./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.07.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f69433e-5e1a-4cfc-8914-5d2c091bc372/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f69433e-5e1a-4cfc-8914-5d2c091bc372/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_0f69433e-5e1a-4cfc-8914-5d2c091bc372/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f69433e-5e1a-4cfc-8914-5d2c091bc372/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.07.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f69433e-5e1a-4cfc-8914-5d2c091bc372/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_0f69433e-5e1a-4cfc-8914-5d2c091bc372/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 b395f094f2d3990354e9b2c1428e908d883c16492f3b21174dd87f3c0cfda780 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-19 07:02:57,440 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:02:57,442 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:02:57,477 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:02:57,478 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:02:57,479 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:02:57,480 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:02:57,484 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:02:57,492 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:02:57,498 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:02:57,499 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:02:57,502 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:02:57,503 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:02:57,506 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:02:57,510 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:02:57,511 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:02:57,512 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:02:57,512 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:02:57,514 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:02:57,516 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:02:57,517 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:02:57,518 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:02:57,520 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:02:57,520 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:02:57,524 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:02:57,524 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:02:57,524 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:02:57,525 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:02:57,526 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:02:57,526 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:02:57,527 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:02:57,527 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:02:57,528 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:02:57,529 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:02:57,530 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:02:57,537 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:02:57,538 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:02:57,538 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:02:57,538 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:02:57,539 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:02:57,540 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:02:57,541 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f69433e-5e1a-4cfc-8914-5d2c091bc372/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 07:02:57,589 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:02:57,589 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:02:57,590 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:02:57,590 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:02:57,591 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:02:57,591 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:02:57,591 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:02:57,592 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:02:57,592 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:02:57,592 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 07:02:57,593 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:02:57,593 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:02:57,593 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 07:02:57,594 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 07:02:57,594 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:02:57,594 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 07:02:57,594 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 07:02:57,594 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 07:02:57,595 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:02:57,595 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 07:02:57,595 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:02:57,596 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 07:02:57,596 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:02:57,596 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 07:02:57,596 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:02:57,596 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 07:02:57,596 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 07:02:57,598 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 07:02:57,598 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:02:57,598 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 07:02:57,599 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:02:57,599 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:02:57,600 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:02:57,600 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:02:57,600 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 07:02:57,600 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:02:57,600 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 07:02:57,601 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 07:02:57,601 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 07:02:57,601 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 07:02:57,601 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:02:57,601 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_0f69433e-5e1a-4cfc-8914-5d2c091bc372/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f69433e-5e1a-4cfc-8914-5d2c091bc372/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b395f094f2d3990354e9b2c1428e908d883c16492f3b21174dd87f3c0cfda780 [2022-11-19 07:02:57,885 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:02:57,914 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:02:57,917 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:02:57,918 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:02:57,919 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:02:57,920 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f69433e-5e1a-4cfc-8914-5d2c091bc372/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.07.cil-1.c [2022-11-19 07:02:58,003 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f69433e-5e1a-4cfc-8914-5d2c091bc372/bin/utaipan-I9t0OCRTmS/data/9079e6ef6/c6ce3372f5204f5abfc91418decef1c8/FLAGc29eaeb12 [2022-11-19 07:02:58,519 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:02:58,519 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f69433e-5e1a-4cfc-8914-5d2c091bc372/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.07.cil-1.c [2022-11-19 07:02:58,532 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f69433e-5e1a-4cfc-8914-5d2c091bc372/bin/utaipan-I9t0OCRTmS/data/9079e6ef6/c6ce3372f5204f5abfc91418decef1c8/FLAGc29eaeb12 [2022-11-19 07:02:58,862 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f69433e-5e1a-4cfc-8914-5d2c091bc372/bin/utaipan-I9t0OCRTmS/data/9079e6ef6/c6ce3372f5204f5abfc91418decef1c8 [2022-11-19 07:02:58,865 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:02:58,866 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:02:58,872 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:02:58,872 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:02:58,876 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:02:58,876 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:02:58" (1/1) ... [2022-11-19 07:02:58,878 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@367eb13d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:02:58, skipping insertion in model container [2022-11-19 07:02:58,879 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:02:58" (1/1) ... [2022-11-19 07:02:58,887 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:02:58,953 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:02:59,195 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_0f69433e-5e1a-4cfc-8914-5d2c091bc372/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.07.cil-1.c[914,927] [2022-11-19 07:02:59,244 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_0f69433e-5e1a-4cfc-8914-5d2c091bc372/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.07.cil-1.c[7115,7128] [2022-11-19 07:02:59,315 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:02:59,325 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:02:59,337 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_0f69433e-5e1a-4cfc-8914-5d2c091bc372/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.07.cil-1.c[914,927] [2022-11-19 07:02:59,365 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_0f69433e-5e1a-4cfc-8914-5d2c091bc372/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.07.cil-1.c[7115,7128] [2022-11-19 07:02:59,404 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:02:59,432 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:02:59,432 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:02:59 WrapperNode [2022-11-19 07:02:59,433 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:02:59,434 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:02:59,434 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:02:59,434 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:02:59,442 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:02:59" (1/1) ... [2022-11-19 07:02:59,454 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:02:59" (1/1) ... [2022-11-19 07:02:59,500 INFO L138 Inliner]: procedures = 67, calls = 78, calls flagged for inlining = 36, calls inlined = 36, statements flattened = 750 [2022-11-19 07:02:59,500 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:02:59,501 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:02:59,501 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:02:59,501 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:02:59,526 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:02:59" (1/1) ... [2022-11-19 07:02:59,527 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:02:59" (1/1) ... [2022-11-19 07:02:59,538 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:02:59" (1/1) ... [2022-11-19 07:02:59,540 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:02:59" (1/1) ... [2022-11-19 07:02:59,552 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:02:59" (1/1) ... [2022-11-19 07:02:59,577 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:02:59" (1/1) ... [2022-11-19 07:02:59,590 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:02:59" (1/1) ... [2022-11-19 07:02:59,599 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:02:59" (1/1) ... [2022-11-19 07:02:59,603 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:02:59,606 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:02:59,607 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:02:59,607 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:02:59,608 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:02:59" (1/1) ... [2022-11-19 07:02:59,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:02:59,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f69433e-5e1a-4cfc-8914-5d2c091bc372/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:02:59,648 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f69433e-5e1a-4cfc-8914-5d2c091bc372/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:02:59,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f69433e-5e1a-4cfc-8914-5d2c091bc372/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:02:59,692 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:02:59,693 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-19 07:02:59,693 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-19 07:02:59,693 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2022-11-19 07:02:59,693 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2022-11-19 07:02:59,693 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-11-19 07:02:59,693 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-11-19 07:02:59,693 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-11-19 07:02:59,693 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-11-19 07:02:59,694 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2022-11-19 07:02:59,694 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2022-11-19 07:02:59,694 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-11-19 07:02:59,694 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-11-19 07:02:59,695 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-11-19 07:02:59,695 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-11-19 07:02:59,695 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2022-11-19 07:02:59,695 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2022-11-19 07:02:59,695 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2022-11-19 07:02:59,695 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2022-11-19 07:02:59,695 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2022-11-19 07:02:59,696 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2022-11-19 07:02:59,696 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-11-19 07:02:59,696 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-11-19 07:02:59,696 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 07:02:59,697 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-11-19 07:02:59,697 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-11-19 07:02:59,697 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2022-11-19 07:02:59,697 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2022-11-19 07:02:59,697 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:02:59,697 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:02:59,697 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-11-19 07:02:59,698 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-11-19 07:02:59,856 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:02:59,858 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:03:00,775 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:03:01,271 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:03:01,271 INFO L300 CfgBuilder]: Removed 14 assume(true) statements. [2022-11-19 07:03:01,275 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:03:01 BoogieIcfgContainer [2022-11-19 07:03:01,275 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:03:01,279 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:03:01,279 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:03:01,283 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:03:01,283 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:02:58" (1/3) ... [2022-11-19 07:03:01,284 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78b2c0d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:03:01, skipping insertion in model container [2022-11-19 07:03:01,285 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:02:59" (2/3) ... [2022-11-19 07:03:01,285 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78b2c0d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:03:01, skipping insertion in model container [2022-11-19 07:03:01,285 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:03:01" (3/3) ... [2022-11-19 07:03:01,287 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.07.cil-1.c [2022-11-19 07:03:01,310 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:03:01,310 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-19 07:03:01,387 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:03:01,396 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;@110a5330, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:03:01,397 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-19 07:03:01,403 INFO L276 IsEmpty]: Start isEmpty. Operand has 205 states, 153 states have (on average 1.522875816993464) internal successors, (233), 159 states have internal predecessors, (233), 35 states have call successors, (35), 14 states have call predecessors, (35), 14 states have return successors, (35), 34 states have call predecessors, (35), 35 states have call successors, (35) [2022-11-19 07:03:01,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-19 07:03:01,419 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:03:01,419 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 07:03:01,420 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:03:01,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:03:01,426 INFO L85 PathProgramCache]: Analyzing trace with hash -828462110, now seen corresponding path program 1 times [2022-11-19 07:03:01,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:03:01,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711030202] [2022-11-19 07:03:01,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:03:01,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:03:01,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:03:01,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:03:01,966 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:03:01,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711030202] [2022-11-19 07:03:01,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711030202] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:03:01,967 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:03:01,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 07:03:01,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255847821] [2022-11-19 07:03:01,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:03:01,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:03:01,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:03:02,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:03:02,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:03:02,019 INFO L87 Difference]: Start difference. First operand has 205 states, 153 states have (on average 1.522875816993464) internal successors, (233), 159 states have internal predecessors, (233), 35 states have call successors, (35), 14 states have call predecessors, (35), 14 states have return successors, (35), 34 states have call predecessors, (35), 35 states have call successors, (35) 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 07:03:03,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:03:03,130 INFO L93 Difference]: Finished difference Result 830 states and 1204 transitions. [2022-11-19 07:03:03,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 07:03:03,133 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 07:03:03,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:03:03,159 INFO L225 Difference]: With dead ends: 830 [2022-11-19 07:03:03,160 INFO L226 Difference]: Without dead ends: 611 [2022-11-19 07:03:03,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-19 07:03:03,174 INFO L413 NwaCegarLoop]: 402 mSDtfsCounter, 909 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 672 mSolverCounterSat, 335 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 918 SdHoareTripleChecker+Valid, 1015 SdHoareTripleChecker+Invalid, 1007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 335 IncrementalHoareTripleChecker+Valid, 672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-19 07:03:03,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [918 Valid, 1015 Invalid, 1007 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [335 Valid, 672 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-19 07:03:03,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2022-11-19 07:03:03,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 540. [2022-11-19 07:03:03,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 387 states have (on average 1.3385012919896642) internal successors, (518), 391 states have internal predecessors, (518), 90 states have call successors, (90), 62 states have call predecessors, (90), 61 states have return successors, (103), 88 states have call predecessors, (103), 88 states have call successors, (103) [2022-11-19 07:03:03,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 711 transitions. [2022-11-19 07:03:03,339 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 711 transitions. Word has length 45 [2022-11-19 07:03:03,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:03:03,339 INFO L495 AbstractCegarLoop]: Abstraction has 540 states and 711 transitions. [2022-11-19 07:03:03,340 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 07:03:03,340 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 711 transitions. [2022-11-19 07:03:03,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-19 07:03:03,348 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:03:03,348 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 07:03:03,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 07:03:03,349 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:03:03,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:03:03,349 INFO L85 PathProgramCache]: Analyzing trace with hash -2107454651, now seen corresponding path program 1 times [2022-11-19 07:03:03,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:03:03,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080734822] [2022-11-19 07:03:03,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:03:03,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:03:03,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:03:03,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:03:03,713 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:03:03,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080734822] [2022-11-19 07:03:03,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080734822] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:03:03,713 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:03:03,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-19 07:03:03,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303028150] [2022-11-19 07:03:03,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:03:03,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 07:03:03,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:03:03,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 07:03:03,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-19 07:03:03,716 INFO L87 Difference]: Start difference. First operand 540 states and 711 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 07:03:04,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:03:04,609 INFO L93 Difference]: Finished difference Result 1301 states and 1658 transitions. [2022-11-19 07:03:04,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-19 07:03:04,610 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 07:03:04,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:03:04,615 INFO L225 Difference]: With dead ends: 1301 [2022-11-19 07:03:04,615 INFO L226 Difference]: Without dead ends: 898 [2022-11-19 07:03:04,617 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 07:03:04,618 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 426 mSDsluCounter, 687 mSDsCounter, 0 mSdLazyCounter, 857 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 851 SdHoareTripleChecker+Invalid, 960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 857 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:03:04,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [453 Valid, 851 Invalid, 960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 857 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 07:03:04,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2022-11-19 07:03:04,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 869. [2022-11-19 07:03:04,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 610 states have (on average 1.2934426229508196) internal successors, (789), 615 states have internal predecessors, (789), 146 states have call successors, (146), 110 states have call predecessors, (146), 111 states have return successors, (177), 145 states have call predecessors, (177), 144 states have call successors, (177) [2022-11-19 07:03:04,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 1112 transitions. [2022-11-19 07:03:04,722 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 1112 transitions. Word has length 46 [2022-11-19 07:03:04,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:03:04,723 INFO L495 AbstractCegarLoop]: Abstraction has 869 states and 1112 transitions. [2022-11-19 07:03:04,723 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 07:03:04,723 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 1112 transitions. [2022-11-19 07:03:04,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-19 07:03:04,725 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:03:04,725 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 07:03:04,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 07:03:04,726 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:03:04,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:03:04,726 INFO L85 PathProgramCache]: Analyzing trace with hash -223685774, now seen corresponding path program 1 times [2022-11-19 07:03:04,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:03:04,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389472385] [2022-11-19 07:03:04,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:03:04,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:03:04,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:03:04,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:03:04,790 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:03:04,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389472385] [2022-11-19 07:03:04,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389472385] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:03:04,792 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:03:04,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:03:04,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968924039] [2022-11-19 07:03:04,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:03:04,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:03:04,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:03:04,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:03:04,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:03:04,795 INFO L87 Difference]: Start difference. First operand 869 states and 1112 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 07:03:05,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:03:05,003 INFO L93 Difference]: Finished difference Result 1810 states and 2271 transitions. [2022-11-19 07:03:05,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:03:05,004 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 07:03:05,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:03:05,012 INFO L225 Difference]: With dead ends: 1810 [2022-11-19 07:03:05,013 INFO L226 Difference]: Without dead ends: 1128 [2022-11-19 07:03:05,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:03:05,022 INFO L413 NwaCegarLoop]: 254 mSDtfsCounter, 68 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:03:05,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 473 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:03:05,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1128 states. [2022-11-19 07:03:05,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1128 to 1106. [2022-11-19 07:03:05,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1106 states, 771 states have (on average 1.2749675745784694) internal successors, (983), 776 states have internal predecessors, (983), 188 states have call successors, (188), 148 states have call predecessors, (188), 145 states have return successors, (223), 183 states have call predecessors, (223), 186 states have call successors, (223) [2022-11-19 07:03:05,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1106 states to 1106 states and 1394 transitions. [2022-11-19 07:03:05,178 INFO L78 Accepts]: Start accepts. Automaton has 1106 states and 1394 transitions. Word has length 47 [2022-11-19 07:03:05,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:03:05,178 INFO L495 AbstractCegarLoop]: Abstraction has 1106 states and 1394 transitions. [2022-11-19 07:03:05,179 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 07:03:05,179 INFO L276 IsEmpty]: Start isEmpty. Operand 1106 states and 1394 transitions. [2022-11-19 07:03:05,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-19 07:03:05,182 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:03:05,182 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 07:03:05,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 07:03:05,183 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:03:05,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:03:05,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1556248517, now seen corresponding path program 1 times [2022-11-19 07:03:05,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:03:05,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405762587] [2022-11-19 07:03:05,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:03:05,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:03:05,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:03:05,253 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 07:03:05,254 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:03:05,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405762587] [2022-11-19 07:03:05,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405762587] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:03:05,254 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:03:05,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:03:05,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091619930] [2022-11-19 07:03:05,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:03:05,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:03:05,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:03:05,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:03:05,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:03:05,256 INFO L87 Difference]: Start difference. First operand 1106 states and 1394 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 07:03:05,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:03:05,424 INFO L93 Difference]: Finished difference Result 1512 states and 1884 transitions. [2022-11-19 07:03:05,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:03:05,424 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 07:03:05,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:03:05,430 INFO L225 Difference]: With dead ends: 1512 [2022-11-19 07:03:05,431 INFO L226 Difference]: Without dead ends: 957 [2022-11-19 07:03:05,432 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:03:05,440 INFO L413 NwaCegarLoop]: 252 mSDtfsCounter, 257 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:03:05,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 314 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:03:05,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2022-11-19 07:03:05,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 751. [2022-11-19 07:03:05,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 751 states, 535 states have (on average 1.2710280373831775) internal successors, (680), 539 states have internal predecessors, (680), 125 states have call successors, (125), 94 states have call predecessors, (125), 89 states have return successors, (131), 119 states have call predecessors, (131), 123 states have call successors, (131) [2022-11-19 07:03:05,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 936 transitions. [2022-11-19 07:03:05,527 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 936 transitions. Word has length 53 [2022-11-19 07:03:05,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:03:05,528 INFO L495 AbstractCegarLoop]: Abstraction has 751 states and 936 transitions. [2022-11-19 07:03:05,529 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 07:03:05,529 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 936 transitions. [2022-11-19 07:03:05,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-19 07:03:05,530 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:03:05,531 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 07:03:05,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 07:03:05,536 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:03:05,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:03:05,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1834653725, now seen corresponding path program 1 times [2022-11-19 07:03:05,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:03:05,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179964589] [2022-11-19 07:03:05,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:03:05,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:03:05,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:03:05,680 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 07:03:05,681 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:03:05,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179964589] [2022-11-19 07:03:05,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179964589] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:03:05,682 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:03:05,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:03:05,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162226625] [2022-11-19 07:03:05,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:03:05,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:03:05,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:03:05,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:03:05,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:03:05,684 INFO L87 Difference]: Start difference. First operand 751 states and 936 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 07:03:06,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:03:06,043 INFO L93 Difference]: Finished difference Result 1006 states and 1237 transitions. [2022-11-19 07:03:06,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:03:06,044 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 07:03:06,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:03:06,049 INFO L225 Difference]: With dead ends: 1006 [2022-11-19 07:03:06,049 INFO L226 Difference]: Without dead ends: 1003 [2022-11-19 07:03:06,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:03:06,051 INFO L413 NwaCegarLoop]: 250 mSDtfsCounter, 473 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 473 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:03:06,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [473 Valid, 293 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:03:06,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1003 states. [2022-11-19 07:03:06,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1003 to 750. [2022-11-19 07:03:06,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 750 states, 535 states have (on average 1.2598130841121495) internal successors, (674), 538 states have internal predecessors, (674), 124 states have call successors, (124), 94 states have call predecessors, (124), 89 states have return successors, (131), 119 states have call predecessors, (131), 123 states have call successors, (131) [2022-11-19 07:03:06,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 929 transitions. [2022-11-19 07:03:06,146 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 929 transitions. Word has length 54 [2022-11-19 07:03:06,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:03:06,147 INFO L495 AbstractCegarLoop]: Abstraction has 750 states and 929 transitions. [2022-11-19 07:03:06,147 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 07:03:06,147 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 929 transitions. [2022-11-19 07:03:06,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-19 07:03:06,148 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:03:06,148 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:03:06,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-19 07:03:06,149 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:03:06,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:03:06,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1361671707, now seen corresponding path program 1 times [2022-11-19 07:03:06,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:03:06,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371030113] [2022-11-19 07:03:06,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:03:06,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:03:06,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:03:06,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:03:06,264 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:03:06,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371030113] [2022-11-19 07:03:06,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371030113] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:03:06,264 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:03:06,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 07:03:06,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790432578] [2022-11-19 07:03:06,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:03:06,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:03:06,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:03:06,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:03:06,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:03:06,266 INFO L87 Difference]: Start difference. First operand 750 states and 929 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-19 07:03:07,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:03:07,073 INFO L93 Difference]: Finished difference Result 1353 states and 1903 transitions. [2022-11-19 07:03:07,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:03:07,074 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 52 [2022-11-19 07:03:07,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:03:07,080 INFO L225 Difference]: With dead ends: 1353 [2022-11-19 07:03:07,081 INFO L226 Difference]: Without dead ends: 1227 [2022-11-19 07:03:07,082 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 07:03:07,083 INFO L413 NwaCegarLoop]: 435 mSDtfsCounter, 983 mSDsluCounter, 559 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 995 SdHoareTripleChecker+Valid, 994 SdHoareTripleChecker+Invalid, 738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:03:07,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [995 Valid, 994 Invalid, 738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 497 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 07:03:07,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1227 states. [2022-11-19 07:03:07,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1227 to 1216. [2022-11-19 07:03:07,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1216 states, 912 states have (on average 1.355263157894737) internal successors, (1236), 918 states have internal predecessors, (1236), 189 states have call successors, (189), 118 states have call predecessors, (189), 113 states have return successors, (238), 181 states have call predecessors, (238), 188 states have call successors, (238) [2022-11-19 07:03:07,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1216 states to 1216 states and 1663 transitions. [2022-11-19 07:03:07,221 INFO L78 Accepts]: Start accepts. Automaton has 1216 states and 1663 transitions. Word has length 52 [2022-11-19 07:03:07,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:03:07,221 INFO L495 AbstractCegarLoop]: Abstraction has 1216 states and 1663 transitions. [2022-11-19 07:03:07,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-19 07:03:07,222 INFO L276 IsEmpty]: Start isEmpty. Operand 1216 states and 1663 transitions. [2022-11-19 07:03:07,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-19 07:03:07,223 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:03:07,223 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 07:03:07,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-19 07:03:07,223 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:03:07,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:03:07,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1040757541, now seen corresponding path program 1 times [2022-11-19 07:03:07,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:03:07,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49581756] [2022-11-19 07:03:07,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:03:07,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:03:07,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:03:07,383 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 07:03:07,383 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:03:07,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49581756] [2022-11-19 07:03:07,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49581756] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:03:07,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445195000] [2022-11-19 07:03:07,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:03:07,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:03:07,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f69433e-5e1a-4cfc-8914-5d2c091bc372/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:03:07,390 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f69433e-5e1a-4cfc-8914-5d2c091bc372/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:03:07,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f69433e-5e1a-4cfc-8914-5d2c091bc372/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 07:03:07,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:03:07,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 07:03:07,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:03:07,900 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 07:03:07,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:03:08,088 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 07:03:08,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445195000] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:03:08,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [198464700] [2022-11-19 07:03:08,114 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2022-11-19 07:03:08,114 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:03:08,119 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:03:08,125 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:03:08,125 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:03:11,865 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 155 for LOIs [2022-11-19 07:03:11,896 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 151 for LOIs [2022-11-19 07:03:11,923 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 159 for LOIs [2022-11-19 07:03:12,605 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 155 for LOIs [2022-11-19 07:03:12,679 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 155 for LOIs [2022-11-19 07:03:12,751 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 155 for LOIs [2022-11-19 07:03:12,802 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 162 for LOIs [2022-11-19 07:03:12,839 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:03:29,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [198464700] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:03:29,767 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:03:29,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [5, 5, 4] total 41 [2022-11-19 07:03:29,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85965003] [2022-11-19 07:03:29,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:03:29,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-19 07:03:29,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:03:29,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-19 07:03:29,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1447, Unknown=0, NotChecked=0, Total=1640 [2022-11-19 07:03:29,771 INFO L87 Difference]: Start difference. First operand 1216 states and 1663 transitions. Second operand has 36 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-19 07:04:01,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:04:01,603 INFO L93 Difference]: Finished difference Result 1877 states and 2437 transitions. [2022-11-19 07:04:01,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-19 07:04:01,606 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 55 [2022-11-19 07:04:01,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:04:01,613 INFO L225 Difference]: With dead ends: 1877 [2022-11-19 07:04:01,614 INFO L226 Difference]: Without dead ends: 1264 [2022-11-19 07:04:01,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 124 SyntacticMatches, 5 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1432 ImplicationChecksByTransitivity, 37.6s TimeCoverageRelationStatistics Valid=601, Invalid=4091, Unknown=0, NotChecked=0, Total=4692 [2022-11-19 07:04:01,621 INFO L413 NwaCegarLoop]: 222 mSDtfsCounter, 153 mSDsluCounter, 2268 mSDsCounter, 0 mSdLazyCounter, 5443 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 2490 SdHoareTripleChecker+Invalid, 5586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 5443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.8s IncrementalHoareTripleChecker+Time [2022-11-19 07:04:01,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 2490 Invalid, 5586 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [143 Valid, 5443 Invalid, 0 Unknown, 0 Unchecked, 10.8s Time] [2022-11-19 07:04:01,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1264 states. [2022-11-19 07:04:01,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1264 to 1249. [2022-11-19 07:04:01,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1249 states, 937 states have (on average 1.3468516542155817) internal successors, (1262), 943 states have internal predecessors, (1262), 191 states have call successors, (191), 124 states have call predecessors, (191), 119 states have return successors, (240), 183 states have call predecessors, (240), 190 states have call successors, (240) [2022-11-19 07:04:01,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1249 states to 1249 states and 1693 transitions. [2022-11-19 07:04:01,787 INFO L78 Accepts]: Start accepts. Automaton has 1249 states and 1693 transitions. Word has length 55 [2022-11-19 07:04:01,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:04:01,788 INFO L495 AbstractCegarLoop]: Abstraction has 1249 states and 1693 transitions. [2022-11-19 07:04:01,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-19 07:04:01,789 INFO L276 IsEmpty]: Start isEmpty. Operand 1249 states and 1693 transitions. [2022-11-19 07:04:01,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-19 07:04:01,790 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:04:01,791 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 07:04:01,800 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f69433e-5e1a-4cfc-8914-5d2c091bc372/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-19 07:04:01,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f69433e-5e1a-4cfc-8914-5d2c091bc372/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:04:01,997 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:04:01,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:04:01,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1764559944, now seen corresponding path program 1 times [2022-11-19 07:04:01,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:04:01,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651220896] [2022-11-19 07:04:01,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:04:01,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:04:02,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:04:02,080 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:04:02,080 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:04:02,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651220896] [2022-11-19 07:04:02,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651220896] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:04:02,081 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:04:02,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:04:02,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565563810] [2022-11-19 07:04:02,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:04:02,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:04:02,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:04:02,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:04:02,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:04:02,083 INFO L87 Difference]: Start difference. First operand 1249 states and 1693 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 07:04:02,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:04:02,367 INFO L93 Difference]: Finished difference Result 1831 states and 2376 transitions. [2022-11-19 07:04:02,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:04:02,368 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 07:04:02,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:04:02,377 INFO L225 Difference]: With dead ends: 1831 [2022-11-19 07:04:02,377 INFO L226 Difference]: Without dead ends: 1458 [2022-11-19 07:04:02,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:04:02,380 INFO L413 NwaCegarLoop]: 276 mSDtfsCounter, 43 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:04:02,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 510 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:04:02,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1458 states. [2022-11-19 07:04:02,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1458 to 1370. [2022-11-19 07:04:02,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1370 states, 1018 states have (on average 1.331041257367387) internal successors, (1355), 1028 states have internal predecessors, (1355), 213 states have call successors, (213), 146 states have call predecessors, (213), 137 states have return successors, (262), 197 states have call predecessors, (262), 212 states have call successors, (262) [2022-11-19 07:04:02,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1370 states to 1370 states and 1830 transitions. [2022-11-19 07:04:02,569 INFO L78 Accepts]: Start accepts. Automaton has 1370 states and 1830 transitions. Word has length 61 [2022-11-19 07:04:02,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:04:02,570 INFO L495 AbstractCegarLoop]: Abstraction has 1370 states and 1830 transitions. [2022-11-19 07:04:02,570 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 07:04:02,570 INFO L276 IsEmpty]: Start isEmpty. Operand 1370 states and 1830 transitions. [2022-11-19 07:04:02,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-19 07:04:02,571 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:04:02,572 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:04:02,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-19 07:04:02,572 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:04:02,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:04:02,572 INFO L85 PathProgramCache]: Analyzing trace with hash -543402847, now seen corresponding path program 1 times [2022-11-19 07:04:02,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:04:02,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537102489] [2022-11-19 07:04:02,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:04:02,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:04:02,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:04:02,793 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 07:04:02,794 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:04:02,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537102489] [2022-11-19 07:04:02,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537102489] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:04:02,794 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:04:02,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-19 07:04:02,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791811363] [2022-11-19 07:04:02,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:04:02,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 07:04:02,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:04:02,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 07:04:02,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-19 07:04:02,796 INFO L87 Difference]: Start difference. First operand 1370 states and 1830 transitions. Second operand has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 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 07:04:03,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:04:03,674 INFO L93 Difference]: Finished difference Result 2367 states and 2990 transitions. [2022-11-19 07:04:03,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-19 07:04:03,675 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 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 63 [2022-11-19 07:04:03,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:04:03,686 INFO L225 Difference]: With dead ends: 2367 [2022-11-19 07:04:03,686 INFO L226 Difference]: Without dead ends: 1681 [2022-11-19 07:04:03,690 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 07:04:03,692 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 404 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 766 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 429 SdHoareTripleChecker+Valid, 714 SdHoareTripleChecker+Invalid, 867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 766 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:04:03,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [429 Valid, 714 Invalid, 867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 766 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 07:04:03,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1681 states. [2022-11-19 07:04:03,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1681 to 1550. [2022-11-19 07:04:03,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1550 states, 1138 states have (on average 1.3040421792618628) internal successors, (1484), 1148 states have internal predecessors, (1484), 245 states have call successors, (245), 174 states have call predecessors, (245), 165 states have return successors, (294), 229 states have call predecessors, (294), 244 states have call successors, (294) [2022-11-19 07:04:03,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1550 states to 1550 states and 2023 transitions. [2022-11-19 07:04:03,944 INFO L78 Accepts]: Start accepts. Automaton has 1550 states and 2023 transitions. Word has length 63 [2022-11-19 07:04:03,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:04:03,945 INFO L495 AbstractCegarLoop]: Abstraction has 1550 states and 2023 transitions. [2022-11-19 07:04:03,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 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 07:04:03,945 INFO L276 IsEmpty]: Start isEmpty. Operand 1550 states and 2023 transitions. [2022-11-19 07:04:03,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-19 07:04:03,946 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:04:03,947 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:04:03,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-19 07:04:03,947 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:04:03,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:04:03,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1355168719, now seen corresponding path program 1 times [2022-11-19 07:04:03,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:04:03,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088408385] [2022-11-19 07:04:03,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:04:03,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:04:03,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:04:04,096 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 07:04:04,097 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:04:04,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088408385] [2022-11-19 07:04:04,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088408385] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:04:04,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904143057] [2022-11-19 07:04:04,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:04:04,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:04:04,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f69433e-5e1a-4cfc-8914-5d2c091bc372/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:04:04,099 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f69433e-5e1a-4cfc-8914-5d2c091bc372/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:04:04,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f69433e-5e1a-4cfc-8914-5d2c091bc372/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 07:04:04,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:04:04,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 07:04:04,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:04:04,479 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:04:04,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:04:04,664 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 07:04:04,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904143057] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:04:04,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1773051084] [2022-11-19 07:04:04,669 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2022-11-19 07:04:04,669 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:04:04,669 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:04:04,670 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:04:04,670 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:04:12,914 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 155 for LOIs [2022-11-19 07:04:12,938 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 223 for LOIs [2022-11-19 07:04:12,998 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 217 for LOIs [2022-11-19 07:04:13,064 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 159 for LOIs [2022-11-19 07:04:13,506 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 155 for LOIs [2022-11-19 07:04:13,567 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 155 for LOIs [2022-11-19 07:04:13,644 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 155 for LOIs [2022-11-19 07:04:13,671 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 162 for LOIs [2022-11-19 07:04:13,695 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:04:46,252 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '35209#(and (= ~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) (= ~t7_i~0 0) (= ~t1_pc~0 0) (= 0 ~t7_pc~0) (= ~T4_E~0 2) (= ~E_7~0 2) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~T5_E~0 2) (<= 0 ~p_dw_pc~0) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (= 0 ~t6_pc~0) (= 0 ~t5_st~0) (= ~E_3~0 2) (= 0 ~t6_st~0) (= ~t2_i~0 0) (= ~E_6~0 2) (= ~t4_i~0 0) (= ~c_num_read~0 1) (= ~T7_E~0 2) (= ~m_i~0 0) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~E_2~0 2) (= ~c_last_read~0 ~q_buf_0~0) (= ~T3_E~0 2) (= ~local~0 0) (= ~t3_i~0 0) (= 0 ~t7_st~0) (= ~token~0 0) (= ~c_dr_pc~0 0) (= ~m_pc~0 0) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (<= ~E_5~0 2) (<= ~m_st~0 0) (<= ~t3_pc~0 0) (= |#NULL.offset| 0) (= ~c_last_read~0 ~p_last_write~0) (= ~E_M~0 2) (= ~a_t~0 0) (<= 0 ~t3_pc~0) (= 0 ~t2_st~0) (<= 2 ~E_5~0) (<= 0 ~m_st~0) (<= ~t4_pc~0 0) (= ~E_1~0 2) (= 0 ~t3_st~0) (<= 0 ~t4_pc~0) (= ~M_E~0 2) (<= ~t1_st~0 0) (<= 0 |#StackHeapBarrier|) (= ~c_dr_st~0 1) (<= 0 ~t1_st~0) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-11-19 07:04:46,252 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:04:46,252 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:04:46,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2022-11-19 07:04:46,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294771883] [2022-11-19 07:04:46,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:04:46,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 07:04:46,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:04:46,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 07:04:46,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=1924, Unknown=0, NotChecked=0, Total=2162 [2022-11-19 07:04:46,255 INFO L87 Difference]: Start difference. First operand 1550 states and 2023 transitions. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 6 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) [2022-11-19 07:04:47,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:04:47,212 INFO L93 Difference]: Finished difference Result 3757 states and 4552 transitions. [2022-11-19 07:04:47,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 07:04:47,213 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 6 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) Word has length 64 [2022-11-19 07:04:47,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:04:47,228 INFO L225 Difference]: With dead ends: 3757 [2022-11-19 07:04:47,229 INFO L226 Difference]: Without dead ends: 3754 [2022-11-19 07:04:47,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 144 SyntacticMatches, 6 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1043 ImplicationChecksByTransitivity, 32.6s TimeCoverageRelationStatistics Valid=238, Invalid=1924, Unknown=0, NotChecked=0, Total=2162 [2022-11-19 07:04:47,232 INFO L413 NwaCegarLoop]: 364 mSDtfsCounter, 509 mSDsluCounter, 611 mSDsCounter, 0 mSdLazyCounter, 541 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 509 SdHoareTripleChecker+Valid, 975 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:04:47,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [509 Valid, 975 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 541 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 07:04:47,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3754 states. [2022-11-19 07:04:47,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3754 to 2865. [2022-11-19 07:04:47,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2865 states, 2030 states have (on average 1.2443349753694581) internal successors, (2526), 2048 states have internal predecessors, (2526), 472 states have call successors, (472), 378 states have call predecessors, (472), 361 states have return successors, (533), 440 states have call predecessors, (533), 471 states have call successors, (533) [2022-11-19 07:04:47,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2865 states to 2865 states and 3531 transitions. [2022-11-19 07:04:47,675 INFO L78 Accepts]: Start accepts. Automaton has 2865 states and 3531 transitions. Word has length 64 [2022-11-19 07:04:47,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:04:47,677 INFO L495 AbstractCegarLoop]: Abstraction has 2865 states and 3531 transitions. [2022-11-19 07:04:47,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 6 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) [2022-11-19 07:04:47,677 INFO L276 IsEmpty]: Start isEmpty. Operand 2865 states and 3531 transitions. [2022-11-19 07:04:47,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-19 07:04:47,685 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:04:47,685 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-19 07:04:47,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f69433e-5e1a-4cfc-8914-5d2c091bc372/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 07:04:47,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f69433e-5e1a-4cfc-8914-5d2c091bc372/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-19 07:04:47,891 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:04:47,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:04:47,891 INFO L85 PathProgramCache]: Analyzing trace with hash 804350377, now seen corresponding path program 2 times [2022-11-19 07:04:47,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:04:47,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443254219] [2022-11-19 07:04:47,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:04:47,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:04:47,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:04:47,927 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 07:04:47,927 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:04:47,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443254219] [2022-11-19 07:04:47,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443254219] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:04:47,927 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:04:47,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:04:47,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092327824] [2022-11-19 07:04:47,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:04:47,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:04:47,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:04:47,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:04:47,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:04:47,929 INFO L87 Difference]: Start difference. First operand 2865 states and 3531 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-19 07:04:48,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:04:48,338 INFO L93 Difference]: Finished difference Result 4061 states and 4903 transitions. [2022-11-19 07:04:48,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:04:48,339 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 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 67 [2022-11-19 07:04:48,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:04:48,348 INFO L225 Difference]: With dead ends: 4061 [2022-11-19 07:04:48,348 INFO L226 Difference]: Without dead ends: 2123 [2022-11-19 07:04:48,352 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:04:48,353 INFO L413 NwaCegarLoop]: 285 mSDtfsCounter, 262 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:04:48,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [262 Valid, 352 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:04:48,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2123 states. [2022-11-19 07:04:48,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2123 to 2107. [2022-11-19 07:04:48,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2107 states, 1524 states have (on average 1.2591863517060367) internal successors, (1919), 1534 states have internal predecessors, (1919), 336 states have call successors, (336), 254 states have call predecessors, (336), 245 states have return successors, (389), 320 states have call predecessors, (389), 335 states have call successors, (389) [2022-11-19 07:04:48,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2107 states to 2107 states and 2644 transitions. [2022-11-19 07:04:48,660 INFO L78 Accepts]: Start accepts. Automaton has 2107 states and 2644 transitions. Word has length 67 [2022-11-19 07:04:48,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:04:48,660 INFO L495 AbstractCegarLoop]: Abstraction has 2107 states and 2644 transitions. [2022-11-19 07:04:48,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-19 07:04:48,661 INFO L276 IsEmpty]: Start isEmpty. Operand 2107 states and 2644 transitions. [2022-11-19 07:04:48,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-19 07:04:48,663 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:04:48,663 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 07:04:48,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-19 07:04:48,664 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:04:48,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:04:48,664 INFO L85 PathProgramCache]: Analyzing trace with hash 729881269, now seen corresponding path program 1 times [2022-11-19 07:04:48,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:04:48,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512373181] [2022-11-19 07:04:48,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:04:48,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:04:48,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:04:48,717 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 07:04:48,717 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:04:48,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512373181] [2022-11-19 07:04:48,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512373181] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:04:48,718 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:04:48,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:04:48,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247730763] [2022-11-19 07:04:48,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:04:48,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:04:48,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:04:48,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:04:48,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:04:48,720 INFO L87 Difference]: Start difference. First operand 2107 states and 2644 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 07:04:49,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:04:49,130 INFO L93 Difference]: Finished difference Result 3704 states and 4472 transitions. [2022-11-19 07:04:49,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:04:49,131 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 07:04:49,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:04:49,142 INFO L225 Difference]: With dead ends: 3704 [2022-11-19 07:04:49,142 INFO L226 Difference]: Without dead ends: 2325 [2022-11-19 07:04:49,146 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:04:49,147 INFO L413 NwaCegarLoop]: 269 mSDtfsCounter, 38 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:04:49,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 503 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:04:49,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2325 states. [2022-11-19 07:04:49,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2325 to 2244. [2022-11-19 07:04:49,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2244 states, 1621 states have (on average 1.2529302899444787) internal successors, (2031), 1637 states have internal predecessors, (2031), 357 states have call successors, (357), 275 states have call predecessors, (357), 264 states have return successors, (416), 333 states have call predecessors, (416), 356 states have call successors, (416) [2022-11-19 07:04:49,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2244 states to 2244 states and 2804 transitions. [2022-11-19 07:04:49,530 INFO L78 Accepts]: Start accepts. Automaton has 2244 states and 2804 transitions. Word has length 71 [2022-11-19 07:04:49,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:04:49,531 INFO L495 AbstractCegarLoop]: Abstraction has 2244 states and 2804 transitions. [2022-11-19 07:04:49,531 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 07:04:49,532 INFO L276 IsEmpty]: Start isEmpty. Operand 2244 states and 2804 transitions. [2022-11-19 07:04:49,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-19 07:04:49,534 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:04:49,534 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 07:04:49,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-19 07:04:49,535 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:04:49,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:04:49,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1445641267, now seen corresponding path program 1 times [2022-11-19 07:04:49,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:04:49,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825301668] [2022-11-19 07:04:49,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:04:49,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:04:49,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:04:49,906 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 07:04:49,906 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:04:49,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825301668] [2022-11-19 07:04:49,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825301668] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:04:49,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759386216] [2022-11-19 07:04:49,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:04:49,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:04:49,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f69433e-5e1a-4cfc-8914-5d2c091bc372/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:04:49,908 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f69433e-5e1a-4cfc-8914-5d2c091bc372/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:04:49,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f69433e-5e1a-4cfc-8914-5d2c091bc372/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 07:04:50,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:04:50,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-19 07:04:50,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:04:50,123 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 07:04:50,124 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:04:50,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759386216] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:04:50,124 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:04:50,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [14] total 17 [2022-11-19 07:04:50,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370441573] [2022-11-19 07:04:50,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:04:50,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:04:50,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:04:50,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:04:50,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-11-19 07:04:50,126 INFO L87 Difference]: Start difference. First operand 2244 states and 2804 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 07:04:50,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:04:50,692 INFO L93 Difference]: Finished difference Result 3644 states and 4460 transitions. [2022-11-19 07:04:50,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 07:04:50,693 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 07:04:50,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:04:50,702 INFO L225 Difference]: With dead ends: 3644 [2022-11-19 07:04:50,702 INFO L226 Difference]: Without dead ends: 2025 [2022-11-19 07:04:50,705 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-11-19 07:04:50,706 INFO L413 NwaCegarLoop]: 282 mSDtfsCounter, 255 mSDsluCounter, 774 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 1056 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:04:50,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 1056 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:04:50,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2025 states. [2022-11-19 07:04:50,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2025 to 1737. [2022-11-19 07:04:50,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1737 states, 1305 states have (on average 1.282758620689655) internal successors, (1674), 1319 states have internal predecessors, (1674), 253 states have call successors, (253), 184 states have call predecessors, (253), 177 states have return successors, (306), 235 states have call predecessors, (306), 252 states have call successors, (306) [2022-11-19 07:04:50,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1737 states to 1737 states and 2233 transitions. [2022-11-19 07:04:50,974 INFO L78 Accepts]: Start accepts. Automaton has 1737 states and 2233 transitions. Word has length 102 [2022-11-19 07:04:50,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:04:50,974 INFO L495 AbstractCegarLoop]: Abstraction has 1737 states and 2233 transitions. [2022-11-19 07:04:50,975 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 07:04:50,975 INFO L276 IsEmpty]: Start isEmpty. Operand 1737 states and 2233 transitions. [2022-11-19 07:04:50,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-19 07:04:50,978 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:04:50,978 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:04:50,989 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f69433e-5e1a-4cfc-8914-5d2c091bc372/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 07:04:51,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f69433e-5e1a-4cfc-8914-5d2c091bc372/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:04:51,185 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:04:51,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:04:51,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1222040967, now seen corresponding path program 1 times [2022-11-19 07:04:51,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:04:51,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938032696] [2022-11-19 07:04:51,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:04:51,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:04:51,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:04:51,329 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 07:04:51,329 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:04:51,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938032696] [2022-11-19 07:04:51,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938032696] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:04:51,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768723934] [2022-11-19 07:04:51,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:04:51,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:04:51,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f69433e-5e1a-4cfc-8914-5d2c091bc372/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:04:51,331 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f69433e-5e1a-4cfc-8914-5d2c091bc372/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:04:51,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f69433e-5e1a-4cfc-8914-5d2c091bc372/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 07:04:51,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:04:51,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 702 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:04:51,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:04:51,561 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-19 07:04:51,561 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:04:51,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768723934] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:04:51,562 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:04:51,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-19 07:04:51,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629476149] [2022-11-19 07:04:51,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:04:51,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:04:51,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:04:51,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:04:51,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:04:51,564 INFO L87 Difference]: Start difference. First operand 1737 states and 2233 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 2 states have internal predecessors, (68), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 07:04:51,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:04:51,984 INFO L93 Difference]: Finished difference Result 2905 states and 4132 transitions. [2022-11-19 07:04:51,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:04:51,985 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 2 states have internal predecessors, (68), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 101 [2022-11-19 07:04:51,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:04:51,994 INFO L225 Difference]: With dead ends: 2905 [2022-11-19 07:04:51,995 INFO L226 Difference]: Without dead ends: 2313 [2022-11-19 07:04:51,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:04:51,998 INFO L413 NwaCegarLoop]: 250 mSDtfsCounter, 253 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:04:51,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 401 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:04:52,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2313 states. [2022-11-19 07:04:52,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2313 to 2306. [2022-11-19 07:04:52,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2306 states, 1767 states have (on average 1.3338992642897567) internal successors, (2357), 1784 states have internal predecessors, (2357), 330 states have call successors, (330), 214 states have call predecessors, (330), 207 states have return successors, (421), 309 states have call predecessors, (421), 329 states have call successors, (421) [2022-11-19 07:04:52,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2306 states to 2306 states and 3108 transitions. [2022-11-19 07:04:52,310 INFO L78 Accepts]: Start accepts. Automaton has 2306 states and 3108 transitions. Word has length 101 [2022-11-19 07:04:52,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:04:52,311 INFO L495 AbstractCegarLoop]: Abstraction has 2306 states and 3108 transitions. [2022-11-19 07:04:52,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 2 states have internal predecessors, (68), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 07:04:52,311 INFO L276 IsEmpty]: Start isEmpty. Operand 2306 states and 3108 transitions. [2022-11-19 07:04:52,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-19 07:04:52,315 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:04:52,315 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:04:52,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f69433e-5e1a-4cfc-8914-5d2c091bc372/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 07:04:52,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f69433e-5e1a-4cfc-8914-5d2c091bc372/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-19 07:04:52,521 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:04:52,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:04:52,522 INFO L85 PathProgramCache]: Analyzing trace with hash 30957047, now seen corresponding path program 1 times [2022-11-19 07:04:52,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:04:52,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587665146] [2022-11-19 07:04:52,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:04:52,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:04:52,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:04:52,630 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 07:04:52,630 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:04:52,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587665146] [2022-11-19 07:04:52,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587665146] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:04:52,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871154250] [2022-11-19 07:04:52,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:04:52,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:04:52,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f69433e-5e1a-4cfc-8914-5d2c091bc372/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:04:52,633 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f69433e-5e1a-4cfc-8914-5d2c091bc372/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:04:52,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f69433e-5e1a-4cfc-8914-5d2c091bc372/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 07:04:52,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:04:52,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 696 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:04:52,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:04:52,868 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-19 07:04:52,868 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:04:52,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871154250] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:04:52,868 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:04:52,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-19 07:04:52,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339572175] [2022-11-19 07:04:52,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:04:52,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:04:52,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:04:52,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:04:52,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:04:52,870 INFO L87 Difference]: Start difference. First operand 2306 states and 3108 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 07:04:53,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:04:53,354 INFO L93 Difference]: Finished difference Result 4597 states and 6804 transitions. [2022-11-19 07:04:53,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:04:53,355 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 101 [2022-11-19 07:04:53,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:04:53,372 INFO L225 Difference]: With dead ends: 4597 [2022-11-19 07:04:53,372 INFO L226 Difference]: Without dead ends: 3436 [2022-11-19 07:04:53,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:04:53,378 INFO L413 NwaCegarLoop]: 250 mSDtfsCounter, 247 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:04:53,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 401 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:04:53,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3436 states. [2022-11-19 07:04:53,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3436 to 3424. [2022-11-19 07:04:53,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3424 states, 2676 states have (on average 1.3800448430493273) internal successors, (3693), 2699 states have internal predecessors, (3693), 479 states have call successors, (479), 274 states have call predecessors, (479), 267 states have return successors, (642), 452 states have call predecessors, (642), 478 states have call successors, (642) [2022-11-19 07:04:53,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3424 states to 3424 states and 4814 transitions. [2022-11-19 07:04:53,797 INFO L78 Accepts]: Start accepts. Automaton has 3424 states and 4814 transitions. Word has length 101 [2022-11-19 07:04:53,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:04:53,797 INFO L495 AbstractCegarLoop]: Abstraction has 3424 states and 4814 transitions. [2022-11-19 07:04:53,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 07:04:53,799 INFO L276 IsEmpty]: Start isEmpty. Operand 3424 states and 4814 transitions. [2022-11-19 07:04:53,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-19 07:04:53,805 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:04:53,805 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:04:53,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f69433e-5e1a-4cfc-8914-5d2c091bc372/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 07:04:54,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f69433e-5e1a-4cfc-8914-5d2c091bc372/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-19 07:04:54,011 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:04:54,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:04:54,012 INFO L85 PathProgramCache]: Analyzing trace with hash -511602699, now seen corresponding path program 1 times [2022-11-19 07:04:54,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:04:54,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302780730] [2022-11-19 07:04:54,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:04:54,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:04:54,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:04:54,125 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 07:04:54,125 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:04:54,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302780730] [2022-11-19 07:04:54,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302780730] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:04:54,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571123505] [2022-11-19 07:04:54,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:04:54,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:04:54,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f69433e-5e1a-4cfc-8914-5d2c091bc372/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:04:54,128 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f69433e-5e1a-4cfc-8914-5d2c091bc372/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:04:54,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f69433e-5e1a-4cfc-8914-5d2c091bc372/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 07:04:54,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:04:54,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 690 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:04:54,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:04:54,338 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-19 07:04:54,338 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:04:54,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571123505] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:04:54,339 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:04:54,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-19 07:04:54,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445500841] [2022-11-19 07:04:54,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:04:54,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:04:54,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:04:54,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:04:54,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:04:54,342 INFO L87 Difference]: Start difference. First operand 3424 states and 4814 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 07:04:55,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:04:55,043 INFO L93 Difference]: Finished difference Result 7921 states and 12007 transitions. [2022-11-19 07:04:55,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:04:55,045 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 101 [2022-11-19 07:04:55,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:04:55,072 INFO L225 Difference]: With dead ends: 7921 [2022-11-19 07:04:55,072 INFO L226 Difference]: Without dead ends: 5642 [2022-11-19 07:04:55,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:04:55,085 INFO L413 NwaCegarLoop]: 250 mSDtfsCounter, 256 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:04:55,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [256 Valid, 401 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:04:55,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5642 states. [2022-11-19 07:04:55,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5642 to 5620. [2022-11-19 07:04:55,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5620 states, 4464 states have (on average 1.412410394265233) internal successors, (6305), 4499 states have internal predecessors, (6305), 767 states have call successors, (767), 394 states have call predecessors, (767), 387 states have return successors, (1066), 728 states have call predecessors, (1066), 766 states have call successors, (1066) [2022-11-19 07:04:55,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5620 states to 5620 states and 8138 transitions. [2022-11-19 07:04:55,776 INFO L78 Accepts]: Start accepts. Automaton has 5620 states and 8138 transitions. Word has length 101 [2022-11-19 07:04:55,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:04:55,777 INFO L495 AbstractCegarLoop]: Abstraction has 5620 states and 8138 transitions. [2022-11-19 07:04:55,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 07:04:55,777 INFO L276 IsEmpty]: Start isEmpty. Operand 5620 states and 8138 transitions. [2022-11-19 07:04:55,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-19 07:04:55,787 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:04:55,787 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:04:55,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f69433e-5e1a-4cfc-8914-5d2c091bc372/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-19 07:04:55,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f69433e-5e1a-4cfc-8914-5d2c091bc372/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:04:55,994 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:04:55,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:04:55,994 INFO L85 PathProgramCache]: Analyzing trace with hash -8537161, now seen corresponding path program 1 times [2022-11-19 07:04:55,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:04:55,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681285401] [2022-11-19 07:04:55,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:04:55,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:04:56,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:04:56,109 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-19 07:04:56,109 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:04:56,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681285401] [2022-11-19 07:04:56,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681285401] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:04:56,110 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:04:56,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:04:56,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052671262] [2022-11-19 07:04:56,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:04:56,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:04:56,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:04:56,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:04:56,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:04:56,112 INFO L87 Difference]: Start difference. First operand 5620 states and 8138 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-19 07:04:56,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:04:56,935 INFO L93 Difference]: Finished difference Result 10230 states and 15503 transitions. [2022-11-19 07:04:56,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:04:56,936 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 101 [2022-11-19 07:04:56,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:04:56,967 INFO L225 Difference]: With dead ends: 10230 [2022-11-19 07:04:56,967 INFO L226 Difference]: Without dead ends: 6644 [2022-11-19 07:04:56,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:04:56,982 INFO L413 NwaCegarLoop]: 321 mSDtfsCounter, 83 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 563 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:04:56,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 563 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:04:56,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6644 states. [2022-11-19 07:04:57,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6644 to 6260. [2022-11-19 07:04:57,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6260 states, 5072 states have (on average 1.449723974763407) internal successors, (7353), 5107 states have internal predecessors, (7353), 783 states have call successors, (783), 410 states have call predecessors, (783), 403 states have return successors, (1082), 744 states have call predecessors, (1082), 782 states have call successors, (1082) [2022-11-19 07:04:57,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6260 states to 6260 states and 9218 transitions. [2022-11-19 07:04:57,702 INFO L78 Accepts]: Start accepts. Automaton has 6260 states and 9218 transitions. Word has length 101 [2022-11-19 07:04:57,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:04:57,702 INFO L495 AbstractCegarLoop]: Abstraction has 6260 states and 9218 transitions. [2022-11-19 07:04:57,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-19 07:04:57,703 INFO L276 IsEmpty]: Start isEmpty. Operand 6260 states and 9218 transitions. [2022-11-19 07:04:57,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-19 07:04:57,714 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:04:57,714 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 07:04:57,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-19 07:04:57,715 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:04:57,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:04:57,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1667601710, now seen corresponding path program 1 times [2022-11-19 07:04:57,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:04:57,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905548641] [2022-11-19 07:04:57,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:04:57,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:04:57,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:04:57,897 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 07:04:57,897 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:04:57,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905548641] [2022-11-19 07:04:57,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905548641] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:04:57,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025910562] [2022-11-19 07:04:57,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:04:57,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:04:57,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f69433e-5e1a-4cfc-8914-5d2c091bc372/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:04:57,900 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f69433e-5e1a-4cfc-8914-5d2c091bc372/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:04:57,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f69433e-5e1a-4cfc-8914-5d2c091bc372/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 07:04:58,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:04:58,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 07:04:58,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:04:58,130 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 07:04:58,130 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:04:58,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025910562] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:04:58,130 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:04:58,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2022-11-19 07:04:58,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697869926] [2022-11-19 07:04:58,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:04:58,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 07:04:58,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:04:58,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 07:04:58,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-11-19 07:04:58,133 INFO L87 Difference]: Start difference. First operand 6260 states and 9218 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 07:04:59,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:04:59,096 INFO L93 Difference]: Finished difference Result 7046 states and 10113 transitions. [2022-11-19 07:04:59,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 07:04:59,097 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 07:04:59,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:04:59,121 INFO L225 Difference]: With dead ends: 7046 [2022-11-19 07:04:59,121 INFO L226 Difference]: Without dead ends: 5988 [2022-11-19 07:04:59,126 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 07:04:59,126 INFO L413 NwaCegarLoop]: 283 mSDtfsCounter, 72 mSDsluCounter, 819 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 1102 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:04:59,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 1102 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:04:59,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5988 states. [2022-11-19 07:04:59,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5988 to 5870. [2022-11-19 07:04:59,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5870 states, 4792 states have (on average 1.4657762938230383) internal successors, (7024), 4821 states have internal predecessors, (7024), 724 states have call successors, (724), 355 states have call predecessors, (724), 352 states have return successors, (1013), 695 states have call predecessors, (1013), 723 states have call successors, (1013) [2022-11-19 07:04:59,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5870 states to 5870 states and 8761 transitions. [2022-11-19 07:04:59,851 INFO L78 Accepts]: Start accepts. Automaton has 5870 states and 8761 transitions. Word has length 112 [2022-11-19 07:04:59,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:04:59,851 INFO L495 AbstractCegarLoop]: Abstraction has 5870 states and 8761 transitions. [2022-11-19 07:04:59,852 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 07:04:59,852 INFO L276 IsEmpty]: Start isEmpty. Operand 5870 states and 8761 transitions. [2022-11-19 07:04:59,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-19 07:04:59,862 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:04:59,862 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] [2022-11-19 07:04:59,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f69433e-5e1a-4cfc-8914-5d2c091bc372/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-19 07:05:00,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f69433e-5e1a-4cfc-8914-5d2c091bc372/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-19 07:05:00,069 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:05:00,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:05:00,070 INFO L85 PathProgramCache]: Analyzing trace with hash 892190063, now seen corresponding path program 1 times [2022-11-19 07:05:00,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:05:00,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566278368] [2022-11-19 07:05:00,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:05:00,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:05:00,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:05:00,129 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-19 07:05:00,130 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:05:00,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566278368] [2022-11-19 07:05:00,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566278368] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:05:00,130 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:05:00,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:05:00,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358691420] [2022-11-19 07:05:00,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:05:00,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:05:00,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:05:00,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:05:00,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:05:00,135 INFO L87 Difference]: Start difference. First operand 5870 states and 8761 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-19 07:05:00,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:05:00,905 INFO L93 Difference]: Finished difference Result 6363 states and 9319 transitions. [2022-11-19 07:05:00,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:05:00,906 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 113 [2022-11-19 07:05:00,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:05:00,927 INFO L225 Difference]: With dead ends: 6363 [2022-11-19 07:05:00,927 INFO L226 Difference]: Without dead ends: 5737 [2022-11-19 07:05:00,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:05:00,932 INFO L413 NwaCegarLoop]: 275 mSDtfsCounter, 308 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:05:00,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [308 Valid, 465 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:05:00,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5737 states. [2022-11-19 07:05:01,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5737 to 5690. [2022-11-19 07:05:01,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5690 states, 4664 states have (on average 1.474056603773585) internal successors, (6875), 4691 states have internal predecessors, (6875), 696 states have call successors, (696), 329 states have call predecessors, (696), 328 states have return successors, (983), 671 states have call predecessors, (983), 695 states have call successors, (983) [2022-11-19 07:05:01,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5690 states to 5690 states and 8554 transitions. [2022-11-19 07:05:01,423 INFO L78 Accepts]: Start accepts. Automaton has 5690 states and 8554 transitions. Word has length 113 [2022-11-19 07:05:01,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:05:01,424 INFO L495 AbstractCegarLoop]: Abstraction has 5690 states and 8554 transitions. [2022-11-19 07:05:01,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-19 07:05:01,424 INFO L276 IsEmpty]: Start isEmpty. Operand 5690 states and 8554 transitions. [2022-11-19 07:05:01,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-19 07:05:01,434 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:05:01,434 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 07:05:01,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-19 07:05:01,434 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:05:01,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:05:01,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1849118446, now seen corresponding path program 1 times [2022-11-19 07:05:01,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:05:01,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388256896] [2022-11-19 07:05:01,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:05:01,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:05:01,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:05:01,580 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 07:05:01,581 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:05:01,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388256896] [2022-11-19 07:05:01,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388256896] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:05:01,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069062359] [2022-11-19 07:05:01,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:05:01,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:05:01,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f69433e-5e1a-4cfc-8914-5d2c091bc372/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:05:01,591 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f69433e-5e1a-4cfc-8914-5d2c091bc372/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:05:01,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f69433e-5e1a-4cfc-8914-5d2c091bc372/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-19 07:05:01,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:05:01,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 07:05:01,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:05:01,805 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 07:05:01,806 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:05:01,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069062359] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:05:01,806 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:05:01,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 11 [2022-11-19 07:05:01,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783605628] [2022-11-19 07:05:01,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:05:01,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:05:01,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:05:01,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:05:01,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-19 07:05:01,808 INFO L87 Difference]: Start difference. First operand 5690 states and 8554 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 07:05:02,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:05:02,554 INFO L93 Difference]: Finished difference Result 6439 states and 9399 transitions. [2022-11-19 07:05:02,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 07:05:02,555 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 07:05:02,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:05:02,575 INFO L225 Difference]: With dead ends: 6439 [2022-11-19 07:05:02,575 INFO L226 Difference]: Without dead ends: 5982 [2022-11-19 07:05:02,578 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 07:05:02,579 INFO L413 NwaCegarLoop]: 274 mSDtfsCounter, 239 mSDsluCounter, 881 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 1155 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:05:02,579 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 1155 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:05:02,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5982 states. [2022-11-19 07:05:03,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5982 to 5948. [2022-11-19 07:05:03,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5948 states, 4826 states have (on average 1.4618731869042685) internal successors, (7055), 4859 states have internal predecessors, (7055), 744 states have call successors, (744), 371 states have call predecessors, (744), 376 states have return successors, (1043), 719 states have call predecessors, (1043), 743 states have call successors, (1043) [2022-11-19 07:05:03,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5948 states to 5948 states and 8842 transitions. [2022-11-19 07:05:03,178 INFO L78 Accepts]: Start accepts. Automaton has 5948 states and 8842 transitions. Word has length 113 [2022-11-19 07:05:03,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:05:03,179 INFO L495 AbstractCegarLoop]: Abstraction has 5948 states and 8842 transitions. [2022-11-19 07:05:03,179 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 07:05:03,179 INFO L276 IsEmpty]: Start isEmpty. Operand 5948 states and 8842 transitions. [2022-11-19 07:05:03,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-19 07:05:03,188 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:05:03,188 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 07:05:03,194 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f69433e-5e1a-4cfc-8914-5d2c091bc372/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-19 07:05:03,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f69433e-5e1a-4cfc-8914-5d2c091bc372/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:05:03,394 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:05:03,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:05:03,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1204142891, now seen corresponding path program 1 times [2022-11-19 07:05:03,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:05:03,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421400196] [2022-11-19 07:05:03,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:05:03,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:05:03,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:05:04,388 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 07:05:04,388 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:05:04,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421400196] [2022-11-19 07:05:04,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421400196] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:05:04,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123710941] [2022-11-19 07:05:04,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:05:04,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:05:04,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f69433e-5e1a-4cfc-8914-5d2c091bc372/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:05:04,392 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f69433e-5e1a-4cfc-8914-5d2c091bc372/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:05:04,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f69433e-5e1a-4cfc-8914-5d2c091bc372/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-19 07:05:04,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:05:04,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-19 07:05:04,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:05:05,530 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 07:05:05,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:05:07,596 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 07:05:07,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123710941] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:05:07,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1138967493] [2022-11-19 07:05:07,600 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2022-11-19 07:05:07,600 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:05:07,601 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:05:07,601 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:05:07,601 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:05:51,804 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 272 for LOIs [2022-11-19 07:05:52,244 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 223 for LOIs [2022-11-19 07:05:52,303 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 214 for LOIs [2022-11-19 07:05:52,364 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 284 for LOIs [2022-11-19 07:05:54,242 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 162 for LOIs [2022-11-19 07:05:54,494 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 108 for LOIs [2022-11-19 07:05:54,708 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 276 for LOIs [2022-11-19 07:05:55,154 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 299 for LOIs [2022-11-19 07:05:55,584 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:06:59,435 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '188237#(and (= ~q_req_up~0 1) (= ~T6_E~0 2) (= ~t6_i~0 0) (= ~t5_i~0 0) (= 0 ~t5_pc~0) (= ~t7_i~0 0) (= ~t1_pc~0 0) (= 0 ~t7_pc~0) (= ~T4_E~0 2) (<= 0 ~c_dr_pc~0) (<= 0 ~p_dw_st~0) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~T5_E~0 2) (<= 0 ~p_dw_pc~0) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (= ~T2_E~0 2) (<= ~c_dr_pc~0 1) (= 1 ~c_dr_i~0) (<= ~p_dw_st~0 2) (= 0 ~t6_pc~0) (= 0 ~t5_st~0) (= ~E_3~0 2) (= 0 ~t6_st~0) (= ~t4_i~0 0) (= ~T7_E~0 2) (<= 2 ~E_6~0) (= ~m_i~0 0) (<= ~t2_i~0 0) (not (= ~c_num_read~0 ~p_num_write~0)) (<= ~E_4~0 2) (<= 2 ~E_7~0) (= ~E_2~0 2) (<= ~E_6~0 2) (<= 0 ~t2_i~0) (<= ~t3_st~0 0) (= ~T3_E~0 2) (= ~local~0 0) (= ~t3_i~0 0) (= 0 ~t7_st~0) (= ~token~0 0) (<= 0 ~t3_st~0) (<= ~m_pc~0 0) (<= 2 ~E_4~0) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (<= ~E_5~0 2) (<= ~m_st~0 0) (<= ~t3_pc~0 0) (= |#NULL.offset| 0) (= ~c_last_read~0 ~p_last_write~0) (<= 0 ~m_pc~0) (= ~E_M~0 2) (<= 0 ~t3_pc~0) (= 0 ~t2_st~0) (<= 2 ~E_5~0) (<= 1 ~c_num_read~0) (<= 0 ~m_st~0) (<= ~t4_pc~0 0) (= ~E_1~0 2) (<= 0 ~t4_pc~0) (= ~M_E~0 2) (<= ~t1_st~0 0) (<= 0 |#StackHeapBarrier|) (= ~c_dr_st~0 1) (<= 0 ~t1_st~0) (<= ~E_7~0 2) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-11-19 07:06:59,435 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:06:59,435 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:06:59,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17, 16] total 51 [2022-11-19 07:06:59,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202952862] [2022-11-19 07:06:59,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:06:59,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-19 07:06:59,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:06:59,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-19 07:06:59,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=10774, Unknown=0, NotChecked=0, Total=11556 [2022-11-19 07:06:59,442 INFO L87 Difference]: Start difference. First operand 5948 states and 8842 transitions. Second operand has 51 states, 33 states have (on average 5.909090909090909) internal successors, (195), 38 states have internal predecessors, (195), 19 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 19 states have call predecessors, (46), 19 states have call successors, (46) [2022-11-19 07:07:23,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:07:23,615 INFO L93 Difference]: Finished difference Result 8461 states and 11760 transitions. [2022-11-19 07:07:23,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 229 states. [2022-11-19 07:07:23,616 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 33 states have (on average 5.909090909090909) internal successors, (195), 38 states have internal predecessors, (195), 19 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 19 states have call predecessors, (46), 19 states have call successors, (46) Word has length 114 [2022-11-19 07:07:23,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:07:23,641 INFO L225 Difference]: With dead ends: 8461 [2022-11-19 07:07:23,641 INFO L226 Difference]: Without dead ends: 7743 [2022-11-19 07:07:23,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 622 GetRequests, 288 SyntacticMatches, 4 SemanticMatches, 330 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44669 ImplicationChecksByTransitivity, 82.2s TimeCoverageRelationStatistics Valid=10069, Invalid=99823, Unknown=0, NotChecked=0, Total=109892 [2022-11-19 07:07:23,662 INFO L413 NwaCegarLoop]: 215 mSDtfsCounter, 5235 mSDsluCounter, 2779 mSDsCounter, 0 mSdLazyCounter, 7704 mSolverCounterSat, 2713 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5235 SdHoareTripleChecker+Valid, 2994 SdHoareTripleChecker+Invalid, 10417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2713 IncrementalHoareTripleChecker+Valid, 7704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:07:23,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5235 Valid, 2994 Invalid, 10417 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2713 Valid, 7704 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2022-11-19 07:07:23,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7743 states. [2022-11-19 07:07:24,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7743 to 6223. [2022-11-19 07:07:24,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6223 states, 5009 states have (on average 1.450189658614494) internal successors, (7264), 5044 states have internal predecessors, (7264), 789 states have call successors, (789), 408 states have call predecessors, (789), 423 states have return successors, (1100), 772 states have call predecessors, (1100), 788 states have call successors, (1100) [2022-11-19 07:07:24,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6223 states to 6223 states and 9153 transitions. [2022-11-19 07:07:24,485 INFO L78 Accepts]: Start accepts. Automaton has 6223 states and 9153 transitions. Word has length 114 [2022-11-19 07:07:24,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:07:24,485 INFO L495 AbstractCegarLoop]: Abstraction has 6223 states and 9153 transitions. [2022-11-19 07:07:24,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 33 states have (on average 5.909090909090909) internal successors, (195), 38 states have internal predecessors, (195), 19 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 19 states have call predecessors, (46), 19 states have call successors, (46) [2022-11-19 07:07:24,530 INFO L276 IsEmpty]: Start isEmpty. Operand 6223 states and 9153 transitions. [2022-11-19 07:07:24,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-19 07:07:24,539 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:07:24,539 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 07:07:24,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f69433e-5e1a-4cfc-8914-5d2c091bc372/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-19 07:07:24,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f69433e-5e1a-4cfc-8914-5d2c091bc372/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:07:24,747 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:07:24,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:07:24,748 INFO L85 PathProgramCache]: Analyzing trace with hash 2135928949, now seen corresponding path program 1 times [2022-11-19 07:07:24,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:07:24,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600432545] [2022-11-19 07:07:24,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:07:24,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:07:24,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:07:25,105 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 07:07:25,105 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:07:25,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600432545] [2022-11-19 07:07:25,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600432545] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:07:25,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843529037] [2022-11-19 07:07:25,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:07:25,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:07:25,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f69433e-5e1a-4cfc-8914-5d2c091bc372/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:07:25,107 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f69433e-5e1a-4cfc-8914-5d2c091bc372/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:07:25,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f69433e-5e1a-4cfc-8914-5d2c091bc372/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-19 07:07:25,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:07:25,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 07:07:25,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:07:25,338 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 07:07:25,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:07:25,542 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 07:07:25,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843529037] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-19 07:07:25,542 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:07:25,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [14, 8] total 20 [2022-11-19 07:07:25,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496631550] [2022-11-19 07:07:25,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:07:25,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 07:07:25,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:07:25,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 07:07:25,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-11-19 07:07:25,544 INFO L87 Difference]: Start difference. First operand 6223 states and 9153 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 07:07:26,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:07:26,953 INFO L93 Difference]: Finished difference Result 7547 states and 10701 transitions. [2022-11-19 07:07:26,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-19 07:07:26,959 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 07:07:26,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:07:26,984 INFO L225 Difference]: With dead ends: 7547 [2022-11-19 07:07:26,984 INFO L226 Difference]: Without dead ends: 6556 [2022-11-19 07:07:26,990 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 07:07:26,991 INFO L413 NwaCegarLoop]: 221 mSDtfsCounter, 407 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 740 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 411 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:07:26,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [411 Valid, 512 Invalid, 838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 740 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 07:07:26,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6556 states. [2022-11-19 07:07:27,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6556 to 6303. [2022-11-19 07:07:27,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6303 states, 5054 states have (on average 1.4473684210526316) internal successors, (7315), 5092 states have internal predecessors, (7315), 808 states have call successors, (808), 417 states have call predecessors, (808), 439 states have return successors, (1140), 795 states have call predecessors, (1140), 807 states have call successors, (1140) [2022-11-19 07:07:27,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6303 states to 6303 states and 9263 transitions. [2022-11-19 07:07:27,946 INFO L78 Accepts]: Start accepts. Automaton has 6303 states and 9263 transitions. Word has length 115 [2022-11-19 07:07:27,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:07:27,947 INFO L495 AbstractCegarLoop]: Abstraction has 6303 states and 9263 transitions. [2022-11-19 07:07:27,947 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 07:07:27,947 INFO L276 IsEmpty]: Start isEmpty. Operand 6303 states and 9263 transitions. [2022-11-19 07:07:27,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-19 07:07:27,955 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:07:27,955 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 07:07:27,966 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f69433e-5e1a-4cfc-8914-5d2c091bc372/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-19 07:07:28,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f69433e-5e1a-4cfc-8914-5d2c091bc372/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-19 07:07:28,161 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:07:28,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:07:28,161 INFO L85 PathProgramCache]: Analyzing trace with hash -795443035, now seen corresponding path program 1 times [2022-11-19 07:07:28,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:07:28,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071677925] [2022-11-19 07:07:28,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:07:28,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:07:28,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:07:29,093 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 30 proven. 27 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-19 07:07:29,094 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:07:29,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071677925] [2022-11-19 07:07:29,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071677925] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:07:29,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779605990] [2022-11-19 07:07:29,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:07:29,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:07:29,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f69433e-5e1a-4cfc-8914-5d2c091bc372/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:07:29,095 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f69433e-5e1a-4cfc-8914-5d2c091bc372/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:07:29,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f69433e-5e1a-4cfc-8914-5d2c091bc372/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-19 07:07:29,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:07:29,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-19 07:07:29,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:07:30,233 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 07:07:30,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:07:32,166 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 07:07:32,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779605990] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:07:32,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [436253982] [2022-11-19 07:07:32,170 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2022-11-19 07:07:32,170 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:07:32,171 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:07:32,171 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:07:32,171 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:07:44,158 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 272 for LOIs [2022-11-19 07:07:44,819 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 222 for LOIs [2022-11-19 07:07:44,875 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 110 for LOIs [2022-11-19 07:07:44,888 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 284 for LOIs [2022-11-19 07:07:46,895 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 162 for LOIs [2022-11-19 07:07:47,146 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 110 for LOIs [2022-11-19 07:07:47,437 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 276 for LOIs [2022-11-19 07:07:48,040 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 299 for LOIs [2022-11-19 07:07:48,544 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:08:50,743 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '231139#(and (= ~q_req_up~0 1) (or (and (= ~T6_E~0 2) (= ~t6_i~0 0) (= ~t5_i~0 0) (= 0 ~t5_pc~0) (= ~E_4~0 2) (= ~t7_i~0 0) (= ~t1_pc~0 0) (= 0 ~t7_pc~0) (= ~T4_E~0 2) (= ~E_7~0 2) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~T5_E~0 2) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (= 0 ~t6_pc~0) (= 0 ~t5_st~0) (= ~E_3~0 2) (= 0 ~t6_st~0) (= ~t2_i~0 0) (= ~E_6~0 2) (= ~t4_i~0 0) (= ~T7_E~0 2) (= ~m_i~0 0) (= ~E_2~0 2) (= ~p_dw_st~0 0) (= ~T3_E~0 2) (= ~local~0 0) (= ~t3_i~0 0) (= 0 ~t7_st~0) (= ~token~0 0) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (= |#NULL.offset| 0) (= ~E_M~0 2) (= 0 ~t2_st~0) (= ~E_1~0 2) (= ~M_E~0 2) (= ~t1_i~0 0) (= |#NULL.base| 0)) (and (= ~T6_E~0 2) (= ~t6_i~0 0) (= ~t5_i~0 0) (= 0 ~t5_pc~0) (= ~E_4~0 2) (= ~t7_i~0 0) (= ~t1_pc~0 0) (= 0 ~t7_pc~0) (= ~T4_E~0 2) (= ~E_7~0 2) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~T5_E~0 2) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (= 0 ~t6_pc~0) (= 0 ~t5_st~0) (= ~E_3~0 2) (= 0 ~t6_st~0) (= ~t2_i~0 0) (= ~E_6~0 2) (= ~t4_i~0 0) (= ~T7_E~0 2) (= ~m_i~0 0) (= ~p_dw_pc~0 1) (= ~E_2~0 2) (= ~T3_E~0 2) (= ~local~0 0) (= ~t3_i~0 0) (= 0 ~t7_st~0) (= ~token~0 0) (= 2 ~p_dw_st~0) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (= |#NULL.offset| 0) (= ~E_M~0 2) (= 0 ~t2_st~0) (= ~E_1~0 2) (= ~M_E~0 2) (= ~t1_i~0 0) (= |#NULL.base| 0))) (<= 0 ~p_dw_pc~0) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (= ~c_dr_pc~0 1) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~c_last_read~0 ~q_buf_0~0) (<= ~t3_st~0 0) (<= ~c_num_read~0 1) (<= 0 ~t3_st~0) (<= ~m_pc~0 0) (<= ~E_5~0 2) (<= ~m_st~0 0) (<= ~t3_pc~0 0) (= ~c_last_read~0 ~p_last_write~0) (<= 0 ~m_pc~0) (<= 0 ~t3_pc~0) (<= 2 ~E_5~0) (<= 1 ~c_num_read~0) (<= 0 ~m_st~0) (<= ~t4_pc~0 0) (<= 0 ~t4_pc~0) (<= ~t1_st~0 0) (<= 0 |#StackHeapBarrier|) (= ~c_dr_st~0 1) (<= 0 ~t1_st~0))' at error location [2022-11-19 07:08:50,743 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:08:50,743 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:08:50,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 18, 18] total 55 [2022-11-19 07:08:50,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768615675] [2022-11-19 07:08:50,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:08:50,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-11-19 07:08:50,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:08:50,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-11-19 07:08:50,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=953, Invalid=11703, Unknown=0, NotChecked=0, Total=12656 [2022-11-19 07:08:50,747 INFO L87 Difference]: Start difference. First operand 6303 states and 9263 transitions. Second operand has 55 states, 36 states have (on average 5.944444444444445) internal successors, (214), 40 states have internal predecessors, (214), 25 states have call successors, (49), 17 states have call predecessors, (49), 22 states have return successors, (51), 24 states have call predecessors, (51), 25 states have call successors, (51) [2022-11-19 07:09:09,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:09:09,760 INFO L93 Difference]: Finished difference Result 8587 states and 11965 transitions. [2022-11-19 07:09:09,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2022-11-19 07:09:09,760 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 36 states have (on average 5.944444444444445) internal successors, (214), 40 states have internal predecessors, (214), 25 states have call successors, (49), 17 states have call predecessors, (49), 22 states have return successors, (51), 24 states have call predecessors, (51), 25 states have call successors, (51) Word has length 124 [2022-11-19 07:09:09,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:09:09,780 INFO L225 Difference]: With dead ends: 8587 [2022-11-19 07:09:09,780 INFO L226 Difference]: Without dead ends: 7516 [2022-11-19 07:09:09,792 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 584 GetRequests, 321 SyntacticMatches, 1 SemanticMatches, 262 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26843 ImplicationChecksByTransitivity, 73.8s TimeCoverageRelationStatistics Valid=6751, Invalid=62681, Unknown=0, NotChecked=0, Total=69432 [2022-11-19 07:09:09,793 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 6036 mSDsluCounter, 3165 mSDsCounter, 0 mSdLazyCounter, 9218 mSolverCounterSat, 3887 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6036 SdHoareTripleChecker+Valid, 3373 SdHoareTripleChecker+Invalid, 13105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3887 IncrementalHoareTripleChecker+Valid, 9218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2022-11-19 07:09:09,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6036 Valid, 3373 Invalid, 13105 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3887 Valid, 9218 Invalid, 0 Unknown, 0 Unchecked, 6.9s Time] [2022-11-19 07:09:09,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7516 states. [2022-11-19 07:09:10,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7516 to 6119. [2022-11-19 07:09:10,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6119 states, 4942 states have (on average 1.4542695265074868) internal successors, (7187), 4979 states have internal predecessors, (7187), 768 states have call successors, (768), 385 states have call predecessors, (768), 407 states have return successors, (1090), 756 states have call predecessors, (1090), 767 states have call successors, (1090) [2022-11-19 07:09:10,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6119 states to 6119 states and 9045 transitions. [2022-11-19 07:09:10,814 INFO L78 Accepts]: Start accepts. Automaton has 6119 states and 9045 transitions. Word has length 124 [2022-11-19 07:09:10,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:09:10,814 INFO L495 AbstractCegarLoop]: Abstraction has 6119 states and 9045 transitions. [2022-11-19 07:09:10,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 36 states have (on average 5.944444444444445) internal successors, (214), 40 states have internal predecessors, (214), 25 states have call successors, (49), 17 states have call predecessors, (49), 22 states have return successors, (51), 24 states have call predecessors, (51), 25 states have call successors, (51) [2022-11-19 07:09:10,814 INFO L276 IsEmpty]: Start isEmpty. Operand 6119 states and 9045 transitions. [2022-11-19 07:09:10,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-19 07:09:10,821 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:09:10,821 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 07:09:10,826 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f69433e-5e1a-4cfc-8914-5d2c091bc372/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-19 07:09:11,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f69433e-5e1a-4cfc-8914-5d2c091bc372/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-19 07:09:11,022 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:09:11,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:09:11,022 INFO L85 PathProgramCache]: Analyzing trace with hash 659710019, now seen corresponding path program 1 times [2022-11-19 07:09:11,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:09:11,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482057998] [2022-11-19 07:09:11,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:09:11,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:09:11,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:09:11,229 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 07:09:11,229 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:09:11,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482057998] [2022-11-19 07:09:11,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482057998] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:09:11,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479678109] [2022-11-19 07:09:11,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:09:11,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:09:11,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f69433e-5e1a-4cfc-8914-5d2c091bc372/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:09:11,232 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f69433e-5e1a-4cfc-8914-5d2c091bc372/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:09:11,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f69433e-5e1a-4cfc-8914-5d2c091bc372/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-19 07:09:11,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:09:11,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-19 07:09:11,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:09:11,515 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 07:09:11,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:09:11,723 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 07:09:11,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479678109] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-19 07:09:11,723 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:09:11,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 10] total 17 [2022-11-19 07:09:11,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376717558] [2022-11-19 07:09:11,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:09:11,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 07:09:11,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:09:11,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 07:09:11,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-11-19 07:09:11,725 INFO L87 Difference]: Start difference. First operand 6119 states and 9045 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 07:09:13,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:09:13,369 INFO L93 Difference]: Finished difference Result 6774 states and 9786 transitions. [2022-11-19 07:09:13,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-19 07:09:13,370 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 07:09:13,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:09:13,381 INFO L225 Difference]: With dead ends: 6774 [2022-11-19 07:09:13,381 INFO L226 Difference]: Without dead ends: 5887 [2022-11-19 07:09:13,385 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2022-11-19 07:09:13,386 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 548 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 861 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 550 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 1009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:09:13,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [550 Valid, 597 Invalid, 1009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 861 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 07:09:13,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5887 states. [2022-11-19 07:09:14,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5887 to 5850. [2022-11-19 07:09:14,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5850 states, 4743 states have (on average 1.4636306135357369) internal successors, (6942), 4780 states have internal predecessors, (6942), 732 states have call successors, (732), 355 states have call predecessors, (732), 373 states have return successors, (1049), 716 states have call predecessors, (1049), 731 states have call successors, (1049) [2022-11-19 07:09:14,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5850 states to 5850 states and 8723 transitions. [2022-11-19 07:09:14,335 INFO L78 Accepts]: Start accepts. Automaton has 5850 states and 8723 transitions. Word has length 125 [2022-11-19 07:09:14,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:09:14,335 INFO L495 AbstractCegarLoop]: Abstraction has 5850 states and 8723 transitions. [2022-11-19 07:09:14,335 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 07:09:14,335 INFO L276 IsEmpty]: Start isEmpty. Operand 5850 states and 8723 transitions. [2022-11-19 07:09:14,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-19 07:09:14,344 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:09:14,344 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:09:14,350 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f69433e-5e1a-4cfc-8914-5d2c091bc372/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-19 07:09:14,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f69433e-5e1a-4cfc-8914-5d2c091bc372/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:09:14,547 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:09:14,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:09:14,547 INFO L85 PathProgramCache]: Analyzing trace with hash -2137145289, now seen corresponding path program 1 times [2022-11-19 07:09:14,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:09:14,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199803787] [2022-11-19 07:09:14,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:09:14,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:09:14,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:09:14,613 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-19 07:09:14,613 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:09:14,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199803787] [2022-11-19 07:09:14,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199803787] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:09:14,614 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:09:14,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:09:14,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371126431] [2022-11-19 07:09:14,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:09:14,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:09:14,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:09:14,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:09:14,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:09:14,615 INFO L87 Difference]: Start difference. First operand 5850 states and 8723 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-19 07:09:16,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:09:16,145 INFO L93 Difference]: Finished difference Result 15903 states and 24764 transitions. [2022-11-19 07:09:16,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:09:16,146 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 136 [2022-11-19 07:09:16,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:09:16,169 INFO L225 Difference]: With dead ends: 15903 [2022-11-19 07:09:16,169 INFO L226 Difference]: Without dead ends: 10788 [2022-11-19 07:09:16,187 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:09:16,187 INFO L413 NwaCegarLoop]: 251 mSDtfsCounter, 246 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 402 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 07:09:16,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 402 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:09:16,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10788 states. [2022-11-19 07:09:17,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10788 to 10730. [2022-11-19 07:09:17,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10730 states, 8795 states have (on average 1.4724275156338829) internal successors, (12950), 8856 states have internal predecessors, (12950), 1304 states have call successors, (1304), 611 states have call predecessors, (1304), 629 states have return successors, (1877), 1264 states have call predecessors, (1877), 1303 states have call successors, (1877) [2022-11-19 07:09:17,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10730 states to 10730 states and 16131 transitions. [2022-11-19 07:09:17,881 INFO L78 Accepts]: Start accepts. Automaton has 10730 states and 16131 transitions. Word has length 136 [2022-11-19 07:09:17,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:09:17,882 INFO L495 AbstractCegarLoop]: Abstraction has 10730 states and 16131 transitions. [2022-11-19 07:09:17,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-19 07:09:17,882 INFO L276 IsEmpty]: Start isEmpty. Operand 10730 states and 16131 transitions. [2022-11-19 07:09:17,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-19 07:09:17,904 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:09:17,905 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:09:17,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-11-19 07:09:17,905 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:09:17,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:09:17,906 INFO L85 PathProgramCache]: Analyzing trace with hash -534157951, now seen corresponding path program 1 times [2022-11-19 07:09:17,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:09:17,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147957754] [2022-11-19 07:09:17,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:09:17,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:09:17,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:09:17,976 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-19 07:09:17,976 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:09:17,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147957754] [2022-11-19 07:09:17,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147957754] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:09:17,977 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:09:17,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:09:17,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715155119] [2022-11-19 07:09:17,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:09:17,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:09:17,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:09:17,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:09:17,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:09:17,978 INFO L87 Difference]: Start difference. First operand 10730 states and 16131 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-19 07:09:20,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:09:20,568 INFO L93 Difference]: Finished difference Result 30367 states and 47144 transitions. [2022-11-19 07:09:20,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:09:20,568 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 136 [2022-11-19 07:09:20,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:09:20,619 INFO L225 Difference]: With dead ends: 30367 [2022-11-19 07:09:20,619 INFO L226 Difference]: Without dead ends: 20372 [2022-11-19 07:09:20,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:09:20,647 INFO L413 NwaCegarLoop]: 251 mSDtfsCounter, 248 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 402 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 07:09:20,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 402 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:09:20,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20372 states. [2022-11-19 07:09:23,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20372 to 20258. [2022-11-19 07:09:23,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20258 states, 16707 states have (on average 1.4713593104686657) internal successors, (24582), 16816 states have internal predecessors, (24582), 2408 states have call successors, (2408), 1123 states have call predecessors, (2408), 1141 states have return successors, (3461), 2320 states have call predecessors, (3461), 2407 states have call successors, (3461) [2022-11-19 07:09:23,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20258 states to 20258 states and 30451 transitions. [2022-11-19 07:09:23,640 INFO L78 Accepts]: Start accepts. Automaton has 20258 states and 30451 transitions. Word has length 136 [2022-11-19 07:09:23,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:09:23,640 INFO L495 AbstractCegarLoop]: Abstraction has 20258 states and 30451 transitions. [2022-11-19 07:09:23,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-19 07:09:23,641 INFO L276 IsEmpty]: Start isEmpty. Operand 20258 states and 30451 transitions. [2022-11-19 07:09:23,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-19 07:09:23,668 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:09:23,668 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:09:23,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-11-19 07:09:23,669 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:09:23,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:09:23,669 INFO L85 PathProgramCache]: Analyzing trace with hash 399066693, now seen corresponding path program 1 times [2022-11-19 07:09:23,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:09:23,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763048812] [2022-11-19 07:09:23,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:09:23,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:09:23,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:09:23,744 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-19 07:09:23,744 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:09:23,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763048812] [2022-11-19 07:09:23,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763048812] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:09:23,744 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:09:23,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:09:23,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941296707] [2022-11-19 07:09:23,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:09:23,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:09:23,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:09:23,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:09:23,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:09:23,746 INFO L87 Difference]: Start difference. First operand 20258 states and 30451 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-19 07:09:28,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:09:28,922 INFO L93 Difference]: Finished difference Result 58599 states and 90344 transitions. [2022-11-19 07:09:28,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:09:28,923 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 136 [2022-11-19 07:09:28,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:09:29,038 INFO L225 Difference]: With dead ends: 58599 [2022-11-19 07:09:29,038 INFO L226 Difference]: Without dead ends: 39076 [2022-11-19 07:09:29,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:09:29,098 INFO L413 NwaCegarLoop]: 251 mSDtfsCounter, 251 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 402 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 07:09:29,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 402 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:09:29,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39076 states. [2022-11-19 07:09:35,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39076 to 38850. [2022-11-19 07:09:35,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38850 states, 32147 states have (on average 1.4644601362491056) internal successors, (47078), 32352 states have internal predecessors, (47078), 4536 states have call successors, (4536), 2147 states have call predecessors, (4536), 2165 states have return successors, (6485), 4352 states have call predecessors, (6485), 4535 states have call successors, (6485) [2022-11-19 07:09:35,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38850 states to 38850 states and 58099 transitions. [2022-11-19 07:09:35,153 INFO L78 Accepts]: Start accepts. Automaton has 38850 states and 58099 transitions. Word has length 136 [2022-11-19 07:09:35,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:09:35,153 INFO L495 AbstractCegarLoop]: Abstraction has 38850 states and 58099 transitions. [2022-11-19 07:09:35,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-19 07:09:35,154 INFO L276 IsEmpty]: Start isEmpty. Operand 38850 states and 58099 transitions. [2022-11-19 07:09:35,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-11-19 07:09:35,252 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:09:35,253 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:09:35,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-11-19 07:09:35,253 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:09:35,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:09:35,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1107251036, now seen corresponding path program 1 times [2022-11-19 07:09:35,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:09:35,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351164686] [2022-11-19 07:09:35,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:09:35,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:09:35,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:09:35,383 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-11-19 07:09:35,383 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:09:35,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351164686] [2022-11-19 07:09:35,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351164686] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:09:35,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308707458] [2022-11-19 07:09:35,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:09:35,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:09:35,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f69433e-5e1a-4cfc-8914-5d2c091bc372/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:09:35,385 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f69433e-5e1a-4cfc-8914-5d2c091bc372/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:09:35,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f69433e-5e1a-4cfc-8914-5d2c091bc372/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-19 07:09:35,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:09:35,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 911 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:09:35,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:09:35,671 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-19 07:09:35,671 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:09:35,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308707458] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:09:35,671 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:09:35,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-19 07:09:35,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704109351] [2022-11-19 07:09:35,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:09:35,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:09:35,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:09:35,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:09:35,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:09:35,673 INFO L87 Difference]: Start difference. First operand 38850 states and 58099 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-19 07:09:41,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:09:41,973 INFO L93 Difference]: Finished difference Result 71869 states and 107304 transitions. [2022-11-19 07:09:41,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:09:41,973 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 156 [2022-11-19 07:09:41,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:09:42,105 INFO L225 Difference]: With dead ends: 71869 [2022-11-19 07:09:42,105 INFO L226 Difference]: Without dead ends: 49339 [2022-11-19 07:09:42,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 156 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 07:09:42,163 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 243 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:09:42,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 303 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:09:42,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49339 states.