:50:07,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:50:08,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:50:08,444 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 06:50:08,445 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:50:08,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562992404] [2022-11-19 06:50:08,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562992404] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:50:08,446 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:50:08,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 06:50:08,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291671098] [2022-11-19 06:50:08,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:50:08,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 06:50:08,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:50:08,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 06:50:08,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 06:50:08,509 INFO L87 Difference]: Start difference. First operand has 277 states, 216 states have (on average 1.5509259259259258) internal successors, (335), 224 states have internal predecessors, (335), 43 states have call successors, (43), 15 states have call predecessors, (43), 15 states have return successors, (43), 41 states have call predecessors, (43), 43 states have call successors, (43) Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-19 06:50:09,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:50:09,246 INFO L93 Difference]: Finished difference Result 604 states and 913 transitions. [2022-11-19 06:50:09,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 06:50:09,249 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2022-11-19 06:50:09,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:50:09,268 INFO L225 Difference]: With dead ends: 604 [2022-11-19 06:50:09,275 INFO L226 Difference]: Without dead ends: 331 [2022-11-19 06:50:09,283 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 06:50:09,288 INFO L413 NwaCegarLoop]: 395 mSDtfsCounter, 467 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 467 SdHoareTripleChecker+Valid, 688 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 06:50:09,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [467 Valid, 688 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 06:50:09,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2022-11-19 06:50:09,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 324. [2022-11-19 06:50:09,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 251 states have (on average 1.4661354581673307) internal successors, (368), 256 states have internal predecessors, (368), 51 states have call successors, (51), 22 states have call predecessors, (51), 20 states have return successors, (47), 47 states have call predecessors, (47), 47 states have call successors, (47) [2022-11-19 06:50:09,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 466 transitions. [2022-11-19 06:50:09,426 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 466 transitions. Word has length 45 [2022-11-19 06:50:09,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:50:09,427 INFO L495 AbstractCegarLoop]: Abstraction has 324 states and 466 transitions. [2022-11-19 06:50:09,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-19 06:50:09,427 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 466 transitions. [2022-11-19 06:50:09,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-19 06:50:09,433 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:50:09,433 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:50:09,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 06:50:09,434 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:50:09,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:50:09,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1501225326, now seen corresponding path program 1 times [2022-11-19 06:50:09,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:50:09,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851905473] [2022-11-19 06:50:09,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:50:09,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:50:09,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:50:09,631 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 06:50:09,632 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:50:09,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851905473] [2022-11-19 06:50:09,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851905473] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:50:09,632 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:50:09,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 06:50:09,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053671552] [2022-11-19 06:50:09,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:50:09,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 06:50:09,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:50:09,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 06:50:09,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 06:50:09,636 INFO L87 Difference]: Start difference. First operand 324 states and 466 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-19 06:50:10,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:50:10,634 INFO L93 Difference]: Finished difference Result 726 states and 969 transitions. [2022-11-19 06:50:10,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 06:50:10,636 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2022-11-19 06:50:10,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:50:10,645 INFO L225 Difference]: With dead ends: 726 [2022-11-19 06:50:10,646 INFO L226 Difference]: Without dead ends: 594 [2022-11-19 06:50:10,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-19 06:50:10,654 INFO L413 NwaCegarLoop]: 472 mSDtfsCounter, 952 mSDsluCounter, 734 mSDsCounter, 0 mSdLazyCounter, 650 mSolverCounterSat, 280 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 956 SdHoareTripleChecker+Valid, 1206 SdHoareTripleChecker+Invalid, 930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 280 IncrementalHoareTripleChecker+Valid, 650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-19 06:50:10,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [956 Valid, 1206 Invalid, 930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [280 Valid, 650 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-19 06:50:10,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2022-11-19 06:50:10,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 510. [2022-11-19 06:50:10,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 383 states have (on average 1.3785900783289817) internal successors, (528), 389 states have internal predecessors, (528), 78 states have call successors, (78), 45 states have call predecessors, (78), 47 states have return successors, (78), 77 states have call predecessors, (78), 74 states have call successors, (78) [2022-11-19 06:50:10,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 684 transitions. [2022-11-19 06:50:10,726 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 684 transitions. Word has length 45 [2022-11-19 06:50:10,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:50:10,727 INFO L495 AbstractCegarLoop]: Abstraction has 510 states and 684 transitions. [2022-11-19 06:50:10,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-19 06:50:10,727 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 684 transitions. [2022-11-19 06:50:10,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-19 06:50:10,735 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:50:10,735 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:50:10,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 06:50:10,736 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:50:10,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:50:10,746 INFO L85 PathProgramCache]: Analyzing trace with hash -36762483, now seen corresponding path program 1 times [2022-11-19 06:50:10,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:50:10,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116459502] [2022-11-19 06:50:10,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:50:10,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:50:10,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:50:11,176 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 06:50:11,176 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:50:11,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116459502] [2022-11-19 06:50:11,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116459502] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:50:11,177 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:50:11,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-19 06:50:11,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152595919] [2022-11-19 06:50:11,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:50:11,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 06:50:11,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:50:11,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 06:50:11,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-19 06:50:11,179 INFO L87 Difference]: Start difference. First operand 510 states and 684 transitions. Second operand has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-19 06:50:12,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:50:12,281 INFO L93 Difference]: Finished difference Result 1026 states and 1300 transitions. [2022-11-19 06:50:12,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-19 06:50:12,282 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2022-11-19 06:50:12,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:50:12,286 INFO L225 Difference]: With dead ends: 1026 [2022-11-19 06:50:12,286 INFO L226 Difference]: Without dead ends: 724 [2022-11-19 06:50:12,288 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-19 06:50:12,289 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 566 mSDsluCounter, 972 mSDsCounter, 0 mSdLazyCounter, 1170 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 598 SdHoareTripleChecker+Valid, 1196 SdHoareTripleChecker+Invalid, 1277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 1170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-19 06:50:12,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [598 Valid, 1196 Invalid, 1277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 1170 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-19 06:50:12,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2022-11-19 06:50:12,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 689. [2022-11-19 06:50:12,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 689 states, 508 states have (on average 1.3385826771653544) internal successors, (680), 515 states have internal predecessors, (680), 105 states have call successors, (105), 68 states have call predecessors, (105), 74 states have return successors, (109), 107 states have call predecessors, (109), 101 states have call successors, (109) [2022-11-19 06:50:12,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 689 states to 689 states and 894 transitions. [2022-11-19 06:50:12,405 INFO L78 Accepts]: Start accepts. Automaton has 689 states and 894 transitions. Word has length 46 [2022-11-19 06:50:12,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:50:12,405 INFO L495 AbstractCegarLoop]: Abstraction has 689 states and 894 transitions. [2022-11-19 06:50:12,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-19 06:50:12,406 INFO L276 IsEmpty]: Start isEmpty. Operand 689 states and 894 transitions. [2022-11-19 06:50:12,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-19 06:50:12,407 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:50:12,408 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:50:12,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 06:50:12,408 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:50:12,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:50:12,409 INFO L85 PathProgramCache]: Analyzing trace with hash -457206006, now seen corresponding path program 1 times [2022-11-19 06:50:12,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:50:12,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915357596] [2022-11-19 06:50:12,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:50:12,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:50:12,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:50:12,468 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 06:50:12,469 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:50:12,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915357596] [2022-11-19 06:50:12,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915357596] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:50:12,470 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:50:12,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:50:12,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183525105] [2022-11-19 06:50:12,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:50:12,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:50:12,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:50:12,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:50:12,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:50:12,472 INFO L87 Difference]: Start difference. First operand 689 states and 894 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 06:50:12,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:50:12,723 INFO L93 Difference]: Finished difference Result 1253 states and 1564 transitions. [2022-11-19 06:50:12,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:50:12,723 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), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2022-11-19 06:50:12,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:50:12,728 INFO L225 Difference]: With dead ends: 1253 [2022-11-19 06:50:12,729 INFO L226 Difference]: Without dead ends: 821 [2022-11-19 06:50:12,730 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 06:50:12,732 INFO L413 NwaCegarLoop]: 351 mSDtfsCounter, 67 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 664 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:50:12,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 664 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:50:12,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 821 states. [2022-11-19 06:50:12,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 821 to 716. [2022-11-19 06:50:12,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 531 states have (on average 1.3276836158192091) internal successors, (705), 538 states have internal predecessors, (705), 107 states have call successors, (107), 70 states have call predecessors, (107), 76 states have return successors, (111), 109 states have call predecessors, (111), 103 states have call successors, (111) [2022-11-19 06:50:12,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 923 transitions. [2022-11-19 06:50:12,802 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 923 transitions. Word has length 47 [2022-11-19 06:50:12,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:50:12,803 INFO L495 AbstractCegarLoop]: Abstraction has 716 states and 923 transitions. [2022-11-19 06:50:12,803 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), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 06:50:12,803 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 923 transitions. [2022-11-19 06:50:12,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-19 06:50:12,804 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:50:12,805 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2022-11-19 06:50:12,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 06:50:12,805 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:50:12,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:50:12,806 INFO L85 PathProgramCache]: Analyzing trace with hash -982022831, now seen corresponding path program 1 times [2022-11-19 06:50:12,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:50:12,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719498585] [2022-11-19 06:50:12,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:50:12,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:50:12,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:50:12,858 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 06:50:12,858 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:50:12,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719498585] [2022-11-19 06:50:12,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719498585] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:50:12,859 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:50:12,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:50:12,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064509223] [2022-11-19 06:50:12,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:50:12,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:50:12,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:50:12,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:50:12,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:50:12,861 INFO L87 Difference]: Start difference. First operand 716 states and 923 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 06:50:13,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:50:13,058 INFO L93 Difference]: Finished difference Result 906 states and 1144 transitions. [2022-11-19 06:50:13,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:50:13,059 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 53 [2022-11-19 06:50:13,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:50:13,062 INFO L225 Difference]: With dead ends: 906 [2022-11-19 06:50:13,062 INFO L226 Difference]: Without dead ends: 633 [2022-11-19 06:50:13,063 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 06:50:13,064 INFO L413 NwaCegarLoop]: 349 mSDtfsCounter, 372 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:50:13,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [372 Valid, 410 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:50:13,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2022-11-19 06:50:13,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 524. [2022-11-19 06:50:13,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 391 states have (on average 1.3375959079283888) internal successors, (523), 396 states have internal predecessors, (523), 83 states have call successors, (83), 50 states have call predecessors, (83), 48 states have return successors, (79), 79 states have call predecessors, (79), 79 states have call successors, (79) [2022-11-19 06:50:13,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 685 transitions. [2022-11-19 06:50:13,116 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 685 transitions. Word has length 53 [2022-11-19 06:50:13,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:50:13,117 INFO L495 AbstractCegarLoop]: Abstraction has 524 states and 685 transitions. [2022-11-19 06:50:13,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 06:50:13,117 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 685 transitions. [2022-11-19 06:50:13,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-19 06:50:13,118 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:50:13,118 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:50:13,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-19 06:50:13,119 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:50:13,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:50:13,119 INFO L85 PathProgramCache]: Analyzing trace with hash -346828501, now seen corresponding path program 1 times [2022-11-19 06:50:13,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:50:13,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71871482] [2022-11-19 06:50:13,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:50:13,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:50:13,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:50:13,201 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:50:13,201 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:50:13,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71871482] [2022-11-19 06:50:13,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71871482] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:50:13,202 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:50:13,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 06:50:13,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267154948] [2022-11-19 06:50:13,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:50:13,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 06:50:13,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:50:13,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 06:50:13,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 06:50:13,204 INFO L87 Difference]: Start difference. First operand 524 states and 685 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-19 06:50:13,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:50:13,582 INFO L93 Difference]: Finished difference Result 627 states and 801 transitions. [2022-11-19 06:50:13,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 06:50:13,583 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 54 [2022-11-19 06:50:13,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:50:13,586 INFO L225 Difference]: With dead ends: 627 [2022-11-19 06:50:13,586 INFO L226 Difference]: Without dead ends: 624 [2022-11-19 06:50:13,587 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 06:50:13,588 INFO L413 NwaCegarLoop]: 346 mSDtfsCounter, 673 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 673 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 06:50:13,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [673 Valid, 386 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 06:50:13,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2022-11-19 06:50:13,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 523. [2022-11-19 06:50:13,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 391 states have (on average 1.329923273657289) internal successors, (520), 395 states have internal predecessors, (520), 82 states have call successors, (82), 50 states have call predecessors, (82), 48 states have return successors, (79), 79 states have call predecessors, (79), 79 states have call successors, (79) [2022-11-19 06:50:13,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 681 transitions. [2022-11-19 06:50:13,647 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 681 transitions. Word has length 54 [2022-11-19 06:50:13,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:50:13,648 INFO L495 AbstractCegarLoop]: Abstraction has 523 states and 681 transitions. [2022-11-19 06:50:13,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-19 06:50:13,648 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 681 transitions. [2022-11-19 06:50:13,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-19 06:50:13,649 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:50:13,649 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:50:13,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-19 06:50:13,650 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:50:13,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:50:13,650 INFO L85 PathProgramCache]: Analyzing trace with hash 2131683443, now seen corresponding path program 1 times [2022-11-19 06:50:13,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:50:13,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713394553] [2022-11-19 06:50:13,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:50:13,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:50:13,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:50:13,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:50:13,865 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:50:13,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713394553] [2022-11-19 06:50:13,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713394553] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:50:13,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2532161] [2022-11-19 06:50:13,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:50:13,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:50:13,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9acd62b-0833-4c83-9481-13ff3c00e5f5/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:50:13,875 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9acd62b-0833-4c83-9481-13ff3c00e5f5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:50:13,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9acd62b-0833-4c83-9481-13ff3c00e5f5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 06:50:14,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:50:14,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 06:50:14,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:50:14,451 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:50:14,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:50:14,618 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:50:14,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2532161] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:50:14,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [409848048] [2022-11-19 06:50:14,641 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2022-11-19 06:50:14,641 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:50:14,645 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:50:14,651 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:50:14,651 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:50:22,852 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 215 for LOIs [2022-11-19 06:50:22,919 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 183 for LOIs [2022-11-19 06:50:22,952 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 211 for LOIs [2022-11-19 06:50:23,002 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 219 for LOIs [2022-11-19 06:50:24,080 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 215 for LOIs [2022-11-19 06:50:24,211 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 215 for LOIs [2022-11-19 06:50:24,322 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 215 for LOIs [2022-11-19 06:50:24,380 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 222 for LOIs [2022-11-19 06:50:24,411 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:51:01,083 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12910#(and (= ~E_12~0 2) (= ~q_req_up~0 1) (= ~T6_E~0 2) (= ~t6_i~0 0) (= ~t5_i~0 0) (= 0 ~t5_pc~0) (= ~E_4~0 2) (= ~T11_E~0 2) (= ~t10_i~0 0) (= ~t7_i~0 0) (= ~t1_pc~0 0) (= 0 ~t8_pc~0) (= 0 ~t7_pc~0) (= ~T4_E~0 2) (= ~E_13~0 2) (= ~E_7~0 2) (= ~E_8~0 2) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~T5_E~0 2) (= ~t13_st~0 0) (= ~m_st~0 0) (= ~E_5~0 2) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (= ~E_10~0 2) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (= ~T9_E~0 2) (= 0 ~t6_pc~0) (= 0 ~t5_st~0) (= ~E_3~0 2) (= 0 ~t3_pc~0) (= 0 ~t6_st~0) (= ~t9_i~0 0) (= ~t2_i~0 0) (= 0 ~t8_st~0) (= ~E_6~0 2) (= ~t4_i~0 0) (= ~E_11~0 2) (= ~t1_st~0 0) (= ~c_num_read~0 1) (= ~T7_E~0 2) (= ~m_i~0 0) (= ~t10_st~0 0) (= ~t10_pc~0 0) (= 0 ~t9_pc~0) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~t11_pc~0 0) (= ~p_dw_pc~0 1) (= ~T12_E~0 2) (= ~t11_i~0 0) (= ~T13_E~0 2) (= ~t12_pc~0 0) (= ~E_2~0 2) (= ~c_last_read~0 ~q_buf_0~0) (= ~T3_E~0 2) (= ~t12_i~0 0) (= ~local~0 0) (= ~t3_i~0 0) (= 0 ~t7_st~0) (= ~t8_i~0 0) (= ~t13_i~0 0) (= ~token~0 0) (= ~c_dr_pc~0 0) (= 2 ~p_dw_st~0) (= ~m_pc~0 0) (= 0 ~t9_st~0) (= ~T10_E~0 2) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (= |#NULL.offset| 0) (= ~c_last_read~0 ~p_last_write~0) (= ~E_M~0 2) (= ~a_t~0 0) (= 0 ~t2_st~0) (= ~t12_st~0 0) (= 0 ~t4_pc~0) (= ~t13_pc~0 0) (= ~t11_st~0 0) (= ~E_1~0 2) (= 0 ~t3_st~0) (= ~T8_E~0 2) (= ~M_E~0 2) (<= 0 |#StackHeapBarrier|) (= ~E_9~0 2) (= ~c_dr_st~0 1) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-11-19 06:51:01,083 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:51:01,083 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:51:01,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2022-11-19 06:51:01,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218390164] [2022-11-19 06:51:01,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:51:01,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 06:51:01,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:51:01,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 06:51:01,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1867, Unknown=0, NotChecked=0, Total=2070 [2022-11-19 06:51:01,087 INFO L87 Difference]: Start difference. First operand 523 states and 681 transitions. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 4 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-19 06:51:01,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:51:01,923 INFO L93 Difference]: Finished difference Result 1096 states and 1336 transitions. [2022-11-19 06:51:01,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 06:51:01,924 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 4 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 55 [2022-11-19 06:51:01,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:51:01,931 INFO L225 Difference]: With dead ends: 1096 [2022-11-19 06:51:01,931 INFO L226 Difference]: Without dead ends: 1093 [2022-11-19 06:51:01,933 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 122 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 36.7s TimeCoverageRelationStatistics Valid=203, Invalid=1867, Unknown=0, NotChecked=0, Total=2070 [2022-11-19 06:51:01,934 INFO L413 NwaCegarLoop]: 451 mSDtfsCounter, 630 mSDsluCounter, 760 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 630 SdHoareTripleChecker+Valid, 1211 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 06:51:01,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [630 Valid, 1211 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 626 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 06:51:01,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1093 states. [2022-11-19 06:51:02,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1093 to 818. [2022-11-19 06:51:02,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 818 states, 596 states have (on average 1.2802013422818792) internal successors, (763), 600 states have internal predecessors, (763), 130 states have call successors, (130), 92 states have call predecessors, (130), 90 states have return successors, (127), 127 states have call predecessors, (127), 127 states have call successors, (127) [2022-11-19 06:51:02,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 1020 transitions. [2022-11-19 06:51:02,036 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 1020 transitions. Word has length 55 [2022-11-19 06:51:02,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:51:02,037 INFO L495 AbstractCegarLoop]: Abstraction has 818 states and 1020 transitions. [2022-11-19 06:51:02,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 4 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-19 06:51:02,037 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 1020 transitions. [2022-11-19 06:51:02,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-19 06:51:02,039 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:51:02,039 INFO L195 NwaCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1] [2022-11-19 06:51:02,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9acd62b-0833-4c83-9481-13ff3c00e5f5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 06:51:02,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9acd62b-0833-4c83-9481-13ff3c00e5f5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-19 06:51:02,245 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:51:02,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:51:02,246 INFO L85 PathProgramCache]: Analyzing trace with hash -2127454805, now seen corresponding path program 2 times [2022-11-19 06:51:02,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:51:02,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952857900] [2022-11-19 06:51:02,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:51:02,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:51:02,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:51:02,305 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:51:02,305 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:51:02,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952857900] [2022-11-19 06:51:02,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952857900] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:51:02,306 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:51:02,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:51:02,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829333088] [2022-11-19 06:51:02,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:51:02,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:51:02,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:51:02,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:51:02,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:51:02,308 INFO L87 Difference]: Start difference. First operand 818 states and 1020 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-19 06:51:02,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:51:02,523 INFO L93 Difference]: Finished difference Result 1231 states and 1493 transitions. [2022-11-19 06:51:02,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:51:02,524 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 58 [2022-11-19 06:51:02,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:51:02,534 INFO L225 Difference]: With dead ends: 1231 [2022-11-19 06:51:02,534 INFO L226 Difference]: Without dead ends: 820 [2022-11-19 06:51:02,539 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 06:51:02,540 INFO L413 NwaCegarLoop]: 377 mSDtfsCounter, 375 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:51:02,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [375 Valid, 443 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:51:02,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2022-11-19 06:51:02,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 814. [2022-11-19 06:51:02,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 814 states, 592 states have (on average 1.2685810810810811) internal successors, (751), 596 states have internal predecessors, (751), 130 states have call successors, (130), 92 states have call predecessors, (130), 90 states have return successors, (127), 127 states have call predecessors, (127), 127 states have call successors, (127) [2022-11-19 06:51:02,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 1008 transitions. [2022-11-19 06:51:02,653 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 1008 transitions. Word has length 58 [2022-11-19 06:51:02,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:51:02,653 INFO L495 AbstractCegarLoop]: Abstraction has 814 states and 1008 transitions. [2022-11-19 06:51:02,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-19 06:51:02,658 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 1008 transitions. [2022-11-19 06:51:02,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-19 06:51:02,660 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:51:02,660 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:51:02,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-19 06:51:02,660 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:51:02,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:51:02,661 INFO L85 PathProgramCache]: Analyzing trace with hash -182434709, now seen corresponding path program 1 times [2022-11-19 06:51:02,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:51:02,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682625543] [2022-11-19 06:51:02,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:51:02,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:51:02,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:51:02,716 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 06:51:02,716 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:51:02,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682625543] [2022-11-19 06:51:02,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682625543] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:51:02,717 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:51:02,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:51:02,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094923694] [2022-11-19 06:51:02,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:51:02,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:51:02,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:51:02,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:51:02,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:51:02,719 INFO L87 Difference]: Start difference. First operand 814 states and 1008 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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 06:51:02,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:51:02,994 INFO L93 Difference]: Finished difference Result 1433 states and 1718 transitions. [2022-11-19 06:51:02,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:51:02,994 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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 61 [2022-11-19 06:51:02,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:51:02,999 INFO L225 Difference]: With dead ends: 1433 [2022-11-19 06:51:03,000 INFO L226 Difference]: Without dead ends: 1070 [2022-11-19 06:51:03,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:51:03,002 INFO L413 NwaCegarLoop]: 370 mSDtfsCounter, 42 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 700 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:51:03,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 700 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:51:03,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1070 states. [2022-11-19 06:51:03,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1070 to 889. [2022-11-19 06:51:03,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 889 states, 653 states have (on average 1.2649310872894335) internal successors, (826), 657 states have internal predecessors, (826), 137 states have call successors, (137), 99 states have call predecessors, (137), 97 states have return successors, (134), 134 states have call predecessors, (134), 134 states have call successors, (134) [2022-11-19 06:51:03,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 1097 transitions. [2022-11-19 06:51:03,111 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 1097 transitions. Word has length 61 [2022-11-19 06:51:03,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:51:03,112 INFO L495 AbstractCegarLoop]: Abstraction has 889 states and 1097 transitions. [2022-11-19 06:51:03,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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 06:51:03,112 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 1097 transitions. [2022-11-19 06:51:03,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-19 06:51:03,113 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:51:03,114 INFO L195 NwaCegarLoop]: trace histogram [3, 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 06:51:03,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-19 06:51:03,114 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:51:03,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:51:03,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1543423458, now seen corresponding path program 1 times [2022-11-19 06:51:03,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:51:03,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143005664] [2022-11-19 06:51:03,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:51:03,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:51:03,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:51:03,300 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 06:51:03,300 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:51:03,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143005664] [2022-11-19 06:51:03,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143005664] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:51:03,301 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:51:03,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-19 06:51:03,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745880925] [2022-11-19 06:51:03,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:51:03,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 06:51:03,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:51:03,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 06:51:03,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-19 06:51:03,306 INFO L87 Difference]: Start difference. First operand 889 states and 1097 transitions. Second operand has 8 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-19 06:51:04,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:51:04,455 INFO L93 Difference]: Finished difference Result 1938 states and 2280 transitions. [2022-11-19 06:51:04,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-19 06:51:04,455 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 70 [2022-11-19 06:51:04,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:51:04,461 INFO L225 Difference]: With dead ends: 1938 [2022-11-19 06:51:04,461 INFO L226 Difference]: Without dead ends: 1257 [2022-11-19 06:51:04,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-19 06:51:04,464 INFO L413 NwaCegarLoop]: 220 mSDtfsCounter, 548 mSDsluCounter, 793 mSDsCounter, 0 mSdLazyCounter, 1058 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 579 SdHoareTripleChecker+Valid, 1013 SdHoareTripleChecker+Invalid, 1159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1058 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-19 06:51:04,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [579 Valid, 1013 Invalid, 1159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1058 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-19 06:51:04,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1257 states. [2022-11-19 06:51:04,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1257 to 1208. [2022-11-19 06:51:04,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1208 states, 867 states have (on average 1.2249134948096885) internal successors, (1062), 871 states have internal predecessors, (1062), 193 states have call successors, (193), 148 states have call predecessors, (193), 146 states have return successors, (190), 190 states have call predecessors, (190), 190 states have call successors, (190) [2022-11-19 06:51:04,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1208 states to 1208 states and 1445 transitions. [2022-11-19 06:51:04,629 INFO L78 Accepts]: Start accepts. Automaton has 1208 states and 1445 transitions. Word has length 70 [2022-11-19 06:51:04,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:51:04,629 INFO L495 AbstractCegarLoop]: Abstraction has 1208 states and 1445 transitions. [2022-11-19 06:51:04,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-19 06:51:04,630 INFO L276 IsEmpty]: Start isEmpty. Operand 1208 states and 1445 transitions. [2022-11-19 06:51:04,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-19 06:51:04,631 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:51:04,631 INFO L195 NwaCegarLoop]: trace histogram [3, 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 06:51:04,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-19 06:51:04,631 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:51:04,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:51:04,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1606204126, now seen corresponding path program 1 times [2022-11-19 06:51:04,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:51:04,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732971456] [2022-11-19 06:51:04,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:51:04,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:51:04,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:51:04,684 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 06:51:04,684 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:51:04,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732971456] [2022-11-19 06:51:04,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732971456] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:51:04,685 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:51:04,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:51:04,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146602054] [2022-11-19 06:51:04,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:51:04,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:51:04,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:51:04,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:51:04,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:51:04,687 INFO L87 Difference]: Start difference. First operand 1208 states and 1445 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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 06:51:04,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:51:04,994 INFO L93 Difference]: Finished difference Result 2174 states and 2539 transitions. [2022-11-19 06:51:04,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:51:04,995 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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 71 [2022-11-19 06:51:04,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:51:05,002 INFO L225 Difference]: With dead ends: 2174 [2022-11-19 06:51:05,002 INFO L226 Difference]: Without dead ends: 1384 [2022-11-19 06:51:05,004 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 06:51:05,005 INFO L413 NwaCegarLoop]: 364 mSDtfsCounter, 37 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 694 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:51:05,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 694 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:51:05,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1384 states. [2022-11-19 06:51:05,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1384 to 1255. [2022-11-19 06:51:05,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1255 states, 906 states have (on average 1.2229580573951435) internal successors, (1108), 910 states have internal predecessors, (1108), 197 states have call successors, (197), 152 states have call predecessors, (197), 150 states have return successors, (194), 194 states have call predecessors, (194), 194 states have call successors, (194) [2022-11-19 06:51:05,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1255 states to 1255 states and 1499 transitions. [2022-11-19 06:51:05,185 INFO L78 Accepts]: Start accepts. Automaton has 1255 states and 1499 transitions. Word has length 71 [2022-11-19 06:51:05,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:51:05,186 INFO L495 AbstractCegarLoop]: Abstraction has 1255 states and 1499 transitions. [2022-11-19 06:51:05,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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 06:51:05,186 INFO L276 IsEmpty]: Start isEmpty. Operand 1255 states and 1499 transitions. [2022-11-19 06:51:05,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-19 06:51:05,188 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:51:05,188 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:51:05,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-19 06:51:05,188 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:51:05,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:51:05,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1370684203, now seen corresponding path program 1 times [2022-11-19 06:51:05,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:51:05,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539319363] [2022-11-19 06:51:05,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:51:05,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:51:05,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:51:05,322 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 06:51:05,322 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:51:05,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539319363] [2022-11-19 06:51:05,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539319363] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:51:05,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:51:05,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 06:51:05,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246058703] [2022-11-19 06:51:05,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:51:05,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 06:51:05,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:51:05,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 06:51:05,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 06:51:05,325 INFO L87 Difference]: Start difference. First operand 1255 states and 1499 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 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 06:51:06,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:51:06,743 INFO L93 Difference]: Finished difference Result 2198 states and 3071 transitions. [2022-11-19 06:51:06,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 06:51:06,744 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 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 71 [2022-11-19 06:51:06,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:51:06,755 INFO L225 Difference]: With dead ends: 2198 [2022-11-19 06:51:06,756 INFO L226 Difference]: Without dead ends: 2001 [2022-11-19 06:51:06,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-19 06:51:06,760 INFO L413 NwaCegarLoop]: 658 mSDtfsCounter, 1553 mSDsluCounter, 919 mSDsCounter, 0 mSdLazyCounter, 694 mSolverCounterSat, 307 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1571 SdHoareTripleChecker+Valid, 1577 SdHoareTripleChecker+Invalid, 1001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 307 IncrementalHoareTripleChecker+Valid, 694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:51:06,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1571 Valid, 1577 Invalid, 1001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [307 Valid, 694 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-19 06:51:06,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2001 states. [2022-11-19 06:51:07,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2001 to 1988. [2022-11-19 06:51:07,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1988 states, 1526 states have (on average 1.3499344692005242) internal successors, (2060), 1533 states have internal predecessors, (2060), 286 states have call successors, (286), 176 states have call predecessors, (286), 174 states have return successors, (349), 280 states have call predecessors, (349), 283 states have call successors, (349) [2022-11-19 06:51:07,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1988 states to 1988 states and 2695 transitions. [2022-11-19 06:51:07,076 INFO L78 Accepts]: Start accepts. Automaton has 1988 states and 2695 transitions. Word has length 71 [2022-11-19 06:51:07,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:51:07,076 INFO L495 AbstractCegarLoop]: Abstraction has 1988 states and 2695 transitions. [2022-11-19 06:51:07,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 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 06:51:07,077 INFO L276 IsEmpty]: Start isEmpty. Operand 1988 states and 2695 transitions. [2022-11-19 06:51:07,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-19 06:51:07,080 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:51:07,081 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:51:07,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-19 06:51:07,081 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:51:07,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:51:07,083 INFO L85 PathProgramCache]: Analyzing trace with hash -564405114, now seen corresponding path program 1 times [2022-11-19 06:51:07,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:51:07,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402511940] [2022-11-19 06:51:07,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:51:07,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:51:07,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:51:07,521 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-19 06:51:07,521 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:51:07,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402511940] [2022-11-19 06:51:07,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402511940] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:51:07,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679006428] [2022-11-19 06:51:07,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:51:07,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:51:07,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9acd62b-0833-4c83-9481-13ff3c00e5f5/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:51:07,523 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9acd62b-0833-4c83-9481-13ff3c00e5f5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:51:07,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9acd62b-0833-4c83-9481-13ff3c00e5f5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 06:51:07,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:51:07,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-19 06:51:07,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:51:07,756 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 06:51:07,756 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:51:07,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679006428] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:51:07,756 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 06:51:07,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [14] total 17 [2022-11-19 06:51:07,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380177539] [2022-11-19 06:51:07,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:51:07,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 06:51:07,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:51:07,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 06:51:07,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-11-19 06:51:07,759 INFO L87 Difference]: Start difference. First operand 1988 states and 2695 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-19 06:51:08,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:51:08,354 INFO L93 Difference]: Finished difference Result 2852 states and 3700 transitions. [2022-11-19 06:51:08,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 06:51:08,355 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 102 [2022-11-19 06:51:08,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:51:08,365 INFO L225 Difference]: With dead ends: 2852 [2022-11-19 06:51:08,366 INFO L226 Difference]: Without dead ends: 1805 [2022-11-19 06:51:08,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-11-19 06:51:08,370 INFO L413 NwaCegarLoop]: 379 mSDtfsCounter, 370 mSDsluCounter, 1050 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 1429 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 06:51:08,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [372 Valid, 1429 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 06:51:08,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1805 states. [2022-11-19 06:51:08,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1805 to 1620. [2022-11-19 06:51:08,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1620 states, 1289 states have (on average 1.3886733902249806) internal successors, (1790), 1296 states have internal predecessors, (1790), 215 states have call successors, (215), 116 states have call predecessors, (215), 114 states have return successors, (278), 209 states have call predecessors, (278), 212 states have call successors, (278) [2022-11-19 06:51:08,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1620 states to 1620 states and 2283 transitions. [2022-11-19 06:51:08,613 INFO L78 Accepts]: Start accepts. Automaton has 1620 states and 2283 transitions. Word has length 102 [2022-11-19 06:51:08,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:51:08,613 INFO L495 AbstractCegarLoop]: Abstraction has 1620 states and 2283 transitions. [2022-11-19 06:51:08,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-19 06:51:08,614 INFO L276 IsEmpty]: Start isEmpty. Operand 1620 states and 2283 transitions. [2022-11-19 06:51:08,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-19 06:51:08,616 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:51:08,616 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:51:08,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9acd62b-0833-4c83-9481-13ff3c00e5f5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 06:51:08,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9acd62b-0833-4c83-9481-13ff3c00e5f5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-19 06:51:08,823 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:51:08,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:51:08,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1286120463, now seen corresponding path program 1 times [2022-11-19 06:51:08,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:51:08,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430593378] [2022-11-19 06:51:08,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:51:08,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:51:08,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:51:09,048 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 25 proven. 8 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-19 06:51:09,048 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:51:09,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430593378] [2022-11-19 06:51:09,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430593378] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:51:09,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812918840] [2022-11-19 06:51:09,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:51:09,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:51:09,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9acd62b-0833-4c83-9481-13ff3c00e5f5/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:51:09,051 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9acd62b-0833-4c83-9481-13ff3c00e5f5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:51:09,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9acd62b-0833-4c83-9481-13ff3c00e5f5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 06:51:09,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:51:09,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 06:51:09,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:51:09,326 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 06:51:09,326 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:51:09,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812918840] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:51:09,327 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 06:51:09,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2022-11-19 06:51:09,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370810113] [2022-11-19 06:51:09,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:51:09,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 06:51:09,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:51:09,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 06:51:09,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-11-19 06:51:09,332 INFO L87 Difference]: Start difference. First operand 1620 states and 2283 transitions. Second operand has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-19 06:51:09,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:51:09,886 INFO L93 Difference]: Finished difference Result 2169 states and 2908 transitions. [2022-11-19 06:51:09,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 06:51:09,887 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 112 [2022-11-19 06:51:09,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:51:09,895 INFO L225 Difference]: With dead ends: 2169 [2022-11-19 06:51:09,896 INFO L226 Difference]: Without dead ends: 1576 [2022-11-19 06:51:09,898 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-11-19 06:51:09,899 INFO L413 NwaCegarLoop]: 377 mSDtfsCounter, 67 mSDsluCounter, 1420 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 1797 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 06:51:09,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 1797 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 06:51:09,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1576 states. [2022-11-19 06:51:10,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1576 to 1484. [2022-11-19 06:51:10,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1484 states, 1189 states have (on average 1.4070647603027755) internal successors, (1673), 1196 states have internal predecessors, (1673), 196 states have call successors, (196), 99 states have call predecessors, (196), 97 states have return successors, (259), 190 states have call predecessors, (259), 193 states have call successors, (259) [2022-11-19 06:51:10,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1484 states to 1484 states and 2128 transitions. [2022-11-19 06:51:10,132 INFO L78 Accepts]: Start accepts. Automaton has 1484 states and 2128 transitions. Word has length 112 [2022-11-19 06:51:10,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:51:10,133 INFO L495 AbstractCegarLoop]: Abstraction has 1484 states and 2128 transitions. [2022-11-19 06:51:10,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-19 06:51:10,133 INFO L276 IsEmpty]: Start isEmpty. Operand 1484 states and 2128 transitions. [2022-11-19 06:51:10,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-19 06:51:10,139 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:51:10,140 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:51:10,156 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9acd62b-0833-4c83-9481-13ff3c00e5f5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 06:51:10,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9acd62b-0833-4c83-9481-13ff3c00e5f5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:51:10,346 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:51:10,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:51:10,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1216054669, now seen corresponding path program 1 times [2022-11-19 06:51:10,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:51:10,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659860390] [2022-11-19 06:51:10,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:51:10,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:51:10,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:51:10,545 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-19 06:51:10,545 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:51:10,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659860390] [2022-11-19 06:51:10,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659860390] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:51:10,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846818876] [2022-11-19 06:51:10,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:51:10,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:51:10,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9acd62b-0833-4c83-9481-13ff3c00e5f5/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:51:10,547 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9acd62b-0833-4c83-9481-13ff3c00e5f5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:51:10,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9acd62b-0833-4c83-9481-13ff3c00e5f5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 06:51:10,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:51:10,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 06:51:10,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:51:10,808 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-19 06:51:10,808 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:51:10,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846818876] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:51:10,809 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 06:51:10,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 11 [2022-11-19 06:51:10,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908027135] [2022-11-19 06:51:10,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:51:10,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 06:51:10,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:51:10,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 06:51:10,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-19 06:51:10,811 INFO L87 Difference]: Start difference. First operand 1484 states and 2128 transitions. Second operand has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-19 06:51:11,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:51:11,310 INFO L93 Difference]: Finished difference Result 2233 states and 2973 transitions. [2022-11-19 06:51:11,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 06:51:11,310 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) Word has length 113 [2022-11-19 06:51:11,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:51:11,320 INFO L225 Difference]: With dead ends: 2233 [2022-11-19 06:51:11,320 INFO L226 Difference]: Without dead ends: 1776 [2022-11-19 06:51:11,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-11-19 06:51:11,323 INFO L413 NwaCegarLoop]: 366 mSDtfsCounter, 355 mSDsluCounter, 1156 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 1522 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:51:11,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [356 Valid, 1522 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 06:51:11,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1776 states. [2022-11-19 06:51:11,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1776 to 1742. [2022-11-19 06:51:11,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1742 states, 1351 states have (on average 1.3715766099185789) internal successors, (1853), 1364 states have internal predecessors, (1853), 244 states have call successors, (244), 141 states have call predecessors, (244), 145 states have return successors, (319), 238 states have call predecessors, (319), 241 states have call successors, (319) [2022-11-19 06:51:11,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1742 states to 1742 states and 2416 transitions. [2022-11-19 06:51:11,595 INFO L78 Accepts]: Start accepts. Automaton has 1742 states and 2416 transitions. Word has length 113 [2022-11-19 06:51:11,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:51:11,595 INFO L495 AbstractCegarLoop]: Abstraction has 1742 states and 2416 transitions. [2022-11-19 06:51:11,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-19 06:51:11,596 INFO L276 IsEmpty]: Start isEmpty. Operand 1742 states and 2416 transitions. [2022-11-19 06:51:11,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-19 06:51:11,598 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:51:11,599 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:51:11,615 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9acd62b-0833-4c83-9481-13ff3c00e5f5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 06:51:11,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9acd62b-0833-4c83-9481-13ff3c00e5f5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-19 06:51:11,805 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:51:11,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:51:11,806 INFO L85 PathProgramCache]: Analyzing trace with hash 704713102, now seen corresponding path program 1 times [2022-11-19 06:51:11,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:51:11,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734479678] [2022-11-19 06:51:11,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:51:11,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:51:11,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:51:12,767 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 15 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-19 06:51:12,768 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:51:12,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734479678] [2022-11-19 06:51:12,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734479678] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:51:12,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988624816] [2022-11-19 06:51:12,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:51:12,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:51:12,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9acd62b-0833-4c83-9481-13ff3c00e5f5/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:51:12,771 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9acd62b-0833-4c83-9481-13ff3c00e5f5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:51:12,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9acd62b-0833-4c83-9481-13ff3c00e5f5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 06:51:12,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:51:12,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-19 06:51:12,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:51:14,076 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 31 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 06:51:14,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:51:16,276 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 13 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-19 06:51:16,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988624816] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:51:16,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1284858158] [2022-11-19 06:51:16,280 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2022-11-19 06:51:16,280 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:51:16,281 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:51:16,281 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:51:16,282 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:53:00,547 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 392 for LOIs [2022-11-19 06:53:01,941 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 343 for LOIs [2022-11-19 06:53:02,135 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 334 for LOIs [2022-11-19 06:53:02,319 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 404 for LOIs [2022-11-19 06:53:07,977 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 222 for LOIs [2022-11-19 06:53:08,621 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 168 for LOIs [2022-11-19 06:53:09,263 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 396 for LOIs [2022-11-19 06:53:11,056 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 419 for LOIs [2022-11-19 06:53:12,365 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:54:26,295 WARN L233 SmtUtils]: Spent 7.93s on a formula simplification. DAG size of input: 368 DAG size of output: 284 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 06:54:37,282 WARN L233 SmtUtils]: Spent 8.41s on a formula simplification. DAG size of input: 374 DAG size of output: 287 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 06:54:46,706 WARN L233 SmtUtils]: Spent 8.83s on a formula simplification. DAG size of input: 380 DAG size of output: 293 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 06:54:56,209 WARN L233 SmtUtils]: Spent 8.89s on a formula simplification. DAG size of input: 382 DAG size of output: 295 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 06:55:36,414 WARN L233 SmtUtils]: Spent 8.28s on a formula simplification. DAG size of input: 384 DAG size of output: 297 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 06:55:40,212 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '56812#(and (<= 0 ~t5_pc~0) (<= 0 ~t6_i~0) (<= ~t5_st~0 0) (<= 2 ~T6_E~0) (<= 0 |#NULL.base|) (<= ~T13_E~0 2) (<= ~T5_E~0 2) (<= 2 ~T4_E~0) (<= 0 ~t13_i~0) (= ~t10_i~0 0) (<= 1 ~c_dr_i~0) (<= 0 ~t3_i~0) (<= 2 ~E_13~0) (= ~t7_i~0 0) (<= 0 ~t5_st~0) (<= ~t12_i~0 0) (<= ~T6_E~0 2) (<= 2 ~T10_E~0) (<= 0 ~t8_pc~0) (<= ~E_3~0 2) (<= ~t4_st~0 0) (<= 2 ~E_11~0) (<= 0 ~c_dr_pc~0) (<= 0 ~t1_i~0) (<= 0 ~p_dw_st~0) (<= 0 ~t6_st~0) (<= 0 ~local~0) (<= 2 ~E_M~0) (= ~T1_E~0 2) (<= 0 ~t2_pc~0) (<= ~c_dr_i~0 1) (<= 0 ~t11_pc~0) (<= 0 ~t12_i~0) (<= ~T10_E~0 2) (<= 2 ~T3_E~0) (<= 0 ~p_dw_pc~0) (<= ~t2_st~0 0) (= ~q_free~0 1) (<= 1 ~q_req_up~0) (<= 0 ~t12_st~0) (<= ~E_2~0 2) (<= 0 ~p_num_write~0) (<= 2 ~T11_E~0) (<= ~t11_st~0 0) (<= ~token~0 0) (= ~T2_E~0 2) (<= ~c_dr_pc~0 1) (<= ~p_dw_st~0 2) (<= ~t6_pc~0 0) (<= 2 ~E_12~0) (<= 0 ~t7_st~0) (<= ~T7_E~0 2) (<= ~t11_pc~0 0) (<= ~t7_pc~0 0) (<= 0 ~t12_pc~0) (<= 0 ~t13_st~0) (<= ~t1_pc~0 0) (<= ~T4_E~0 2) (<= ~t8_i~0 0) (<= 2 ~M_E~0) (<= ~T9_E~0 2) (= ~t9_i~0 0) (<= |#NULL.offset| 0) (= ~t4_i~0 0) (<= 2 ~T13_E~0) (<= 0 ~t9_st~0) (<= 0 ~t10_st~0) (<= ~t5_i~0 0) (<= 2 ~E_2~0) (<= 2 ~T8_E~0) (<= ~T11_E~0 2) (<= 0 ~t11_st~0) (<= ~t13_pc~0 0) (<= 0 ~t13_pc~0) (<= 1 ~c_dr_st~0) (<= 2 ~E_9~0) (<= ~local~0 0) (<= ~t12_st~0 0) (<= 2 ~E_6~0) (= ~m_i~0 0) (<= ~t2_i~0 0) (<= 2 ~E_8~0) (<= ~t8_st~0 0) (not (= ~c_num_read~0 ~p_num_write~0)) (<= ~T3_E~0 2) (<= ~E_4~0 2) (<= 2 ~E_7~0) (<= 2 ~E_3~0) (<= ~t10_pc~0 0) (<= ~t9_pc~0 0) (<= 0 ~t5_i~0) (<= 0 ~t8_st~0) (<= ~E_12~0 2) (<= ~t9_st~0 0) (<= ~q_req_up~0 1) (<= ~T8_E~0 2) (<= ~E_6~0 2) (<= ~E_10~0 2) (<= 0 ~token~0) (<= 0 ~t2_i~0) (<= ~t3_st~0 0) (<= 0 ~t6_pc~0) (<= |#NULL.base| 0) (<= 0 ~t3_st~0) (<= ~E_13~0 2) (<= ~m_pc~0 0) (<= ~t1_i~0 0) (<= 0 ~t10_pc~0) (<= 2 ~E_4~0) (= ~p_dw_i~0 1) (<= 2 ~T7_E~0) (<= 2 ~E_10~0) (<= ~M_E~0 2) (<= ~E_5~0 2) (<= ~m_st~0 0) (<= ~t3_pc~0 0) (= ~c_last_read~0 ~p_last_write~0) (<= 0 ~m_pc~0) (<= ~c_dr_st~0 1) (<= 2 ~T9_E~0) (<= ~t3_i~0 0) (<= 0 ~t2_st~0) (<= 0 ~t3_pc~0) (<= 0 ~t7_pc~0) (<= 0 ~t11_i~0) (<= ~t7_st~0 0) (<= 2 ~T12_E~0) (<= ~E_8~0 2) (<= 0 ~t9_pc~0) (<= ~t5_pc~0 0) (<= 2 ~E_5~0) (<= ~t6_i~0 0) (<= 0 ~t8_i~0) (<= 1 ~c_num_read~0) (<= 0 ~m_st~0) (<= 0 |#NULL.offset|) (<= ~t12_pc~0 0) (<= 2 ~T5_E~0) (<= ~t13_st~0 0) (<= ~t4_pc~0 0) (= ~E_1~0 2) (<= 0 ~t4_pc~0) (<= ~t2_pc~0 0) (<= ~t1_st~0 0) (<= 0 |#StackHeapBarrier|) (<= ~E_M~0 2) (<= ~E_11~0 2) (<= ~t11_i~0 0) (<= ~t6_st~0 0) (<= 0 ~t1_st~0) (<= ~E_7~0 2) (<= ~t8_pc~0 0) (<= ~t10_st~0 0) (<= ~E_9~0 2) (<= 0 ~t1_pc~0) (<= 0 ~t4_st~0) (<= ~T12_E~0 2) (<= ~t13_i~0 0))' at error location [2022-11-19 06:55:40,212 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:55:40,212 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:55:40,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 16] total 49 [2022-11-19 06:55:40,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930619972] [2022-11-19 06:55:40,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:55:40,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-19 06:55:40,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:55:40,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-19 06:55:40,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=770, Invalid=10150, Unknown=0, NotChecked=0, Total=10920 [2022-11-19 06:55:40,219 INFO L87 Difference]: Start difference. First operand 1742 states and 2416 transitions. Second operand has 49 states, 32 states have (on average 6.09375) internal successors, (195), 37 states have internal predecessors, (195), 17 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 17 states have call predecessors, (46), 17 states have call successors, (46) [2022-11-19 06:56:11,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:56:11,667 INFO L93 Difference]: Finished difference Result 4032 states and 5070 transitions. [2022-11-19 06:56:11,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 218 states. [2022-11-19 06:56:11,668 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 32 states have (on average 6.09375) internal successors, (195), 37 states have internal predecessors, (195), 17 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 17 states have call predecessors, (46), 17 states have call successors, (46) Word has length 114 [2022-11-19 06:56:11,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:56:11,686 INFO L225 Difference]: With dead ends: 4032 [2022-11-19 06:56:11,686 INFO L226 Difference]: Without dead ends: 3317 [2022-11-19 06:56:11,706 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 607 GetRequests, 288 SyntacticMatches, 6 SemanticMatches, 313 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40605 ImplicationChecksByTransitivity, 172.1s TimeCoverageRelationStatistics Valid=9166, Invalid=89744, Unknown=0, NotChecked=0, Total=98910 [2022-11-19 06:56:11,707 INFO L413 NwaCegarLoop]: 275 mSDtfsCounter, 6593 mSDsluCounter, 2781 mSDsCounter, 0 mSdLazyCounter, 7019 mSolverCounterSat, 3076 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6595 SdHoareTripleChecker+Valid, 3056 SdHoareTripleChecker+Invalid, 10095 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3076 IncrementalHoareTripleChecker+Valid, 7019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2022-11-19 06:56:11,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6595 Valid, 3056 Invalid, 10095 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3076 Valid, 7019 Invalid, 0 Unknown, 0 Unchecked, 6.9s Time] [2022-11-19 06:56:11,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3317 states. [2022-11-19 06:56:12,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3317 to 2018. [2022-11-19 06:56:12,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2018 states, 1535 states have (on average 1.3446254071661239) internal successors, (2064), 1550 states have internal predecessors, (2064), 289 states have call successors, (289), 178 states have call predecessors, (289), 192 states have return successors, (376), 291 states have call predecessors, (376), 286 states have call successors, (376) [2022-11-19 06:56:12,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2018 states to 2018 states and 2729 transitions. [2022-11-19 06:56:12,222 INFO L78 Accepts]: Start accepts. Automaton has 2018 states and 2729 transitions. Word has length 114 [2022-11-19 06:56:12,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:56:12,223 INFO L495 AbstractCegarLoop]: Abstraction has 2018 states and 2729 transitions. [2022-11-19 06:56:12,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 32 states have (on average 6.09375) internal successors, (195), 37 states have internal predecessors, (195), 17 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 17 states have call predecessors, (46), 17 states have call successors, (46) [2022-11-19 06:56:12,224 INFO L276 IsEmpty]: Start isEmpty. Operand 2018 states and 2729 transitions. [2022-11-19 06:56:12,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-19 06:56:12,227 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:56:12,228 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:56:12,239 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9acd62b-0833-4c83-9481-13ff3c00e5f5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 06:56:12,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9acd62b-0833-4c83-9481-13ff3c00e5f5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-19 06:56:12,436 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:56:12,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:56:12,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1854683568, now seen corresponding path program 1 times [2022-11-19 06:56:12,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:56:12,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099721621] [2022-11-19 06:56:12,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:56:12,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:56:12,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:56:12,887 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 23 proven. 11 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-19 06:56:12,887 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:56:12,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099721621] [2022-11-19 06:56:12,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099721621] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:56:12,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757486202] [2022-11-19 06:56:12,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:56:12,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:56:12,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9acd62b-0833-4c83-9481-13ff3c00e5f5/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:56:12,891 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9acd62b-0833-4c83-9481-13ff3c00e5f5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:56:12,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9acd62b-0833-4c83-9481-13ff3c00e5f5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 06:56:13,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:56:13,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 06:56:13,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:56:13,211 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-19 06:56:13,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:56:13,470 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-19 06:56:13,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757486202] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-19 06:56:13,470 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 06:56:13,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [14, 8] total 20 [2022-11-19 06:56:13,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763429968] [2022-11-19 06:56:13,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:56:13,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 06:56:13,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:56:13,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 06:56:13,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-11-19 06:56:13,473 INFO L87 Difference]: Start difference. First operand 2018 states and 2729 transitions. Second operand has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-19 06:56:14,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:56:14,963 INFO L93 Difference]: Finished difference Result 3342 states and 4277 transitions. [2022-11-19 06:56:14,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-19 06:56:14,964 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 115 [2022-11-19 06:56:14,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:56:14,977 INFO L225 Difference]: With dead ends: 3342 [2022-11-19 06:56:14,977 INFO L226 Difference]: Without dead ends: 2351 [2022-11-19 06:56:14,981 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2022-11-19 06:56:14,981 INFO L413 NwaCegarLoop]: 278 mSDtfsCounter, 574 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 992 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 578 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 1112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 992 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-19 06:56:14,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [578 Valid, 616 Invalid, 1112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 992 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-19 06:56:14,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2351 states. [2022-11-19 06:56:15,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2351 to 2098. [2022-11-19 06:56:15,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2098 states, 1580 states have (on average 1.3386075949367089) internal successors, (2115), 1598 states have internal predecessors, (2115), 308 states have call successors, (308), 187 states have call predecessors, (308), 208 states have return successors, (416), 314 states have call predecessors, (416), 305 states have call successors, (416) [2022-11-19 06:56:15,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2098 states to 2098 states and 2839 transitions. [2022-11-19 06:56:15,535 INFO L78 Accepts]: Start accepts. Automaton has 2098 states and 2839 transitions. Word has length 115 [2022-11-19 06:56:15,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:56:15,536 INFO L495 AbstractCegarLoop]: Abstraction has 2098 states and 2839 transitions. [2022-11-19 06:56:15,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-19 06:56:15,537 INFO L276 IsEmpty]: Start isEmpty. Operand 2098 states and 2839 transitions. [2022-11-19 06:56:15,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-19 06:56:15,540 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:56:15,542 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:56:15,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9acd62b-0833-4c83-9481-13ff3c00e5f5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-19 06:56:15,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9acd62b-0833-4c83-9481-13ff3c00e5f5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-19 06:56:15,749 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:56:15,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:56:15,750 INFO L85 PathProgramCache]: Analyzing trace with hash -388680401, now seen corresponding path program 1 times [2022-11-19 06:56:15,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:56:15,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255740978] [2022-11-19 06:56:15,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:56:15,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:56:15,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:56:16,780 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 34 proven. 19 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-19 06:56:16,781 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:56:16,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255740978] [2022-11-19 06:56:16,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255740978] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:56:16,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255462610] [2022-11-19 06:56:16,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:56:16,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:56:16,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9acd62b-0833-4c83-9481-13ff3c00e5f5/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:56:16,784 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9acd62b-0833-4c83-9481-13ff3c00e5f5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:56:16,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9acd62b-0833-4c83-9481-13ff3c00e5f5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 06:56:17,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:56:17,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 619 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-19 06:56:17,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:56:18,262 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 60 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 06:56:18,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:56:20,633 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 13 proven. 44 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-19 06:56:20,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255462610] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:56:20,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [52329834] [2022-11-19 06:56:20,637 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2022-11-19 06:56:20,638 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:56:20,638 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:56:20,638 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:56:20,639 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:56:59,365 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 392 for LOIs [2022-11-19 06:57:00,686 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 182 for LOIs [2022-11-19 06:57:00,709 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 170 for LOIs [2022-11-19 06:57:00,735 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 404 for LOIs [2022-11-19 06:57:06,643 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 222 for LOIs [2022-11-19 06:57:07,377 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 170 for LOIs [2022-11-19 06:57:08,081 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 396 for LOIs [2022-11-19 06:57:09,621 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 419 for LOIs [2022-11-19 06:57:11,607 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:57:31,705 WARN L233 SmtUtils]: Spent 5.13s on a formula simplification. DAG size of input: 412 DAG size of output: 273 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 06:59:18,207 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '75441#(and (= ~E_12~0 2) (= ~q_req_up~0 1) (= ~T6_E~0 2) (= ~t6_i~0 0) (= ~t5_i~0 0) (= 0 ~t5_pc~0) (= ~E_4~0 2) (= ~T11_E~0 2) (= ~t10_i~0 0) (= ~t7_i~0 0) (= ~t1_pc~0 0) (= 0 ~t8_pc~0) (= 0 ~t7_pc~0) (= ~T4_E~0 2) (= ~E_13~0 2) (= ~E_7~0 2) (= ~E_8~0 2) (<= 0 ~p_dw_st~0) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~T5_E~0 2) (= ~t13_st~0 0) (<= 0 ~p_dw_pc~0) (= ~m_st~0 0) (= ~E_5~0 2) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (= ~E_10~0 2) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (<= ~p_dw_st~0 2) (= ~T9_E~0 2) (= 0 ~t6_pc~0) (= 0 ~t5_st~0) (= ~E_3~0 2) (= 0 ~t3_pc~0) (= 0 ~t6_st~0) (= ~t9_i~0 0) (= ~t2_i~0 0) (= 0 ~t8_st~0) (= ~E_6~0 2) (= ~t4_i~0 0) (= ~c_dr_pc~0 1) (= ~E_11~0 2) (= ~t1_st~0 0) (= ~c_num_read~0 1) (= ~T7_E~0 2) (= ~m_i~0 0) (= ~t10_st~0 0) (= ~t10_pc~0 0) (= 0 ~t9_pc~0) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~t11_pc~0 0) (= ~T12_E~0 2) (= ~t11_i~0 0) (= ~T13_E~0 2) (= ~t12_pc~0 0) (= ~E_2~0 2) (= ~c_last_read~0 ~q_buf_0~0) (= ~T3_E~0 2) (= ~t12_i~0 0) (= ~local~0 0) (= ~t3_i~0 0) (= 0 ~t7_st~0) (= ~t8_i~0 0) (= ~t13_i~0 0) (= ~token~0 0) (= ~m_pc~0 0) (= 0 ~t9_st~0) (= ~T10_E~0 2) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (= |#NULL.offset| 0) (= ~c_last_read~0 ~p_last_write~0) (= ~E_M~0 2) (= 0 ~t2_st~0) (= ~t12_st~0 0) (= 0 ~t4_pc~0) (= ~t13_pc~0 0) (= ~t11_st~0 0) (= ~E_1~0 2) (= 0 ~t3_st~0) (= ~T8_E~0 2) (= ~M_E~0 2) (<= 0 |#StackHeapBarrier|) (= ~E_9~0 2) (= ~c_dr_st~0 1) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-11-19 06:59:18,207 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:59:18,207 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:59:18,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 49 [2022-11-19 06:59:18,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982840303] [2022-11-19 06:59:18,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:59:18,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-19 06:59:18,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:59:18,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-19 06:59:18,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=870, Invalid=10050, Unknown=0, NotChecked=0, Total=10920 [2022-11-19 06:59:18,212 INFO L87 Difference]: Start difference. First operand 2098 states and 2839 transitions. Second operand has 49 states, 33 states have (on average 6.484848484848484) internal successors, (214), 38 states have internal predecessors, (214), 22 states have call successors, (49), 15 states have call predecessors, (49), 21 states have return successors, (51), 21 states have call predecessors, (51), 22 states have call successors, (51) [2022-11-19 06:59:31,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:59:31,295 INFO L93 Difference]: Finished difference Result 4947 states and 6181 transitions. [2022-11-19 06:59:31,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-11-19 06:59:31,296 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 33 states have (on average 6.484848484848484) internal successors, (214), 38 states have internal predecessors, (214), 22 states have call successors, (49), 15 states have call predecessors, (49), 21 states have return successors, (51), 21 states have call predecessors, (51), 22 states have call successors, (51) Word has length 124 [2022-11-19 06:59:31,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:59:31,315 INFO L225 Difference]: With dead ends: 4947 [2022-11-19 06:59:31,315 INFO L226 Difference]: Without dead ends: 3876 [2022-11-19 06:59:31,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 312 SyntacticMatches, 5 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14493 ImplicationChecksByTransitivity, 134.6s TimeCoverageRelationStatistics Valid=3638, Invalid=31518, Unknown=0, NotChecked=0, Total=35156 [2022-11-19 06:59:31,324 INFO L413 NwaCegarLoop]: 250 mSDtfsCounter, 4664 mSDsluCounter, 2543 mSDsCounter, 0 mSdLazyCounter, 5801 mSolverCounterSat, 2217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4665 SdHoareTripleChecker+Valid, 2793 SdHoareTripleChecker+Invalid, 8018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2217 IncrementalHoareTripleChecker+Valid, 5801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-11-19 06:59:31,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4665 Valid, 2793 Invalid, 8018 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2217 Valid, 5801 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-11-19 06:59:31,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3876 states. [2022-11-19 06:59:32,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3876 to 2635. [2022-11-19 06:59:32,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2635 states, 1966 states have (on average 1.3041709053916581) internal successors, (2564), 1984 states have internal predecessors, (2564), 382 states have call successors, (382), 246 states have call predecessors, (382), 285 states have return successors, (508), 406 states have call predecessors, (508), 379 states have call successors, (508) [2022-11-19 06:59:32,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2635 states to 2635 states and 3454 transitions. [2022-11-19 06:59:32,132 INFO L78 Accepts]: Start accepts. Automaton has 2635 states and 3454 transitions. Word has length 124 [2022-11-19 06:59:32,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:59:32,134 INFO L495 AbstractCegarLoop]: Abstraction has 2635 states and 3454 transitions. [2022-11-19 06:59:32,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 33 states have (on average 6.484848484848484) internal successors, (214), 38 states have internal predecessors, (214), 22 states have call successors, (49), 15 states have call predecessors, (49), 21 states have return successors, (51), 21 states have call predecessors, (51), 22 states have call successors, (51) [2022-11-19 06:59:32,136 INFO L276 IsEmpty]: Start isEmpty. Operand 2635 states and 3454 transitions. [2022-11-19 06:59:32,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-19 06:59:32,139 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:59:32,140 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:59:32,151 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9acd62b-0833-4c83-9481-13ff3c00e5f5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-19 06:59:32,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9acd62b-0833-4c83-9481-13ff3c00e5f5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-19 06:59:32,352 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:59:32,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:59:32,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1025758795, now seen corresponding path program 1 times [2022-11-19 06:59:32,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:59:32,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577200905] [2022-11-19 06:59:32,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:59:32,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:59:32,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:59:32,646 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 38 proven. 9 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-19 06:59:32,647 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:59:32,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577200905] [2022-11-19 06:59:32,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577200905] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:59:32,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460090837] [2022-11-19 06:59:32,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:59:32,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:59:32,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9acd62b-0833-4c83-9481-13ff3c00e5f5/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:59:32,649 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9acd62b-0833-4c83-9481-13ff3c00e5f5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:59:32,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9acd62b-0833-4c83-9481-13ff3c00e5f5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-19 06:59:32,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:59:32,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 618 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-19 06:59:32,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:59:33,017 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 50 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-19 06:59:33,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:59:33,348 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 06:59:33,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460090837] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-19 06:59:33,348 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 06:59:33,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 10] total 17 [2022-11-19 06:59:33,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672977244] [2022-11-19 06:59:33,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:59:33,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 06:59:33,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:59:33,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 06:59:33,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-11-19 06:59:33,350 INFO L87 Difference]: Start difference. First operand 2635 states and 3454 transitions. Second operand has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-19 06:59:35,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:59:35,021 INFO L93 Difference]: Finished difference Result 3594 states and 4545 transitions. [2022-11-19 06:59:35,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-19 06:59:35,022 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 125 [2022-11-19 06:59:35,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:59:35,033 INFO L225 Difference]: With dead ends: 3594 [2022-11-19 06:59:35,034 INFO L226 Difference]: Without dead ends: 1986 [2022-11-19 06:59:35,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2022-11-19 06:59:35,039 INFO L413 NwaCegarLoop]: 265 mSDtfsCounter, 848 mSDsluCounter, 620 mSDsCounter, 0 mSdLazyCounter, 1174 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 850 SdHoareTripleChecker+Valid, 885 SdHoareTripleChecker+Invalid, 1366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 1174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-19 06:59:35,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [850 Valid, 885 Invalid, 1366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 1174 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-19 06:59:35,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1986 states. [2022-11-19 06:59:35,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1986 to 1645. [2022-11-19 06:59:35,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1645 states, 1269 states have (on average 1.3727344365642238) internal successors, (1742), 1286 states have internal predecessors, (1742), 232 states have call successors, (232), 125 states have call predecessors, (232), 142 states have return successors, (325), 235 states have call predecessors, (325), 229 states have call successors, (325) [2022-11-19 06:59:35,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1645 states to 1645 states and 2299 transitions. [2022-11-19 06:59:35,405 INFO L78 Accepts]: Start accepts. Automaton has 1645 states and 2299 transitions. Word has length 125 [2022-11-19 06:59:35,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:59:35,406 INFO L495 AbstractCegarLoop]: Abstraction has 1645 states and 2299 transitions. [2022-11-19 06:59:35,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-19 06:59:35,406 INFO L276 IsEmpty]: Start isEmpty. Operand 1645 states and 2299 transitions. [2022-11-19 06:59:35,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-11-19 06:59:35,411 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:59:35,411 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 06:59:35,424 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9acd62b-0833-4c83-9481-13ff3c00e5f5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-19 06:59:35,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9acd62b-0833-4c83-9481-13ff3c00e5f5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:59:35,618 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:59:35,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:59:35,619 INFO L85 PathProgramCache]: Analyzing trace with hash 696299415, now seen corresponding path program 1 times [2022-11-19 06:59:35,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:59:35,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209271598] [2022-11-19 06:59:35,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:59:35,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:59:35,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:59:35,831 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 06:59:35,831 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:59:35,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209271598] [2022-11-19 06:59:35,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209271598] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:59:35,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740363128] [2022-11-19 06:59:35,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:59:35,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:59:35,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9acd62b-0833-4c83-9481-13ff3c00e5f5/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:59:35,834 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9acd62b-0833-4c83-9481-13ff3c00e5f5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:59:35,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9acd62b-0833-4c83-9481-13ff3c00e5f5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-19 06:59:36,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:59:36,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 1129 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 06:59:36,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:59:36,219 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-19 06:59:36,219 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:59:36,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740363128] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:59:36,220 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 06:59:36,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-19 06:59:36,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315154060] [2022-11-19 06:59:36,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:59:36,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:59:36,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:59:36,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:59:36,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 06:59:36,223 INFO L87 Difference]: Start difference. First operand 1645 states and 2299 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 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 06:59:36,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:59:36,933 INFO L93 Difference]: Finished difference Result 3489 states and 5408 transitions. [2022-11-19 06:59:36,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:59:36,934 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 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 144 [2022-11-19 06:59:36,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:59:36,949 INFO L225 Difference]: With dead ends: 3489 [2022-11-19 06:59:36,949 INFO L226 Difference]: Without dead ends: 2559 [2022-11-19 06:59:36,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 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 06:59:36,955 INFO L413 NwaCegarLoop]: 352 mSDtfsCounter, 347 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:59:36,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [347 Valid, 600 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 06:59:36,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2559 states. [2022-11-19 06:59:37,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2559 to 2550. [2022-11-19 06:59:37,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2550 states, 2037 states have (on average 1.432007854688267) internal successors, (2917), 2057 states have internal predecessors, (2917), 339 states have call successors, (339), 155 states have call predecessors, (339), 172 states have return successors, (494), 339 states have call predecessors, (494), 336 states have call successors, (494) [2022-11-19 06:59:37,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2550 states to 2550 states and 3750 transitions. [2022-11-19 06:59:37,574 INFO L78 Accepts]: Start accepts. Automaton has 2550 states and 3750 transitions. Word has length 144 [2022-11-19 06:59:37,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:59:37,575 INFO L495 AbstractCegarLoop]: Abstraction has 2550 states and 3750 transitions. [2022-11-19 06:59:37,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 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 06:59:37,575 INFO L276 IsEmpty]: Start isEmpty. Operand 2550 states and 3750 transitions. [2022-11-19 06:59:37,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-11-19 06:59:37,581 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:59:37,582 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 06:59:37,590 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9acd62b-0833-4c83-9481-13ff3c00e5f5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-19 06:59:37,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9acd62b-0833-4c83-9481-13ff3c00e5f5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:59:37,790 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:59:37,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:59:37,791 INFO L85 PathProgramCache]: Analyzing trace with hash 93233749, now seen corresponding path program 1 times [2022-11-19 06:59:37,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:59:37,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58337920] [2022-11-19 06:59:37,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:59:37,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:59:37,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:59:37,969 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 06:59:37,969 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:59:37,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58337920] [2022-11-19 06:59:37,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58337920] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:59:37,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18540914] [2022-11-19 06:59:37,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:59:37,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:59:37,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9acd62b-0833-4c83-9481-13ff3c00e5f5/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:59:37,972 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9acd62b-0833-4c83-9481-13ff3c00e5f5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:59:37,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9acd62b-0833-4c83-9481-13ff3c00e5f5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-19 06:59:38,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:59:38,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 1123 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 06:59:38,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:59:38,374 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-19 06:59:38,374 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:59:38,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18540914] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:59:38,375 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 06:59:38,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-19 06:59:38,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137548389] [2022-11-19 06:59:38,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:59:38,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:59:38,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:59:38,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:59:38,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 06:59:38,377 INFO L87 Difference]: Start difference. First operand 2550 states and 3750 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 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 06:59:39,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:59:39,331 INFO L93 Difference]: Finished difference Result 6189 states and 9862 transitions. [2022-11-19 06:59:39,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:59:39,332 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 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 144 [2022-11-19 06:59:39,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:59:39,353 INFO L225 Difference]: With dead ends: 6189 [2022-11-19 06:59:39,354 INFO L226 Difference]: Without dead ends: 4354 [2022-11-19 06:59:39,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 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 06:59:39,366 INFO L413 NwaCegarLoop]: 352 mSDtfsCounter, 368 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:59:39,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [368 Valid, 600 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 06:59:39,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4354 states. [2022-11-19 06:59:40,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4354 to 4340. [2022-11-19 06:59:40,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4340 states, 3558 states have (on average 1.471894322653176) internal successors, (5237), 3584 states have internal predecessors, (5237), 548 states have call successors, (548), 215 states have call predecessors, (548), 232 states have return successors, (823), 542 states have call predecessors, (823), 545 states have call successors, (823) [2022-11-19 06:59:40,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4340 states to 4340 states and 6608 transitions. [2022-11-19 06:59:40,175 INFO L78 Accepts]: Start accepts. Automaton has 4340 states and 6608 transitions. Word has length 144 [2022-11-19 06:59:40,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:59:40,176 INFO L495 AbstractCegarLoop]: Abstraction has 4340 states and 6608 transitions. [2022-11-19 06:59:40,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 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 06:59:40,176 INFO L276 IsEmpty]: Start isEmpty. Operand 4340 states and 6608 transitions. [2022-11-19 06:59:40,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-11-19 06:59:40,186 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:59:40,186 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 06:59:40,200 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9acd62b-0833-4c83-9481-13ff3c00e5f5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-19 06:59:40,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9acd62b-0833-4c83-9481-13ff3c00e5f5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:59:40,394 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:59:40,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:59:40,395 INFO L85 PathProgramCache]: Analyzing trace with hash 1699508823, now seen corresponding path program 1 times [2022-11-19 06:59:40,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:59:40,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332883342] [2022-11-19 06:59:40,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:59:40,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:59:40,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:59:40,609 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 06:59:40,609 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:59:40,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332883342] [2022-11-19 06:59:40,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332883342] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:59:40,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898587157] [2022-11-19 06:59:40,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:59:40,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:59:40,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9acd62b-0833-4c83-9481-13ff3c00e5f5/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:59:40,612 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9acd62b-0833-4c83-9481-13ff3c00e5f5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:59:40,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9acd62b-0833-4c83-9481-13ff3c00e5f5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-19 06:59:40,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:59:40,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 1117 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 06:59:40,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:59:41,007 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-19 06:59:41,007 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:59:41,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898587157] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:59:41,007 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 06:59:41,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-19 06:59:41,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848753326] [2022-11-19 06:59:41,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:59:41,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:59:41,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:59:41,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:59:41,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 06:59:41,010 INFO L87 Difference]: Start difference. First operand 4340 states and 6608 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 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 06:59:42,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:59:42,414 INFO L93 Difference]: Finished difference Result 11529 states and 18629 transitions. [2022-11-19 06:59:42,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:59:42,415 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 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 144 [2022-11-19 06:59:42,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:59:42,454 INFO L225 Difference]: With dead ends: 11529 [2022-11-19 06:59:42,454 INFO L226 Difference]: Without dead ends: 7904 [2022-11-19 06:59:42,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 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 06:59:42,475 INFO L413 NwaCegarLoop]: 352 mSDtfsCounter, 371 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:59:42,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [371 Valid, 600 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 06:59:42,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7904 states. [2022-11-19 06:59:43,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7904 to 7880. [2022-11-19 06:59:43,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7880 states, 6570 states have (on average 1.4942161339421614) internal successors, (9817), 6608 states have internal predecessors, (9817), 956 states have call successors, (956), 335 states have call predecessors, (956), 352 states have return successors, (1463), 938 states have call predecessors, (1463), 953 states have call successors, (1463) [2022-11-19 06:59:43,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7880 states to 7880 states and 12236 transitions. [2022-11-19 06:59:43,656 INFO L78 Accepts]: Start accepts. Automaton has 7880 states and 12236 transitions. Word has length 144 [2022-11-19 06:59:43,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:59:43,657 INFO L495 AbstractCegarLoop]: Abstraction has 7880 states and 12236 transitions. [2022-11-19 06:59:43,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 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 06:59:43,657 INFO L276 IsEmpty]: Start isEmpty. Operand 7880 states and 12236 transitions. [2022-11-19 06:59:43,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-11-19 06:59:43,671 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:59:43,672 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 06:59:43,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9acd62b-0833-4c83-9481-13ff3c00e5f5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-19 06:59:43,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9acd62b-0833-4c83-9481-13ff3c00e5f5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-19 06:59:43,880 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:59:43,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:59:43,882 INFO L85 PathProgramCache]: Analyzing trace with hash -285373675, now seen corresponding path program 1 times [2022-11-19 06:59:43,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:59:43,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623430961] [2022-11-19 06:59:43,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:59:43,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:59:43,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:59:44,071 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 06:59:44,071 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:59:44,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623430961] [2022-11-19 06:59:44,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623430961] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:59:44,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986005856] [2022-11-19 06:59:44,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:59:44,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:59:44,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9acd62b-0833-4c83-9481-13ff3c00e5f5/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:59:44,074 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9acd62b-0833-4c83-9481-13ff3c00e5f5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:59:44,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9acd62b-0833-4c83-9481-13ff3c00e5f5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-19 06:59:44,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:59:44,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 1111 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 06:59:44,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:59:44,505 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 06:59:44,505 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:59:44,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986005856] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:59:44,506 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 06:59:44,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-19 06:59:44,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904735988] [2022-11-19 06:59:44,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:59:44,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:59:44,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:59:44,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:59:44,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 06:59:44,510 INFO L87 Difference]: Start difference. First operand 7880 states and 12236 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 2 states have internal predecessors, (119), 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 06:59:47,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:59:47,206 INFO L93 Difference]: Finished difference Result 22089 states and 35881 transitions. [2022-11-19 06:59:47,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:59:47,206 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 2 states have internal predecessors, (119), 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 144 [2022-11-19 06:59:47,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:59:47,284 INFO L225 Difference]: With dead ends: 22089 [2022-11-19 06:59:47,284 INFO L226 Difference]: Without dead ends: 14924 [2022-11-19 06:59:47,316 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 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 06:59:47,317 INFO L413 NwaCegarLoop]: 352 mSDtfsCounter, 341 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:59:47,317 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [341 Valid, 600 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 06:59:47,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14924 states. [2022-11-19 06:59:49,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14924 to 14880. [2022-11-19 06:59:49,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14880 states, 12534 states have (on average 1.5044678474549227) internal successors, (18857), 12596 states have internal predecessors, (18857), 1752 states have call successors, (1752), 575 states have call predecessors, (1752), 592 states have return successors, (2707), 1710 states have call predecessors, (2707), 1749 states have call successors, (2707) [2022-11-19 06:59:49,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14880 states to 14880 states and 23316 transitions. [2022-11-19 06:59:49,572 INFO L78 Accepts]: Start accepts. Automaton has 14880 states and 23316 transitions. Word has length 144 [2022-11-19 06:59:49,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:59:49,573 INFO L495 AbstractCegarLoop]: Abstraction has 14880 states and 23316 transitions. [2022-11-19 06:59:49,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 2 states have internal predecessors, (119), 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 06:59:49,573 INFO L276 IsEmpty]: Start isEmpty. Operand 14880 states and 23316 transitions. [2022-11-19 06:59:49,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-11-19 06:59:49,595 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:59:49,595 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 06:59:49,618 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9acd62b-0833-4c83-9481-13ff3c00e5f5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-19 06:59:49,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9acd62b-0833-4c83-9481-13ff3c00e5f5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-19 06:59:49,814 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:59:49,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:59:49,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1641028525, now seen corresponding path program 1 times [2022-11-19 06:59:49,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:59:49,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288954881] [2022-11-19 06:59:49,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:59:49,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:59:49,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:59:50,005 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 06:59:50,005 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:59:50,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288954881] [2022-11-19 06:59:50,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288954881] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:59:50,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985855588] [2022-11-19 06:59:50,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:59:50,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:59:50,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9acd62b-0833-4c83-9481-13ff3c00e5f5/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:59:50,008 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9acd62b-0833-4c83-9481-13ff3c00e5f5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:59:50,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9acd62b-0833-4c83-9481-13ff3c00e5f5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-19 06:59:50,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:59:50,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 1105 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 06:59:50,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:59:50,423 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-19 06:59:50,424 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:59:50,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985855588] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:59:50,424 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 06:59:50,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-19 06:59:50,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445113764] [2022-11-19 06:59:50,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:59:50,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:59:50,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:59:50,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:59:50,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 06:59:50,428 INFO L87 Difference]: Start difference. First operand 14880 states and 23316 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 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 06:59:54,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:59:54,712 INFO L93 Difference]: Finished difference Result 42969 states and 69821 transitions. [2022-11-19 06:59:54,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:59:54,713 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 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 144 [2022-11-19 06:59:54,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:59:54,877 INFO L225 Difference]: With dead ends: 42969 [2022-11-19 06:59:54,877 INFO L226 Difference]: Without dead ends: 28804 [2022-11-19 06:59:54,949 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 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 06:59:54,950 INFO L413 NwaCegarLoop]: 352 mSDtfsCounter, 362 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:59:54,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [362 Valid, 600 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 06:59:54,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28804 states. [2022-11-19 06:59:59,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28804 to 28720. [2022-11-19 06:59:59,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28720 states, 24342 states have (on average 1.5075589516062773) internal successors, (36697), 24452 states have internal predecessors, (36697), 3304 states have call successors, (3304), 1055 states have call predecessors, (3304), 1072 states have return successors, (5123), 3214 states have call predecessors, (5123), 3301 states have call successors, (5123) [2022-11-19 06:59:59,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28720 states to 28720 states and 45124 transitions. [2022-11-19 06:59:59,952 INFO L78 Accepts]: Start accepts. Automaton has 28720 states and 45124 transitions. Word has length 144 [2022-11-19 06:59:59,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:59:59,953 INFO L495 AbstractCegarLoop]: Abstraction has 28720 states and 45124 transitions. [2022-11-19 06:59:59,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 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 06:59:59,953 INFO L276 IsEmpty]: Start isEmpty. Operand 28720 states and 45124 transitions. [2022-11-19 06:59:59,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-11-19 06:59:59,996 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:59:59,996 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 07:00:00,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9acd62b-0833-4c83-9481-13ff3c00e5f5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-19 07:00:00,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9acd62b-0833-4c83-9481-13ff3c00e5f5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:00:00,205 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:00:00,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:00:00,205 INFO L85 PathProgramCache]: Analyzing trace with hash -729653803, now seen corresponding path program 1 times [2022-11-19 07:00:00,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:00:00,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703385935] [2022-11-19 07:00:00,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:00:00,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:00:00,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:00:00,380 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 07:00:00,380 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:00:00,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703385935] [2022-11-19 07:00:00,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703385935] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:00:00,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107579545] [2022-11-19 07:00:00,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:00:00,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:00:00,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9acd62b-0833-4c83-9481-13ff3c00e5f5/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:00:00,383 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9acd62b-0833-4c83-9481-13ff3c00e5f5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:00:00,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9acd62b-0833-4c83-9481-13ff3c00e5f5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-19 07:00:00,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:00:00,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 1099 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:00:00,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:00:00,947 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-19 07:00:00,948 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:00:00,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107579545] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:00:00,948 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:00:00,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-19 07:00:00,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732599761] [2022-11-19 07:00:00,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:00:00,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:00:00,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:00:00,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:00:00,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:00:00,951 INFO L87 Difference]: Start difference. First operand 28720 states and 45124 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 2 states have internal predecessors, (110), 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 07:00:09,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:00:09,968 INFO L93 Difference]: Finished difference Result 84249 states and 136573 transitions. [2022-11-19 07:00:09,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:00:09,969 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 2 states have internal predecessors, (110), 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 144 [2022-11-19 07:00:09,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:00:10,498 INFO L225 Difference]: With dead ends: 84249 [2022-11-19 07:00:10,498 INFO L226 Difference]: Without dead ends: 56244 [2022-11-19 07:00:10,619 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 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 07:00:10,620 INFO L413 NwaCegarLoop]: 352 mSDtfsCounter, 350 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:00:10,620 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [350 Valid, 600 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:00:10,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56244 states. [2022-11-19 07:00:19,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56244 to 56080. [2022-11-19 07:00:20,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56080 states, 47718 states have (on average 1.5067060647973511) internal successors, (71897), 47924 states have internal predecessors, (71897), 6328 states have call successors, (6328), 2015 states have call predecessors, (6328), 2032 states have return successors, (9811), 6142 states have call predecessors, (9811), 6325 states have call successors, (9811) [2022-11-19 07:00:20,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56080 states to 56080 states and 88036 transitions. [2022-11-19 07:00:20,226 INFO L78 Accepts]: Start accepts. Automaton has 56080 states and 88036 transitions. Word has length 144 [2022-11-19 07:00:20,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:00:20,226 INFO L495 AbstractCegarLoop]: Abstraction has 56080 states and 88036 transitions. [2022-11-19 07:00:20,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 2 states have internal predecessors, (110), 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 07:00:20,227 INFO L276 IsEmpty]: Start isEmpty. Operand 56080 states and 88036 transitions. [2022-11-19 07:00:20,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-11-19 07:00:20,551 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:00:20,552 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 07:00:20,568 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9acd62b-0833-4c83-9481-13ff3c00e5f5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-11-19 07:00:20,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9acd62b-0833-4c83-9481-13ff3c00e5f5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:00:20,768 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:00:20,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:00:20,769 INFO L85 PathProgramCache]: Analyzing trace with hash -810710441, now seen corresponding path program 1 times [2022-11-19 07:00:20,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:00:20,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581439316] [2022-11-19 07:00:20,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:00:20,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:00:20,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:00:20,949 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 07:00:20,950 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:00:20,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581439316] [2022-11-19 07:00:20,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581439316] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:00:20,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970852060] [2022-11-19 07:00:20,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:00:20,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:00:20,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9acd62b-0833-4c83-9481-13ff3c00e5f5/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:00:20,952 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9acd62b-0833-4c83-9481-13ff3c00e5f5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:00:20,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9acd62b-0833-4c83-9481-13ff3c00e5f5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-19 07:00:21,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:00:21,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 1093 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:00:21,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:00:21,375 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-19 07:00:21,375 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:00:21,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970852060] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:00:21,376 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:00:21,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-19 07:00:21,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744994499] [2022-11-19 07:00:21,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:00:21,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:00:21,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:00:21,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:00:21,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:00:21,379 INFO L87 Difference]: Start difference. First operand 56080 states and 88036 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 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)