./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.06.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc03a73-2ade-4b4a-97fe-df129a3aa82a/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc03a73-2ade-4b4a-97fe-df129a3aa82a/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_dfc03a73-2ade-4b4a-97fe-df129a3aa82a/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc03a73-2ade-4b4a-97fe-df129a3aa82a/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.06.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc03a73-2ade-4b4a-97fe-df129a3aa82a/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_dfc03a73-2ade-4b4a-97fe-df129a3aa82a/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 0becd5109c9f10d4cd495bd258560ff3ae7f6a1dd143c8dd06621d725fa7a35e --- 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 08:36:19,607 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 08:36:19,609 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 08:36:19,629 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 08:36:19,629 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 08:36:19,630 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 08:36:19,632 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 08:36:19,634 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 08:36:19,636 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 08:36:19,637 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 08:36:19,638 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 08:36:19,639 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 08:36:19,640 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 08:36:19,641 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 08:36:19,642 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 08:36:19,643 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 08:36:19,644 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 08:36:19,645 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 08:36:19,647 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 08:36:19,649 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 08:36:19,651 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 08:36:19,652 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 08:36:19,654 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 08:36:19,655 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 08:36:19,659 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 08:36:19,659 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 08:36:19,660 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 08:36:19,661 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 08:36:19,661 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 08:36:19,663 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 08:36:19,663 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 08:36:19,664 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 08:36:19,665 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 08:36:19,666 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 08:36:19,667 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 08:36:19,668 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 08:36:19,669 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 08:36:19,669 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 08:36:19,669 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 08:36:19,670 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 08:36:19,671 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 08:36:19,672 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc03a73-2ade-4b4a-97fe-df129a3aa82a/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 08:36:19,698 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 08:36:19,699 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 08:36:19,699 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 08:36:19,699 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 08:36:19,700 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 08:36:19,700 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 08:36:19,700 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 08:36:19,701 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 08:36:19,701 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 08:36:19,701 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 08:36:19,701 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 08:36:19,702 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 08:36:19,702 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 08:36:19,702 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 08:36:19,702 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 08:36:19,703 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 08:36:19,703 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 08:36:19,703 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 08:36:19,704 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 08:36:19,704 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 08:36:19,705 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 08:36:19,705 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 08:36:19,705 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 08:36:19,706 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 08:36:19,706 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 08:36:19,706 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 08:36:19,706 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 08:36:19,707 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 08:36:19,707 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 08:36:19,707 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 08:36:19,707 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 08:36:19,708 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 08:36:19,708 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:36:19,708 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 08:36:19,709 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 08:36:19,709 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 08:36:19,709 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 08:36:19,709 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 08:36:19,710 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 08:36:19,710 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 08:36:19,710 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 08:36:19,710 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_dfc03a73-2ade-4b4a-97fe-df129a3aa82a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc03a73-2ade-4b4a-97fe-df129a3aa82a/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0becd5109c9f10d4cd495bd258560ff3ae7f6a1dd143c8dd06621d725fa7a35e [2022-11-19 08:36:19,959 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 08:36:19,980 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 08:36:19,983 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 08:36:20,001 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 08:36:20,002 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 08:36:20,004 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc03a73-2ade-4b4a-97fe-df129a3aa82a/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.06.cil-2.c [2022-11-19 08:36:20,110 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc03a73-2ade-4b4a-97fe-df129a3aa82a/bin/utaipan-I9t0OCRTmS/data/adeaf8f44/af40b32a22a645f6bd90f0004c4666c3/FLAG0dc698be6 [2022-11-19 08:36:20,620 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 08:36:20,621 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc03a73-2ade-4b4a-97fe-df129a3aa82a/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.06.cil-2.c [2022-11-19 08:36:20,633 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc03a73-2ade-4b4a-97fe-df129a3aa82a/bin/utaipan-I9t0OCRTmS/data/adeaf8f44/af40b32a22a645f6bd90f0004c4666c3/FLAG0dc698be6 [2022-11-19 08:36:20,937 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc03a73-2ade-4b4a-97fe-df129a3aa82a/bin/utaipan-I9t0OCRTmS/data/adeaf8f44/af40b32a22a645f6bd90f0004c4666c3 [2022-11-19 08:36:20,939 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 08:36:20,941 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 08:36:20,946 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 08:36:20,947 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 08:36:20,951 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 08:36:20,952 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:36:20" (1/1) ... [2022-11-19 08:36:20,953 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b514992 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:36:20, skipping insertion in model container [2022-11-19 08:36:20,954 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:36:20" (1/1) ... [2022-11-19 08:36:20,961 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 08:36:21,023 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 08:36:21,270 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_dfc03a73-2ade-4b4a-97fe-df129a3aa82a/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.06.cil-2.c[914,927] [2022-11-19 08:36:21,357 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_dfc03a73-2ade-4b4a-97fe-df129a3aa82a/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.06.cil-2.c[7115,7128] [2022-11-19 08:36:21,465 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:36:21,475 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 08:36:21,487 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_dfc03a73-2ade-4b4a-97fe-df129a3aa82a/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.06.cil-2.c[914,927] [2022-11-19 08:36:21,502 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_dfc03a73-2ade-4b4a-97fe-df129a3aa82a/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.06.cil-2.c[7115,7128] [2022-11-19 08:36:21,532 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:36:21,551 INFO L208 MainTranslator]: Completed translation [2022-11-19 08:36:21,551 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:36:21 WrapperNode [2022-11-19 08:36:21,551 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 08:36:21,553 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 08:36:21,553 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 08:36:21,553 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 08:36:21,560 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:36:21" (1/1) ... [2022-11-19 08:36:21,571 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:36:21" (1/1) ... [2022-11-19 08:36:21,624 INFO L138 Inliner]: procedures = 65, calls = 75, calls flagged for inlining = 34, calls inlined = 34, statements flattened = 692 [2022-11-19 08:36:21,624 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 08:36:21,625 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 08:36:21,625 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 08:36:21,625 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 08:36:21,635 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:36:21" (1/1) ... [2022-11-19 08:36:21,648 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:36:21" (1/1) ... [2022-11-19 08:36:21,656 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:36:21" (1/1) ... [2022-11-19 08:36:21,656 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:36:21" (1/1) ... [2022-11-19 08:36:21,667 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:36:21" (1/1) ... [2022-11-19 08:36:21,678 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:36:21" (1/1) ... [2022-11-19 08:36:21,681 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:36:21" (1/1) ... [2022-11-19 08:36:21,684 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:36:21" (1/1) ... [2022-11-19 08:36:21,689 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 08:36:21,690 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 08:36:21,690 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 08:36:21,690 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 08:36:21,691 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:36:21" (1/1) ... [2022-11-19 08:36:21,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:36:21,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc03a73-2ade-4b4a-97fe-df129a3aa82a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:36:21,748 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc03a73-2ade-4b4a-97fe-df129a3aa82a/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 08:36:21,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc03a73-2ade-4b4a-97fe-df129a3aa82a/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 08:36:21,809 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 08:36:21,810 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-19 08:36:21,810 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-19 08:36:21,810 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2022-11-19 08:36:21,810 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2022-11-19 08:36:21,810 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-11-19 08:36:21,811 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-11-19 08:36:21,811 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-11-19 08:36:21,811 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-11-19 08:36:21,811 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2022-11-19 08:36:21,812 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2022-11-19 08:36:21,813 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-11-19 08:36:21,813 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-11-19 08:36:21,813 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-11-19 08:36:21,814 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-11-19 08:36:21,814 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2022-11-19 08:36:21,814 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2022-11-19 08:36:21,814 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2022-11-19 08:36:21,814 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2022-11-19 08:36:21,815 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2022-11-19 08:36:21,815 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2022-11-19 08:36:21,815 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-11-19 08:36:21,815 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-11-19 08:36:21,816 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 08:36:21,816 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-11-19 08:36:21,816 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-11-19 08:36:21,816 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2022-11-19 08:36:21,818 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2022-11-19 08:36:21,819 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 08:36:21,819 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 08:36:21,819 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-11-19 08:36:21,819 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-11-19 08:36:21,990 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 08:36:21,992 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 08:36:22,792 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 08:36:23,214 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 08:36:23,214 INFO L300 CfgBuilder]: Removed 13 assume(true) statements. [2022-11-19 08:36:23,217 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:36:23 BoogieIcfgContainer [2022-11-19 08:36:23,218 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 08:36:23,223 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 08:36:23,223 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 08:36:23,227 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 08:36:23,227 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:36:20" (1/3) ... [2022-11-19 08:36:23,229 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@124a89d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:36:23, skipping insertion in model container [2022-11-19 08:36:23,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:36:21" (2/3) ... [2022-11-19 08:36:23,231 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@124a89d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:36:23, skipping insertion in model container [2022-11-19 08:36:23,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:36:23" (3/3) ... [2022-11-19 08:36:23,233 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.06.cil-2.c [2022-11-19 08:36:23,255 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 08:36:23,255 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-19 08:36:23,339 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 08:36:23,345 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;@4954d9d2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 08:36:23,345 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-19 08:36:23,362 INFO L276 IsEmpty]: Start isEmpty. Operand has 194 states, 143 states have (on average 1.5174825174825175) internal successors, (217), 149 states have internal predecessors, (217), 34 states have call successors, (34), 14 states have call predecessors, (34), 14 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2022-11-19 08:36:23,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-19 08:36:23,378 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:36:23,379 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 08:36:23,381 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:36:23,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:36:23,390 INFO L85 PathProgramCache]: Analyzing trace with hash -2013368908, now seen corresponding path program 1 times [2022-11-19 08:36:23,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:36:23,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947290009] [2022-11-19 08:36:23,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:36:23,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:36:23,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:36:23,833 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 08:36:23,834 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:36:23,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947290009] [2022-11-19 08:36:23,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947290009] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:36:23,835 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:36:23,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 08:36:23,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049893260] [2022-11-19 08:36:23,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:36:23,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 08:36:23,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:36:23,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 08:36:23,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:36:23,888 INFO L87 Difference]: Start difference. First operand has 194 states, 143 states have (on average 1.5174825174825175) internal successors, (217), 149 states have internal predecessors, (217), 34 states have call successors, (34), 14 states have call predecessors, (34), 14 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) 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 08:36:25,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:36:25,070 INFO L93 Difference]: Finished difference Result 808 states and 1168 transitions. [2022-11-19 08:36:25,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 08:36:25,073 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 08:36:25,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:36:25,088 INFO L225 Difference]: With dead ends: 808 [2022-11-19 08:36:25,088 INFO L226 Difference]: Without dead ends: 600 [2022-11-19 08:36:25,094 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 08:36:25,097 INFO L413 NwaCegarLoop]: 386 mSDtfsCounter, 878 mSDsluCounter, 587 mSDsCounter, 0 mSdLazyCounter, 658 mSolverCounterSat, 333 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 887 SdHoareTripleChecker+Valid, 973 SdHoareTripleChecker+Invalid, 991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 333 IncrementalHoareTripleChecker+Valid, 658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-19 08:36:25,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [887 Valid, 973 Invalid, 991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [333 Valid, 658 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-19 08:36:25,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2022-11-19 08:36:25,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 529. [2022-11-19 08:36:25,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 377 states have (on average 1.3315649867374004) internal successors, (502), 381 states have internal predecessors, (502), 89 states have call successors, (89), 62 states have call predecessors, (89), 61 states have return successors, (102), 87 states have call predecessors, (102), 87 states have call successors, (102) [2022-11-19 08:36:25,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 693 transitions. [2022-11-19 08:36:25,199 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 693 transitions. Word has length 45 [2022-11-19 08:36:25,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:36:25,200 INFO L495 AbstractCegarLoop]: Abstraction has 529 states and 693 transitions. [2022-11-19 08:36:25,200 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 08:36:25,200 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 693 transitions. [2022-11-19 08:36:25,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-19 08:36:25,202 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:36:25,202 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 08:36:25,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 08:36:25,203 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:36:25,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:36:25,204 INFO L85 PathProgramCache]: Analyzing trace with hash 2076916579, now seen corresponding path program 1 times [2022-11-19 08:36:25,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:36:25,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794304678] [2022-11-19 08:36:25,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:36:25,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:36:25,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:36:25,500 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 08:36:25,501 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:36:25,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794304678] [2022-11-19 08:36:25,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794304678] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:36:25,503 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:36:25,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-19 08:36:25,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329471000] [2022-11-19 08:36:25,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:36:25,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 08:36:25,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:36:25,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 08:36:25,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-19 08:36:25,517 INFO L87 Difference]: Start difference. First operand 529 states and 693 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 08:36:26,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:36:26,330 INFO L93 Difference]: Finished difference Result 1290 states and 1640 transitions. [2022-11-19 08:36:26,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-19 08:36:26,331 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 08:36:26,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:36:26,336 INFO L225 Difference]: With dead ends: 1290 [2022-11-19 08:36:26,336 INFO L226 Difference]: Without dead ends: 887 [2022-11-19 08:36:26,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-19 08:36:26,340 INFO L413 NwaCegarLoop]: 156 mSDtfsCounter, 402 mSDsluCounter, 541 mSDsCounter, 0 mSdLazyCounter, 742 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 697 SdHoareTripleChecker+Invalid, 844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 08:36:26,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [427 Valid, 697 Invalid, 844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 742 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 08:36:26,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 887 states. [2022-11-19 08:36:26,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 887 to 858. [2022-11-19 08:36:26,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 858 states, 600 states have (on average 1.2883333333333333) internal successors, (773), 605 states have internal predecessors, (773), 145 states have call successors, (145), 110 states have call predecessors, (145), 111 states have return successors, (176), 144 states have call predecessors, (176), 143 states have call successors, (176) [2022-11-19 08:36:26,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 1094 transitions. [2022-11-19 08:36:26,424 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 1094 transitions. Word has length 46 [2022-11-19 08:36:26,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:36:26,424 INFO L495 AbstractCegarLoop]: Abstraction has 858 states and 1094 transitions. [2022-11-19 08:36:26,424 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 08:36:26,425 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 1094 transitions. [2022-11-19 08:36:26,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-19 08:36:26,426 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:36:26,426 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 08:36:26,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 08:36:26,427 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:36:26,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:36:26,427 INFO L85 PathProgramCache]: Analyzing trace with hash 642876851, now seen corresponding path program 1 times [2022-11-19 08:36:26,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:36:26,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869355533] [2022-11-19 08:36:26,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:36:26,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:36:26,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:36:26,478 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 08:36:26,478 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:36:26,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869355533] [2022-11-19 08:36:26,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869355533] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:36:26,479 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:36:26,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:36:26,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571110252] [2022-11-19 08:36:26,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:36:26,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:36:26,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:36:26,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:36:26,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:36:26,481 INFO L87 Difference]: Start difference. First operand 858 states and 1094 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 08:36:26,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:36:26,654 INFO L93 Difference]: Finished difference Result 1799 states and 2253 transitions. [2022-11-19 08:36:26,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:36:26,655 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 08:36:26,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:36:26,661 INFO L225 Difference]: With dead ends: 1799 [2022-11-19 08:36:26,661 INFO L226 Difference]: Without dead ends: 1117 [2022-11-19 08:36:26,663 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 08:36:26,664 INFO L413 NwaCegarLoop]: 239 mSDtfsCounter, 68 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:36:26,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 443 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:36:26,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1117 states. [2022-11-19 08:36:26,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1117 to 1095. [2022-11-19 08:36:26,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1095 states, 761 states have (on average 1.2706964520367936) internal successors, (967), 766 states have internal predecessors, (967), 187 states have call successors, (187), 148 states have call predecessors, (187), 145 states have return successors, (222), 182 states have call predecessors, (222), 185 states have call successors, (222) [2022-11-19 08:36:26,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1095 states to 1095 states and 1376 transitions. [2022-11-19 08:36:26,771 INFO L78 Accepts]: Start accepts. Automaton has 1095 states and 1376 transitions. Word has length 47 [2022-11-19 08:36:26,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:36:26,772 INFO L495 AbstractCegarLoop]: Abstraction has 1095 states and 1376 transitions. [2022-11-19 08:36:26,772 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 08:36:26,772 INFO L276 IsEmpty]: Start isEmpty. Operand 1095 states and 1376 transitions. [2022-11-19 08:36:26,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-19 08:36:26,774 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:36:26,774 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] [2022-11-19 08:36:26,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 08:36:26,775 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:36:26,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:36:26,775 INFO L85 PathProgramCache]: Analyzing trace with hash -812409199, now seen corresponding path program 1 times [2022-11-19 08:36:26,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:36:26,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964671424] [2022-11-19 08:36:26,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:36:26,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:36:26,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:36:26,876 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 08:36:26,877 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:36:26,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964671424] [2022-11-19 08:36:26,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964671424] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:36:26,877 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:36:26,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 08:36:26,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7322341] [2022-11-19 08:36:26,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:36:26,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:36:26,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:36:26,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:36:26,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:36:26,879 INFO L87 Difference]: Start difference. First operand 1095 states and 1376 transitions. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 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 08:36:27,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:36:27,763 INFO L93 Difference]: Finished difference Result 1643 states and 2253 transitions. [2022-11-19 08:36:27,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:36:27,764 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 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 49 [2022-11-19 08:36:27,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:36:27,771 INFO L225 Difference]: With dead ends: 1643 [2022-11-19 08:36:27,772 INFO L226 Difference]: Without dead ends: 1528 [2022-11-19 08:36:27,773 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 08:36:27,774 INFO L413 NwaCegarLoop]: 403 mSDtfsCounter, 893 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 232 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 904 SdHoareTripleChecker+Valid, 909 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 232 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 08:36:27,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [904 Valid, 909 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [232 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 08:36:27,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1528 states. [2022-11-19 08:36:27,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1528 to 1517. [2022-11-19 08:36:27,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1517 states, 1098 states have (on average 1.3342440801457194) internal successors, (1465), 1106 states have internal predecessors, (1465), 248 states have call successors, (248), 172 states have call predecessors, (248), 169 states have return successors, (321), 240 states have call predecessors, (321), 246 states have call successors, (321) [2022-11-19 08:36:27,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1517 states to 1517 states and 2034 transitions. [2022-11-19 08:36:27,919 INFO L78 Accepts]: Start accepts. Automaton has 1517 states and 2034 transitions. Word has length 49 [2022-11-19 08:36:27,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:36:27,919 INFO L495 AbstractCegarLoop]: Abstraction has 1517 states and 2034 transitions. [2022-11-19 08:36:27,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 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 08:36:27,920 INFO L276 IsEmpty]: Start isEmpty. Operand 1517 states and 2034 transitions. [2022-11-19 08:36:27,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-19 08:36:27,921 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:36:27,921 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 08:36:27,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 08:36:27,922 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:36:27,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:36:27,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1573877737, now seen corresponding path program 1 times [2022-11-19 08:36:27,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:36:27,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365638818] [2022-11-19 08:36:27,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:36:27,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:36:27,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:36:27,966 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 08:36:27,967 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:36:27,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365638818] [2022-11-19 08:36:27,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365638818] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:36:27,967 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:36:27,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:36:27,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595688047] [2022-11-19 08:36:27,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:36:27,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:36:27,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:36:27,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:36:27,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:36:27,969 INFO L87 Difference]: Start difference. First operand 1517 states and 2034 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 08:36:28,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:36:28,147 INFO L93 Difference]: Finished difference Result 1923 states and 2524 transitions. [2022-11-19 08:36:28,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:36:28,147 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 08:36:28,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:36:28,154 INFO L225 Difference]: With dead ends: 1923 [2022-11-19 08:36:28,155 INFO L226 Difference]: Without dead ends: 1368 [2022-11-19 08:36:28,156 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 08:36:28,157 INFO L413 NwaCegarLoop]: 237 mSDtfsCounter, 239 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:36:28,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [239 Valid, 299 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:36:28,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1368 states. [2022-11-19 08:36:28,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1368 to 1162. [2022-11-19 08:36:28,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1162 states, 862 states have (on average 1.3480278422273781) internal successors, (1162), 869 states have internal predecessors, (1162), 185 states have call successors, (185), 118 states have call predecessors, (185), 113 states have return successors, (229), 176 states have call predecessors, (229), 183 states have call successors, (229) [2022-11-19 08:36:28,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1162 states to 1162 states and 1576 transitions. [2022-11-19 08:36:28,281 INFO L78 Accepts]: Start accepts. Automaton has 1162 states and 1576 transitions. Word has length 53 [2022-11-19 08:36:28,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:36:28,281 INFO L495 AbstractCegarLoop]: Abstraction has 1162 states and 1576 transitions. [2022-11-19 08:36:28,282 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 08:36:28,282 INFO L276 IsEmpty]: Start isEmpty. Operand 1162 states and 1576 transitions. [2022-11-19 08:36:28,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-19 08:36:28,284 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:36:28,284 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 08:36:28,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-19 08:36:28,285 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:36:28,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:36:28,285 INFO L85 PathProgramCache]: Analyzing trace with hash -2117510783, now seen corresponding path program 1 times [2022-11-19 08:36:28,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:36:28,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933580912] [2022-11-19 08:36:28,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:36:28,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:36:28,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:36:28,417 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 08:36:28,420 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:36:28,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933580912] [2022-11-19 08:36:28,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933580912] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:36:28,421 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:36:28,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:36:28,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650528200] [2022-11-19 08:36:28,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:36:28,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:36:28,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:36:28,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:36:28,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:36:28,425 INFO L87 Difference]: Start difference. First operand 1162 states and 1576 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 08:36:28,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:36:28,769 INFO L93 Difference]: Finished difference Result 1417 states and 1877 transitions. [2022-11-19 08:36:28,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:36:28,770 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 08:36:28,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:36:28,777 INFO L225 Difference]: With dead ends: 1417 [2022-11-19 08:36:28,777 INFO L226 Difference]: Without dead ends: 1414 [2022-11-19 08:36:28,779 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 08:36:28,779 INFO L413 NwaCegarLoop]: 235 mSDtfsCounter, 441 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 441 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:36:28,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [441 Valid, 278 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:36:28,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1414 states. [2022-11-19 08:36:28,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1414 to 1161. [2022-11-19 08:36:28,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1161 states, 862 states have (on average 1.3410672853828307) internal successors, (1156), 868 states have internal predecessors, (1156), 184 states have call successors, (184), 118 states have call predecessors, (184), 113 states have return successors, (229), 176 states have call predecessors, (229), 183 states have call successors, (229) [2022-11-19 08:36:28,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1161 states to 1161 states and 1569 transitions. [2022-11-19 08:36:28,908 INFO L78 Accepts]: Start accepts. Automaton has 1161 states and 1569 transitions. Word has length 54 [2022-11-19 08:36:28,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:36:28,909 INFO L495 AbstractCegarLoop]: Abstraction has 1161 states and 1569 transitions. [2022-11-19 08:36:28,909 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 08:36:28,909 INFO L276 IsEmpty]: Start isEmpty. Operand 1161 states and 1569 transitions. [2022-11-19 08:36:28,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-19 08:36:28,910 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:36:28,911 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 08:36:28,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-19 08:36:28,911 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:36:28,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:36:28,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1219318372, now seen corresponding path program 1 times [2022-11-19 08:36:28,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:36:28,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397061912] [2022-11-19 08:36:28,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:36:28,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:36:28,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:36:29,035 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 08:36:29,035 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:36:29,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397061912] [2022-11-19 08:36:29,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397061912] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:36:29,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871961931] [2022-11-19 08:36:29,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:36:29,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:36:29,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc03a73-2ade-4b4a-97fe-df129a3aa82a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:36:29,039 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc03a73-2ade-4b4a-97fe-df129a3aa82a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:36:29,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc03a73-2ade-4b4a-97fe-df129a3aa82a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 08:36:29,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:36:29,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 08:36:29,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:36:29,569 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 08:36:29,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:36:29,815 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 08:36:29,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871961931] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:36:29,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1513232521] [2022-11-19 08:36:29,842 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2022-11-19 08:36:29,842 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:36:29,847 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:36:29,852 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:36:29,855 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:36:34,638 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 145 for LOIs [2022-11-19 08:36:34,668 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 141 for LOIs [2022-11-19 08:36:34,691 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 149 for LOIs [2022-11-19 08:36:35,256 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 145 for LOIs [2022-11-19 08:36:35,329 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 145 for LOIs [2022-11-19 08:36:35,397 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 145 for LOIs [2022-11-19 08:36:35,425 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 152 for LOIs [2022-11-19 08:36:35,452 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:36:54,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1513232521] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:36:54,646 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:36:54,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [5, 5, 4] total 44 [2022-11-19 08:36:54,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539067788] [2022-11-19 08:36:54,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:36:54,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-19 08:36:54,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:36:54,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-19 08:36:54,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1683, Unknown=0, NotChecked=0, Total=1892 [2022-11-19 08:36:54,650 INFO L87 Difference]: Start difference. First operand 1161 states and 1569 transitions. Second operand has 39 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 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 08:37:23,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:37:23,922 INFO L93 Difference]: Finished difference Result 1822 states and 2343 transitions. [2022-11-19 08:37:23,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-19 08:37:23,923 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 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 08:37:23,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:37:23,929 INFO L225 Difference]: With dead ends: 1822 [2022-11-19 08:37:23,929 INFO L226 Difference]: Without dead ends: 1209 [2022-11-19 08:37:23,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 124 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1550 ImplicationChecksByTransitivity, 39.7s TimeCoverageRelationStatistics Valid=626, Invalid=4630, Unknown=0, NotChecked=0, Total=5256 [2022-11-19 08:37:23,933 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 169 mSDsluCounter, 2164 mSDsCounter, 0 mSdLazyCounter, 4946 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 2370 SdHoareTripleChecker+Invalid, 5097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 4946 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:37:23,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 2370 Invalid, 5097 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [151 Valid, 4946 Invalid, 0 Unknown, 0 Unchecked, 8.5s Time] [2022-11-19 08:37:23,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1209 states. [2022-11-19 08:37:24,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1209 to 1194. [2022-11-19 08:37:24,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1194 states, 887 states have (on average 1.3325817361894026) internal successors, (1182), 893 states have internal predecessors, (1182), 186 states have call successors, (186), 124 states have call predecessors, (186), 119 states have return successors, (231), 178 states have call predecessors, (231), 185 states have call successors, (231) [2022-11-19 08:37:24,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1194 states to 1194 states and 1599 transitions. [2022-11-19 08:37:24,085 INFO L78 Accepts]: Start accepts. Automaton has 1194 states and 1599 transitions. Word has length 55 [2022-11-19 08:37:24,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:37:24,086 INFO L495 AbstractCegarLoop]: Abstraction has 1194 states and 1599 transitions. [2022-11-19 08:37:24,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 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 08:37:24,086 INFO L276 IsEmpty]: Start isEmpty. Operand 1194 states and 1599 transitions. [2022-11-19 08:37:24,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-19 08:37:24,088 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:37:24,088 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 08:37:24,095 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc03a73-2ade-4b4a-97fe-df129a3aa82a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-19 08:37:24,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc03a73-2ade-4b4a-97fe-df129a3aa82a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:37:24,295 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:37:24,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:37:24,296 INFO L85 PathProgramCache]: Analyzing trace with hash 153773647, now seen corresponding path program 1 times [2022-11-19 08:37:24,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:37:24,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771037285] [2022-11-19 08:37:24,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:37:24,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:37:24,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:37:24,356 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 08:37:24,357 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:37:24,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771037285] [2022-11-19 08:37:24,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771037285] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:37:24,358 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:37:24,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:37:24,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201642809] [2022-11-19 08:37:24,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:37:24,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:37:24,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:37:24,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:37:24,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:37:24,359 INFO L87 Difference]: Start difference. First operand 1194 states and 1599 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 08:37:24,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:37:24,596 INFO L93 Difference]: Finished difference Result 1776 states and 2282 transitions. [2022-11-19 08:37:24,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:37:24,597 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 08:37:24,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:37:24,604 INFO L225 Difference]: With dead ends: 1776 [2022-11-19 08:37:24,604 INFO L226 Difference]: Without dead ends: 1403 [2022-11-19 08:37:24,606 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 08:37:24,607 INFO L413 NwaCegarLoop]: 261 mSDtfsCounter, 43 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 480 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:37:24,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 480 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:37:24,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1403 states. [2022-11-19 08:37:24,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1403 to 1315. [2022-11-19 08:37:24,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1315 states, 968 states have (on average 1.3171487603305785) internal successors, (1275), 978 states have internal predecessors, (1275), 208 states have call successors, (208), 146 states have call predecessors, (208), 137 states have return successors, (253), 192 states have call predecessors, (253), 207 states have call successors, (253) [2022-11-19 08:37:24,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1315 states to 1315 states and 1736 transitions. [2022-11-19 08:37:24,764 INFO L78 Accepts]: Start accepts. Automaton has 1315 states and 1736 transitions. Word has length 61 [2022-11-19 08:37:24,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:37:24,765 INFO L495 AbstractCegarLoop]: Abstraction has 1315 states and 1736 transitions. [2022-11-19 08:37:24,765 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 08:37:24,765 INFO L276 IsEmpty]: Start isEmpty. Operand 1315 states and 1736 transitions. [2022-11-19 08:37:24,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-19 08:37:24,767 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:37:24,767 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 08:37:24,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-19 08:37:24,767 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:37:24,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:37:24,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1570574313, now seen corresponding path program 1 times [2022-11-19 08:37:24,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:37:24,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601514284] [2022-11-19 08:37:24,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:37:24,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:37:24,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:37:24,922 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 08:37:24,923 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:37:24,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601514284] [2022-11-19 08:37:24,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601514284] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:37:24,923 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:37:24,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-19 08:37:24,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506647331] [2022-11-19 08:37:24,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:37:24,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 08:37:24,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:37:24,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 08:37:24,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-19 08:37:24,925 INFO L87 Difference]: Start difference. First operand 1315 states and 1736 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 08:37:25,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:37:25,821 INFO L93 Difference]: Finished difference Result 2312 states and 2896 transitions. [2022-11-19 08:37:25,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-19 08:37:25,822 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 08:37:25,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:37:25,829 INFO L225 Difference]: With dead ends: 2312 [2022-11-19 08:37:25,829 INFO L226 Difference]: Without dead ends: 1626 [2022-11-19 08:37:25,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-19 08:37:25,832 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 381 mSDsluCounter, 628 mSDsCounter, 0 mSdLazyCounter, 785 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 776 SdHoareTripleChecker+Invalid, 885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 08:37:25,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [405 Valid, 776 Invalid, 885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 785 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 08:37:25,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1626 states. [2022-11-19 08:37:26,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1626 to 1495. [2022-11-19 08:37:26,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1495 states, 1088 states have (on average 1.2904411764705883) internal successors, (1404), 1098 states have internal predecessors, (1404), 240 states have call successors, (240), 174 states have call predecessors, (240), 165 states have return successors, (285), 224 states have call predecessors, (285), 239 states have call successors, (285) [2022-11-19 08:37:26,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1495 states to 1495 states and 1929 transitions. [2022-11-19 08:37:26,014 INFO L78 Accepts]: Start accepts. Automaton has 1495 states and 1929 transitions. Word has length 63 [2022-11-19 08:37:26,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:37:26,014 INFO L495 AbstractCegarLoop]: Abstraction has 1495 states and 1929 transitions. [2022-11-19 08:37:26,014 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 08:37:26,014 INFO L276 IsEmpty]: Start isEmpty. Operand 1495 states and 1929 transitions. [2022-11-19 08:37:26,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-19 08:37:26,016 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:37:26,016 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 08:37:26,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-19 08:37:26,016 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:37:26,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:37:26,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1929013174, now seen corresponding path program 1 times [2022-11-19 08:37:26,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:37:26,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710076094] [2022-11-19 08:37:26,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:37:26,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:37:26,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:37:26,141 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 08:37:26,142 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:37:26,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710076094] [2022-11-19 08:37:26,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710076094] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:37:26,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512247264] [2022-11-19 08:37:26,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:37:26,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:37:26,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc03a73-2ade-4b4a-97fe-df129a3aa82a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:37:26,144 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc03a73-2ade-4b4a-97fe-df129a3aa82a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:37:26,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc03a73-2ade-4b4a-97fe-df129a3aa82a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 08:37:26,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:37:26,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 08:37:26,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:37:26,528 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 08:37:26,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:37:26,741 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 08:37:26,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512247264] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:37:26,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [4436031] [2022-11-19 08:37:26,748 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2022-11-19 08:37:26,748 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:37:26,749 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:37:26,750 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:37:26,750 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:37:35,047 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 145 for LOIs [2022-11-19 08:37:35,072 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 111 for LOIs [2022-11-19 08:37:35,079 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 204 for LOIs [2022-11-19 08:37:35,140 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 149 for LOIs [2022-11-19 08:37:35,583 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 145 for LOIs [2022-11-19 08:37:35,621 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 145 for LOIs [2022-11-19 08:37:35,674 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 145 for LOIs [2022-11-19 08:37:35,693 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 152 for LOIs [2022-11-19 08:37:35,708 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:37:59,495 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '37905#(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) (= ~t1_pc~0 0) (= ~T4_E~0 2) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~T5_E~0 2) (<= 0 ~p_dw_pc~0) (= ~m_st~0 0) (= ~E_5~0 2) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (= 0 ~t6_pc~0) (= 0 ~t5_st~0) (= ~E_3~0 2) (= 0 ~t3_pc~0) (= 0 ~t6_st~0) (= ~t2_i~0 0) (= ~E_6~0 2) (= ~t4_i~0 0) (= ~t1_st~0 0) (= ~c_num_read~0 1) (= ~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) (= ~token~0 0) (= ~c_dr_pc~0 0) (= ~m_pc~0 0) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (= |#NULL.offset| 0) (= ~c_last_read~0 ~p_last_write~0) (= ~E_M~0 2) (= ~a_t~0 0) (= 0 ~t2_st~0) (= 0 ~t4_pc~0) (= ~E_1~0 2) (= 0 ~t3_st~0) (= ~M_E~0 2) (<= 0 |#StackHeapBarrier|) (= ~c_dr_st~0 1) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-11-19 08:37:59,495 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:37:59,495 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:37:59,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2022-11-19 08:37:59,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157493621] [2022-11-19 08:37:59,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:37:59,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 08:37:59,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:37:59,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 08:37:59,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=1924, Unknown=0, NotChecked=0, Total=2162 [2022-11-19 08:37:59,498 INFO L87 Difference]: Start difference. First operand 1495 states and 1929 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 08:38:00,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:38:00,406 INFO L93 Difference]: Finished difference Result 3702 states and 4458 transitions. [2022-11-19 08:38:00,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 08:38:00,407 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 08:38:00,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:38:00,423 INFO L225 Difference]: With dead ends: 3702 [2022-11-19 08:38:00,423 INFO L226 Difference]: Without dead ends: 3699 [2022-11-19 08:38:00,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 146 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 958 ImplicationChecksByTransitivity, 23.8s TimeCoverageRelationStatistics Valid=238, Invalid=1924, Unknown=0, NotChecked=0, Total=2162 [2022-11-19 08:38:00,426 INFO L413 NwaCegarLoop]: 349 mSDtfsCounter, 532 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 486 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 532 SdHoareTripleChecker+Valid, 880 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:38:00,427 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [532 Valid, 880 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 486 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 08:38:00,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3699 states. [2022-11-19 08:38:00,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3699 to 2810. [2022-11-19 08:38:00,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2810 states, 1980 states have (on average 1.2353535353535354) internal successors, (2446), 1998 states have internal predecessors, (2446), 467 states have call successors, (467), 378 states have call predecessors, (467), 361 states have return successors, (524), 435 states have call predecessors, (524), 466 states have call successors, (524) [2022-11-19 08:38:00,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2810 states to 2810 states and 3437 transitions. [2022-11-19 08:38:00,853 INFO L78 Accepts]: Start accepts. Automaton has 2810 states and 3437 transitions. Word has length 64 [2022-11-19 08:38:00,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:38:00,854 INFO L495 AbstractCegarLoop]: Abstraction has 2810 states and 3437 transitions. [2022-11-19 08:38:00,854 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 08:38:00,854 INFO L276 IsEmpty]: Start isEmpty. Operand 2810 states and 3437 transitions. [2022-11-19 08:38:00,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-19 08:38:00,858 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:38:00,858 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 08:38:00,869 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc03a73-2ade-4b4a-97fe-df129a3aa82a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 08:38:01,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc03a73-2ade-4b4a-97fe-df129a3aa82a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-19 08:38:01,069 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:38:01,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:38:01,070 INFO L85 PathProgramCache]: Analyzing trace with hash 315149361, now seen corresponding path program 2 times [2022-11-19 08:38:01,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:38:01,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265656524] [2022-11-19 08:38:01,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:38:01,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:38:01,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:38:01,109 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 08:38:01,110 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:38:01,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265656524] [2022-11-19 08:38:01,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265656524] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:38:01,110 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:38:01,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:38:01,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598818254] [2022-11-19 08:38:01,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:38:01,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:38:01,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:38:01,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:38:01,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:38:01,112 INFO L87 Difference]: Start difference. First operand 2810 states and 3437 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 08:38:01,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:38:01,512 INFO L93 Difference]: Finished difference Result 4006 states and 4809 transitions. [2022-11-19 08:38:01,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:38:01,513 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 08:38:01,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:38:01,522 INFO L225 Difference]: With dead ends: 4006 [2022-11-19 08:38:01,523 INFO L226 Difference]: Without dead ends: 2068 [2022-11-19 08:38:01,527 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 08:38:01,528 INFO L413 NwaCegarLoop]: 270 mSDtfsCounter, 244 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:38:01,528 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 337 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:38:01,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2068 states. [2022-11-19 08:38:01,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2068 to 2052. [2022-11-19 08:38:01,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2052 states, 1474 states have (on average 1.2476255088195387) internal successors, (1839), 1484 states have internal predecessors, (1839), 331 states have call successors, (331), 254 states have call predecessors, (331), 245 states have return successors, (380), 315 states have call predecessors, (380), 330 states have call successors, (380) [2022-11-19 08:38:01,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2052 states to 2052 states and 2550 transitions. [2022-11-19 08:38:01,843 INFO L78 Accepts]: Start accepts. Automaton has 2052 states and 2550 transitions. Word has length 67 [2022-11-19 08:38:01,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:38:01,843 INFO L495 AbstractCegarLoop]: Abstraction has 2052 states and 2550 transitions. [2022-11-19 08:38:01,844 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 08:38:01,844 INFO L276 IsEmpty]: Start isEmpty. Operand 2052 states and 2550 transitions. [2022-11-19 08:38:01,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-19 08:38:01,849 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:38:01,850 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 08:38:01,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-19 08:38:01,850 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:38:01,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:38:01,851 INFO L85 PathProgramCache]: Analyzing trace with hash 2138695311, now seen corresponding path program 1 times [2022-11-19 08:38:01,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:38:01,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622861514] [2022-11-19 08:38:01,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:38:01,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:38:01,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:38:01,918 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 08:38:01,918 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:38:01,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622861514] [2022-11-19 08:38:01,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622861514] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:38:01,919 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:38:01,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:38:01,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667665330] [2022-11-19 08:38:01,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:38:01,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:38:01,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:38:01,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:38:01,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:38:01,920 INFO L87 Difference]: Start difference. First operand 2052 states and 2550 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 08:38:02,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:38:02,338 INFO L93 Difference]: Finished difference Result 3649 states and 4378 transitions. [2022-11-19 08:38:02,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:38:02,339 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 08:38:02,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:38:02,348 INFO L225 Difference]: With dead ends: 3649 [2022-11-19 08:38:02,348 INFO L226 Difference]: Without dead ends: 2270 [2022-11-19 08:38:02,352 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 08:38:02,352 INFO L413 NwaCegarLoop]: 254 mSDtfsCounter, 38 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:38:02,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 473 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:38:02,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2270 states. [2022-11-19 08:38:02,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2270 to 2189. [2022-11-19 08:38:02,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2189 states, 1571 states have (on average 1.241884150222788) internal successors, (1951), 1587 states have internal predecessors, (1951), 352 states have call successors, (352), 275 states have call predecessors, (352), 264 states have return successors, (407), 328 states have call predecessors, (407), 351 states have call successors, (407) [2022-11-19 08:38:02,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2189 states to 2189 states and 2710 transitions. [2022-11-19 08:38:02,690 INFO L78 Accepts]: Start accepts. Automaton has 2189 states and 2710 transitions. Word has length 71 [2022-11-19 08:38:02,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:38:02,690 INFO L495 AbstractCegarLoop]: Abstraction has 2189 states and 2710 transitions. [2022-11-19 08:38:02,691 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 08:38:02,691 INFO L276 IsEmpty]: Start isEmpty. Operand 2189 states and 2710 transitions. [2022-11-19 08:38:02,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-19 08:38:02,693 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:38:02,694 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 08:38:02,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-19 08:38:02,694 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:38:02,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:38:02,695 INFO L85 PathProgramCache]: Analyzing trace with hash -2118164225, now seen corresponding path program 1 times [2022-11-19 08:38:02,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:38:02,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952503210] [2022-11-19 08:38:02,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:38:02,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:38:02,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:38:03,058 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 08:38:03,059 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:38:03,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952503210] [2022-11-19 08:38:03,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952503210] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:38:03,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707435850] [2022-11-19 08:38:03,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:38:03,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:38:03,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc03a73-2ade-4b4a-97fe-df129a3aa82a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:38:03,065 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc03a73-2ade-4b4a-97fe-df129a3aa82a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:38:03,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc03a73-2ade-4b4a-97fe-df129a3aa82a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 08:38:03,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:38:03,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-19 08:38:03,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:38:03,280 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 08:38:03,281 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:38:03,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707435850] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:38:03,281 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:38:03,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [14] total 17 [2022-11-19 08:38:03,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514753642] [2022-11-19 08:38:03,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:38:03,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 08:38:03,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:38:03,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 08:38:03,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-11-19 08:38:03,283 INFO L87 Difference]: Start difference. First operand 2189 states and 2710 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 08:38:03,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:38:03,828 INFO L93 Difference]: Finished difference Result 3589 states and 4366 transitions. [2022-11-19 08:38:03,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 08:38:03,828 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 08:38:03,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:38:03,837 INFO L225 Difference]: With dead ends: 3589 [2022-11-19 08:38:03,837 INFO L226 Difference]: Without dead ends: 1970 [2022-11-19 08:38:03,841 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 08:38:03,841 INFO L413 NwaCegarLoop]: 267 mSDtfsCounter, 237 mSDsluCounter, 804 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 1071 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:38:03,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [239 Valid, 1071 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:38:03,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1970 states. [2022-11-19 08:38:04,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1970 to 1682. [2022-11-19 08:38:04,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1682 states, 1255 states have (on average 1.2701195219123507) internal successors, (1594), 1269 states have internal predecessors, (1594), 248 states have call successors, (248), 184 states have call predecessors, (248), 177 states have return successors, (297), 230 states have call predecessors, (297), 247 states have call successors, (297) [2022-11-19 08:38:04,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1682 states to 1682 states and 2139 transitions. [2022-11-19 08:38:04,103 INFO L78 Accepts]: Start accepts. Automaton has 1682 states and 2139 transitions. Word has length 102 [2022-11-19 08:38:04,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:38:04,103 INFO L495 AbstractCegarLoop]: Abstraction has 1682 states and 2139 transitions. [2022-11-19 08:38:04,119 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 08:38:04,119 INFO L276 IsEmpty]: Start isEmpty. Operand 1682 states and 2139 transitions. [2022-11-19 08:38:04,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-19 08:38:04,122 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:38:04,122 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:38:04,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc03a73-2ade-4b4a-97fe-df129a3aa82a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 08:38:04,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc03a73-2ade-4b4a-97fe-df129a3aa82a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-19 08:38:04,328 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:38:04,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:38:04,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1108855109, now seen corresponding path program 1 times [2022-11-19 08:38:04,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:38:04,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453170128] [2022-11-19 08:38:04,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:38:04,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:38:04,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:38:04,446 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 08:38:04,446 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:38:04,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453170128] [2022-11-19 08:38:04,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453170128] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:38:04,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132417690] [2022-11-19 08:38:04,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:38:04,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:38:04,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc03a73-2ade-4b4a-97fe-df129a3aa82a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:38:04,448 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc03a73-2ade-4b4a-97fe-df129a3aa82a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:38:04,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc03a73-2ade-4b4a-97fe-df129a3aa82a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 08:38:04,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:38:04,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 636 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 08:38:04,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:38:04,675 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-19 08:38:04,676 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:38:04,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132417690] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:38:04,676 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:38:04,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-19 08:38:04,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429765374] [2022-11-19 08:38:04,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:38:04,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:38:04,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:38:04,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:38:04,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:38:04,679 INFO L87 Difference]: Start difference. First operand 1682 states and 2139 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 2 states have internal predecessors, (64), 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 08:38:05,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:38:05,041 INFO L93 Difference]: Finished difference Result 2740 states and 3841 transitions. [2022-11-19 08:38:05,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:38:05,042 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 2 states have internal predecessors, (64), 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 94 [2022-11-19 08:38:05,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:38:05,052 INFO L225 Difference]: With dead ends: 2740 [2022-11-19 08:38:05,052 INFO L226 Difference]: Without dead ends: 2203 [2022-11-19 08:38:05,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 94 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 08:38:05,056 INFO L413 NwaCegarLoop]: 237 mSDtfsCounter, 235 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:38:05,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 373 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:38:05,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2203 states. [2022-11-19 08:38:05,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2203 to 2196. [2022-11-19 08:38:05,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2196 states, 1667 states have (on average 1.3179364127174564) internal successors, (2197), 1684 states have internal predecessors, (2197), 320 states have call successors, (320), 214 states have call predecessors, (320), 207 states have return successors, (403), 299 states have call predecessors, (403), 319 states have call successors, (403) [2022-11-19 08:38:05,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2196 states to 2196 states and 2920 transitions. [2022-11-19 08:38:05,382 INFO L78 Accepts]: Start accepts. Automaton has 2196 states and 2920 transitions. Word has length 94 [2022-11-19 08:38:05,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:38:05,382 INFO L495 AbstractCegarLoop]: Abstraction has 2196 states and 2920 transitions. [2022-11-19 08:38:05,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 2 states have internal predecessors, (64), 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 08:38:05,382 INFO L276 IsEmpty]: Start isEmpty. Operand 2196 states and 2920 transitions. [2022-11-19 08:38:05,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-19 08:38:05,386 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:38:05,386 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:38:05,400 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc03a73-2ade-4b4a-97fe-df129a3aa82a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 08:38:05,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc03a73-2ade-4b4a-97fe-df129a3aa82a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:38:05,600 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:38:05,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:38:05,601 INFO L85 PathProgramCache]: Analyzing trace with hash 72508517, now seen corresponding path program 1 times [2022-11-19 08:38:05,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:38:05,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304306627] [2022-11-19 08:38:05,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:38:05,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:38:05,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:38:05,716 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 08:38:05,717 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:38:05,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304306627] [2022-11-19 08:38:05,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304306627] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:38:05,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799281874] [2022-11-19 08:38:05,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:38:05,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:38:05,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc03a73-2ade-4b4a-97fe-df129a3aa82a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:38:05,719 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc03a73-2ade-4b4a-97fe-df129a3aa82a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:38:05,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc03a73-2ade-4b4a-97fe-df129a3aa82a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 08:38:05,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:38:05,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 630 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 08:38:05,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:38:05,940 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 08:38:05,941 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:38:05,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799281874] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:38:05,941 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:38:05,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-19 08:38:05,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819554103] [2022-11-19 08:38:05,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:38:05,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:38:05,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:38:05,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:38:05,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:38:05,943 INFO L87 Difference]: Start difference. First operand 2196 states and 2920 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 2 states have internal predecessors, (70), 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 08:38:06,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:38:06,434 INFO L93 Difference]: Finished difference Result 4267 states and 6222 transitions. [2022-11-19 08:38:06,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:38:06,435 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 2 states have internal predecessors, (70), 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 94 [2022-11-19 08:38:06,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:38:06,451 INFO L225 Difference]: With dead ends: 4267 [2022-11-19 08:38:06,451 INFO L226 Difference]: Without dead ends: 3216 [2022-11-19 08:38:06,456 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 94 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 08:38:06,457 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 229 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:38:06,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 370 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:38:06,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3216 states. [2022-11-19 08:38:06,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3216 to 3204. [2022-11-19 08:38:06,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3204 states, 2476 states have (on average 1.3622778675282714) internal successors, (3373), 2499 states have internal predecessors, (3373), 459 states have call successors, (459), 274 states have call predecessors, (459), 267 states have return successors, (606), 432 states have call predecessors, (606), 458 states have call successors, (606) [2022-11-19 08:38:06,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3204 states to 3204 states and 4438 transitions. [2022-11-19 08:38:06,905 INFO L78 Accepts]: Start accepts. Automaton has 3204 states and 4438 transitions. Word has length 94 [2022-11-19 08:38:06,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:38:06,906 INFO L495 AbstractCegarLoop]: Abstraction has 3204 states and 4438 transitions. [2022-11-19 08:38:06,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 2 states have internal predecessors, (70), 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 08:38:06,906 INFO L276 IsEmpty]: Start isEmpty. Operand 3204 states and 4438 transitions. [2022-11-19 08:38:06,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-19 08:38:06,911 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:38:06,911 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:38:06,923 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc03a73-2ade-4b4a-97fe-df129a3aa82a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 08:38:07,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc03a73-2ade-4b4a-97fe-df129a3aa82a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-19 08:38:07,118 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:38:07,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:38:07,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1088935813, now seen corresponding path program 1 times [2022-11-19 08:38:07,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:38:07,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417907920] [2022-11-19 08:38:07,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:38:07,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:38:07,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:38:07,244 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 08:38:07,245 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:38:07,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417907920] [2022-11-19 08:38:07,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417907920] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:38:07,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638665630] [2022-11-19 08:38:07,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:38:07,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:38:07,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc03a73-2ade-4b4a-97fe-df129a3aa82a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:38:07,247 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc03a73-2ade-4b4a-97fe-df129a3aa82a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:38:07,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc03a73-2ade-4b4a-97fe-df129a3aa82a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 08:38:07,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:38:07,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 624 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 08:38:07,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:38:07,447 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-19 08:38:07,447 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:38:07,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638665630] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:38:07,447 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:38:07,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-19 08:38:07,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831649703] [2022-11-19 08:38:07,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:38:07,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:38:07,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:38:07,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:38:07,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:38:07,449 INFO L87 Difference]: Start difference. First operand 3204 states and 4438 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 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 08:38:08,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:38:08,137 INFO L93 Difference]: Finished difference Result 7261 states and 10843 transitions. [2022-11-19 08:38:08,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:38:08,138 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 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 94 [2022-11-19 08:38:08,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:38:08,177 INFO L225 Difference]: With dead ends: 7261 [2022-11-19 08:38:08,177 INFO L226 Difference]: Without dead ends: 5202 [2022-11-19 08:38:08,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 94 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 08:38:08,186 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 238 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:38:08,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 370 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:38:08,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5202 states. [2022-11-19 08:38:08,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5202 to 5180. [2022-11-19 08:38:08,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5180 states, 4064 states have (on average 1.3939468503937007) internal successors, (5665), 4099 states have internal predecessors, (5665), 727 states have call successors, (727), 394 states have call predecessors, (727), 387 states have return successors, (994), 688 states have call predecessors, (994), 726 states have call successors, (994) [2022-11-19 08:38:08,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5180 states to 5180 states and 7386 transitions. [2022-11-19 08:38:08,853 INFO L78 Accepts]: Start accepts. Automaton has 5180 states and 7386 transitions. Word has length 94 [2022-11-19 08:38:08,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:38:08,854 INFO L495 AbstractCegarLoop]: Abstraction has 5180 states and 7386 transitions. [2022-11-19 08:38:08,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 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 08:38:08,854 INFO L276 IsEmpty]: Start isEmpty. Operand 5180 states and 7386 transitions. [2022-11-19 08:38:08,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-19 08:38:08,861 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:38:08,861 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:38:08,872 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc03a73-2ade-4b4a-97fe-df129a3aa82a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-19 08:38:09,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc03a73-2ade-4b4a-97fe-df129a3aa82a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-19 08:38:09,067 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:38:09,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:38:09,067 INFO L85 PathProgramCache]: Analyzing trace with hash -487462811, now seen corresponding path program 1 times [2022-11-19 08:38:09,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:38:09,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943807860] [2022-11-19 08:38:09,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:38:09,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:38:09,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:38:09,162 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-19 08:38:09,162 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:38:09,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943807860] [2022-11-19 08:38:09,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943807860] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:38:09,162 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:38:09,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:38:09,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66074575] [2022-11-19 08:38:09,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:38:09,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:38:09,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:38:09,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:38:09,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:38:09,164 INFO L87 Difference]: Start difference. First operand 5180 states and 7386 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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 08:38:10,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:38:10,036 INFO L93 Difference]: Finished difference Result 9342 states and 13943 transitions. [2022-11-19 08:38:10,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:38:10,036 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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 94 [2022-11-19 08:38:10,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:38:10,061 INFO L225 Difference]: With dead ends: 9342 [2022-11-19 08:38:10,061 INFO L226 Difference]: Without dead ends: 6108 [2022-11-19 08:38:10,071 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 08:38:10,072 INFO L413 NwaCegarLoop]: 297 mSDtfsCounter, 74 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:38:10,072 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 523 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:38:10,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6108 states. [2022-11-19 08:38:10,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6108 to 5740. [2022-11-19 08:38:10,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5740 states, 4592 states have (on average 1.4305313588850175) internal successors, (6569), 4627 states have internal predecessors, (6569), 743 states have call successors, (743), 410 states have call predecessors, (743), 403 states have return successors, (1010), 704 states have call predecessors, (1010), 742 states have call successors, (1010) [2022-11-19 08:38:10,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5740 states to 5740 states and 8322 transitions. [2022-11-19 08:38:10,839 INFO L78 Accepts]: Start accepts. Automaton has 5740 states and 8322 transitions. Word has length 94 [2022-11-19 08:38:10,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:38:10,839 INFO L495 AbstractCegarLoop]: Abstraction has 5740 states and 8322 transitions. [2022-11-19 08:38:10,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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 08:38:10,839 INFO L276 IsEmpty]: Start isEmpty. Operand 5740 states and 8322 transitions. [2022-11-19 08:38:10,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-19 08:38:10,851 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:38:10,851 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 08:38:10,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-19 08:38:10,852 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:38:10,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:38:10,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1520395879, now seen corresponding path program 1 times [2022-11-19 08:38:10,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:38:10,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621214291] [2022-11-19 08:38:10,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:38:10,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:38:10,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:38:11,040 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 08:38:11,040 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:38:11,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621214291] [2022-11-19 08:38:11,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621214291] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:38:11,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608729472] [2022-11-19 08:38:11,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:38:11,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:38:11,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc03a73-2ade-4b4a-97fe-df129a3aa82a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:38:11,045 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc03a73-2ade-4b4a-97fe-df129a3aa82a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:38:11,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc03a73-2ade-4b4a-97fe-df129a3aa82a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 08:38:11,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:38:11,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 08:38:11,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:38:11,275 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 08:38:11,275 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:38:11,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608729472] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:38:11,276 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:38:11,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2022-11-19 08:38:11,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944480524] [2022-11-19 08:38:11,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:38:11,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 08:38:11,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:38:11,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 08:38:11,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-11-19 08:38:11,278 INFO L87 Difference]: Start difference. First operand 5740 states and 8322 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 08:38:12,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:38:12,014 INFO L93 Difference]: Finished difference Result 6526 states and 9217 transitions. [2022-11-19 08:38:12,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 08:38:12,014 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 08:38:12,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:38:12,032 INFO L225 Difference]: With dead ends: 6526 [2022-11-19 08:38:12,032 INFO L226 Difference]: Without dead ends: 5468 [2022-11-19 08:38:12,036 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 08:38:12,037 INFO L413 NwaCegarLoop]: 268 mSDtfsCounter, 72 mSDsluCounter, 804 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 1072 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:38:12,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 1072 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:38:12,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5468 states. [2022-11-19 08:38:12,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5468 to 5350. [2022-11-19 08:38:12,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5350 states, 4312 states have (on average 1.4471243042671613) internal successors, (6240), 4341 states have internal predecessors, (6240), 684 states have call successors, (684), 355 states have call predecessors, (684), 352 states have return successors, (941), 655 states have call predecessors, (941), 683 states have call successors, (941) [2022-11-19 08:38:12,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5350 states to 5350 states and 7865 transitions. [2022-11-19 08:38:12,681 INFO L78 Accepts]: Start accepts. Automaton has 5350 states and 7865 transitions. Word has length 112 [2022-11-19 08:38:12,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:38:12,681 INFO L495 AbstractCegarLoop]: Abstraction has 5350 states and 7865 transitions. [2022-11-19 08:38:12,682 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 08:38:12,682 INFO L276 IsEmpty]: Start isEmpty. Operand 5350 states and 7865 transitions. [2022-11-19 08:38:12,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-19 08:38:12,697 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:38:12,697 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 08:38:12,708 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc03a73-2ade-4b4a-97fe-df129a3aa82a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-19 08:38:12,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc03a73-2ade-4b4a-97fe-df129a3aa82a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-19 08:38:12,903 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:38:12,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:38:12,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1172327930, now seen corresponding path program 1 times [2022-11-19 08:38:12,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:38:12,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25650324] [2022-11-19 08:38:12,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:38:12,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:38:12,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:38:12,979 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 08:38:12,979 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:38:12,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25650324] [2022-11-19 08:38:12,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25650324] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:38:12,979 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:38:12,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:38:12,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080774649] [2022-11-19 08:38:12,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:38:12,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:38:12,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:38:12,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:38:12,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:38:12,983 INFO L87 Difference]: Start difference. First operand 5350 states and 7865 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 08:38:13,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:38:13,691 INFO L93 Difference]: Finished difference Result 5843 states and 8423 transitions. [2022-11-19 08:38:13,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:38:13,692 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 08:38:13,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:38:13,710 INFO L225 Difference]: With dead ends: 5843 [2022-11-19 08:38:13,710 INFO L226 Difference]: Without dead ends: 5217 [2022-11-19 08:38:13,714 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 08:38:13,714 INFO L413 NwaCegarLoop]: 260 mSDtfsCounter, 290 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:38:13,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [290 Valid, 437 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:38:13,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5217 states. [2022-11-19 08:38:14,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5217 to 5170. [2022-11-19 08:38:14,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5170 states, 4184 states have (on average 1.4557839388145315) internal successors, (6091), 4211 states have internal predecessors, (6091), 656 states have call successors, (656), 329 states have call predecessors, (656), 328 states have return successors, (911), 631 states have call predecessors, (911), 655 states have call successors, (911) [2022-11-19 08:38:14,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5170 states to 5170 states and 7658 transitions. [2022-11-19 08:38:14,574 INFO L78 Accepts]: Start accepts. Automaton has 5170 states and 7658 transitions. Word has length 113 [2022-11-19 08:38:14,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:38:14,575 INFO L495 AbstractCegarLoop]: Abstraction has 5170 states and 7658 transitions. [2022-11-19 08:38:14,575 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 08:38:14,575 INFO L276 IsEmpty]: Start isEmpty. Operand 5170 states and 7658 transitions. [2022-11-19 08:38:14,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-19 08:38:14,587 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:38:14,587 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 08:38:14,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-19 08:38:14,588 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:38:14,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:38:14,588 INFO L85 PathProgramCache]: Analyzing trace with hash 2129256313, now seen corresponding path program 1 times [2022-11-19 08:38:14,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:38:14,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437799533] [2022-11-19 08:38:14,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:38:14,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:38:14,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:38:14,764 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 08:38:14,764 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:38:14,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437799533] [2022-11-19 08:38:14,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437799533] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:38:14,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477076315] [2022-11-19 08:38:14,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:38:14,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:38:14,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc03a73-2ade-4b4a-97fe-df129a3aa82a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:38:14,767 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc03a73-2ade-4b4a-97fe-df129a3aa82a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:38:14,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc03a73-2ade-4b4a-97fe-df129a3aa82a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-19 08:38:14,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:38:14,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 08:38:14,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:38:14,989 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 08:38:14,989 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:38:14,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477076315] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:38:14,990 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:38:14,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 11 [2022-11-19 08:38:14,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165534528] [2022-11-19 08:38:14,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:38:14,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 08:38:14,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:38:14,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 08:38:14,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-19 08:38:14,992 INFO L87 Difference]: Start difference. First operand 5170 states and 7658 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 08:38:15,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:38:15,793 INFO L93 Difference]: Finished difference Result 5919 states and 8503 transitions. [2022-11-19 08:38:15,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 08:38:15,794 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 08:38:15,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:38:15,815 INFO L225 Difference]: With dead ends: 5919 [2022-11-19 08:38:15,815 INFO L226 Difference]: Without dead ends: 5462 [2022-11-19 08:38:15,849 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 08:38:15,850 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 221 mSDsluCounter, 836 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 1095 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:38:15,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 1095 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:38:15,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5462 states. [2022-11-19 08:38:16,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5462 to 5428. [2022-11-19 08:38:16,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5428 states, 4346 states have (on average 1.4429360331339163) internal successors, (6271), 4379 states have internal predecessors, (6271), 704 states have call successors, (704), 371 states have call predecessors, (704), 376 states have return successors, (971), 679 states have call predecessors, (971), 703 states have call successors, (971) [2022-11-19 08:38:16,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5428 states to 5428 states and 7946 transitions. [2022-11-19 08:38:16,291 INFO L78 Accepts]: Start accepts. Automaton has 5428 states and 7946 transitions. Word has length 113 [2022-11-19 08:38:16,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:38:16,291 INFO L495 AbstractCegarLoop]: Abstraction has 5428 states and 7946 transitions. [2022-11-19 08:38:16,291 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 08:38:16,291 INFO L276 IsEmpty]: Start isEmpty. Operand 5428 states and 7946 transitions. [2022-11-19 08:38:16,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-19 08:38:16,301 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:38:16,301 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 08:38:16,309 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc03a73-2ade-4b4a-97fe-df129a3aa82a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-19 08:38:16,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc03a73-2ade-4b4a-97fe-df129a3aa82a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:38:16,507 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:38:16,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:38:16,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1978119097, now seen corresponding path program 1 times [2022-11-19 08:38:16,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:38:16,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958491143] [2022-11-19 08:38:16,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:38:16,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:38:16,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:38:17,350 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 08:38:17,351 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:38:17,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958491143] [2022-11-19 08:38:17,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958491143] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:38:17,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616701389] [2022-11-19 08:38:17,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:38:17,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:38:17,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc03a73-2ade-4b4a-97fe-df129a3aa82a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:38:17,354 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc03a73-2ade-4b4a-97fe-df129a3aa82a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:38:17,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc03a73-2ade-4b4a-97fe-df129a3aa82a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-19 08:38:17,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:38:17,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-19 08:38:17,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:38:18,443 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 08:38:18,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:38:20,415 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 08:38:20,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616701389] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:38:20,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1701632826] [2022-11-19 08:38:20,418 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2022-11-19 08:38:20,418 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:38:20,418 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:38:20,419 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:38:20,419 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:39:00,606 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 252 for LOIs [2022-11-19 08:39:01,015 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 203 for LOIs [2022-11-19 08:39:01,068 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 98 for LOIs [2022-11-19 08:39:01,080 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 264 for LOIs [2022-11-19 08:39:02,940 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 152 for LOIs [2022-11-19 08:39:03,197 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 98 for LOIs [2022-11-19 08:39:03,377 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 256 for LOIs [2022-11-19 08:39:03,851 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 279 for LOIs [2022-11-19 08:39:04,305 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:40:01,407 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '181437#(and (= ~q_req_up~0 1) (= ~T6_E~0 2) (= ~t6_i~0 0) (= 0 ~t5_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) (<= ~E_2~0 2) (<= 0 ~p_num_write~0) (<= ~token~0 0) (= ~T2_E~0 2) (<= ~c_dr_pc~0 1) (= 1 ~c_dr_i~0) (<= ~p_dw_st~0 2) (<= ~t6_pc~0 0) (= 0 ~t5_st~0) (= ~E_3~0 2) (= 0 ~t6_st~0) (<= ~t1_pc~0 0) (<= 2 ~M_E~0) (<= |#NULL.offset| 0) (= ~t4_i~0 0) (<= ~t5_i~0 0) (<= 2 ~E_2~0) (<= 1 ~c_dr_st~0) (<= 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) (<= 0 ~t5_i~0) (<= ~E_6~0 2) (<= 0 ~token~0) (<= 0 ~t2_i~0) (<= ~t3_st~0 0) (= ~T3_E~0 2) (= ~local~0 0) (= ~t3_i~0 0) (<= 0 ~t6_pc~0) (<= 0 ~t3_st~0) (<= ~m_pc~0 0) (<= 2 ~E_4~0) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (<= ~M_E~0 2) (<= ~E_5~0 2) (<= ~m_st~0 0) (<= ~t3_pc~0 0) (= ~c_last_read~0 ~p_last_write~0) (<= 0 ~m_pc~0) (<= ~c_dr_st~0 1) (= ~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) (<= 0 |#NULL.offset|) (<= ~t4_pc~0 0) (= ~E_1~0 2) (<= 0 ~t4_pc~0) (<= ~t1_st~0 0) (<= 0 |#StackHeapBarrier|) (<= 0 ~t1_st~0) (<= 0 ~t1_pc~0) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-11-19 08:40:01,407 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:40:01,408 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:40:01,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17, 16] total 51 [2022-11-19 08:40:01,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399212138] [2022-11-19 08:40:01,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:40:01,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-19 08:40:01,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:40:01,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-19 08:40:01,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=770, Invalid=10572, Unknown=0, NotChecked=0, Total=11342 [2022-11-19 08:40:01,412 INFO L87 Difference]: Start difference. First operand 5428 states and 7946 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 08:40:25,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:40:25,826 INFO L93 Difference]: Finished difference Result 7941 states and 10864 transitions. [2022-11-19 08:40:25,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 229 states. [2022-11-19 08:40:25,827 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 08:40:25,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:40:25,850 INFO L225 Difference]: With dead ends: 7941 [2022-11-19 08:40:25,851 INFO L226 Difference]: Without dead ends: 7223 [2022-11-19 08:40:25,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 622 GetRequests, 291 SyntacticMatches, 2 SemanticMatches, 329 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43795 ImplicationChecksByTransitivity, 75.9s TimeCoverageRelationStatistics Valid=10057, Invalid=99173, Unknown=0, NotChecked=0, Total=109230 [2022-11-19 08:40:25,872 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 6318 mSDsluCounter, 2581 mSDsCounter, 0 mSdLazyCounter, 6955 mSolverCounterSat, 3387 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6318 SdHoareTripleChecker+Valid, 2787 SdHoareTripleChecker+Invalid, 10342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3387 IncrementalHoareTripleChecker+Valid, 6955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:40:25,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6318 Valid, 2787 Invalid, 10342 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3387 Valid, 6955 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2022-11-19 08:40:25,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7223 states. [2022-11-19 08:40:26,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7223 to 5703. [2022-11-19 08:40:26,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5703 states, 4529 states have (on average 1.4307794215058511) internal successors, (6480), 4564 states have internal predecessors, (6480), 749 states have call successors, (749), 408 states have call predecessors, (749), 423 states have return successors, (1028), 732 states have call predecessors, (1028), 748 states have call successors, (1028) [2022-11-19 08:40:26,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5703 states to 5703 states and 8257 transitions. [2022-11-19 08:40:26,676 INFO L78 Accepts]: Start accepts. Automaton has 5703 states and 8257 transitions. Word has length 114 [2022-11-19 08:40:26,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:40:26,677 INFO L495 AbstractCegarLoop]: Abstraction has 5703 states and 8257 transitions. [2022-11-19 08:40:26,677 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 08:40:26,677 INFO L276 IsEmpty]: Start isEmpty. Operand 5703 states and 8257 transitions. [2022-11-19 08:40:26,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-19 08:40:26,687 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:40:26,687 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 08:40:26,701 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc03a73-2ade-4b4a-97fe-df129a3aa82a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-19 08:40:26,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc03a73-2ade-4b4a-97fe-df129a3aa82a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-19 08:40:26,893 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:40:26,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:40:26,893 INFO L85 PathProgramCache]: Analyzing trace with hash -332875360, now seen corresponding path program 1 times [2022-11-19 08:40:26,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:40:26,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61677708] [2022-11-19 08:40:26,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:40:26,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:40:26,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:40:27,251 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 08:40:27,252 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:40:27,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61677708] [2022-11-19 08:40:27,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61677708] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:40:27,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622659896] [2022-11-19 08:40:27,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:40:27,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:40:27,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc03a73-2ade-4b4a-97fe-df129a3aa82a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:40:27,254 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc03a73-2ade-4b4a-97fe-df129a3aa82a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:40:27,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc03a73-2ade-4b4a-97fe-df129a3aa82a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-19 08:40:27,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:40:27,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 08:40:27,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:40:27,495 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 08:40:27,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:40:27,702 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 08:40:27,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622659896] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-19 08:40:27,703 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:40:27,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [14, 8] total 20 [2022-11-19 08:40:27,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532734745] [2022-11-19 08:40:27,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:40:27,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 08:40:27,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:40:27,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 08:40:27,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-11-19 08:40:27,704 INFO L87 Difference]: Start difference. First operand 5703 states and 8257 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 08:40:29,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:40:29,129 INFO L93 Difference]: Finished difference Result 7027 states and 9805 transitions. [2022-11-19 08:40:29,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-19 08:40:29,132 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 08:40:29,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:40:29,152 INFO L225 Difference]: With dead ends: 7027 [2022-11-19 08:40:29,152 INFO L226 Difference]: Without dead ends: 6036 [2022-11-19 08:40:29,157 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 08:40:29,157 INFO L413 NwaCegarLoop]: 212 mSDtfsCounter, 353 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 817 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 713 SdHoareTripleChecker+Invalid, 907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:40:29,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [357 Valid, 713 Invalid, 907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 817 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 08:40:29,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6036 states. [2022-11-19 08:40:30,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6036 to 5783. [2022-11-19 08:40:30,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5783 states, 4574 states have (on average 1.4278530826410145) internal successors, (6531), 4612 states have internal predecessors, (6531), 768 states have call successors, (768), 417 states have call predecessors, (768), 439 states have return successors, (1068), 755 states have call predecessors, (1068), 767 states have call successors, (1068) [2022-11-19 08:40:30,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5783 states to 5783 states and 8367 transitions. [2022-11-19 08:40:30,107 INFO L78 Accepts]: Start accepts. Automaton has 5783 states and 8367 transitions. Word has length 115 [2022-11-19 08:40:30,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:40:30,107 INFO L495 AbstractCegarLoop]: Abstraction has 5783 states and 8367 transitions. [2022-11-19 08:40:30,107 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 08:40:30,108 INFO L276 IsEmpty]: Start isEmpty. Operand 5783 states and 8367 transitions. [2022-11-19 08:40:30,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-19 08:40:30,118 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:40:30,118 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 08:40:30,127 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc03a73-2ade-4b4a-97fe-df129a3aa82a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-19 08:40:30,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc03a73-2ade-4b4a-97fe-df129a3aa82a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-19 08:40:30,324 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:40:30,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:40:30,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1683973456, now seen corresponding path program 1 times [2022-11-19 08:40:30,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:40:30,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826622972] [2022-11-19 08:40:30,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:40:30,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:40:30,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:40:31,354 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 08:40:31,354 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:40:31,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826622972] [2022-11-19 08:40:31,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826622972] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:40:31,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405148711] [2022-11-19 08:40:31,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:40:31,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:40:31,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc03a73-2ade-4b4a-97fe-df129a3aa82a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:40:31,356 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc03a73-2ade-4b4a-97fe-df129a3aa82a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:40:31,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc03a73-2ade-4b4a-97fe-df129a3aa82a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-19 08:40:31,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:40:31,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-19 08:40:31,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:40:32,508 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 08:40:32,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:40:34,355 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 08:40:34,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405148711] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:40:34,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [61657797] [2022-11-19 08:40:34,359 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2022-11-19 08:40:34,359 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:40:34,359 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:40:34,360 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:40:34,360 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:40:45,979 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 252 for LOIs [2022-11-19 08:40:46,592 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 201 for LOIs [2022-11-19 08:40:46,640 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 100 for LOIs [2022-11-19 08:40:46,656 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 264 for LOIs [2022-11-19 08:40:48,409 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 152 for LOIs [2022-11-19 08:40:48,624 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 100 for LOIs [2022-11-19 08:40:48,833 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 256 for LOIs [2022-11-19 08:40:49,390 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 279 for LOIs [2022-11-19 08:40:49,789 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:41:37,401 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '221490#(and (= ~q_req_up~0 1) (= ~T6_E~0 2) (= ~t6_i~0 0) (= ~t5_i~0 0) (= 0 ~t5_pc~0) (= ~t1_pc~0 0) (= ~T4_E~0 2) (<= 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) (= 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) (= ~t2_i~0 0) (= ~E_6~0 2) (= ~t4_i~0 0) (= ~c_dr_pc~0 1) (= ~m_i~0 0) (not (= ~c_num_read~0 ~p_num_write~0)) (<= ~E_4~0 2) (= ~E_2~0 2) (= ~c_last_read~0 ~q_buf_0~0) (<= ~t3_st~0 0) (= ~T3_E~0 2) (= ~local~0 0) (= ~t3_i~0 0) (<= ~c_num_read~0 1) (= ~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) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-11-19 08:41:37,401 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:41:37,401 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:41:37,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 18, 18] total 55 [2022-11-19 08:41:37,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163700102] [2022-11-19 08:41:37,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:41:37,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-11-19 08:41:37,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:41:37,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-11-19 08:41:37,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=950, Invalid=11482, Unknown=0, NotChecked=0, Total=12432 [2022-11-19 08:41:37,405 INFO L87 Difference]: Start difference. First operand 5783 states and 8367 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 08:41:55,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:41:55,587 INFO L93 Difference]: Finished difference Result 8067 states and 11069 transitions. [2022-11-19 08:41:55,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2022-11-19 08:41:55,588 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 08:41:55,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:41:55,610 INFO L225 Difference]: With dead ends: 8067 [2022-11-19 08:41:55,610 INFO L226 Difference]: Without dead ends: 6996 [2022-11-19 08:41:55,621 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 584 GetRequests, 320 SyntacticMatches, 3 SemanticMatches, 261 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26797 ImplicationChecksByTransitivity, 59.1s TimeCoverageRelationStatistics Valid=6748, Invalid=62158, Unknown=0, NotChecked=0, Total=68906 [2022-11-19 08:41:55,622 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 6299 mSDsluCounter, 2625 mSDsCounter, 0 mSdLazyCounter, 7642 mSolverCounterSat, 4163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6299 SdHoareTripleChecker+Valid, 2824 SdHoareTripleChecker+Invalid, 11805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 4163 IncrementalHoareTripleChecker+Valid, 7642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:41:55,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6299 Valid, 2824 Invalid, 11805 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [4163 Valid, 7642 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2022-11-19 08:41:55,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6996 states. [2022-11-19 08:41:56,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6996 to 5599. [2022-11-19 08:41:56,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5599 states, 4462 states have (on average 1.4350067234424024) internal successors, (6403), 4499 states have internal predecessors, (6403), 728 states have call successors, (728), 385 states have call predecessors, (728), 407 states have return successors, (1018), 716 states have call predecessors, (1018), 727 states have call successors, (1018) [2022-11-19 08:41:56,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5599 states to 5599 states and 8149 transitions. [2022-11-19 08:41:56,566 INFO L78 Accepts]: Start accepts. Automaton has 5599 states and 8149 transitions. Word has length 124 [2022-11-19 08:41:56,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:41:56,567 INFO L495 AbstractCegarLoop]: Abstraction has 5599 states and 8149 transitions. [2022-11-19 08:41:56,567 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 08:41:56,567 INFO L276 IsEmpty]: Start isEmpty. Operand 5599 states and 8149 transitions. [2022-11-19 08:41:56,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-19 08:41:56,574 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:41:56,575 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 08:41:56,580 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc03a73-2ade-4b4a-97fe-df129a3aa82a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-19 08:41:56,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc03a73-2ade-4b4a-97fe-df129a3aa82a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:41:56,780 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:41:56,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:41:56,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1771051229, now seen corresponding path program 1 times [2022-11-19 08:41:56,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:41:56,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237462425] [2022-11-19 08:41:56,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:41:56,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:41:56,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:41:56,990 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 08:41:56,990 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:41:56,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237462425] [2022-11-19 08:41:56,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237462425] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:41:56,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666184243] [2022-11-19 08:41:56,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:41:56,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:41:56,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc03a73-2ade-4b4a-97fe-df129a3aa82a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:41:56,993 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc03a73-2ade-4b4a-97fe-df129a3aa82a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:41:57,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc03a73-2ade-4b4a-97fe-df129a3aa82a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-19 08:41:57,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:41:57,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-19 08:41:57,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:41:57,264 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 08:41:57,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:41:57,505 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 08:41:57,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666184243] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-19 08:41:57,505 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:41:57,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 10] total 17 [2022-11-19 08:41:57,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8974319] [2022-11-19 08:41:57,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:41:57,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 08:41:57,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:41:57,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 08:41:57,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-11-19 08:41:57,507 INFO L87 Difference]: Start difference. First operand 5599 states and 8149 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 08:41:59,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:41:59,047 INFO L93 Difference]: Finished difference Result 6254 states and 8890 transitions. [2022-11-19 08:41:59,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-19 08:41:59,048 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 08:41:59,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:41:59,063 INFO L225 Difference]: With dead ends: 6254 [2022-11-19 08:41:59,063 INFO L226 Difference]: Without dead ends: 5367 [2022-11-19 08:41:59,067 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 08:41:59,068 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 506 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 879 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 508 SdHoareTripleChecker+Valid, 670 SdHoareTripleChecker+Invalid, 1022 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 879 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 08:41:59,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [508 Valid, 670 Invalid, 1022 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 879 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 08:41:59,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5367 states. [2022-11-19 08:41:59,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5367 to 5330. [2022-11-19 08:41:59,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5330 states, 4263 states have (on average 1.4445226366408632) internal successors, (6158), 4300 states have internal predecessors, (6158), 692 states have call successors, (692), 355 states have call predecessors, (692), 373 states have return successors, (977), 676 states have call predecessors, (977), 691 states have call successors, (977) [2022-11-19 08:41:59,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5330 states to 5330 states and 7827 transitions. [2022-11-19 08:41:59,866 INFO L78 Accepts]: Start accepts. Automaton has 5330 states and 7827 transitions. Word has length 125 [2022-11-19 08:41:59,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:41:59,866 INFO L495 AbstractCegarLoop]: Abstraction has 5330 states and 7827 transitions. [2022-11-19 08:41:59,866 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 08:41:59,866 INFO L276 IsEmpty]: Start isEmpty. Operand 5330 states and 7827 transitions. [2022-11-19 08:41:59,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-11-19 08:41:59,875 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:41:59,876 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:41:59,884 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc03a73-2ade-4b4a-97fe-df129a3aa82a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-19 08:42:00,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc03a73-2ade-4b4a-97fe-df129a3aa82a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:42:00,077 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:42:00,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:42:00,077 INFO L85 PathProgramCache]: Analyzing trace with hash 547167985, now seen corresponding path program 1 times [2022-11-19 08:42:00,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:42:00,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200470442] [2022-11-19 08:42:00,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:42:00,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:42:00,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:42:00,158 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-11-19 08:42:00,158 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:42:00,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200470442] [2022-11-19 08:42:00,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200470442] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:42:00,160 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:42:00,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:42:00,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204012942] [2022-11-19 08:42:00,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:42:00,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:42:00,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:42:00,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:42:00,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:42:00,162 INFO L87 Difference]: Start difference. First operand 5330 states and 7827 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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 08:42:01,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:42:01,452 INFO L93 Difference]: Finished difference Result 14343 states and 22004 transitions. [2022-11-19 08:42:01,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:42:01,452 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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 126 [2022-11-19 08:42:01,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:42:01,478 INFO L225 Difference]: With dead ends: 14343 [2022-11-19 08:42:01,479 INFO L226 Difference]: Without dead ends: 9748 [2022-11-19 08:42:01,495 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 08:42:01,496 INFO L413 NwaCegarLoop]: 235 mSDtfsCounter, 230 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:42:01,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 371 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:42:01,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9748 states. [2022-11-19 08:42:02,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9748 to 9690. [2022-11-19 08:42:02,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9690 states, 7835 states have (on average 1.4527121888959795) internal successors, (11382), 7896 states have internal predecessors, (11382), 1224 states have call successors, (1224), 611 states have call predecessors, (1224), 629 states have return successors, (1733), 1184 states have call predecessors, (1733), 1223 states have call successors, (1733) [2022-11-19 08:42:02,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9690 states to 9690 states and 14339 transitions. [2022-11-19 08:42:02,737 INFO L78 Accepts]: Start accepts. Automaton has 9690 states and 14339 transitions. Word has length 126 [2022-11-19 08:42:02,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:42:02,737 INFO L495 AbstractCegarLoop]: Abstraction has 9690 states and 14339 transitions. [2022-11-19 08:42:02,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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 08:42:02,738 INFO L276 IsEmpty]: Start isEmpty. Operand 9690 states and 14339 transitions. [2022-11-19 08:42:02,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-11-19 08:42:02,757 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:42:02,757 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:42:02,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-11-19 08:42:02,757 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:42:02,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:42:02,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1401946179, now seen corresponding path program 1 times [2022-11-19 08:42:02,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:42:02,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324990916] [2022-11-19 08:42:02,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:42:02,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:42:02,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:42:02,823 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-11-19 08:42:02,823 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:42:02,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324990916] [2022-11-19 08:42:02,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324990916] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:42:02,824 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:42:02,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:42:02,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694636101] [2022-11-19 08:42:02,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:42:02,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:42:02,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:42:02,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:42:02,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:42:02,826 INFO L87 Difference]: Start difference. First operand 9690 states and 14339 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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 08:42:05,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:42:05,015 INFO L93 Difference]: Finished difference Result 27247 states and 41624 transitions. [2022-11-19 08:42:05,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:42:05,015 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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 126 [2022-11-19 08:42:05,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:42:05,059 INFO L225 Difference]: With dead ends: 27247 [2022-11-19 08:42:05,059 INFO L226 Difference]: Without dead ends: 18292 [2022-11-19 08:42:05,089 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 08:42:05,090 INFO L413 NwaCegarLoop]: 243 mSDtfsCounter, 233 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:42:05,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 379 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:42:05,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18292 states. [2022-11-19 08:42:07,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18292 to 18178. [2022-11-19 08:42:07,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18178 states, 14787 states have (on average 1.4503279908027322) internal successors, (21446), 14896 states have internal predecessors, (21446), 2248 states have call successors, (2248), 1123 states have call predecessors, (2248), 1141 states have return successors, (3173), 2160 states have call predecessors, (3173), 2247 states have call successors, (3173) [2022-11-19 08:42:07,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18178 states to 18178 states and 26867 transitions. [2022-11-19 08:42:07,565 INFO L78 Accepts]: Start accepts. Automaton has 18178 states and 26867 transitions. Word has length 126 [2022-11-19 08:42:07,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:42:07,565 INFO L495 AbstractCegarLoop]: Abstraction has 18178 states and 26867 transitions. [2022-11-19 08:42:07,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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 08:42:07,566 INFO L276 IsEmpty]: Start isEmpty. Operand 18178 states and 26867 transitions. [2022-11-19 08:42:07,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-11-19 08:42:07,595 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:42:07,595 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, 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] [2022-11-19 08:42:07,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-11-19 08:42:07,596 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:42:07,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:42:07,596 INFO L85 PathProgramCache]: Analyzing trace with hash -708644648, now seen corresponding path program 1 times [2022-11-19 08:42:07,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:42:07,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082587633] [2022-11-19 08:42:07,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:42:07,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:42:07,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:42:07,663 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-11-19 08:42:07,663 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:42:07,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082587633] [2022-11-19 08:42:07,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082587633] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:42:07,664 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:42:07,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:42:07,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489104534] [2022-11-19 08:42:07,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:42:07,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:42:07,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:42:07,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:42:07,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:42:07,667 INFO L87 Difference]: Start difference. First operand 18178 states and 26867 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-19 08:42:11,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:42:11,533 INFO L93 Difference]: Finished difference Result 46406 states and 70357 transitions. [2022-11-19 08:42:11,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:42:11,534 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 145 [2022-11-19 08:42:11,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:42:11,617 INFO L225 Difference]: With dead ends: 46406 [2022-11-19 08:42:11,617 INFO L226 Difference]: Without dead ends: 28964 [2022-11-19 08:42:11,661 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 08:42:11,662 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 84 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:42:11,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 482 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:42:11,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28964 states. [2022-11-19 08:42:15,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28964 to 24954. [2022-11-19 08:42:15,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24954 states, 21111 states have (on average 1.5162711382691487) internal successors, (32010), 21221 states have internal predecessors, (32010), 2474 states have call successors, (2474), 1349 states have call predecessors, (2474), 1367 states have return successors, (3399), 2385 states have call predecessors, (3399), 2473 states have call successors, (3399) [2022-11-19 08:42:15,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24954 states to 24954 states and 37883 transitions. [2022-11-19 08:42:15,535 INFO L78 Accepts]: Start accepts. Automaton has 24954 states and 37883 transitions. Word has length 145 [2022-11-19 08:42:15,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:42:15,535 INFO L495 AbstractCegarLoop]: Abstraction has 24954 states and 37883 transitions. [2022-11-19 08:42:15,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-19 08:42:15,536 INFO L276 IsEmpty]: Start isEmpty. Operand 24954 states and 37883 transitions. [2022-11-19 08:42:15,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-11-19 08:42:15,582 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:42:15,583 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, 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] [2022-11-19 08:42:15,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-11-19 08:42:15,583 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:42:15,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:42:15,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1691806664, now seen corresponding path program 2 times [2022-11-19 08:42:15,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:42:15,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123013562] [2022-11-19 08:42:15,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:42:15,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:42:15,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:42:15,703 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-11-19 08:42:15,703 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:42:15,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123013562] [2022-11-19 08:42:15,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123013562] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:42:15,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214963919] [2022-11-19 08:42:15,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:42:15,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:42:15,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc03a73-2ade-4b4a-97fe-df129a3aa82a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:42:15,705 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc03a73-2ade-4b4a-97fe-df129a3aa82a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:42:15,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc03a73-2ade-4b4a-97fe-df129a3aa82a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-19 08:42:15,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-19 08:42:15,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:42:15,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 08:42:15,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:42:15,929 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-19 08:42:15,929 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:42:15,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214963919] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:42:15,929 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:42:15,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-19 08:42:15,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558085347] [2022-11-19 08:42:15,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:42:15,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:42:15,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:42:15,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:42:15,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:42:15,931 INFO L87 Difference]: Start difference. First operand 24954 states and 37883 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 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 08:42:19,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:42:19,925 INFO L93 Difference]: Finished difference Result 43829 states and 66464 transitions. [2022-11-19 08:42:19,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:42:19,925 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 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 145 [2022-11-19 08:42:19,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:42:20,005 INFO L225 Difference]: With dead ends: 43829 [2022-11-19 08:42:20,005 INFO L226 Difference]: Without dead ends: 29635 [2022-11-19 08:42:20,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 145 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 08:42:20,046 INFO L413 NwaCegarLoop]: 241 mSDtfsCounter, 226 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:42:20,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 280 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:42:20,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29635 states. [2022-11-19 08:42:24,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29635 to 29635. [2022-11-19 08:42:24,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29635 states, 25317 states have (on average 1.47221234743453) internal successors, (37272), 25427 states have internal predecessors, (37272), 2631 states have call successors, (2631), 1666 states have call predecessors, (2631), 1685 states have return successors, (3682), 2543 states have call predecessors, (3682), 2630 states have call successors, (3682) [2022-11-19 08:42:24,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29635 states to 29635 states and 43585 transitions. [2022-11-19 08:42:24,254 INFO L78 Accepts]: Start accepts. Automaton has 29635 states and 43585 transitions. Word has length 145 [2022-11-19 08:42:24,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:42:24,254 INFO L495 AbstractCegarLoop]: Abstraction has 29635 states and 43585 transitions. [2022-11-19 08:42:24,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 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 08:42:24,255 INFO L276 IsEmpty]: Start isEmpty. Operand 29635 states and 43585 transitions. [2022-11-19 08:42:24,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-11-19 08:42:24,303 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:42:24,303 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, 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 08:42:24,312 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc03a73-2ade-4b4a-97fe-df129a3aa82a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-19 08:42:24,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc03a73-2ade-4b4a-97fe-df129a3aa82a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-19 08:42:24,508 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:42:24,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:42:24,509 INFO L85 PathProgramCache]: Analyzing trace with hash -640357575, now seen corresponding path program 1 times [2022-11-19 08:42:24,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:42:24,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429636245] [2022-11-19 08:42:24,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:42:24,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:42:24,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:42:24,651 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-11-19 08:42:24,651 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:42:24,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429636245] [2022-11-19 08:42:24,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429636245] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:42:24,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516957517] [2022-11-19 08:42:24,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:42:24,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:42:24,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc03a73-2ade-4b4a-97fe-df129a3aa82a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:42:24,653 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc03a73-2ade-4b4a-97fe-df129a3aa82a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:42:24,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfc03a73-2ade-4b4a-97fe-df129a3aa82a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-19 08:42:24,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:42:24,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 826 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 08:42:24,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:42:24,889 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-19 08:42:24,890 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:42:24,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516957517] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:42:24,890 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:42:24,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-19 08:42:24,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205560788] [2022-11-19 08:42:24,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:42:24,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:42:24,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:42:24,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:42:24,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:42:24,892 INFO L87 Difference]: Start difference. First operand 29635 states and 43585 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-19 08:42:30,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:42:30,010 INFO L93 Difference]: Finished difference Result 56244 states and 83867 transitions. [2022-11-19 08:42:30,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:42:30,011 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 145 [2022-11-19 08:42:30,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:42:30,124 INFO L225 Difference]: With dead ends: 56244 [2022-11-19 08:42:30,125 INFO L226 Difference]: Without dead ends: 41522 [2022-11-19 08:42:30,152 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:42:30,153 INFO L413 NwaCegarLoop]: 326 mSDtfsCounter, 111 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:42:30,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 553 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:42:30,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41522 states.