./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label46+token_ring.03.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_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/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_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label46+token_ring.03.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/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_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/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 81b1f0d7bc9c0822a8207cacf976d5f28113ec35347c6e8d0beebb39e2d17414 --- 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 08:06:05,599 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 08:06:05,601 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 08:06:05,620 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 08:06:05,620 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 08:06:05,621 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 08:06:05,622 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 08:06:05,624 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 08:06:05,626 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 08:06:05,627 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 08:06:05,628 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 08:06:05,629 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 08:06:05,629 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 08:06:05,630 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 08:06:05,631 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 08:06:05,632 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 08:06:05,633 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 08:06:05,634 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 08:06:05,635 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 08:06:05,637 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 08:06:05,638 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 08:06:05,640 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 08:06:05,641 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 08:06:05,642 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 08:06:05,645 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 08:06:05,646 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 08:06:05,646 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 08:06:05,647 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 08:06:05,647 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 08:06:05,648 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 08:06:05,649 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 08:06:05,649 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 08:06:05,650 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 08:06:05,651 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 08:06:05,652 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 08:06:05,652 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 08:06:05,653 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 08:06:05,653 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 08:06:05,654 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 08:06:05,655 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 08:06:05,655 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 08:06:05,660 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 08:06:05,696 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 08:06:05,696 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 08:06:05,697 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 08:06:05,697 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 08:06:05,698 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 08:06:05,698 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 08:06:05,698 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 08:06:05,699 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 08:06:05,699 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 08:06:05,699 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 08:06:05,700 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 08:06:05,700 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 08:06:05,700 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 08:06:05,701 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 08:06:05,701 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 08:06:05,701 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 08:06:05,701 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 08:06:05,701 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 08:06:05,702 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 08:06:05,702 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 08:06:05,702 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 08:06:05,702 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 08:06:05,703 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 08:06:05,704 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 08:06:05,704 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 08:06:05,704 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 08:06:05,705 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 08:06:05,705 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 08:06:05,705 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 08:06:05,705 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 08:06:05,705 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 08:06:05,706 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 08:06:05,706 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:06:05,706 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 08:06:05,706 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 08:06:05,706 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 08:06:05,707 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 08:06:05,707 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 08:06:05,707 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 08:06:05,707 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 08:06:05,707 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 08:06:05,707 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_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 81b1f0d7bc9c0822a8207cacf976d5f28113ec35347c6e8d0beebb39e2d17414 [2022-11-19 08:06:06,081 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 08:06:06,118 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 08:06:06,121 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 08:06:06,123 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 08:06:06,123 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 08:06:06,125 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/combinations/Problem05_label46+token_ring.03.cil-2.c [2022-11-19 08:06:06,223 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/data/4922ebbd4/35d1e4ec03a04cd58bfcb6eabf265ad9/FLAG9ad51b9bf [2022-11-19 08:06:07,366 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 08:06:07,367 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/sv-benchmarks/c/combinations/Problem05_label46+token_ring.03.cil-2.c [2022-11-19 08:06:07,431 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/data/4922ebbd4/35d1e4ec03a04cd58bfcb6eabf265ad9/FLAG9ad51b9bf [2022-11-19 08:06:07,609 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/data/4922ebbd4/35d1e4ec03a04cd58bfcb6eabf265ad9 [2022-11-19 08:06:07,613 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 08:06:07,617 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 08:06:07,619 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 08:06:07,619 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 08:06:07,623 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 08:06:07,624 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:06:07" (1/1) ... [2022-11-19 08:06:07,625 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@628428c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:06:07, skipping insertion in model container [2022-11-19 08:06:07,626 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:06:07" (1/1) ... [2022-11-19 08:06:07,636 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 08:06:07,897 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 08:06:10,457 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_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/sv-benchmarks/c/combinations/Problem05_label46+token_ring.03.cil-2.c[382357,382370] [2022-11-19 08:06:10,484 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_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/sv-benchmarks/c/combinations/Problem05_label46+token_ring.03.cil-2.c[383339,383352] [2022-11-19 08:06:10,677 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:06:10,688 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 08:06:11,966 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_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/sv-benchmarks/c/combinations/Problem05_label46+token_ring.03.cil-2.c[382357,382370] [2022-11-19 08:06:11,970 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_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/sv-benchmarks/c/combinations/Problem05_label46+token_ring.03.cil-2.c[383339,383352] [2022-11-19 08:06:11,993 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:06:12,097 INFO L208 MainTranslator]: Completed translation [2022-11-19 08:06:12,097 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:06:12 WrapperNode [2022-11-19 08:06:12,098 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 08:06:12,099 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 08:06:12,099 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 08:06:12,100 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 08:06:12,107 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:06:12" (1/1) ... [2022-11-19 08:06:12,210 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:06:12" (1/1) ... [2022-11-19 08:06:12,612 INFO L138 Inliner]: procedures = 50, calls = 50, calls flagged for inlining = 28, calls inlined = 28, statements flattened = 12677 [2022-11-19 08:06:12,612 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 08:06:12,613 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 08:06:12,613 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 08:06:12,613 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 08:06:12,634 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:06:12" (1/1) ... [2022-11-19 08:06:12,634 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:06:12" (1/1) ... [2022-11-19 08:06:12,771 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:06:12" (1/1) ... [2022-11-19 08:06:12,771 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:06:12" (1/1) ... [2022-11-19 08:06:12,921 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:06:12" (1/1) ... [2022-11-19 08:06:12,989 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:06:12" (1/1) ... [2022-11-19 08:06:13,013 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:06:12" (1/1) ... [2022-11-19 08:06:13,041 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:06:12" (1/1) ... [2022-11-19 08:06:13,096 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 08:06:13,098 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 08:06:13,098 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 08:06:13,098 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 08:06:13,100 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:06:12" (1/1) ... [2022-11-19 08:06:13,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:06:13,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:06:13,132 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 08:06:13,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 08:06:13,181 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 08:06:13,181 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-11-19 08:06:13,181 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-11-19 08:06:13,182 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-19 08:06:13,182 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-19 08:06:13,182 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-11-19 08:06:13,182 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-11-19 08:06:13,182 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-11-19 08:06:13,183 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-11-19 08:06:13,183 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-11-19 08:06:13,183 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-11-19 08:06:13,183 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-11-19 08:06:13,183 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-11-19 08:06:13,183 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 08:06:13,184 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 08:06:13,184 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 08:06:13,305 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 08:06:13,308 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 08:06:23,153 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 08:06:25,628 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 08:06:25,628 INFO L300 CfgBuilder]: Removed 7 assume(true) statements. [2022-11-19 08:06:25,636 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:06:25 BoogieIcfgContainer [2022-11-19 08:06:25,636 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 08:06:25,639 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 08:06:25,640 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 08:06:25,644 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 08:06:25,644 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:06:07" (1/3) ... [2022-11-19 08:06:25,645 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d4fc83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:06:25, skipping insertion in model container [2022-11-19 08:06:25,645 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:06:12" (2/3) ... [2022-11-19 08:06:25,646 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d4fc83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:06:25, skipping insertion in model container [2022-11-19 08:06:25,646 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:06:25" (3/3) ... [2022-11-19 08:06:25,648 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label46+token_ring.03.cil-2.c [2022-11-19 08:06:25,669 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 08:06:25,669 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-19 08:06:25,768 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 08:06:25,776 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;@51ed350e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 08:06:25,776 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-19 08:06:25,793 INFO L276 IsEmpty]: Start isEmpty. Operand has 1732 states, 1706 states have (on average 1.9747948417350527) internal successors, (3369), 1709 states have internal predecessors, (3369), 17 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-11-19 08:06:25,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-19 08:06:25,812 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:06:25,813 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] [2022-11-19 08:06:25,814 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:06:25,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:06:25,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1179688606, now seen corresponding path program 1 times [2022-11-19 08:06:25,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:06:25,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920633863] [2022-11-19 08:06:25,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:06:25,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:06:25,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:06:26,243 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 08:06:26,243 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:06:26,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920633863] [2022-11-19 08:06:26,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920633863] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:06:26,245 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:06:26,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:06:26,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24690148] [2022-11-19 08:06:26,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:06:26,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:06:26,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:06:26,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:06:26,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:06:26,303 INFO L87 Difference]: Start difference. First operand has 1732 states, 1706 states have (on average 1.9747948417350527) internal successors, (3369), 1709 states have internal predecessors, (3369), 17 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 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 08:06:27,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:06:27,507 INFO L93 Difference]: Finished difference Result 3536 states and 6923 transitions. [2022-11-19 08:06:27,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:06:27,510 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 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 40 [2022-11-19 08:06:27,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:06:27,538 INFO L225 Difference]: With dead ends: 3536 [2022-11-19 08:06:27,538 INFO L226 Difference]: Without dead ends: 1803 [2022-11-19 08:06:27,549 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 08:06:27,553 INFO L413 NwaCegarLoop]: 3241 mSDtfsCounter, 3482 mSDsluCounter, 3179 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3482 SdHoareTripleChecker+Valid, 6420 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-19 08:06:27,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3482 Valid, 6420 Invalid, 596 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-19 08:06:27,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1803 states. [2022-11-19 08:06:27,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1803 to 1802. [2022-11-19 08:06:27,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1802 states, 1758 states have (on average 1.9522184300341296) internal successors, (3432), 1761 states have internal predecessors, (3432), 30 states have call successors, (30), 12 states have call predecessors, (30), 12 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2022-11-19 08:06:27,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1802 states to 1802 states and 3492 transitions. [2022-11-19 08:06:27,699 INFO L78 Accepts]: Start accepts. Automaton has 1802 states and 3492 transitions. Word has length 40 [2022-11-19 08:06:27,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:06:27,700 INFO L495 AbstractCegarLoop]: Abstraction has 1802 states and 3492 transitions. [2022-11-19 08:06:27,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 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 08:06:27,701 INFO L276 IsEmpty]: Start isEmpty. Operand 1802 states and 3492 transitions. [2022-11-19 08:06:27,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-19 08:06:27,711 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:06:27,711 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, 1, 1, 1, 1, 1, 1, 1, 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 08:06:27,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 08:06:27,712 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:06:27,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:06:27,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1716364407, now seen corresponding path program 1 times [2022-11-19 08:06:27,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:06:27,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052345369] [2022-11-19 08:06:27,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:06:27,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:06:27,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:06:27,953 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 08:06:27,953 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:06:27,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052345369] [2022-11-19 08:06:27,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052345369] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:06:27,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939136342] [2022-11-19 08:06:27,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:06:27,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:06:27,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:06:27,961 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:06:27,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 08:06:28,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:06:28,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 08:06:28,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:06:28,185 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 08:06:28,185 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:06:28,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939136342] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:06:28,186 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:06:28,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-19 08:06:28,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819559674] [2022-11-19 08:06:28,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:06:28,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:06:28,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:06:28,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:06:28,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:06:28,189 INFO L87 Difference]: Start difference. First operand 1802 states and 3492 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 2 states have internal predecessors, (49), 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 08:06:28,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:06:28,707 INFO L93 Difference]: Finished difference Result 2107 states and 3925 transitions. [2022-11-19 08:06:28,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:06:28,708 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 2 states have internal predecessors, (49), 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 73 [2022-11-19 08:06:28,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:06:28,725 INFO L225 Difference]: With dead ends: 2107 [2022-11-19 08:06:28,725 INFO L226 Difference]: Without dead ends: 1951 [2022-11-19 08:06:28,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 73 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 08:06:28,729 INFO L413 NwaCegarLoop]: 3190 mSDtfsCounter, 3363 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3363 SdHoareTripleChecker+Valid, 3280 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:06:28,730 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3363 Valid, 3280 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 08:06:28,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1951 states. [2022-11-19 08:06:28,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1951 to 1947. [2022-11-19 08:06:28,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1947 states, 1867 states have (on average 1.9180503481521156) internal successors, (3581), 1871 states have internal predecessors, (3581), 54 states have call successors, (54), 24 states have call predecessors, (54), 24 states have return successors, (54), 52 states have call predecessors, (54), 54 states have call successors, (54) [2022-11-19 08:06:28,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1947 states to 1947 states and 3689 transitions. [2022-11-19 08:06:28,807 INFO L78 Accepts]: Start accepts. Automaton has 1947 states and 3689 transitions. Word has length 73 [2022-11-19 08:06:28,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:06:28,807 INFO L495 AbstractCegarLoop]: Abstraction has 1947 states and 3689 transitions. [2022-11-19 08:06:28,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 2 states have internal predecessors, (49), 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 08:06:28,808 INFO L276 IsEmpty]: Start isEmpty. Operand 1947 states and 3689 transitions. [2022-11-19 08:06:28,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-19 08:06:28,812 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:06:28,812 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, 1, 1, 1, 1, 1, 1, 1, 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 08:06:28,825 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 08:06:29,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:06:29,020 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:06:29,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:06:29,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1210161973, now seen corresponding path program 1 times [2022-11-19 08:06:29,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:06:29,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078470716] [2022-11-19 08:06:29,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:06:29,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:06:29,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:06:29,270 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 08:06:29,271 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:06:29,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078470716] [2022-11-19 08:06:29,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078470716] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:06:29,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194320709] [2022-11-19 08:06:29,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:06:29,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:06:29,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:06:29,283 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:06:29,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 08:06:29,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:06:29,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 08:06:29,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:06:29,466 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-19 08:06:29,466 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:06:29,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194320709] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:06:29,467 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:06:29,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-19 08:06:29,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471869181] [2022-11-19 08:06:29,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:06:29,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:06:29,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:06:29,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:06:29,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:06:29,469 INFO L87 Difference]: Start difference. First operand 1947 states and 3689 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 2 states have internal predecessors, (46), 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 08:06:29,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:06:29,953 INFO L93 Difference]: Finished difference Result 2536 states and 4516 transitions. [2022-11-19 08:06:29,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:06:29,954 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 2 states have internal predecessors, (46), 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 73 [2022-11-19 08:06:29,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:06:29,967 INFO L225 Difference]: With dead ends: 2536 [2022-11-19 08:06:29,967 INFO L226 Difference]: Without dead ends: 2235 [2022-11-19 08:06:29,970 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 73 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 08:06:29,975 INFO L413 NwaCegarLoop]: 3166 mSDtfsCounter, 3366 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3366 SdHoareTripleChecker+Valid, 3256 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:06:29,976 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3366 Valid, 3256 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 08:06:29,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2235 states. [2022-11-19 08:06:30,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2235 to 2229. [2022-11-19 08:06:30,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2229 states, 2079 states have (on average 1.86002886002886) internal successors, (3867), 2085 states have internal predecessors, (3867), 100 states have call successors, (100), 48 states have call predecessors, (100), 48 states have return successors, (100), 96 states have call predecessors, (100), 100 states have call successors, (100) [2022-11-19 08:06:30,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2229 states to 2229 states and 4067 transitions. [2022-11-19 08:06:30,058 INFO L78 Accepts]: Start accepts. Automaton has 2229 states and 4067 transitions. Word has length 73 [2022-11-19 08:06:30,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:06:30,058 INFO L495 AbstractCegarLoop]: Abstraction has 2229 states and 4067 transitions. [2022-11-19 08:06:30,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 2 states have internal predecessors, (46), 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 08:06:30,059 INFO L276 IsEmpty]: Start isEmpty. Operand 2229 states and 4067 transitions. [2022-11-19 08:06:30,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-19 08:06:30,061 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:06:30,061 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, 1, 1, 1, 1, 1, 1, 1, 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 08:06:30,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 08:06:30,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:06:30,268 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:06:30,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:06:30,268 INFO L85 PathProgramCache]: Analyzing trace with hash -563626935, now seen corresponding path program 1 times [2022-11-19 08:06:30,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:06:30,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106085333] [2022-11-19 08:06:30,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:06:30,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:06:30,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:06:30,729 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-19 08:06:30,729 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:06:30,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106085333] [2022-11-19 08:06:30,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106085333] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:06:30,730 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:06:30,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 08:06:30,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40674045] [2022-11-19 08:06:30,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:06:30,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 08:06:30,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:06:30,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 08:06:30,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:06:30,732 INFO L87 Difference]: Start difference. First operand 2229 states and 4067 transitions. Second operand has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-19 08:06:31,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:06:31,974 INFO L93 Difference]: Finished difference Result 3505 states and 5806 transitions. [2022-11-19 08:06:31,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 08:06:31,975 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 73 [2022-11-19 08:06:31,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:06:31,989 INFO L225 Difference]: With dead ends: 3505 [2022-11-19 08:06:31,990 INFO L226 Difference]: Without dead ends: 2923 [2022-11-19 08:06:31,993 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-19 08:06:31,994 INFO L413 NwaCegarLoop]: 3173 mSDtfsCounter, 3590 mSDsluCounter, 9386 mSDsCounter, 0 mSdLazyCounter, 1059 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3602 SdHoareTripleChecker+Valid, 12559 SdHoareTripleChecker+Invalid, 1146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1059 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:06:31,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3602 Valid, 12559 Invalid, 1146 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [87 Valid, 1059 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-19 08:06:31,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2923 states. [2022-11-19 08:06:32,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2923 to 2761. [2022-11-19 08:06:32,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2761 states, 2475 states have (on average 1.7741414141414142) internal successors, (4391), 2485 states have internal predecessors, (4391), 188 states have call successors, (188), 96 states have call predecessors, (188), 96 states have return successors, (188), 180 states have call predecessors, (188), 188 states have call successors, (188) [2022-11-19 08:06:32,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2761 states to 2761 states and 4767 transitions. [2022-11-19 08:06:32,122 INFO L78 Accepts]: Start accepts. Automaton has 2761 states and 4767 transitions. Word has length 73 [2022-11-19 08:06:32,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:06:32,122 INFO L495 AbstractCegarLoop]: Abstraction has 2761 states and 4767 transitions. [2022-11-19 08:06:32,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-19 08:06:32,123 INFO L276 IsEmpty]: Start isEmpty. Operand 2761 states and 4767 transitions. [2022-11-19 08:06:32,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-19 08:06:32,126 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:06:32,126 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, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:06:32,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 08:06:32,127 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:06:32,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:06:32,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1427092012, now seen corresponding path program 1 times [2022-11-19 08:06:32,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:06:32,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789692450] [2022-11-19 08:06:32,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:06:32,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:06:32,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:06:32,197 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-19 08:06:32,197 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:06:32,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789692450] [2022-11-19 08:06:32,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789692450] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:06:32,198 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:06:32,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:06:32,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058762330] [2022-11-19 08:06:32,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:06:32,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:06:32,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:06:32,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:06:32,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:06:32,200 INFO L87 Difference]: Start difference. First operand 2761 states and 4767 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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 08:06:32,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:06:32,993 INFO L93 Difference]: Finished difference Result 3622 states and 5946 transitions. [2022-11-19 08:06:32,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:06:32,994 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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 74 [2022-11-19 08:06:32,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:06:33,008 INFO L225 Difference]: With dead ends: 3622 [2022-11-19 08:06:33,009 INFO L226 Difference]: Without dead ends: 3044 [2022-11-19 08:06:33,013 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 08:06:33,016 INFO L413 NwaCegarLoop]: 3204 mSDtfsCounter, 45 mSDsluCounter, 3158 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 6362 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:06:33,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 6362 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 08:06:33,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3044 states. [2022-11-19 08:06:33,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3044 to 2913. [2022-11-19 08:06:33,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2913 states, 2611 states have (on average 1.7644580620451935) internal successors, (4607), 2621 states have internal predecessors, (4607), 196 states have call successors, (196), 104 states have call predecessors, (196), 104 states have return successors, (196), 188 states have call predecessors, (196), 196 states have call successors, (196) [2022-11-19 08:06:33,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2913 states to 2913 states and 4999 transitions. [2022-11-19 08:06:33,165 INFO L78 Accepts]: Start accepts. Automaton has 2913 states and 4999 transitions. Word has length 74 [2022-11-19 08:06:33,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:06:33,168 INFO L495 AbstractCegarLoop]: Abstraction has 2913 states and 4999 transitions. [2022-11-19 08:06:33,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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 08:06:33,169 INFO L276 IsEmpty]: Start isEmpty. Operand 2913 states and 4999 transitions. [2022-11-19 08:06:33,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-19 08:06:33,176 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:06:33,176 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-19 08:06:33,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-19 08:06:33,176 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:06:33,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:06:33,177 INFO L85 PathProgramCache]: Analyzing trace with hash 406069428, now seen corresponding path program 1 times [2022-11-19 08:06:33,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:06:33,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810694821] [2022-11-19 08:06:33,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:06:33,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:06:33,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:06:33,273 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:06:33,274 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:06:33,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810694821] [2022-11-19 08:06:33,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810694821] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:06:33,274 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:06:33,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:06:33,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144772598] [2022-11-19 08:06:33,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:06:33,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:06:33,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:06:33,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:06:33,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:06:33,278 INFO L87 Difference]: Start difference. First operand 2913 states and 4999 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (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 08:06:33,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:06:33,946 INFO L93 Difference]: Finished difference Result 4810 states and 7608 transitions. [2022-11-19 08:06:33,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:06:33,947 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (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 96 [2022-11-19 08:06:33,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:06:33,963 INFO L225 Difference]: With dead ends: 4810 [2022-11-19 08:06:33,963 INFO L226 Difference]: Without dead ends: 3543 [2022-11-19 08:06:33,968 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 08:06:33,969 INFO L413 NwaCegarLoop]: 3190 mSDtfsCounter, 3359 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3359 SdHoareTripleChecker+Valid, 3280 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:06:33,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3359 Valid, 3280 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 08:06:33,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3543 states. [2022-11-19 08:06:34,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3543 to 3529. [2022-11-19 08:06:34,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3529 states, 3083 states have (on average 1.6980214077197535) internal successors, (5235), 3097 states have internal predecessors, (5235), 288 states have call successors, (288), 156 states have call predecessors, (288), 156 states have return successors, (288), 276 states have call predecessors, (288), 288 states have call successors, (288) [2022-11-19 08:06:34,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3529 states to 3529 states and 5811 transitions. [2022-11-19 08:06:34,134 INFO L78 Accepts]: Start accepts. Automaton has 3529 states and 5811 transitions. Word has length 96 [2022-11-19 08:06:34,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:06:34,134 INFO L495 AbstractCegarLoop]: Abstraction has 3529 states and 5811 transitions. [2022-11-19 08:06:34,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (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 08:06:34,135 INFO L276 IsEmpty]: Start isEmpty. Operand 3529 states and 5811 transitions. [2022-11-19 08:06:34,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-19 08:06:34,145 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:06:34,145 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:06:34,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-19 08:06:34,146 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:06:34,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:06:34,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1168938897, now seen corresponding path program 1 times [2022-11-19 08:06:34,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:06:34,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439008617] [2022-11-19 08:06:34,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:06:34,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:06:34,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:06:34,277 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-19 08:06:34,277 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:06:34,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439008617] [2022-11-19 08:06:34,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439008617] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:06:34,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163681222] [2022-11-19 08:06:34,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:06:34,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:06:34,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:06:34,279 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:06:34,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 08:06:34,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:06:34,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 08:06:34,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:06:34,469 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-19 08:06:34,469 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:06:34,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163681222] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:06:34,470 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:06:34,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-19 08:06:34,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400036843] [2022-11-19 08:06:34,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:06:34,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:06:34,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:06:34,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:06:34,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:06:34,472 INFO L87 Difference]: Start difference. First operand 3529 states and 5811 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 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 08:06:35,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:06:35,128 INFO L93 Difference]: Finished difference Result 5197 states and 8113 transitions. [2022-11-19 08:06:35,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:06:35,129 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 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 109 [2022-11-19 08:06:35,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:06:35,147 INFO L225 Difference]: With dead ends: 5197 [2022-11-19 08:06:35,147 INFO L226 Difference]: Without dead ends: 3931 [2022-11-19 08:06:35,152 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 109 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 08:06:35,153 INFO L413 NwaCegarLoop]: 3204 mSDtfsCounter, 53 mSDsluCounter, 3160 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 6364 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:06:35,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 6364 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 08:06:35,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3931 states. [2022-11-19 08:06:35,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3931 to 3741. [2022-11-19 08:06:35,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3741 states, 3271 states have (on average 1.6921430755120759) internal successors, (5535), 3285 states have internal predecessors, (5535), 300 states have call successors, (300), 168 states have call predecessors, (300), 168 states have return successors, (300), 288 states have call predecessors, (300), 300 states have call successors, (300) [2022-11-19 08:06:35,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3741 states to 3741 states and 6135 transitions. [2022-11-19 08:06:35,329 INFO L78 Accepts]: Start accepts. Automaton has 3741 states and 6135 transitions. Word has length 109 [2022-11-19 08:06:35,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:06:35,329 INFO L495 AbstractCegarLoop]: Abstraction has 3741 states and 6135 transitions. [2022-11-19 08:06:35,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 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 08:06:35,330 INFO L276 IsEmpty]: Start isEmpty. Operand 3741 states and 6135 transitions. [2022-11-19 08:06:35,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-19 08:06:35,337 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:06:35,337 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:06:35,353 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 08:06:35,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:06:35,554 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:06:35,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:06:35,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1351597249, now seen corresponding path program 2 times [2022-11-19 08:06:35,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:06:35,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330835071] [2022-11-19 08:06:35,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:06:35,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:06:35,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:06:35,979 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 10 proven. 27 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-19 08:06:35,980 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:06:35,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330835071] [2022-11-19 08:06:35,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330835071] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:06:35,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366664738] [2022-11-19 08:06:35,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:06:35,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:06:35,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:06:35,982 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:06:35,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 08:06:36,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-19 08:06:36,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:06:36,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 08:06:36,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:06:36,191 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-19 08:06:36,194 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:06:36,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366664738] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:06:36,195 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:06:36,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-19 08:06:36,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243686753] [2022-11-19 08:06:36,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:06:36,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:06:36,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:06:36,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:06:36,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:06:36,198 INFO L87 Difference]: Start difference. First operand 3741 states and 6135 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-19 08:06:36,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:06:36,985 INFO L93 Difference]: Finished difference Result 5229 states and 8277 transitions. [2022-11-19 08:06:36,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:06:36,986 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 109 [2022-11-19 08:06:36,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:06:37,017 INFO L225 Difference]: With dead ends: 5229 [2022-11-19 08:06:37,017 INFO L226 Difference]: Without dead ends: 3751 [2022-11-19 08:06:37,024 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:06:37,025 INFO L413 NwaCegarLoop]: 3217 mSDtfsCounter, 102 mSDsluCounter, 3147 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 6364 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:06:37,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 6364 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 08:06:37,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3751 states. [2022-11-19 08:06:37,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3751 to 3733. [2022-11-19 08:06:37,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3733 states, 3263 states have (on average 1.681581366840331) internal successors, (5487), 3277 states have internal predecessors, (5487), 300 states have call successors, (300), 168 states have call predecessors, (300), 168 states have return successors, (300), 288 states have call predecessors, (300), 300 states have call successors, (300) [2022-11-19 08:06:37,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3733 states to 3733 states and 6087 transitions. [2022-11-19 08:06:37,305 INFO L78 Accepts]: Start accepts. Automaton has 3733 states and 6087 transitions. Word has length 109 [2022-11-19 08:06:37,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:06:37,307 INFO L495 AbstractCegarLoop]: Abstraction has 3733 states and 6087 transitions. [2022-11-19 08:06:37,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-19 08:06:37,308 INFO L276 IsEmpty]: Start isEmpty. Operand 3733 states and 6087 transitions. [2022-11-19 08:06:37,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-19 08:06:37,316 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:06:37,318 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:06:37,325 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 08:06:37,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:06:37,525 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:06:37,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:06:37,526 INFO L85 PathProgramCache]: Analyzing trace with hash -341590015, now seen corresponding path program 1 times [2022-11-19 08:06:37,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:06:37,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005767399] [2022-11-19 08:06:37,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:06:37,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:06:37,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:06:37,828 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-19 08:06:37,829 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:06:37,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005767399] [2022-11-19 08:06:37,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005767399] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:06:37,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936659342] [2022-11-19 08:06:37,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:06:37,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:06:37,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:06:37,831 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:06:37,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 08:06:37,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:06:37,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 08:06:38,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:06:38,030 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-19 08:06:38,030 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:06:38,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936659342] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:06:38,030 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:06:38,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-19 08:06:38,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990542664] [2022-11-19 08:06:38,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:06:38,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:06:38,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:06:38,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:06:38,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:06:38,033 INFO L87 Difference]: Start difference. First operand 3733 states and 6087 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-19 08:06:38,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:06:38,712 INFO L93 Difference]: Finished difference Result 5579 states and 8550 transitions. [2022-11-19 08:06:38,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:06:38,712 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 109 [2022-11-19 08:06:38,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:06:38,729 INFO L225 Difference]: With dead ends: 5579 [2022-11-19 08:06:38,730 INFO L226 Difference]: Without dead ends: 4181 [2022-11-19 08:06:38,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:06:38,737 INFO L413 NwaCegarLoop]: 3167 mSDtfsCounter, 3369 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3369 SdHoareTripleChecker+Valid, 3191 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:06:38,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3369 Valid, 3191 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 08:06:38,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4181 states. [2022-11-19 08:06:39,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4181 to 4181. [2022-11-19 08:06:39,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4181 states, 3647 states have (on average 1.6262681656155744) internal successors, (5931), 3661 states have internal predecessors, (5931), 320 states have call successors, (320), 212 states have call predecessors, (320), 212 states have return successors, (320), 308 states have call predecessors, (320), 320 states have call successors, (320) [2022-11-19 08:06:39,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4181 states to 4181 states and 6571 transitions. [2022-11-19 08:06:39,167 INFO L78 Accepts]: Start accepts. Automaton has 4181 states and 6571 transitions. Word has length 109 [2022-11-19 08:06:39,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:06:39,167 INFO L495 AbstractCegarLoop]: Abstraction has 4181 states and 6571 transitions. [2022-11-19 08:06:39,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-19 08:06:39,167 INFO L276 IsEmpty]: Start isEmpty. Operand 4181 states and 6571 transitions. [2022-11-19 08:06:39,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-19 08:06:39,174 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:06:39,174 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:06:39,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 08:06:39,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-19 08:06:39,380 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:06:39,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:06:39,381 INFO L85 PathProgramCache]: Analyzing trace with hash -912249882, now seen corresponding path program 1 times [2022-11-19 08:06:39,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:06:39,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485247870] [2022-11-19 08:06:39,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:06:39,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:06:39,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:06:39,652 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-19 08:06:39,652 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:06:39,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485247870] [2022-11-19 08:06:39,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485247870] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:06:39,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912018359] [2022-11-19 08:06:39,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:06:39,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:06:39,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:06:39,654 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:06:39,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 08:06:39,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:06:39,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 08:06:39,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:06:39,842 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-19 08:06:39,842 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:06:39,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912018359] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:06:39,843 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:06:39,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-19 08:06:39,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844070658] [2022-11-19 08:06:39,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:06:39,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:06:39,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:06:39,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:06:39,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:06:39,847 INFO L87 Difference]: Start difference. First operand 4181 states and 6571 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-19 08:06:40,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:06:40,582 INFO L93 Difference]: Finished difference Result 7683 states and 11232 transitions. [2022-11-19 08:06:40,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:06:40,583 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 110 [2022-11-19 08:06:40,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:06:40,608 INFO L225 Difference]: With dead ends: 7683 [2022-11-19 08:06:40,608 INFO L226 Difference]: Without dead ends: 5149 [2022-11-19 08:06:40,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:06:40,617 INFO L413 NwaCegarLoop]: 3176 mSDtfsCounter, 49 mSDsluCounter, 3150 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 6326 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:06:40,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 6326 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 08:06:40,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5149 states. [2022-11-19 08:06:40,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5149 to 4477. [2022-11-19 08:06:40,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4477 states, 3907 states have (on average 1.6204248784233428) internal successors, (6331), 3922 states have internal predecessors, (6331), 338 states have call successors, (338), 230 states have call predecessors, (338), 230 states have return successors, (338), 325 states have call predecessors, (338), 338 states have call successors, (338) [2022-11-19 08:06:40,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4477 states to 4477 states and 7007 transitions. [2022-11-19 08:06:40,882 INFO L78 Accepts]: Start accepts. Automaton has 4477 states and 7007 transitions. Word has length 110 [2022-11-19 08:06:40,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:06:40,882 INFO L495 AbstractCegarLoop]: Abstraction has 4477 states and 7007 transitions. [2022-11-19 08:06:40,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-19 08:06:40,883 INFO L276 IsEmpty]: Start isEmpty. Operand 4477 states and 7007 transitions. [2022-11-19 08:06:40,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-19 08:06:40,893 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:06:40,893 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:06:40,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-19 08:06:41,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:06:41,099 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:06:41,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:06:41,100 INFO L85 PathProgramCache]: Analyzing trace with hash 2116714652, now seen corresponding path program 1 times [2022-11-19 08:06:41,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:06:41,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193115928] [2022-11-19 08:06:41,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:06:41,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:06:41,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:06:41,214 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-19 08:06:41,214 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:06:41,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193115928] [2022-11-19 08:06:41,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193115928] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:06:41,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525173884] [2022-11-19 08:06:41,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:06:41,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:06:41,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:06:41,217 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:06:41,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 08:06:41,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:06:41,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 08:06:41,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:06:41,405 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-19 08:06:41,405 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:06:41,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525173884] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:06:41,405 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:06:41,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-19 08:06:41,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138502574] [2022-11-19 08:06:41,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:06:41,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:06:41,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:06:41,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:06:41,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:06:41,408 INFO L87 Difference]: Start difference. First operand 4477 states and 7007 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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 08:06:42,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:06:42,343 INFO L93 Difference]: Finished difference Result 6987 states and 10395 transitions. [2022-11-19 08:06:42,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:06:42,345 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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 111 [2022-11-19 08:06:42,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:06:42,364 INFO L225 Difference]: With dead ends: 6987 [2022-11-19 08:06:42,365 INFO L226 Difference]: Without dead ends: 5529 [2022-11-19 08:06:42,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 111 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 08:06:42,369 INFO L413 NwaCegarLoop]: 3221 mSDtfsCounter, 63 mSDsluCounter, 3159 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 6380 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:06:42,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 6380 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 08:06:42,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5529 states. [2022-11-19 08:06:42,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5529 to 4957. [2022-11-19 08:06:42,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4957 states, 4323 states have (on average 1.6069858894286375) internal successors, (6947), 4338 states have internal predecessors, (6947), 370 states have call successors, (370), 262 states have call predecessors, (370), 262 states have return successors, (370), 357 states have call predecessors, (370), 370 states have call successors, (370) [2022-11-19 08:06:42,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4957 states to 4957 states and 7687 transitions. [2022-11-19 08:06:42,666 INFO L78 Accepts]: Start accepts. Automaton has 4957 states and 7687 transitions. Word has length 111 [2022-11-19 08:06:42,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:06:42,666 INFO L495 AbstractCegarLoop]: Abstraction has 4957 states and 7687 transitions. [2022-11-19 08:06:42,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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 08:06:42,667 INFO L276 IsEmpty]: Start isEmpty. Operand 4957 states and 7687 transitions. [2022-11-19 08:06:42,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-19 08:06:42,676 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:06:42,676 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:06:42,688 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-19 08:06:42,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:06:42,889 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:06:42,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:06:42,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1472199636, now seen corresponding path program 1 times [2022-11-19 08:06:42,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:06:42,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640597324] [2022-11-19 08:06:42,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:06:42,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:06:42,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:06:43,024 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-19 08:06:43,024 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:06:43,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640597324] [2022-11-19 08:06:43,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640597324] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:06:43,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770970976] [2022-11-19 08:06:43,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:06:43,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:06:43,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:06:43,026 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:06:43,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-19 08:06:43,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:06:43,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 08:06:43,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:06:43,220 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-19 08:06:43,221 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:06:43,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770970976] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:06:43,221 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:06:43,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-19 08:06:43,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153046613] [2022-11-19 08:06:43,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:06:43,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:06:43,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:06:43,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:06:43,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:06:43,223 INFO L87 Difference]: Start difference. First operand 4957 states and 7687 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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 08:06:44,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:06:44,003 INFO L93 Difference]: Finished difference Result 7815 states and 11567 transitions. [2022-11-19 08:06:44,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:06:44,003 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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 111 [2022-11-19 08:06:44,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:06:44,037 INFO L225 Difference]: With dead ends: 7815 [2022-11-19 08:06:44,037 INFO L226 Difference]: Without dead ends: 6109 [2022-11-19 08:06:44,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 111 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 08:06:44,044 INFO L413 NwaCegarLoop]: 3216 mSDtfsCounter, 57 mSDsluCounter, 3159 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 6375 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:06:44,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 6375 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 08:06:44,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6109 states. [2022-11-19 08:06:44,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6109 to 5621. [2022-11-19 08:06:44,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5621 states, 4891 states have (on average 1.5863831527295031) internal successors, (7759), 4906 states have internal predecessors, (7759), 418 states have call successors, (418), 310 states have call predecessors, (418), 310 states have return successors, (418), 405 states have call predecessors, (418), 418 states have call successors, (418) [2022-11-19 08:06:44,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5621 states to 5621 states and 8595 transitions. [2022-11-19 08:06:44,390 INFO L78 Accepts]: Start accepts. Automaton has 5621 states and 8595 transitions. Word has length 111 [2022-11-19 08:06:44,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:06:44,390 INFO L495 AbstractCegarLoop]: Abstraction has 5621 states and 8595 transitions. [2022-11-19 08:06:44,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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 08:06:44,391 INFO L276 IsEmpty]: Start isEmpty. Operand 5621 states and 8595 transitions. [2022-11-19 08:06:44,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-19 08:06:44,401 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:06:44,401 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:06:44,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-19 08:06:44,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:06:44,607 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:06:44,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:06:44,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1672549271, now seen corresponding path program 1 times [2022-11-19 08:06:44,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:06:44,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100585278] [2022-11-19 08:06:44,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:06:44,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:06:44,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:06:44,974 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 17 proven. 26 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-19 08:06:44,974 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:06:44,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100585278] [2022-11-19 08:06:44,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100585278] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:06:44,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625178007] [2022-11-19 08:06:44,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:06:44,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:06:44,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:06:44,977 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:06:44,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-19 08:06:45,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:06:45,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 08:06:45,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:06:45,281 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-19 08:06:45,282 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:06:45,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625178007] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:06:45,282 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:06:45,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2022-11-19 08:06:45,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587183492] [2022-11-19 08:06:45,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:06:45,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 08:06:45,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:06:45,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 08:06:45,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:06:45,284 INFO L87 Difference]: Start difference. First operand 5621 states and 8595 transitions. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-19 08:06:46,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:06:46,650 INFO L93 Difference]: Finished difference Result 11073 states and 15837 transitions. [2022-11-19 08:06:46,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 08:06:46,650 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 111 [2022-11-19 08:06:46,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:06:46,675 INFO L225 Difference]: With dead ends: 11073 [2022-11-19 08:06:46,675 INFO L226 Difference]: Without dead ends: 7099 [2022-11-19 08:06:46,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-19 08:06:46,685 INFO L413 NwaCegarLoop]: 3166 mSDtfsCounter, 3560 mSDsluCounter, 6270 mSDsCounter, 0 mSdLazyCounter, 771 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3572 SdHoareTripleChecker+Valid, 9436 SdHoareTripleChecker+Invalid, 875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 771 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 08:06:46,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3572 Valid, 9436 Invalid, 875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 771 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 08:06:46,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7099 states. [2022-11-19 08:06:47,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7099 to 7097. [2022-11-19 08:06:47,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7097 states, 6065 states have (on average 1.523330585325639) internal successors, (9239), 6086 states have internal predecessors, (9239), 592 states have call successors, (592), 438 states have call predecessors, (592), 438 states have return successors, (592), 573 states have call predecessors, (592), 592 states have call successors, (592) [2022-11-19 08:06:47,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7097 states to 7097 states and 10423 transitions. [2022-11-19 08:06:47,262 INFO L78 Accepts]: Start accepts. Automaton has 7097 states and 10423 transitions. Word has length 111 [2022-11-19 08:06:47,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:06:47,263 INFO L495 AbstractCegarLoop]: Abstraction has 7097 states and 10423 transitions. [2022-11-19 08:06:47,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-19 08:06:47,263 INFO L276 IsEmpty]: Start isEmpty. Operand 7097 states and 10423 transitions. [2022-11-19 08:06:47,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-19 08:06:47,276 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:06:47,276 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:06:47,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-19 08:06:47,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-19 08:06:47,487 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:06:47,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:06:47,488 INFO L85 PathProgramCache]: Analyzing trace with hash 276321486, now seen corresponding path program 1 times [2022-11-19 08:06:47,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:06:47,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503358180] [2022-11-19 08:06:47,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:06:47,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:06:47,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:06:47,738 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 19 proven. 25 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-19 08:06:47,738 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:06:47,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503358180] [2022-11-19 08:06:47,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503358180] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:06:47,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088205480] [2022-11-19 08:06:47,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:06:47,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:06:47,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:06:47,741 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:06:47,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-19 08:06:47,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:06:47,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 575 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 08:06:47,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:06:48,019 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-19 08:06:48,019 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:06:48,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088205480] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:06:48,020 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:06:48,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2022-11-19 08:06:48,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985511342] [2022-11-19 08:06:48,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:06:48,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 08:06:48,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:06:48,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 08:06:48,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:06:48,023 INFO L87 Difference]: Start difference. First operand 7097 states and 10423 transitions. Second operand has 6 states, 5 states have (on average 14.4) internal successors, (72), 6 states have internal predecessors, (72), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-19 08:06:49,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:06:49,575 INFO L93 Difference]: Finished difference Result 14609 states and 20208 transitions. [2022-11-19 08:06:49,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 08:06:49,576 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 14.4) internal successors, (72), 6 states have internal predecessors, (72), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 112 [2022-11-19 08:06:49,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:06:49,610 INFO L225 Difference]: With dead ends: 14609 [2022-11-19 08:06:49,610 INFO L226 Difference]: Without dead ends: 9159 [2022-11-19 08:06:49,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-19 08:06:49,733 INFO L413 NwaCegarLoop]: 3158 mSDtfsCounter, 6897 mSDsluCounter, 6224 mSDsCounter, 0 mSdLazyCounter, 742 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6909 SdHoareTripleChecker+Valid, 9382 SdHoareTripleChecker+Invalid, 881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 08:06:49,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6909 Valid, 9382 Invalid, 881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 742 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 08:06:49,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9159 states. [2022-11-19 08:06:50,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9159 to 9157. [2022-11-19 08:06:50,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9157 states, 7695 states have (on average 1.462508122157245) internal successors, (11254), 7725 states have internal predecessors, (11254), 840 states have call successors, (840), 620 states have call predecessors, (840), 620 states have return successors, (840), 812 states have call predecessors, (840), 840 states have call successors, (840) [2022-11-19 08:06:50,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9157 states to 9157 states and 12934 transitions. [2022-11-19 08:06:50,762 INFO L78 Accepts]: Start accepts. Automaton has 9157 states and 12934 transitions. Word has length 112 [2022-11-19 08:06:50,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:06:50,762 INFO L495 AbstractCegarLoop]: Abstraction has 9157 states and 12934 transitions. [2022-11-19 08:06:50,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 14.4) internal successors, (72), 6 states have internal predecessors, (72), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-19 08:06:50,763 INFO L276 IsEmpty]: Start isEmpty. Operand 9157 states and 12934 transitions. [2022-11-19 08:06:50,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-19 08:06:50,782 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:06:50,782 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 08:06:50,791 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-19 08:06:50,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:06:50,988 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:06:50,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:06:50,988 INFO L85 PathProgramCache]: Analyzing trace with hash 978654751, now seen corresponding path program 1 times [2022-11-19 08:06:50,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:06:50,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427967131] [2022-11-19 08:06:50,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:06:50,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:06:51,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:06:51,197 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 20 proven. 30 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-19 08:06:51,197 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:06:51,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427967131] [2022-11-19 08:06:51,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427967131] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:06:51,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790364215] [2022-11-19 08:06:51,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:06:51,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:06:51,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:06:51,200 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:06:51,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-19 08:06:51,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:06:51,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 594 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-19 08:06:51,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:06:51,427 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-19 08:06:51,428 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:06:51,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790364215] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:06:51,428 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:06:51,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 7 [2022-11-19 08:06:51,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119183811] [2022-11-19 08:06:51,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:06:51,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:06:51,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:06:51,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:06:51,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:06:51,431 INFO L87 Difference]: Start difference. First operand 9157 states and 12934 transitions. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-19 08:06:52,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:06:52,596 INFO L93 Difference]: Finished difference Result 12316 states and 17008 transitions. [2022-11-19 08:06:52,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:06:52,597 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 116 [2022-11-19 08:06:52,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:06:52,630 INFO L225 Difference]: With dead ends: 12316 [2022-11-19 08:06:52,630 INFO L226 Difference]: Without dead ends: 9627 [2022-11-19 08:06:52,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-19 08:06:52,641 INFO L413 NwaCegarLoop]: 3220 mSDtfsCounter, 3373 mSDsluCounter, 3302 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3373 SdHoareTripleChecker+Valid, 6522 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:06:52,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3373 Valid, 6522 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 08:06:52,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9627 states. [2022-11-19 08:06:53,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9627 to 9399. [2022-11-19 08:06:53,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9399 states, 7890 states have (on average 1.4574144486692016) internal successors, (11499), 7938 states have internal predecessors, (11499), 847 states have call successors, (847), 624 states have call predecessors, (847), 660 states have return successors, (883), 837 states have call predecessors, (883), 847 states have call successors, (883) [2022-11-19 08:06:53,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9399 states to 9399 states and 13229 transitions. [2022-11-19 08:06:53,451 INFO L78 Accepts]: Start accepts. Automaton has 9399 states and 13229 transitions. Word has length 116 [2022-11-19 08:06:53,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:06:53,452 INFO L495 AbstractCegarLoop]: Abstraction has 9399 states and 13229 transitions. [2022-11-19 08:06:53,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-19 08:06:53,452 INFO L276 IsEmpty]: Start isEmpty. Operand 9399 states and 13229 transitions. [2022-11-19 08:06:53,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-19 08:06:53,471 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:06:53,471 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:06:53,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-19 08:06:53,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-19 08:06:53,677 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:06:53,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:06:53,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1603197332, now seen corresponding path program 1 times [2022-11-19 08:06:53,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:06:53,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646269972] [2022-11-19 08:06:53,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:06:53,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:06:53,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:06:53,744 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 28 proven. 11 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-19 08:06:53,745 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:06:53,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646269972] [2022-11-19 08:06:53,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646269972] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:06:53,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391215873] [2022-11-19 08:06:53,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:06:53,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:06:53,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:06:53,747 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:06:53,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-19 08:06:53,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:06:53,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 08:06:53,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:06:53,919 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-19 08:06:53,919 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:06:53,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391215873] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:06:53,919 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:06:53,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-11-19 08:06:53,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363348773] [2022-11-19 08:06:53,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:06:53,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:06:53,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:06:53,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:06:53,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:06:53,921 INFO L87 Difference]: Start difference. First operand 9399 states and 13229 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-19 08:06:54,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:06:54,960 INFO L93 Difference]: Finished difference Result 12154 states and 16848 transitions. [2022-11-19 08:06:54,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:06:54,961 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 117 [2022-11-19 08:06:54,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:06:54,991 INFO L225 Difference]: With dead ends: 12154 [2022-11-19 08:06:54,992 INFO L226 Difference]: Without dead ends: 9141 [2022-11-19 08:06:55,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 118 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 08:06:55,002 INFO L413 NwaCegarLoop]: 3169 mSDtfsCounter, 22 mSDsluCounter, 3152 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 6321 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:06:55,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 6321 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 472 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 08:06:55,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9141 states. [2022-11-19 08:06:55,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9141 to 8730. [2022-11-19 08:06:55,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8730 states, 7329 states have (on average 1.4719607040523945) internal successors, (10788), 7350 states have internal predecessors, (10788), 811 states have call successors, (811), 588 states have call predecessors, (811), 588 states have return successors, (811), 792 states have call predecessors, (811), 811 states have call successors, (811) [2022-11-19 08:06:55,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8730 states to 8730 states and 12410 transitions. [2022-11-19 08:06:55,820 INFO L78 Accepts]: Start accepts. Automaton has 8730 states and 12410 transitions. Word has length 117 [2022-11-19 08:06:55,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:06:55,821 INFO L495 AbstractCegarLoop]: Abstraction has 8730 states and 12410 transitions. [2022-11-19 08:06:55,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-19 08:06:55,821 INFO L276 IsEmpty]: Start isEmpty. Operand 8730 states and 12410 transitions. [2022-11-19 08:06:55,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-19 08:06:55,841 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:06:55,842 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:06:55,848 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-19 08:06:56,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-19 08:06:56,050 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:06:56,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:06:56,050 INFO L85 PathProgramCache]: Analyzing trace with hash 832971359, now seen corresponding path program 1 times [2022-11-19 08:06:56,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:06:56,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385409743] [2022-11-19 08:06:56,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:06:56,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:06:56,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:06:56,196 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 31 proven. 11 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-19 08:06:56,196 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:06:56,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385409743] [2022-11-19 08:06:56,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385409743] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:06:56,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088107167] [2022-11-19 08:06:56,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:06:56,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:06:56,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:06:56,198 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:06:56,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-19 08:06:56,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:06:56,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 598 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 08:06:56,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:06:56,421 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 08:06:56,422 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:06:56,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088107167] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:06:56,422 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:06:56,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2022-11-19 08:06:56,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82639951] [2022-11-19 08:06:56,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:06:56,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:06:56,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:06:56,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:06:56,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:06:56,425 INFO L87 Difference]: Start difference. First operand 8730 states and 12410 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-19 08:06:57,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:06:57,332 INFO L93 Difference]: Finished difference Result 14729 states and 20254 transitions. [2022-11-19 08:06:57,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:06:57,333 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 117 [2022-11-19 08:06:57,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:06:57,359 INFO L225 Difference]: With dead ends: 14729 [2022-11-19 08:06:57,360 INFO L226 Difference]: Without dead ends: 9757 [2022-11-19 08:06:57,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 119 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 08:06:57,373 INFO L413 NwaCegarLoop]: 3176 mSDtfsCounter, 3344 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3344 SdHoareTripleChecker+Valid, 3207 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:06:57,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3344 Valid, 3207 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 08:06:57,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9757 states. [2022-11-19 08:06:58,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9757 to 9665. [2022-11-19 08:06:58,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9665 states, 8189 states have (on average 1.4359506655269263) internal successors, (11759), 8210 states have internal predecessors, (11759), 821 states have call successors, (821), 653 states have call predecessors, (821), 653 states have return successors, (877), 802 states have call predecessors, (877), 821 states have call successors, (877) [2022-11-19 08:06:58,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9665 states to 9665 states and 13457 transitions. [2022-11-19 08:06:58,135 INFO L78 Accepts]: Start accepts. Automaton has 9665 states and 13457 transitions. Word has length 117 [2022-11-19 08:06:58,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:06:58,135 INFO L495 AbstractCegarLoop]: Abstraction has 9665 states and 13457 transitions. [2022-11-19 08:06:58,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-19 08:06:58,136 INFO L276 IsEmpty]: Start isEmpty. Operand 9665 states and 13457 transitions. [2022-11-19 08:06:58,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-19 08:06:58,149 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:06:58,149 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:06:58,155 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-11-19 08:06:58,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-19 08:06:58,354 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:06:58,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:06:58,355 INFO L85 PathProgramCache]: Analyzing trace with hash -606536065, now seen corresponding path program 1 times [2022-11-19 08:06:58,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:06:58,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055956591] [2022-11-19 08:06:58,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:06:58,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:06:58,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:06:58,410 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 30 proven. 5 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-19 08:06:58,411 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:06:58,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055956591] [2022-11-19 08:06:58,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055956591] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:06:58,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934589430] [2022-11-19 08:06:58,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:06:58,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:06:58,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:06:58,413 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:06:58,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-19 08:06:58,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:06:58,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 592 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 08:06:58,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:06:58,599 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-19 08:06:58,599 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:06:58,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934589430] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:06:58,600 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:06:58,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-11-19 08:06:58,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771549252] [2022-11-19 08:06:58,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:06:58,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:06:58,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:06:58,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:06:58,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:06:58,602 INFO L87 Difference]: Start difference. First operand 9665 states and 13457 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (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 08:06:59,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:06:59,655 INFO L93 Difference]: Finished difference Result 15251 states and 20837 transitions. [2022-11-19 08:06:59,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:06:59,656 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (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 117 [2022-11-19 08:06:59,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:06:59,688 INFO L225 Difference]: With dead ends: 15251 [2022-11-19 08:06:59,688 INFO L226 Difference]: Without dead ends: 9649 [2022-11-19 08:06:59,702 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 118 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 08:06:59,702 INFO L413 NwaCegarLoop]: 3234 mSDtfsCounter, 86 mSDsluCounter, 3146 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 6380 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:06:59,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 6380 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 487 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 08:06:59,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9649 states. [2022-11-19 08:07:00,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9649 to 9537. [2022-11-19 08:07:00,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9537 states, 8061 states have (on average 1.4150849770499938) internal successors, (11407), 8082 states have internal predecessors, (11407), 821 states have call successors, (821), 653 states have call predecessors, (821), 653 states have return successors, (877), 802 states have call predecessors, (877), 821 states have call successors, (877) [2022-11-19 08:07:00,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9537 states to 9537 states and 13105 transitions. [2022-11-19 08:07:00,833 INFO L78 Accepts]: Start accepts. Automaton has 9537 states and 13105 transitions. Word has length 117 [2022-11-19 08:07:00,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:07:00,834 INFO L495 AbstractCegarLoop]: Abstraction has 9537 states and 13105 transitions. [2022-11-19 08:07:00,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (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 08:07:00,834 INFO L276 IsEmpty]: Start isEmpty. Operand 9537 states and 13105 transitions. [2022-11-19 08:07:00,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-19 08:07:00,853 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:07:00,853 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:07:00,863 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-19 08:07:01,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-19 08:07:01,059 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:07:01,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:07:01,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1853205628, now seen corresponding path program 1 times [2022-11-19 08:07:01,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:07:01,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100774427] [2022-11-19 08:07:01,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:07:01,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:07:01,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:07:01,685 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-19 08:07:01,685 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:07:01,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100774427] [2022-11-19 08:07:01,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100774427] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:07:01,686 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:07:01,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-19 08:07:01,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495392784] [2022-11-19 08:07:01,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:07:01,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-19 08:07:01,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:07:01,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-19 08:07:01,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-19 08:07:01,689 INFO L87 Difference]: Start difference. First operand 9537 states and 13105 transitions. Second operand has 11 states, 8 states have (on average 8.75) internal successors, (70), 9 states have internal predecessors, (70), 6 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2022-11-19 08:07:04,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:07:04,906 INFO L93 Difference]: Finished difference Result 21997 states and 29098 transitions. [2022-11-19 08:07:04,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-19 08:07:04,907 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 8.75) internal successors, (70), 9 states have internal predecessors, (70), 6 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) Word has length 114 [2022-11-19 08:07:04,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:07:04,961 INFO L225 Difference]: With dead ends: 21997 [2022-11-19 08:07:04,961 INFO L226 Difference]: Without dead ends: 18009 [2022-11-19 08:07:04,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2022-11-19 08:07:04,980 INFO L413 NwaCegarLoop]: 3124 mSDtfsCounter, 10560 mSDsluCounter, 12533 mSDsCounter, 0 mSdLazyCounter, 1732 mSolverCounterSat, 309 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10575 SdHoareTripleChecker+Valid, 15657 SdHoareTripleChecker+Invalid, 2041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 309 IncrementalHoareTripleChecker+Valid, 1732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:07:04,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10575 Valid, 15657 Invalid, 2041 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [309 Valid, 1732 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-19 08:07:05,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18009 states. [2022-11-19 08:07:06,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18009 to 15807. [2022-11-19 08:07:06,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15807 states, 13287 states have (on average 1.342891548129751) internal successors, (17843), 13320 states have internal predecessors, (17843), 1367 states have call successors, (1367), 1151 states have call predecessors, (1367), 1151 states have return successors, (1464), 1336 states have call predecessors, (1464), 1367 states have call successors, (1464) [2022-11-19 08:07:06,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15807 states to 15807 states and 20674 transitions. [2022-11-19 08:07:06,377 INFO L78 Accepts]: Start accepts. Automaton has 15807 states and 20674 transitions. Word has length 114 [2022-11-19 08:07:06,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:07:06,378 INFO L495 AbstractCegarLoop]: Abstraction has 15807 states and 20674 transitions. [2022-11-19 08:07:06,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 8.75) internal successors, (70), 9 states have internal predecessors, (70), 6 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2022-11-19 08:07:06,378 INFO L276 IsEmpty]: Start isEmpty. Operand 15807 states and 20674 transitions. [2022-11-19 08:07:06,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-19 08:07:06,391 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:07:06,391 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:07:06,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-19 08:07:06,392 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:07:06,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:07:06,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1861587878, now seen corresponding path program 1 times [2022-11-19 08:07:06,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:07:06,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294813731] [2022-11-19 08:07:06,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:07:06,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:07:06,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:07:06,585 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-19 08:07:06,585 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:07:06,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294813731] [2022-11-19 08:07:06,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294813731] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:07:06,586 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:07:06,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 08:07:06,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761820541] [2022-11-19 08:07:06,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:07:06,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:07:06,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:07:06,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:07:06,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:07:06,587 INFO L87 Difference]: Start difference. First operand 15807 states and 20674 transitions. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-19 08:07:08,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:07:08,763 INFO L93 Difference]: Finished difference Result 24037 states and 30733 transitions. [2022-11-19 08:07:08,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 08:07:08,764 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 115 [2022-11-19 08:07:08,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:07:08,817 INFO L225 Difference]: With dead ends: 24037 [2022-11-19 08:07:08,818 INFO L226 Difference]: Without dead ends: 16805 [2022-11-19 08:07:08,835 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:07:08,836 INFO L413 NwaCegarLoop]: 3211 mSDtfsCounter, 94 mSDsluCounter, 9420 mSDsCounter, 0 mSdLazyCounter, 1095 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 12631 SdHoareTripleChecker+Invalid, 1120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1095 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-19 08:07:08,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 12631 Invalid, 1120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1095 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-19 08:07:08,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16805 states. [2022-11-19 08:07:10,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16805 to 16129. [2022-11-19 08:07:10,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16129 states, 13391 states have (on average 1.324994399223359) internal successors, (17743), 13457 states have internal predecessors, (17743), 1494 states have call successors, (1494), 1236 states have call predecessors, (1494), 1242 states have return successors, (1656), 1436 states have call predecessors, (1656), 1494 states have call successors, (1656) [2022-11-19 08:07:10,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16129 states to 16129 states and 20893 transitions. [2022-11-19 08:07:10,228 INFO L78 Accepts]: Start accepts. Automaton has 16129 states and 20893 transitions. Word has length 115 [2022-11-19 08:07:10,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:07:10,228 INFO L495 AbstractCegarLoop]: Abstraction has 16129 states and 20893 transitions. [2022-11-19 08:07:10,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-19 08:07:10,228 INFO L276 IsEmpty]: Start isEmpty. Operand 16129 states and 20893 transitions. [2022-11-19 08:07:10,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-19 08:07:10,236 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:07:10,237 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:07:10,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-19 08:07:10,237 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:07:10,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:07:10,238 INFO L85 PathProgramCache]: Analyzing trace with hash -219100330, now seen corresponding path program 1 times [2022-11-19 08:07:10,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:07:10,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690787848] [2022-11-19 08:07:10,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:07:10,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:07:10,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:07:10,413 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 41 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-19 08:07:10,414 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:07:10,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690787848] [2022-11-19 08:07:10,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690787848] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:07:10,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574578454] [2022-11-19 08:07:10,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:07:10,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:07:10,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:07:10,416 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:07:10,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-19 08:07:10,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:07:10,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 08:07:10,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:07:10,647 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:07:10,647 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:07:10,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574578454] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:07:10,648 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:07:10,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 6 [2022-11-19 08:07:10,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144095938] [2022-11-19 08:07:10,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:07:10,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 08:07:10,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:07:10,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 08:07:10,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:07:10,650 INFO L87 Difference]: Start difference. First operand 16129 states and 20893 transitions. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-19 08:07:13,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:07:13,282 INFO L93 Difference]: Finished difference Result 31038 states and 39132 transitions. [2022-11-19 08:07:13,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 08:07:13,282 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 116 [2022-11-19 08:07:13,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:07:13,332 INFO L225 Difference]: With dead ends: 31038 [2022-11-19 08:07:13,332 INFO L226 Difference]: Without dead ends: 21336 [2022-11-19 08:07:13,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-19 08:07:13,348 INFO L413 NwaCegarLoop]: 3216 mSDtfsCounter, 197 mSDsluCounter, 12486 mSDsCounter, 0 mSdLazyCounter, 1322 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 15702 SdHoareTripleChecker+Invalid, 1373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-19 08:07:13,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 15702 Invalid, 1373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1322 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-19 08:07:13,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21336 states. [2022-11-19 08:07:14,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21336 to 20074. [2022-11-19 08:07:14,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20074 states, 16515 states have (on average 1.2927641537995762) internal successors, (21350), 16578 states have internal predecessors, (21350), 1966 states have call successors, (1966), 1603 states have call predecessors, (1966), 1591 states have return successors, (2260), 1893 states have call predecessors, (2260), 1966 states have call successors, (2260) [2022-11-19 08:07:15,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20074 states to 20074 states and 25576 transitions. [2022-11-19 08:07:15,034 INFO L78 Accepts]: Start accepts. Automaton has 20074 states and 25576 transitions. Word has length 116 [2022-11-19 08:07:15,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:07:15,034 INFO L495 AbstractCegarLoop]: Abstraction has 20074 states and 25576 transitions. [2022-11-19 08:07:15,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-19 08:07:15,035 INFO L276 IsEmpty]: Start isEmpty. Operand 20074 states and 25576 transitions. [2022-11-19 08:07:15,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-11-19 08:07:15,047 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:07:15,047 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:07:15,053 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-19 08:07:15,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-19 08:07:15,253 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:07:15,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:07:15,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1221146207, now seen corresponding path program 1 times [2022-11-19 08:07:15,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:07:15,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671767454] [2022-11-19 08:07:15,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:07:15,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:07:15,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:07:15,433 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 31 proven. 19 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-11-19 08:07:15,433 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:07:15,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671767454] [2022-11-19 08:07:15,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671767454] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:07:15,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091387891] [2022-11-19 08:07:15,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:07:15,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:07:15,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:07:15,436 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:07:15,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-19 08:07:15,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:07:15,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 08:07:15,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:07:15,676 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-19 08:07:15,676 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:07:15,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091387891] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:07:15,677 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:07:15,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2022-11-19 08:07:15,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277777201] [2022-11-19 08:07:15,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:07:15,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:07:15,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:07:15,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:07:15,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:07:15,678 INFO L87 Difference]: Start difference. First operand 20074 states and 25576 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (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 08:07:17,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:07:17,857 INFO L93 Difference]: Finished difference Result 35206 states and 44397 transitions. [2022-11-19 08:07:17,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:07:17,860 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (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 141 [2022-11-19 08:07:17,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:07:17,922 INFO L225 Difference]: With dead ends: 35206 [2022-11-19 08:07:17,923 INFO L226 Difference]: Without dead ends: 22349 [2022-11-19 08:07:17,954 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 143 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 08:07:17,955 INFO L413 NwaCegarLoop]: 3176 mSDtfsCounter, 3345 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3345 SdHoareTripleChecker+Valid, 3207 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:07:17,955 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3345 Valid, 3207 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 08:07:17,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22349 states. [2022-11-19 08:07:19,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22349 to 21575. [2022-11-19 08:07:19,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21575 states, 17881 states have (on average 1.2700072702868968) internal successors, (22709), 18019 states have internal predecessors, (22709), 1966 states have call successors, (1966), 1654 states have call predecessors, (1966), 1726 states have return successors, (2383), 1902 states have call predecessors, (2383), 1966 states have call successors, (2383) [2022-11-19 08:07:19,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21575 states to 21575 states and 27058 transitions. [2022-11-19 08:07:19,902 INFO L78 Accepts]: Start accepts. Automaton has 21575 states and 27058 transitions. Word has length 141 [2022-11-19 08:07:19,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:07:19,903 INFO L495 AbstractCegarLoop]: Abstraction has 21575 states and 27058 transitions. [2022-11-19 08:07:19,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (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 08:07:19,903 INFO L276 IsEmpty]: Start isEmpty. Operand 21575 states and 27058 transitions. [2022-11-19 08:07:19,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-11-19 08:07:19,920 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:07:19,921 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:07:19,931 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-19 08:07:20,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:07:20,126 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:07:20,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:07:20,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1142703804, now seen corresponding path program 1 times [2022-11-19 08:07:20,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:07:20,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432192497] [2022-11-19 08:07:20,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:07:20,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:07:20,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:07:20,190 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 35 proven. 17 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-11-19 08:07:20,191 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:07:20,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432192497] [2022-11-19 08:07:20,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432192497] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:07:20,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203599364] [2022-11-19 08:07:20,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:07:20,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:07:20,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:07:20,193 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:07:20,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-19 08:07:20,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:07:20,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 691 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 08:07:20,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:07:20,399 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 92 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-19 08:07:20,399 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:07:20,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203599364] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:07:20,399 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:07:20,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-11-19 08:07:20,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774674022] [2022-11-19 08:07:20,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:07:20,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:07:20,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:07:20,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:07:20,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:07:20,403 INFO L87 Difference]: Start difference. First operand 21575 states and 27058 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-19 08:07:22,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:07:22,953 INFO L93 Difference]: Finished difference Result 35655 states and 44777 transitions. [2022-11-19 08:07:22,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:07:22,953 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 141 [2022-11-19 08:07:22,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:07:23,016 INFO L225 Difference]: With dead ends: 35655 [2022-11-19 08:07:23,016 INFO L226 Difference]: Without dead ends: 21526 [2022-11-19 08:07:23,044 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 142 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 08:07:23,045 INFO L413 NwaCegarLoop]: 3225 mSDtfsCounter, 85 mSDsluCounter, 3146 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 6371 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:07:23,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 6371 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 483 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 08:07:23,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21526 states. [2022-11-19 08:07:25,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21526 to 21359. [2022-11-19 08:07:25,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21359 states, 17665 states have (on average 1.2407585621285027) internal successors, (21918), 17803 states have internal predecessors, (21918), 1966 states have call successors, (1966), 1654 states have call predecessors, (1966), 1726 states have return successors, (2383), 1902 states have call predecessors, (2383), 1966 states have call successors, (2383) [2022-11-19 08:07:25,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21359 states to 21359 states and 26267 transitions. [2022-11-19 08:07:25,072 INFO L78 Accepts]: Start accepts. Automaton has 21359 states and 26267 transitions. Word has length 141 [2022-11-19 08:07:25,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:07:25,072 INFO L495 AbstractCegarLoop]: Abstraction has 21359 states and 26267 transitions. [2022-11-19 08:07:25,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-19 08:07:25,073 INFO L276 IsEmpty]: Start isEmpty. Operand 21359 states and 26267 transitions. [2022-11-19 08:07:25,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-11-19 08:07:25,088 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:07:25,088 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:07:25,098 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-19 08:07:25,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:07:25,295 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:07:25,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:07:25,295 INFO L85 PathProgramCache]: Analyzing trace with hash -254264135, now seen corresponding path program 1 times [2022-11-19 08:07:25,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:07:25,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357390606] [2022-11-19 08:07:25,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:07:25,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:07:25,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:07:25,515 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 43 proven. 36 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-11-19 08:07:25,515 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:07:25,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357390606] [2022-11-19 08:07:25,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357390606] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:07:25,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105675376] [2022-11-19 08:07:25,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:07:25,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:07:25,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:07:25,534 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:07:25,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-19 08:07:25,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:07:25,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 697 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 08:07:25,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:07:25,800 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-19 08:07:25,800 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:07:25,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105675376] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:07:25,800 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:07:25,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 6 [2022-11-19 08:07:25,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019778475] [2022-11-19 08:07:25,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:07:25,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 08:07:25,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:07:25,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 08:07:25,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:07:25,803 INFO L87 Difference]: Start difference. First operand 21359 states and 26267 transitions. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 5 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-19 08:07:28,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:07:28,960 INFO L93 Difference]: Finished difference Result 41136 states and 49552 transitions. [2022-11-19 08:07:28,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 08:07:28,961 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 5 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 144 [2022-11-19 08:07:28,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:07:29,032 INFO L225 Difference]: With dead ends: 41136 [2022-11-19 08:07:29,032 INFO L226 Difference]: Without dead ends: 27280 [2022-11-19 08:07:29,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-19 08:07:29,062 INFO L413 NwaCegarLoop]: 3213 mSDtfsCounter, 210 mSDsluCounter, 9350 mSDsCounter, 0 mSdLazyCounter, 1050 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 12563 SdHoareTripleChecker+Invalid, 1103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1050 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 08:07:29,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 12563 Invalid, 1103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1050 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 08:07:29,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27280 states. [2022-11-19 08:07:31,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27280 to 25890. [2022-11-19 08:07:31,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25890 states, 21282 states have (on average 1.2168499201202894) internal successors, (25897), 21467 states have internal predecessors, (25897), 2460 states have call successors, (2460), 2046 states have call predecessors, (2460), 2146 states have return successors, (3151), 2377 states have call predecessors, (3151), 2460 states have call successors, (3151) [2022-11-19 08:07:31,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25890 states to 25890 states and 31508 transitions. [2022-11-19 08:07:31,657 INFO L78 Accepts]: Start accepts. Automaton has 25890 states and 31508 transitions. Word has length 144 [2022-11-19 08:07:31,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:07:31,657 INFO L495 AbstractCegarLoop]: Abstraction has 25890 states and 31508 transitions. [2022-11-19 08:07:31,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 5 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-19 08:07:31,657 INFO L276 IsEmpty]: Start isEmpty. Operand 25890 states and 31508 transitions. [2022-11-19 08:07:31,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-11-19 08:07:31,685 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:07:31,685 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:07:31,697 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-19 08:07:31,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-19 08:07:31,892 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:07:31,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:07:31,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1743262222, now seen corresponding path program 1 times [2022-11-19 08:07:31,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:07:31,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252855388] [2022-11-19 08:07:31,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:07:31,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:07:31,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:07:32,511 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 30 proven. 73 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-11-19 08:07:32,511 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:07:32,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252855388] [2022-11-19 08:07:32,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252855388] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:07:32,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115059130] [2022-11-19 08:07:32,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:07:32,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:07:32,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:07:32,515 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:07:32,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-19 08:07:32,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:07:32,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 787 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-19 08:07:32,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:07:32,875 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 112 proven. 14 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-19 08:07:32,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:07:33,265 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 34 proven. 4 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2022-11-19 08:07:33,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115059130] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:07:33,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [155938256] [2022-11-19 08:07:33,288 INFO L159 IcfgInterpreter]: Started Sifa with 74 locations of interest [2022-11-19 08:07:33,294 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:07:33,298 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:07:33,303 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:07:33,303 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:07:46,340 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 113 for LOIs [2022-11-19 08:07:46,372 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 113 for LOIs [2022-11-19 08:07:46,408 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 113 for LOIs [2022-11-19 08:07:46,424 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 60 for LOIs [2022-11-19 08:07:46,434 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 112 for LOIs [2022-11-19 08:07:46,723 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 60 for LOIs [2022-11-19 08:07:47,343 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:08:11,881 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '733534#(and (= ~a15~0 1) (= 5 ~a20~0) (<= |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483647) (= ~t1_pc~0 0) (= ~t1_i~0 1) (= ~a25~0 1) (= ~a~0 1) (= |ULTIMATE.start_start_simulation_~kernel_st~0#1| 1) (<= |ULTIMATE.start_eval_~tmp~0#1| 1) (= ~d~0 4) (= ~a16~0 1) (<= 0 (+ |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483648)) (not (= |ULTIMATE.start_eval_~tmp~0#1| 0)) (= 5 ~e~0) (= ~m_pc~0 1) (= ~m_i~0 1) (= ~a12~0 4) (= ~a9~0 18) (not (= ~token~0 (+ 3 ~local~0))) (= 6 ~f~0) (= 3 ~c~0) (= ~t2_i~0 1) (= 2 ~b~0) (= 0 ~t2_pc~0) (not (= |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 0)) (= ~m_st~0 1) (= |#NULL.offset| 0) (= ~a27~0 1) (<= 0 ~t3_pc~0) (= ~t3_i~0 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_eval_~tmp~0#1|) (= ~a2~0 10) (= |#NULL.base| 0))' at error location [2022-11-19 08:08:11,881 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:08:11,881 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:08:11,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 6] total 21 [2022-11-19 08:08:11,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540466724] [2022-11-19 08:08:11,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:08:11,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-19 08:08:11,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:08:11,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-19 08:08:11,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=519, Invalid=5031, Unknown=0, NotChecked=0, Total=5550 [2022-11-19 08:08:11,885 INFO L87 Difference]: Start difference. First operand 25890 states and 31508 transitions. Second operand has 21 states, 17 states have (on average 10.529411764705882) internal successors, (179), 19 states have internal predecessors, (179), 9 states have call successors, (36), 5 states have call predecessors, (36), 8 states have return successors, (37), 9 states have call predecessors, (37), 9 states have call successors, (37) [2022-11-19 08:08:17,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:08:17,884 INFO L93 Difference]: Finished difference Result 44661 states and 54267 transitions. [2022-11-19 08:08:17,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-11-19 08:08:17,885 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 10.529411764705882) internal successors, (179), 19 states have internal predecessors, (179), 9 states have call successors, (36), 5 states have call predecessors, (36), 8 states have return successors, (37), 9 states have call predecessors, (37), 9 states have call successors, (37) Word has length 159 [2022-11-19 08:08:17,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:08:17,923 INFO L225 Difference]: With dead ends: 44661 [2022-11-19 08:08:17,923 INFO L226 Difference]: Without dead ends: 20378 [2022-11-19 08:08:17,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 590 GetRequests, 432 SyntacticMatches, 23 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9155 ImplicationChecksByTransitivity, 25.7s TimeCoverageRelationStatistics Valid=1274, Invalid=17358, Unknown=0, NotChecked=0, Total=18632 [2022-11-19 08:08:17,972 INFO L413 NwaCegarLoop]: 3303 mSDtfsCounter, 7875 mSDsluCounter, 29885 mSDsCounter, 0 mSdLazyCounter, 4434 mSolverCounterSat, 366 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7886 SdHoareTripleChecker+Valid, 33188 SdHoareTripleChecker+Invalid, 4800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 366 IncrementalHoareTripleChecker+Valid, 4434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:08:17,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7886 Valid, 33188 Invalid, 4800 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [366 Valid, 4434 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-19 08:08:17,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20378 states. [2022-11-19 08:08:19,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20378 to 15381. [2022-11-19 08:08:19,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15381 states, 12867 states have (on average 1.2640087044377089) internal successors, (16264), 12948 states have internal predecessors, (16264), 1300 states have call successors, (1300), 1164 states have call predecessors, (1300), 1212 states have return successors, (1621), 1268 states have call predecessors, (1621), 1300 states have call successors, (1621) [2022-11-19 08:08:19,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15381 states to 15381 states and 19185 transitions. [2022-11-19 08:08:19,646 INFO L78 Accepts]: Start accepts. Automaton has 15381 states and 19185 transitions. Word has length 159 [2022-11-19 08:08:19,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:08:19,646 INFO L495 AbstractCegarLoop]: Abstraction has 15381 states and 19185 transitions. [2022-11-19 08:08:19,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 10.529411764705882) internal successors, (179), 19 states have internal predecessors, (179), 9 states have call successors, (36), 5 states have call predecessors, (36), 8 states have return successors, (37), 9 states have call predecessors, (37), 9 states have call successors, (37) [2022-11-19 08:08:19,647 INFO L276 IsEmpty]: Start isEmpty. Operand 15381 states and 19185 transitions. [2022-11-19 08:08:19,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-11-19 08:08:19,657 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:08:19,657 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1] [2022-11-19 08:08:19,663 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-11-19 08:08:19,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-19 08:08:19,863 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:08:19,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:08:19,864 INFO L85 PathProgramCache]: Analyzing trace with hash 121046904, now seen corresponding path program 1 times [2022-11-19 08:08:19,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:08:19,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130107937] [2022-11-19 08:08:19,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:08:19,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:08:19,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:08:20,105 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 33 proven. 38 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-11-19 08:08:20,105 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:08:20,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130107937] [2022-11-19 08:08:20,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130107937] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:08:20,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920472016] [2022-11-19 08:08:20,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:08:20,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:08:20,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:08:20,107 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:08:20,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-19 08:08:20,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:08:20,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 791 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 08:08:20,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:08:20,480 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 111 proven. 14 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-19 08:08:20,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:08:20,844 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 33 proven. 4 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-11-19 08:08:20,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920472016] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:08:20,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [774979124] [2022-11-19 08:08:20,848 INFO L159 IcfgInterpreter]: Started Sifa with 77 locations of interest [2022-11-19 08:08:20,848 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:08:20,849 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:08:20,849 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:08:20,849 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:08:30,835 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 112 for LOIs [2022-11-19 08:08:30,873 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 112 for LOIs [2022-11-19 08:08:30,903 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 136 for LOIs [2022-11-19 08:08:30,925 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 60 for LOIs [2022-11-19 08:08:30,933 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 60 for LOIs [2022-11-19 08:08:31,028 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 60 for LOIs [2022-11-19 08:08:31,516 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:08:54,723 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '816230#(and (= ~a15~0 1) (= 5 ~a20~0) (<= |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483647) (= ~t1_i~0 1) (= ~a25~0 1) (= ~a~0 1) (= |ULTIMATE.start_start_simulation_~kernel_st~0#1| 1) (<= |ULTIMATE.start_eval_~tmp~0#1| 1) (= ~d~0 4) (= ~a16~0 1) (<= 0 (+ |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483648)) (not (= |ULTIMATE.start_eval_~tmp~0#1| 0)) (= 5 ~e~0) (= ~m_pc~0 1) (= ~m_i~0 1) (= ~a12~0 4) (= ~a9~0 18) (not (= ~token~0 (+ 3 ~local~0))) (= 6 ~f~0) (= 3 ~c~0) (= ~t2_i~0 1) (= 2 ~b~0) (= 0 ~t2_pc~0) (not (= |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 0)) (= ~m_st~0 1) (= |#NULL.offset| 0) (= ~a27~0 1) (<= 0 ~t3_pc~0) (= ~t3_i~0 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_eval_~tmp~0#1|) (= ~a2~0 10) (<= 0 ~t1_pc~0) (= |#NULL.base| 0))' at error location [2022-11-19 08:08:54,723 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:08:54,723 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:08:54,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 6] total 17 [2022-11-19 08:08:54,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032265919] [2022-11-19 08:08:54,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:08:54,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-19 08:08:54,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:08:54,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-19 08:08:54,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=454, Invalid=4802, Unknown=0, NotChecked=0, Total=5256 [2022-11-19 08:08:54,728 INFO L87 Difference]: Start difference. First operand 15381 states and 19185 transitions. Second operand has 17 states, 14 states have (on average 11.428571428571429) internal successors, (160), 15 states have internal predecessors, (160), 7 states have call successors, (33), 4 states have call predecessors, (33), 7 states have return successors, (33), 6 states have call predecessors, (33), 7 states have call successors, (33) [2022-11-19 08:09:00,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:09:00,390 INFO L93 Difference]: Finished difference Result 27232 states and 33287 transitions. [2022-11-19 08:09:00,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-11-19 08:09:00,391 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 11.428571428571429) internal successors, (160), 15 states have internal predecessors, (160), 7 states have call successors, (33), 4 states have call predecessors, (33), 7 states have return successors, (33), 6 states have call predecessors, (33), 7 states have call successors, (33) Word has length 162 [2022-11-19 08:09:00,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:09:00,418 INFO L225 Difference]: With dead ends: 27232 [2022-11-19 08:09:00,418 INFO L226 Difference]: Without dead ends: 13811 [2022-11-19 08:09:00,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 625 GetRequests, 435 SyntacticMatches, 32 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12515 ImplicationChecksByTransitivity, 24.9s TimeCoverageRelationStatistics Valid=1632, Invalid=23808, Unknown=0, NotChecked=0, Total=25440 [2022-11-19 08:09:00,450 INFO L413 NwaCegarLoop]: 3420 mSDtfsCounter, 11013 mSDsluCounter, 30960 mSDsCounter, 0 mSdLazyCounter, 4235 mSolverCounterSat, 262 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11020 SdHoareTripleChecker+Valid, 34380 SdHoareTripleChecker+Invalid, 4497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 262 IncrementalHoareTripleChecker+Valid, 4235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:09:00,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11020 Valid, 34380 Invalid, 4497 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [262 Valid, 4235 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-19 08:09:00,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13811 states. [2022-11-19 08:09:01,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13811 to 11284. [2022-11-19 08:09:01,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11284 states, 9538 states have (on average 1.29555462361082) internal successors, (12357), 9588 states have internal predecessors, (12357), 887 states have call successors, (887), 819 states have call predecessors, (887), 857 states have return successors, (1141), 876 states have call predecessors, (1141), 887 states have call successors, (1141) [2022-11-19 08:09:01,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11284 states to 11284 states and 14385 transitions. [2022-11-19 08:09:01,559 INFO L78 Accepts]: Start accepts. Automaton has 11284 states and 14385 transitions. Word has length 162 [2022-11-19 08:09:01,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:09:01,559 INFO L495 AbstractCegarLoop]: Abstraction has 11284 states and 14385 transitions. [2022-11-19 08:09:01,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 11.428571428571429) internal successors, (160), 15 states have internal predecessors, (160), 7 states have call successors, (33), 4 states have call predecessors, (33), 7 states have return successors, (33), 6 states have call predecessors, (33), 7 states have call successors, (33) [2022-11-19 08:09:01,559 INFO L276 IsEmpty]: Start isEmpty. Operand 11284 states and 14385 transitions. [2022-11-19 08:09:01,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-11-19 08:09:01,565 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:09:01,565 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:09:01,571 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-11-19 08:09:01,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-19 08:09:01,766 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:09:01,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:09:01,766 INFO L85 PathProgramCache]: Analyzing trace with hash -323688370, now seen corresponding path program 1 times [2022-11-19 08:09:01,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:09:01,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073721892] [2022-11-19 08:09:01,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:09:01,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:09:01,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:09:02,510 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 36 proven. 53 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-19 08:09:02,510 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:09:02,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073721892] [2022-11-19 08:09:02,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073721892] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:09:02,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461933395] [2022-11-19 08:09:02,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:09:02,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:09:02,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:09:02,512 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:09:02,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-19 08:09:02,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:09:02,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 796 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 08:09:02,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:09:02,768 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-19 08:09:02,769 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:09:02,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461933395] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:09:02,769 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:09:02,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [18] total 20 [2022-11-19 08:09:02,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559854199] [2022-11-19 08:09:02,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:09:02,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:09:02,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:09:02,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:09:02,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2022-11-19 08:09:02,771 INFO L87 Difference]: Start difference. First operand 11284 states and 14385 transitions. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-11-19 08:09:04,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:09:04,269 INFO L93 Difference]: Finished difference Result 19662 states and 23957 transitions. [2022-11-19 08:09:04,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:09:04,270 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 164 [2022-11-19 08:09:04,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:09:04,287 INFO L225 Difference]: With dead ends: 19662 [2022-11-19 08:09:04,287 INFO L226 Difference]: Without dead ends: 10594 [2022-11-19 08:09:04,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2022-11-19 08:09:04,299 INFO L413 NwaCegarLoop]: 3221 mSDtfsCounter, 3353 mSDsluCounter, 3310 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3353 SdHoareTripleChecker+Valid, 6531 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:09:04,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3353 Valid, 6531 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 516 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 08:09:04,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10594 states. [2022-11-19 08:09:05,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10594 to 10286. [2022-11-19 08:09:05,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10286 states, 8723 states have (on average 1.2956551645076235) internal successors, (11302), 8802 states have internal predecessors, (11302), 782 states have call successors, (782), 714 states have call predecessors, (782), 779 states have return successors, (1028), 769 states have call predecessors, (1028), 782 states have call successors, (1028) [2022-11-19 08:09:05,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10286 states to 10286 states and 13112 transitions. [2022-11-19 08:09:05,500 INFO L78 Accepts]: Start accepts. Automaton has 10286 states and 13112 transitions. Word has length 164 [2022-11-19 08:09:05,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:09:05,500 INFO L495 AbstractCegarLoop]: Abstraction has 10286 states and 13112 transitions. [2022-11-19 08:09:05,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-11-19 08:09:05,501 INFO L276 IsEmpty]: Start isEmpty. Operand 10286 states and 13112 transitions. [2022-11-19 08:09:05,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-11-19 08:09:05,506 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:09:05,506 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:09:05,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-19 08:09:05,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-19 08:09:05,706 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:09:05,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:09:05,707 INFO L85 PathProgramCache]: Analyzing trace with hash 29028627, now seen corresponding path program 1 times [2022-11-19 08:09:05,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:09:05,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639433939] [2022-11-19 08:09:05,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:09:05,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:09:05,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:09:06,457 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 37 proven. 53 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-19 08:09:06,457 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:09:06,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639433939] [2022-11-19 08:09:06,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639433939] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:09:06,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950825005] [2022-11-19 08:09:06,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:09:06,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:09:06,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:09:06,458 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:09:06,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-19 08:09:06,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:09:06,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 803 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-19 08:09:06,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:09:06,963 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 120 proven. 2 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-19 08:09:06,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:09:07,695 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 43 proven. 16 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-11-19 08:09:07,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950825005] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:09:07,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1816980723] [2022-11-19 08:09:07,698 INFO L159 IcfgInterpreter]: Started Sifa with 80 locations of interest [2022-11-19 08:09:07,698 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:09:07,699 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:09:07,699 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:09:07,699 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:09:18,798 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 111 for LOIs [2022-11-19 08:09:18,827 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 111 for LOIs [2022-11-19 08:09:18,854 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 111 for LOIs [2022-11-19 08:09:18,869 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 60 for LOIs [2022-11-19 08:09:18,877 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 60 for LOIs [2022-11-19 08:09:18,953 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 60 for LOIs [2022-11-19 08:09:19,567 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:09:47,745 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '908852#(and (= ~a15~0 1) (= 5 ~a20~0) (<= |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483647) (= ~t1_i~0 1) (= ~a25~0 1) (<= 0 ~t2_pc~0) (= ~a~0 1) (= |ULTIMATE.start_start_simulation_~kernel_st~0#1| 1) (<= |ULTIMATE.start_eval_~tmp~0#1| 1) (= ~d~0 4) (= ~a16~0 1) (<= 0 (+ |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483648)) (not (= |ULTIMATE.start_eval_~tmp~0#1| 0)) (= 5 ~e~0) (= ~m_pc~0 1) (= ~m_i~0 1) (= ~a12~0 4) (= ~a9~0 18) (not (= ~token~0 (+ 3 ~local~0))) (= 6 ~f~0) (= 3 ~c~0) (= ~t2_i~0 1) (= 2 ~b~0) (not (= |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 0)) (= ~m_st~0 1) (= |#NULL.offset| 0) (= ~a27~0 1) (<= 0 ~t3_pc~0) (= ~t3_i~0 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_eval_~tmp~0#1|) (= ~a2~0 10) (<= 0 ~t1_pc~0) (= |#NULL.base| 0))' at error location [2022-11-19 08:09:47,745 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:09:47,746 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:09:47,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 9, 12] total 32 [2022-11-19 08:09:47,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758613137] [2022-11-19 08:09:47,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:09:47,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-19 08:09:47,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:09:47,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-19 08:09:47,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=629, Invalid=7743, Unknown=0, NotChecked=0, Total=8372 [2022-11-19 08:09:47,750 INFO L87 Difference]: Start difference. First operand 10286 states and 13112 transitions. Second operand has 32 states, 20 states have (on average 11.15) internal successors, (223), 25 states have internal predecessors, (223), 13 states have call successors, (42), 9 states have call predecessors, (42), 17 states have return successors, (43), 13 states have call predecessors, (43), 13 states have call successors, (43) [2022-11-19 08:09:56,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:09:56,433 INFO L93 Difference]: Finished difference Result 26778 states and 32368 transitions. [2022-11-19 08:09:56,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-11-19 08:09:56,434 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 20 states have (on average 11.15) internal successors, (223), 25 states have internal predecessors, (223), 13 states have call successors, (42), 9 states have call predecessors, (42), 17 states have return successors, (43), 13 states have call predecessors, (43), 13 states have call successors, (43) Word has length 165 [2022-11-19 08:09:56,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:09:56,470 INFO L225 Difference]: With dead ends: 26778 [2022-11-19 08:09:56,470 INFO L226 Difference]: Without dead ends: 19628 [2022-11-19 08:09:56,485 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 588 GetRequests, 431 SyntacticMatches, 8 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9396 ImplicationChecksByTransitivity, 30.8s TimeCoverageRelationStatistics Valid=2312, Invalid=20338, Unknown=0, NotChecked=0, Total=22650 [2022-11-19 08:09:56,486 INFO L413 NwaCegarLoop]: 3138 mSDtfsCounter, 29361 mSDsluCounter, 25703 mSDsCounter, 0 mSdLazyCounter, 5276 mSolverCounterSat, 1543 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29363 SdHoareTripleChecker+Valid, 28841 SdHoareTripleChecker+Invalid, 6819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1543 IncrementalHoareTripleChecker+Valid, 5276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-11-19 08:09:56,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29363 Valid, 28841 Invalid, 6819 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1543 Valid, 5276 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-11-19 08:09:56,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19628 states. [2022-11-19 08:09:58,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19628 to 13365. [2022-11-19 08:09:58,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13365 states, 11159 states have (on average 1.257549959673806) internal successors, (14033), 11226 states have internal predecessors, (14033), 1144 states have call successors, (1144), 1028 states have call predecessors, (1144), 1060 states have return successors, (1394), 1110 states have call predecessors, (1394), 1144 states have call successors, (1394) [2022-11-19 08:09:58,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13365 states to 13365 states and 16571 transitions. [2022-11-19 08:09:58,058 INFO L78 Accepts]: Start accepts. Automaton has 13365 states and 16571 transitions. Word has length 165 [2022-11-19 08:09:58,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:09:58,058 INFO L495 AbstractCegarLoop]: Abstraction has 13365 states and 16571 transitions. [2022-11-19 08:09:58,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 20 states have (on average 11.15) internal successors, (223), 25 states have internal predecessors, (223), 13 states have call successors, (42), 9 states have call predecessors, (42), 17 states have return successors, (43), 13 states have call predecessors, (43), 13 states have call successors, (43) [2022-11-19 08:09:58,059 INFO L276 IsEmpty]: Start isEmpty. Operand 13365 states and 16571 transitions. [2022-11-19 08:09:58,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-11-19 08:09:58,063 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:09:58,063 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:09:58,068 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-19 08:09:58,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-19 08:09:58,264 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:09:58,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:09:58,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1885162860, now seen corresponding path program 1 times [2022-11-19 08:09:58,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:09:58,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3992637] [2022-11-19 08:09:58,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:09:58,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:09:58,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:09:58,469 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2022-11-19 08:09:58,470 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:09:58,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3992637] [2022-11-19 08:09:58,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3992637] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:09:58,470 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:09:58,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 08:09:58,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789105243] [2022-11-19 08:09:58,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:09:58,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 08:09:58,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:09:58,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 08:09:58,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:09:58,472 INFO L87 Difference]: Start difference. First operand 13365 states and 16571 transitions. Second operand has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 5 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-19 08:10:04,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:10:04,288 INFO L93 Difference]: Finished difference Result 40727 states and 47893 transitions. [2022-11-19 08:10:04,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:10:04,289 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 5 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 173 [2022-11-19 08:10:04,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:10:04,375 INFO L225 Difference]: With dead ends: 40727 [2022-11-19 08:10:04,375 INFO L226 Difference]: Without dead ends: 36739 [2022-11-19 08:10:04,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 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 08:10:04,387 INFO L413 NwaCegarLoop]: 3403 mSDtfsCounter, 3633 mSDsluCounter, 9927 mSDsCounter, 0 mSdLazyCounter, 1467 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3633 SdHoareTripleChecker+Valid, 13330 SdHoareTripleChecker+Invalid, 1477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:10:04,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3633 Valid, 13330 Invalid, 1477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1467 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-19 08:10:04,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36739 states. [2022-11-19 08:10:07,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36739 to 26994. [2022-11-19 08:10:07,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26994 states, 22107 states have (on average 1.1941014158411363) internal successors, (26398), 22227 states have internal predecessors, (26398), 2576 states have call successors, (2576), 2260 states have call predecessors, (2576), 2309 states have return successors, (3182), 2506 states have call predecessors, (3182), 2576 states have call successors, (3182) [2022-11-19 08:10:07,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26994 states to 26994 states and 32156 transitions. [2022-11-19 08:10:07,882 INFO L78 Accepts]: Start accepts. Automaton has 26994 states and 32156 transitions. Word has length 173 [2022-11-19 08:10:07,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:10:07,882 INFO L495 AbstractCegarLoop]: Abstraction has 26994 states and 32156 transitions. [2022-11-19 08:10:07,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 5 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-19 08:10:07,883 INFO L276 IsEmpty]: Start isEmpty. Operand 26994 states and 32156 transitions. [2022-11-19 08:10:07,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-11-19 08:10:07,892 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:10:07,892 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:10:07,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-11-19 08:10:07,892 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:10:07,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:10:07,893 INFO L85 PathProgramCache]: Analyzing trace with hash -717028270, now seen corresponding path program 1 times [2022-11-19 08:10:07,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:10:07,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173827981] [2022-11-19 08:10:07,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:10:07,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:10:07,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:10:08,887 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 40 proven. 75 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-11-19 08:10:08,888 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:10:08,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173827981] [2022-11-19 08:10:08,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173827981] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:10:08,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321133441] [2022-11-19 08:10:08,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:10:08,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:10:08,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:10:08,889 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:10:08,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-19 08:10:09,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:10:09,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 903 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-19 08:10:09,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:10:09,337 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 137 proven. 2 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-11-19 08:10:09,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:10:09,839 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 49 proven. 18 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2022-11-19 08:10:09,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321133441] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:10:09,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1958557082] [2022-11-19 08:10:09,843 INFO L159 IcfgInterpreter]: Started Sifa with 83 locations of interest [2022-11-19 08:10:09,843 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:10:09,844 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:10:09,844 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:10:09,844 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:10:19,760 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 111 for LOIs [2022-11-19 08:10:19,787 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 111 for LOIs [2022-11-19 08:10:19,815 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 111 for LOIs [2022-11-19 08:10:19,828 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 60 for LOIs [2022-11-19 08:10:19,839 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 60 for LOIs [2022-11-19 08:10:19,932 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 60 for LOIs [2022-11-19 08:10:20,581 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:10:44,601 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1055064#(and (= ~a15~0 1) (= 5 ~a20~0) (<= |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483647) (= ~t1_i~0 1) (= ~a25~0 1) (<= 0 ~t2_pc~0) (= ~a~0 1) (= |ULTIMATE.start_start_simulation_~kernel_st~0#1| 1) (<= |ULTIMATE.start_eval_~tmp~0#1| 1) (= ~d~0 4) (= ~a16~0 1) (<= 0 (+ |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483648)) (not (= |ULTIMATE.start_eval_~tmp~0#1| 0)) (= 5 ~e~0) (= ~m_pc~0 1) (= ~m_i~0 1) (= ~a12~0 4) (= ~a9~0 18) (not (= ~token~0 (+ 3 ~local~0))) (= 6 ~f~0) (= 3 ~c~0) (= ~t2_i~0 1) (= 2 ~b~0) (not (= |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 0)) (= ~m_st~0 1) (= |#NULL.offset| 0) (= ~a27~0 1) (<= 0 ~t3_pc~0) (= ~t3_i~0 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_eval_~tmp~0#1|) (= ~a2~0 10) (<= 0 ~t1_pc~0) (= |#NULL.base| 0))' at error location [2022-11-19 08:10:44,601 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:10:44,601 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:10:44,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 6, 12] total 31 [2022-11-19 08:10:44,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9304591] [2022-11-19 08:10:44,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:10:44,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-19 08:10:44,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:10:44,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-19 08:10:44,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=624, Invalid=8118, Unknown=0, NotChecked=0, Total=8742 [2022-11-19 08:10:44,605 INFO L87 Difference]: Start difference. First operand 26994 states and 32156 transitions. Second operand has 31 states, 20 states have (on average 11.25) internal successors, (225), 23 states have internal predecessors, (225), 13 states have call successors, (42), 8 states have call predecessors, (42), 16 states have return successors, (43), 13 states have call predecessors, (43), 13 states have call successors, (43) [2022-11-19 08:10:51,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:10:51,262 INFO L93 Difference]: Finished difference Result 35487 states and 41823 transitions. [2022-11-19 08:10:51,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-11-19 08:10:51,263 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 20 states have (on average 11.25) internal successors, (225), 23 states have internal predecessors, (225), 13 states have call successors, (42), 8 states have call predecessors, (42), 16 states have return successors, (43), 13 states have call predecessors, (43), 13 states have call successors, (43) Word has length 191 [2022-11-19 08:10:51,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:10:51,289 INFO L225 Difference]: With dead ends: 35487 [2022-11-19 08:10:51,290 INFO L226 Difference]: Without dead ends: 11099 [2022-11-19 08:10:51,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 665 GetRequests, 508 SyntacticMatches, 9 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9605 ImplicationChecksByTransitivity, 25.9s TimeCoverageRelationStatistics Valid=2187, Invalid=20163, Unknown=0, NotChecked=0, Total=22350 [2022-11-19 08:10:51,325 INFO L413 NwaCegarLoop]: 3129 mSDtfsCounter, 32672 mSDsluCounter, 28101 mSDsCounter, 0 mSdLazyCounter, 4602 mSolverCounterSat, 1262 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32674 SdHoareTripleChecker+Valid, 31230 SdHoareTripleChecker+Invalid, 5864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1262 IncrementalHoareTripleChecker+Valid, 4602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-19 08:10:51,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32674 Valid, 31230 Invalid, 5864 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1262 Valid, 4602 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-11-19 08:10:51,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11099 states. [2022-11-19 08:10:52,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11099 to 8666. [2022-11-19 08:10:52,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8666 states, 7363 states have (on average 1.3118294173570555) internal successors, (9659), 7389 states have internal predecessors, (9659), 688 states have call successors, (688), 621 states have call predecessors, (688), 613 states have return successors, (702), 655 states have call predecessors, (702), 688 states have call successors, (702) [2022-11-19 08:10:52,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8666 states to 8666 states and 11049 transitions. [2022-11-19 08:10:52,624 INFO L78 Accepts]: Start accepts. Automaton has 8666 states and 11049 transitions. Word has length 191 [2022-11-19 08:10:52,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:10:52,624 INFO L495 AbstractCegarLoop]: Abstraction has 8666 states and 11049 transitions. [2022-11-19 08:10:52,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 20 states have (on average 11.25) internal successors, (225), 23 states have internal predecessors, (225), 13 states have call successors, (42), 8 states have call predecessors, (42), 16 states have return successors, (43), 13 states have call predecessors, (43), 13 states have call successors, (43) [2022-11-19 08:10:52,625 INFO L276 IsEmpty]: Start isEmpty. Operand 8666 states and 11049 transitions. [2022-11-19 08:10:52,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2022-11-19 08:10:52,628 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:10:52,629 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:10:52,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-19 08:10:52,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:10:52,829 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:10:52,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:10:52,830 INFO L85 PathProgramCache]: Analyzing trace with hash -1462225206, now seen corresponding path program 1 times [2022-11-19 08:10:52,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:10:52,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991276421] [2022-11-19 08:10:52,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:10:52,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:10:52,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:10:53,039 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 91 proven. 70 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2022-11-19 08:10:53,040 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:10:53,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991276421] [2022-11-19 08:10:53,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991276421] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:10:53,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996354066] [2022-11-19 08:10:53,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:10:53,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:10:53,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:10:53,042 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:10:53,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-19 08:10:53,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:10:53,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 945 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-19 08:10:53,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:10:53,304 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 201 proven. 0 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-11-19 08:10:53,305 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:10:53,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996354066] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:10:53,305 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:10:53,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 7 [2022-11-19 08:10:53,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133406803] [2022-11-19 08:10:53,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:10:53,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:10:53,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:10:53,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:10:53,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:10:53,308 INFO L87 Difference]: Start difference. First operand 8666 states and 11049 transitions. Second operand has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-19 08:10:55,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:10:55,132 INFO L93 Difference]: Finished difference Result 15650 states and 18720 transitions. [2022-11-19 08:10:55,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:10:55,132 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 210 [2022-11-19 08:10:55,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:10:55,147 INFO L225 Difference]: With dead ends: 15650 [2022-11-19 08:10:55,147 INFO L226 Difference]: Without dead ends: 9364 [2022-11-19 08:10:55,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-19 08:10:55,156 INFO L413 NwaCegarLoop]: 3245 mSDtfsCounter, 3354 mSDsluCounter, 3325 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3354 SdHoareTripleChecker+Valid, 6570 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:10:55,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3354 Valid, 6570 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 08:10:55,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9364 states. [2022-11-19 08:10:56,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9364 to 9092. [2022-11-19 08:10:56,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9092 states, 7688 states have (on average 1.2870707596253903) internal successors, (9895), 7721 states have internal predecessors, (9895), 747 states have call successors, (747), 663 states have call predecessors, (747), 655 states have return successors, (761), 707 states have call predecessors, (761), 747 states have call successors, (761) [2022-11-19 08:10:56,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9092 states to 9092 states and 11403 transitions. [2022-11-19 08:10:56,441 INFO L78 Accepts]: Start accepts. Automaton has 9092 states and 11403 transitions. Word has length 210 [2022-11-19 08:10:56,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:10:56,442 INFO L495 AbstractCegarLoop]: Abstraction has 9092 states and 11403 transitions. [2022-11-19 08:10:56,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-19 08:10:56,442 INFO L276 IsEmpty]: Start isEmpty. Operand 9092 states and 11403 transitions. [2022-11-19 08:10:56,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2022-11-19 08:10:56,447 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:10:56,447 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:10:56,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-19 08:10:56,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:10:56,648 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:10:56,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:10:56,649 INFO L85 PathProgramCache]: Analyzing trace with hash 169315026, now seen corresponding path program 2 times [2022-11-19 08:10:56,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:10:56,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947211012] [2022-11-19 08:10:56,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:10:56,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:10:56,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:10:56,826 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 53 proven. 63 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2022-11-19 08:10:56,826 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:10:56,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947211012] [2022-11-19 08:10:56,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947211012] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:10:56,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338276286] [2022-11-19 08:10:56,827 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:10:56,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:10:56,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:10:56,828 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:10:56,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-19 08:10:56,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-19 08:10:56,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:10:56,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-19 08:10:56,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:10:57,005 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 202 proven. 0 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2022-11-19 08:10:57,005 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:10:57,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338276286] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:10:57,006 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:10:57,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 7 [2022-11-19 08:10:57,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820634884] [2022-11-19 08:10:57,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:10:57,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:10:57,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:10:57,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:10:57,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:10:57,007 INFO L87 Difference]: Start difference. First operand 9092 states and 11403 transitions. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-19 08:10:58,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:10:58,512 INFO L93 Difference]: Finished difference Result 13080 states and 15708 transitions. [2022-11-19 08:10:58,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:10:58,512 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) Word has length 210 [2022-11-19 08:10:58,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:10:58,525 INFO L225 Difference]: With dead ends: 13080 [2022-11-19 08:10:58,525 INFO L226 Difference]: Without dead ends: 7569 [2022-11-19 08:10:58,532 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-19 08:10:58,533 INFO L413 NwaCegarLoop]: 3213 mSDtfsCounter, 3366 mSDsluCounter, 3303 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3366 SdHoareTripleChecker+Valid, 6516 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:10:58,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3366 Valid, 6516 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 08:10:58,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7569 states. [2022-11-19 08:10:59,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7569 to 7150. [2022-11-19 08:10:59,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7150 states, 6137 states have (on average 1.334854163271957) internal successors, (8192), 6162 states have internal predecessors, (8192), 535 states have call successors, (535), 479 states have call predecessors, (535), 476 states have return successors, (543), 508 states have call predecessors, (543), 535 states have call successors, (543) [2022-11-19 08:10:59,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7150 states to 7150 states and 9270 transitions. [2022-11-19 08:10:59,494 INFO L78 Accepts]: Start accepts. Automaton has 7150 states and 9270 transitions. Word has length 210 [2022-11-19 08:10:59,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:10:59,495 INFO L495 AbstractCegarLoop]: Abstraction has 7150 states and 9270 transitions. [2022-11-19 08:10:59,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-19 08:10:59,495 INFO L276 IsEmpty]: Start isEmpty. Operand 7150 states and 9270 transitions. [2022-11-19 08:10:59,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2022-11-19 08:10:59,499 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:10:59,499 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:10:59,504 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-19 08:10:59,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-11-19 08:10:59,700 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:10:59,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:10:59,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1445455135, now seen corresponding path program 1 times [2022-11-19 08:10:59,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:10:59,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899065804] [2022-11-19 08:10:59,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:10:59,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:10:59,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:11:00,061 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 156 proven. 38 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-11-19 08:11:00,061 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:11:00,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899065804] [2022-11-19 08:11:00,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899065804] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:11:00,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424698708] [2022-11-19 08:11:00,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:11:00,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:11:00,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:11:00,063 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:11:00,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-19 08:11:00,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:11:00,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 952 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-19 08:11:00,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:11:00,380 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 255 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-11-19 08:11:00,380 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:11:00,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424698708] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:11:00,380 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:11:00,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 5 [2022-11-19 08:11:00,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333792410] [2022-11-19 08:11:00,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:11:00,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:11:00,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:11:00,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:11:00,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:11:00,382 INFO L87 Difference]: Start difference. First operand 7150 states and 9270 transitions. Second operand has 5 states, 5 states have (on average 26.4) internal successors, (132), 5 states have internal predecessors, (132), 4 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-11-19 08:11:01,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:11:01,479 INFO L93 Difference]: Finished difference Result 8158 states and 10365 transitions. [2022-11-19 08:11:01,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 08:11:01,479 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.4) internal successors, (132), 5 states have internal predecessors, (132), 4 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 211 [2022-11-19 08:11:01,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:11:01,484 INFO L225 Difference]: With dead ends: 8158 [2022-11-19 08:11:01,484 INFO L226 Difference]: Without dead ends: 2895 [2022-11-19 08:11:01,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:11:01,490 INFO L413 NwaCegarLoop]: 3186 mSDtfsCounter, 87 mSDsluCounter, 6256 mSDsCounter, 0 mSdLazyCounter, 787 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 9442 SdHoareTripleChecker+Invalid, 807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 08:11:01,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 9442 Invalid, 807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 787 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 08:11:01,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2895 states. [2022-11-19 08:11:01,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2895 to 2841. [2022-11-19 08:11:01,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2841 states, 2611 states have (on average 1.6595174262734584) internal successors, (4333), 2616 states have internal predecessors, (4333), 124 states have call successors, (124), 105 states have call predecessors, (124), 104 states have return successors, (127), 119 states have call predecessors, (127), 124 states have call successors, (127) [2022-11-19 08:11:01,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2841 states to 2841 states and 4584 transitions. [2022-11-19 08:11:01,710 INFO L78 Accepts]: Start accepts. Automaton has 2841 states and 4584 transitions. Word has length 211 [2022-11-19 08:11:01,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:11:01,711 INFO L495 AbstractCegarLoop]: Abstraction has 2841 states and 4584 transitions. [2022-11-19 08:11:01,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.4) internal successors, (132), 5 states have internal predecessors, (132), 4 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-11-19 08:11:01,711 INFO L276 IsEmpty]: Start isEmpty. Operand 2841 states and 4584 transitions. [2022-11-19 08:11:01,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2022-11-19 08:11:01,714 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:11:01,714 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 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, 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] [2022-11-19 08:11:01,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-19 08:11:01,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-11-19 08:11:01,915 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:11:01,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:11:01,915 INFO L85 PathProgramCache]: Analyzing trace with hash 498282444, now seen corresponding path program 1 times [2022-11-19 08:11:01,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:11:01,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545516002] [2022-11-19 08:11:01,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:11:01,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:11:01,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:11:02,260 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 44 proven. 91 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2022-11-19 08:11:02,268 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:11:02,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545516002] [2022-11-19 08:11:02,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545516002] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:11:02,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097512199] [2022-11-19 08:11:02,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:11:02,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:11:02,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:11:02,270 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:11:02,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-19 08:11:02,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:11:02,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 1381 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 08:11:02,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:11:02,787 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 467 proven. 105 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2022-11-19 08:11:02,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:11:03,161 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 184 proven. 0 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2022-11-19 08:11:03,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097512199] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-19 08:11:03,162 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:11:03,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 6] total 17 [2022-11-19 08:11:03,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791206546] [2022-11-19 08:11:03,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:11:03,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 08:11:03,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:11:03,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 08:11:03,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-11-19 08:11:03,164 INFO L87 Difference]: Start difference. First operand 2841 states and 4584 transitions. Second operand has 7 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 4 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2022-11-19 08:11:04,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:11:04,038 INFO L93 Difference]: Finished difference Result 3087 states and 4848 transitions. [2022-11-19 08:11:04,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:11:04,038 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 4 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 311 [2022-11-19 08:11:04,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:11:04,042 INFO L225 Difference]: With dead ends: 3087 [2022-11-19 08:11:04,042 INFO L226 Difference]: Without dead ends: 1642 [2022-11-19 08:11:04,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 630 GetRequests, 614 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2022-11-19 08:11:04,044 INFO L413 NwaCegarLoop]: 3152 mSDtfsCounter, 10060 mSDsluCounter, 3118 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10061 SdHoareTripleChecker+Valid, 6270 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:11:04,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10061 Valid, 6270 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 08:11:04,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1642 states. [2022-11-19 08:11:04,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1642 to 1642. [2022-11-19 08:11:04,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1642 states, 1641 states have (on average 1.9914686166971358) internal successors, (3268), 1641 states have internal predecessors, (3268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:11:04,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1642 states to 1642 states and 3268 transitions. [2022-11-19 08:11:04,067 INFO L78 Accepts]: Start accepts. Automaton has 1642 states and 3268 transitions. Word has length 311 [2022-11-19 08:11:04,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:11:04,067 INFO L495 AbstractCegarLoop]: Abstraction has 1642 states and 3268 transitions. [2022-11-19 08:11:04,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 4 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2022-11-19 08:11:04,067 INFO L276 IsEmpty]: Start isEmpty. Operand 1642 states and 3268 transitions. [2022-11-19 08:11:04,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1633 [2022-11-19 08:11:04,093 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:11:04,094 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:11:04,102 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-19 08:11:04,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a08c88c-bae8-42a8-9c3b-4b3b54987a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:11:04,301 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:11:04,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:11:04,302 INFO L85 PathProgramCache]: Analyzing trace with hash -521938247, now seen corresponding path program 1 times [2022-11-19 08:11:04,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:11:04,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065665590] [2022-11-19 08:11:04,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:11:04,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:11:04,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:11:05,890 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 08:11:05,890 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:11:05,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065665590] [2022-11-19 08:11:05,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065665590] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:11:05,891 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:11:05,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 08:11:05,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518540162] [2022-11-19 08:11:05,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:11:05,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:11:05,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:11:05,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:11:05,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:11:05,894 INFO L87 Difference]: Start difference. First operand 1642 states and 3268 transitions. Second operand has 3 states, 3 states have (on average 544.0) internal successors, (1632), 2 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:11:13,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:11:13,135 INFO L93 Difference]: Finished difference Result 4920 states and 9799 transitions. [2022-11-19 08:11:13,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:11:13,136 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 544.0) internal successors, (1632), 2 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1632 [2022-11-19 08:11:13,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:11:13,142 INFO L225 Difference]: With dead ends: 4920 [2022-11-19 08:11:13,142 INFO L226 Difference]: Without dead ends: 3280 [2022-11-19 08:11:13,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 08:11:13,145 INFO L413 NwaCegarLoop]: 612 mSDtfsCounter, 57 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 4908 mSolverCounterSat, 2225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 623 SdHoareTripleChecker+Invalid, 7133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2225 IncrementalHoareTripleChecker+Valid, 4908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:11:13,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 623 Invalid, 7133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2225 Valid, 4908 Invalid, 0 Unknown, 0 Unchecked, 7.1s Time] [2022-11-19 08:11:13,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3280 states. [2022-11-19 08:11:13,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3280 to 3280. [2022-11-19 08:11:13,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3280 states, 3279 states have (on average 1.7834705702958218) internal successors, (5848), 3279 states have internal predecessors, (5848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:11:13,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3280 states to 3280 states and 5848 transitions. [2022-11-19 08:11:13,181 INFO L78 Accepts]: Start accepts. Automaton has 3280 states and 5848 transitions. Word has length 1632 [2022-11-19 08:11:13,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:11:13,182 INFO L495 AbstractCegarLoop]: Abstraction has 3280 states and 5848 transitions. [2022-11-19 08:11:13,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 544.0) internal successors, (1632), 2 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:11:13,183 INFO L276 IsEmpty]: Start isEmpty. Operand 3280 states and 5848 transitions. [2022-11-19 08:11:13,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1641 [2022-11-19 08:11:13,206 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:11:13,207 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:11:13,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-11-19 08:11:13,207 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:11:13,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:11:13,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1147604075, now seen corresponding path program 1 times [2022-11-19 08:11:13,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:11:13,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390774800] [2022-11-19 08:11:13,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:11:13,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:11:13,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:11:14,095 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:11:14,096 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:11:14,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390774800] [2022-11-19 08:11:14,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390774800] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:11:14,096 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:11:14,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 08:11:14,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108684298] [2022-11-19 08:11:14,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:11:14,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:11:14,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:11:14,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:11:14,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:11:14,100 INFO L87 Difference]: Start difference. First operand 3280 states and 5848 transitions. Second operand has 3 states, 3 states have (on average 546.6666666666666) internal successors, (1640), 2 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:11:21,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:11:21,563 INFO L93 Difference]: Finished difference Result 9834 states and 17539 transitions. [2022-11-19 08:11:21,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:11:21,564 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 546.6666666666666) internal successors, (1640), 2 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1640 [2022-11-19 08:11:21,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:11:21,572 INFO L225 Difference]: With dead ends: 9834 [2022-11-19 08:11:21,573 INFO L226 Difference]: Without dead ends: 6556 [2022-11-19 08:11:21,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 08:11:21,577 INFO L413 NwaCegarLoop]: 1122 mSDtfsCounter, 1680 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 5574 mSolverCounterSat, 1313 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1680 SdHoareTripleChecker+Valid, 1133 SdHoareTripleChecker+Invalid, 6887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1313 IncrementalHoareTripleChecker+Valid, 5574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:11:21,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1680 Valid, 1133 Invalid, 6887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1313 Valid, 5574 Invalid, 0 Unknown, 0 Unchecked, 7.3s Time] [2022-11-19 08:11:21,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6556 states. [2022-11-19 08:11:21,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6556 to 6556. [2022-11-19 08:11:21,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6556 states, 6555 states have (on average 1.5356216628527841) internal successors, (10066), 6555 states have internal predecessors, (10066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:11:21,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6556 states to 6556 states and 10066 transitions. [2022-11-19 08:11:21,653 INFO L78 Accepts]: Start accepts. Automaton has 6556 states and 10066 transitions. Word has length 1640 [2022-11-19 08:11:21,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:11:21,654 INFO L495 AbstractCegarLoop]: Abstraction has 6556 states and 10066 transitions. [2022-11-19 08:11:21,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 546.6666666666666) internal successors, (1640), 2 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:11:21,655 INFO L276 IsEmpty]: Start isEmpty. Operand 6556 states and 10066 transitions. [2022-11-19 08:11:21,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1648 [2022-11-19 08:11:21,681 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:11:21,681 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:11:21,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-11-19 08:11:21,682 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:11:21,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:11:21,683 INFO L85 PathProgramCache]: Analyzing trace with hash 491229065, now seen corresponding path program 1 times [2022-11-19 08:11:21,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:11:21,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882634871] [2022-11-19 08:11:21,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:11:21,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:11:21,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:11:22,653 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:11:22,653 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:11:22,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882634871] [2022-11-19 08:11:22,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882634871] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:11:22,654 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:11:22,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:11:22,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862474976] [2022-11-19 08:11:22,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:11:22,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:11:22,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:11:22,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:11:22,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:11:22,657 INFO L87 Difference]: Start difference. First operand 6556 states and 10066 transitions. Second operand has 3 states, 3 states have (on average 549.0) internal successors, (1647), 3 states have internal predecessors, (1647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:11:30,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:11:30,262 INFO L93 Difference]: Finished difference Result 19662 states and 30193 transitions. [2022-11-19 08:11:30,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:11:30,263 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 549.0) internal successors, (1647), 3 states have internal predecessors, (1647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1647 [2022-11-19 08:11:30,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:11:30,278 INFO L225 Difference]: With dead ends: 19662 [2022-11-19 08:11:30,278 INFO L226 Difference]: Without dead ends: 13108 [2022-11-19 08:11:30,285 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 08:11:30,285 INFO L413 NwaCegarLoop]: 2943 mSDtfsCounter, 1679 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 4774 mSolverCounterSat, 2062 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1679 SdHoareTripleChecker+Valid, 2955 SdHoareTripleChecker+Invalid, 6836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2062 IncrementalHoareTripleChecker+Valid, 4774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:11:30,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1679 Valid, 2955 Invalid, 6836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2062 Valid, 4774 Invalid, 0 Unknown, 0 Unchecked, 7.4s Time] [2022-11-19 08:11:30,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13108 states. [2022-11-19 08:11:30,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13108 to 13108. [2022-11-19 08:11:30,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13108 states, 13107 states have (on average 1.3360799572747386) internal successors, (17512), 13107 states have internal predecessors, (17512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:11:30,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13108 states to 13108 states and 17512 transitions. [2022-11-19 08:11:30,420 INFO L78 Accepts]: Start accepts. Automaton has 13108 states and 17512 transitions. Word has length 1647 [2022-11-19 08:11:30,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:11:30,420 INFO L495 AbstractCegarLoop]: Abstraction has 13108 states and 17512 transitions. [2022-11-19 08:11:30,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 549.0) internal successors, (1647), 3 states have internal predecessors, (1647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:11:30,421 INFO L276 IsEmpty]: Start isEmpty. Operand 13108 states and 17512 transitions. [2022-11-19 08:11:30,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1659 [2022-11-19 08:11:30,450 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:11:30,451 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:11:30,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-11-19 08:11:30,451 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:11:30,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:11:30,452 INFO L85 PathProgramCache]: Analyzing trace with hash 873969309, now seen corresponding path program 1 times [2022-11-19 08:11:30,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:11:30,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755773697] [2022-11-19 08:11:30,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:11:30,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:11:30,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:11:31,334 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:11:31,334 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:11:31,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755773697] [2022-11-19 08:11:31,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755773697] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:11:31,334 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:11:31,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:11:31,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662858092] [2022-11-19 08:11:31,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:11:31,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:11:31,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:11:31,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:11:31,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:11:31,338 INFO L87 Difference]: Start difference. First operand 13108 states and 17512 transitions. Second operand has 3 states, 3 states have (on average 552.6666666666666) internal successors, (1658), 3 states have internal predecessors, (1658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:11:38,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:11:38,691 INFO L93 Difference]: Finished difference Result 39318 states and 52531 transitions. [2022-11-19 08:11:38,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:11:38,692 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 552.6666666666666) internal successors, (1658), 3 states have internal predecessors, (1658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1658 [2022-11-19 08:11:38,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:11:38,724 INFO L225 Difference]: With dead ends: 39318 [2022-11-19 08:11:38,725 INFO L226 Difference]: Without dead ends: 26212 [2022-11-19 08:11:38,736 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 08:11:38,737 INFO L413 NwaCegarLoop]: 2497 mSDtfsCounter, 1768 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 6067 mSolverCounterSat, 841 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1768 SdHoareTripleChecker+Valid, 2509 SdHoareTripleChecker+Invalid, 6908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 841 IncrementalHoareTripleChecker+Valid, 6067 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:11:38,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1768 Valid, 2509 Invalid, 6908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [841 Valid, 6067 Invalid, 0 Unknown, 0 Unchecked, 7.0s Time] [2022-11-19 08:11:38,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26212 states. [2022-11-19 08:11:39,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26212 to 26212. [2022-11-19 08:11:39,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26212 states, 26211 states have (on average 1.263515317996261) internal successors, (33118), 26211 states have internal predecessors, (33118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:11:39,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26212 states to 26212 states and 33118 transitions. [2022-11-19 08:11:39,138 INFO L78 Accepts]: Start accepts. Automaton has 26212 states and 33118 transitions. Word has length 1658 [2022-11-19 08:11:39,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:11:39,138 INFO L495 AbstractCegarLoop]: Abstraction has 26212 states and 33118 transitions. [2022-11-19 08:11:39,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 552.6666666666666) internal successors, (1658), 3 states have internal predecessors, (1658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:11:39,139 INFO L276 IsEmpty]: Start isEmpty. Operand 26212 states and 33118 transitions. [2022-11-19 08:11:39,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1670 [2022-11-19 08:11:39,181 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:11:39,182 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:11:39,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-11-19 08:11:39,182 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:11:39,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:11:39,183 INFO L85 PathProgramCache]: Analyzing trace with hash 2106622334, now seen corresponding path program 1 times [2022-11-19 08:11:39,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:11:39,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587807501] [2022-11-19 08:11:39,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:11:39,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:11:39,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:11:39,931 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:11:39,931 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:11:39,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587807501] [2022-11-19 08:11:39,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587807501] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:11:39,931 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:11:39,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 08:11:39,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100996752] [2022-11-19 08:11:39,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:11:39,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:11:39,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:11:39,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:11:39,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:11:39,935 INFO L87 Difference]: Start difference. First operand 26212 states and 33118 transitions. Second operand has 3 states, 3 states have (on average 556.3333333333334) internal successors, (1669), 2 states have internal predecessors, (1669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:11:47,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:11:47,401 INFO L93 Difference]: Finished difference Result 65526 states and 83743 transitions. [2022-11-19 08:11:47,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:11:47,402 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 556.3333333333334) internal successors, (1669), 2 states have internal predecessors, (1669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1669 [2022-11-19 08:11:47,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:11:47,447 INFO L225 Difference]: With dead ends: 65526 [2022-11-19 08:11:47,447 INFO L226 Difference]: Without dead ends: 39316 [2022-11-19 08:11:47,466 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 08:11:47,466 INFO L413 NwaCegarLoop]: 816 mSDtfsCounter, 2197 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 4345 mSolverCounterSat, 2286 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2197 SdHoareTripleChecker+Valid, 826 SdHoareTripleChecker+Invalid, 6631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2286 IncrementalHoareTripleChecker+Valid, 4345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:11:47,466 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2197 Valid, 826 Invalid, 6631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2286 Valid, 4345 Invalid, 0 Unknown, 0 Unchecked, 7.0s Time] [2022-11-19 08:11:47,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39316 states. [2022-11-19 08:11:47,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39316 to 39316. [2022-11-19 08:11:47,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39316 states, 39315 states have (on average 1.2277502225613635) internal successors, (48269), 39315 states have internal predecessors, (48269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:11:47,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39316 states to 39316 states and 48269 transitions. [2022-11-19 08:11:47,877 INFO L78 Accepts]: Start accepts. Automaton has 39316 states and 48269 transitions. Word has length 1669 [2022-11-19 08:11:47,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:11:47,877 INFO L495 AbstractCegarLoop]: Abstraction has 39316 states and 48269 transitions. [2022-11-19 08:11:47,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 556.3333333333334) internal successors, (1669), 2 states have internal predecessors, (1669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:11:47,878 INFO L276 IsEmpty]: Start isEmpty. Operand 39316 states and 48269 transitions. [2022-11-19 08:11:47,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1672 [2022-11-19 08:11:47,926 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:11:47,926 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:11:47,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-11-19 08:11:47,927 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:11:47,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:11:47,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1808091835, now seen corresponding path program 1 times [2022-11-19 08:11:47,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:11:47,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915191829] [2022-11-19 08:11:47,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:11:47,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:11:48,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:11:48,910 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 08:11:48,910 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:11:48,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915191829] [2022-11-19 08:11:48,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915191829] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:11:48,911 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:11:48,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:11:48,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604042625] [2022-11-19 08:11:48,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:11:48,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:11:48,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:11:48,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:11:48,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:11:48,914 INFO L87 Difference]: Start difference. First operand 39316 states and 48269 transitions. Second operand has 3 states, 3 states have (on average 553.3333333333334) internal successors, (1660), 3 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:11:56,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:11:56,821 INFO L93 Difference]: Finished difference Result 117942 states and 144802 transitions. [2022-11-19 08:11:56,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:11:56,822 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 553.3333333333334) internal successors, (1660), 3 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1671 [2022-11-19 08:11:56,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:11:56,917 INFO L225 Difference]: With dead ends: 117942 [2022-11-19 08:11:56,917 INFO L226 Difference]: Without dead ends: 78628 [2022-11-19 08:11:56,948 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 08:11:56,949 INFO L413 NwaCegarLoop]: 866 mSDtfsCounter, 2088 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 4589 mSolverCounterSat, 2021 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2088 SdHoareTripleChecker+Valid, 876 SdHoareTripleChecker+Invalid, 6610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2021 IncrementalHoareTripleChecker+Valid, 4589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:11:56,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2088 Valid, 876 Invalid, 6610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2021 Valid, 4589 Invalid, 0 Unknown, 0 Unchecked, 7.2s Time] [2022-11-19 08:11:57,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78628 states. [2022-11-19 08:11:57,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78628 to 78628. [2022-11-19 08:11:57,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78628 states, 78627 states have (on average 1.1642692713698857) internal successors, (91543), 78627 states have internal predecessors, (91543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:11:57,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78628 states to 78628 states and 91543 transitions. [2022-11-19 08:11:57,791 INFO L78 Accepts]: Start accepts. Automaton has 78628 states and 91543 transitions. Word has length 1671 [2022-11-19 08:11:57,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:11:57,792 INFO L495 AbstractCegarLoop]: Abstraction has 78628 states and 91543 transitions. [2022-11-19 08:11:57,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 553.3333333333334) internal successors, (1660), 3 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:11:57,792 INFO L276 IsEmpty]: Start isEmpty. Operand 78628 states and 91543 transitions. [2022-11-19 08:11:57,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1681 [2022-11-19 08:11:57,866 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:11:57,866 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:11:57,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-11-19 08:11:57,867 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:11:57,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:11:57,867 INFO L85 PathProgramCache]: Analyzing trace with hash -840997854, now seen corresponding path program 1 times [2022-11-19 08:11:57,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:11:57,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45265531] [2022-11-19 08:11:57,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:11:57,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:11:58,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:11:58,934 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 08:11:58,934 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:11:58,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45265531] [2022-11-19 08:11:58,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45265531] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:11:58,934 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:11:58,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 08:11:58,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373576399] [2022-11-19 08:11:58,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:11:58,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:11:58,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:11:58,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:11:58,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:11:58,938 INFO L87 Difference]: Start difference. First operand 78628 states and 91543 transitions. Second operand has 3 states, 3 states have (on average 556.3333333333334) internal successors, (1669), 2 states have internal predecessors, (1669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:12:07,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:12:07,680 INFO L93 Difference]: Finished difference Result 196566 states and 232696 transitions. [2022-11-19 08:12:07,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:12:07,681 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 556.3333333333334) internal successors, (1669), 2 states have internal predecessors, (1669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1680 [2022-11-19 08:12:07,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:12:07,844 INFO L225 Difference]: With dead ends: 196566 [2022-11-19 08:12:07,844 INFO L226 Difference]: Without dead ends: 117940 [2022-11-19 08:12:07,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 08:12:07,891 INFO L413 NwaCegarLoop]: 922 mSDtfsCounter, 1713 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 4887 mSolverCounterSat, 2190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1713 SdHoareTripleChecker+Valid, 933 SdHoareTripleChecker+Invalid, 7077 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2190 IncrementalHoareTripleChecker+Valid, 4887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2022-11-19 08:12:07,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1713 Valid, 933 Invalid, 7077 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2190 Valid, 4887 Invalid, 0 Unknown, 0 Unchecked, 7.7s Time] [2022-11-19 08:12:07,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117940 states. [2022-11-19 08:12:09,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117940 to 117940. [2022-11-19 08:12:09,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117940 states, 117939 states have (on average 1.1671033330789646) internal successors, (137647), 117939 states have internal predecessors, (137647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:12:09,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117940 states to 117940 states and 137647 transitions. [2022-11-19 08:12:09,837 INFO L78 Accepts]: Start accepts. Automaton has 117940 states and 137647 transitions. Word has length 1680 [2022-11-19 08:12:09,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:12:09,837 INFO L495 AbstractCegarLoop]: Abstraction has 117940 states and 137647 transitions. [2022-11-19 08:12:09,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 556.3333333333334) internal successors, (1669), 2 states have internal predecessors, (1669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:12:09,838 INFO L276 IsEmpty]: Start isEmpty. Operand 117940 states and 137647 transitions. [2022-11-19 08:12:09,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1688 [2022-11-19 08:12:09,948 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:12:09,948 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:12:09,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-11-19 08:12:09,949 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:12:09,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:12:09,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1215193972, now seen corresponding path program 1 times [2022-11-19 08:12:09,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:12:09,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687626320] [2022-11-19 08:12:09,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:12:09,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:12:10,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:12:11,647 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:12:11,647 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:12:11,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687626320] [2022-11-19 08:12:11,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687626320] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:12:11,647 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:12:11,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:12:11,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190072637] [2022-11-19 08:12:11,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:12:11,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:12:11,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:12:11,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:12:11,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:12:11,651 INFO L87 Difference]: Start difference. First operand 117940 states and 137647 transitions. Second operand has 3 states, 3 states have (on average 562.3333333333334) internal successors, (1687), 3 states have internal predecessors, (1687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:12:20,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:12:20,652 INFO L93 Difference]: Finished difference Result 289932 states and 342664 transitions. [2022-11-19 08:12:20,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:12:20,652 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 562.3333333333334) internal successors, (1687), 3 states have internal predecessors, (1687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1687 [2022-11-19 08:12:20,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:12:20,895 INFO L225 Difference]: With dead ends: 289932 [2022-11-19 08:12:20,896 INFO L226 Difference]: Without dead ends: 171994 [2022-11-19 08:12:21,089 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 08:12:21,090 INFO L413 NwaCegarLoop]: 2704 mSDtfsCounter, 1849 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 4621 mSolverCounterSat, 2126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1849 SdHoareTripleChecker+Valid, 2716 SdHoareTripleChecker+Invalid, 6747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2126 IncrementalHoareTripleChecker+Valid, 4621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:12:21,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1849 Valid, 2716 Invalid, 6747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2126 Valid, 4621 Invalid, 0 Unknown, 0 Unchecked, 7.5s Time] [2022-11-19 08:12:21,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171994 states. [2022-11-19 08:12:23,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171994 to 171994. [2022-11-19 08:12:23,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171994 states, 171993 states have (on average 1.138970772066305) internal successors, (195895), 171993 states have internal predecessors, (195895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:12:23,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171994 states to 171994 states and 195895 transitions. [2022-11-19 08:12:23,658 INFO L78 Accepts]: Start accepts. Automaton has 171994 states and 195895 transitions. Word has length 1687 [2022-11-19 08:12:23,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:12:23,658 INFO L495 AbstractCegarLoop]: Abstraction has 171994 states and 195895 transitions. [2022-11-19 08:12:23,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 562.3333333333334) internal successors, (1687), 3 states have internal predecessors, (1687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:12:23,659 INFO L276 IsEmpty]: Start isEmpty. Operand 171994 states and 195895 transitions. [2022-11-19 08:12:24,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1745 [2022-11-19 08:12:24,172 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:12:24,173 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:12:24,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-11-19 08:12:24,173 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:12:24,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:12:24,174 INFO L85 PathProgramCache]: Analyzing trace with hash 136477797, now seen corresponding path program 1 times [2022-11-19 08:12:24,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:12:24,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027625413] [2022-11-19 08:12:24,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:12:24,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:12:24,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:12:25,394 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 154 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2022-11-19 08:12:25,394 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:12:25,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027625413] [2022-11-19 08:12:25,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027625413] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:12:25,395 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:12:25,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:12:25,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568958841] [2022-11-19 08:12:25,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:12:25,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:12:25,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:12:25,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:12:25,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:12:25,398 INFO L87 Difference]: Start difference. First operand 171994 states and 195895 transitions. Second operand has 3 states, 3 states have (on average 560.3333333333334) internal successors, (1681), 3 states have internal predecessors, (1681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:12:34,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:12:34,210 INFO L93 Difference]: Finished difference Result 396402 states and 451722 transitions. [2022-11-19 08:12:34,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:12:34,211 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 560.3333333333334) internal successors, (1681), 3 states have internal predecessors, (1681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1744 [2022-11-19 08:12:34,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:12:34,568 INFO L225 Difference]: With dead ends: 396402 [2022-11-19 08:12:34,568 INFO L226 Difference]: Without dead ends: 224410 [2022-11-19 08:12:34,645 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 08:12:34,645 INFO L413 NwaCegarLoop]: 3003 mSDtfsCounter, 1613 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 5478 mSolverCounterSat, 891 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1613 SdHoareTripleChecker+Valid, 3015 SdHoareTripleChecker+Invalid, 6369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 891 IncrementalHoareTripleChecker+Valid, 5478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2022-11-19 08:12:34,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1613 Valid, 3015 Invalid, 6369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [891 Valid, 5478 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2022-11-19 08:12:34,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224410 states. [2022-11-19 08:12:37,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224410 to 222772. [2022-11-19 08:12:37,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222772 states, 222771 states have (on average 1.1180674324755018) internal successors, (249073), 222771 states have internal predecessors, (249073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:12:38,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222772 states to 222772 states and 249073 transitions. [2022-11-19 08:12:38,069 INFO L78 Accepts]: Start accepts. Automaton has 222772 states and 249073 transitions. Word has length 1744 [2022-11-19 08:12:38,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:12:38,069 INFO L495 AbstractCegarLoop]: Abstraction has 222772 states and 249073 transitions. [2022-11-19 08:12:38,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 560.3333333333334) internal successors, (1681), 3 states have internal predecessors, (1681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:12:38,070 INFO L276 IsEmpty]: Start isEmpty. Operand 222772 states and 249073 transitions. [2022-11-19 08:12:38,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1756 [2022-11-19 08:12:38,303 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:12:38,303 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:12:38,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-11-19 08:12:38,304 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:12:38,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:12:38,304 INFO L85 PathProgramCache]: Analyzing trace with hash -931506451, now seen corresponding path program 1 times [2022-11-19 08:12:38,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:12:38,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943688095] [2022-11-19 08:12:38,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:12:38,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:12:39,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:12:39,662 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 156 proven. 0 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-11-19 08:12:39,662 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:12:39,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943688095] [2022-11-19 08:12:39,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943688095] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:12:39,662 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:12:39,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 08:12:39,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646603059] [2022-11-19 08:12:39,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:12:39,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:12:39,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:12:39,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:12:39,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:12:39,666 INFO L87 Difference]: Start difference. First operand 222772 states and 249073 transitions. Second operand has 3 states, 3 states have (on average 558.6666666666666) internal successors, (1676), 2 states have internal predecessors, (1676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:12:50,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:12:50,165 INFO L93 Difference]: Finished difference Result 520890 states and 580155 transitions. [2022-11-19 08:12:50,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:12:50,166 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 558.6666666666666) internal successors, (1676), 2 states have internal predecessors, (1676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1755 [2022-11-19 08:12:50,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:12:50,582 INFO L225 Difference]: With dead ends: 520890 [2022-11-19 08:12:50,582 INFO L226 Difference]: Without dead ends: 289930 [2022-11-19 08:12:50,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 08:12:50,649 INFO L413 NwaCegarLoop]: 320 mSDtfsCounter, 2754 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 4651 mSolverCounterSat, 1848 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2754 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 6499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1848 IncrementalHoareTripleChecker+Valid, 4651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2022-11-19 08:12:50,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2754 Valid, 330 Invalid, 6499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1848 Valid, 4651 Invalid, 0 Unknown, 0 Unchecked, 7.6s Time] [2022-11-19 08:12:50,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289930 states.