./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label49+token_ring.09.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b436f4-9cd0-4784-9151-83a384ccc6e6/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b436f4-9cd0-4784-9151-83a384ccc6e6/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b436f4-9cd0-4784-9151-83a384ccc6e6/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b436f4-9cd0-4784-9151-83a384ccc6e6/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label49+token_ring.09.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b436f4-9cd0-4784-9151-83a384ccc6e6/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b436f4-9cd0-4784-9151-83a384ccc6e6/bin/utaipan-gh47qXpMRh --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 9c44d114d56c1766d1cbfa8e225f5145dcce7e8e615df451e987409645be250c --- 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-2329fc7 [2022-12-14 15:03:47,545 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 15:03:47,547 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 15:03:47,566 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 15:03:47,567 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 15:03:47,568 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 15:03:47,569 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 15:03:47,571 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 15:03:47,572 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 15:03:47,573 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 15:03:47,574 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 15:03:47,575 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 15:03:47,575 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 15:03:47,576 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 15:03:47,578 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 15:03:47,579 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 15:03:47,580 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 15:03:47,580 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 15:03:47,582 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 15:03:47,584 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 15:03:47,585 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 15:03:47,586 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 15:03:47,587 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 15:03:47,588 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 15:03:47,592 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 15:03:47,592 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 15:03:47,592 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 15:03:47,593 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 15:03:47,593 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 15:03:47,594 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 15:03:47,595 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 15:03:47,596 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 15:03:47,596 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 15:03:47,597 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 15:03:47,598 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 15:03:47,598 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 15:03:47,599 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 15:03:47,599 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 15:03:47,599 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 15:03:47,600 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 15:03:47,601 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 15:03:47,601 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b436f4-9cd0-4784-9151-83a384ccc6e6/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 15:03:47,623 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 15:03:47,623 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 15:03:47,623 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 15:03:47,624 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 15:03:47,624 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 15:03:47,625 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 15:03:47,625 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 15:03:47,625 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 15:03:47,625 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 15:03:47,625 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 15:03:47,626 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 15:03:47,626 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 15:03:47,626 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 15:03:47,626 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 15:03:47,626 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 15:03:47,627 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 15:03:47,627 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 15:03:47,627 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 15:03:47,628 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 15:03:47,628 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 15:03:47,628 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 15:03:47,628 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 15:03:47,628 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 15:03:47,629 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 15:03:47,629 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 15:03:47,629 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 15:03:47,629 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 15:03:47,629 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 15:03:47,629 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 15:03:47,630 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 15:03:47,630 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 15:03:47,630 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 15:03:47,630 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 15:03:47,631 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 15:03:47,631 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 15:03:47,631 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 15:03:47,631 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 15:03:47,631 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 15:03:47,631 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 15:03:47,632 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 15:03:47,632 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 15:03:47,632 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_59b436f4-9cd0-4784-9151-83a384ccc6e6/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b436f4-9cd0-4784-9151-83a384ccc6e6/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9c44d114d56c1766d1cbfa8e225f5145dcce7e8e615df451e987409645be250c [2022-12-14 15:03:47,834 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 15:03:47,850 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 15:03:47,852 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 15:03:47,853 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 15:03:47,854 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 15:03:47,854 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b436f4-9cd0-4784-9151-83a384ccc6e6/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/combinations/Problem05_label49+token_ring.09.cil-1.c [2022-12-14 15:03:50,366 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 15:03:50,777 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 15:03:50,777 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b436f4-9cd0-4784-9151-83a384ccc6e6/sv-benchmarks/c/combinations/Problem05_label49+token_ring.09.cil-1.c [2022-12-14 15:03:50,811 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b436f4-9cd0-4784-9151-83a384ccc6e6/bin/utaipan-gh47qXpMRh/data/d578c07ae/7eb536590e2647d1b77b717cfe8608f8/FLAG404288ab1 [2022-12-14 15:03:50,941 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b436f4-9cd0-4784-9151-83a384ccc6e6/bin/utaipan-gh47qXpMRh/data/d578c07ae/7eb536590e2647d1b77b717cfe8608f8 [2022-12-14 15:03:50,943 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 15:03:50,944 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 15:03:50,945 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 15:03:50,945 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 15:03:50,948 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 15:03:50,948 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:03:50" (1/1) ... [2022-12-14 15:03:50,949 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b10286e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:03:50, skipping insertion in model container [2022-12-14 15:03:50,949 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:03:50" (1/1) ... [2022-12-14 15:03:50,955 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 15:03:51,135 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 15:03:52,564 WARN L237 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_59b436f4-9cd0-4784-9151-83a384ccc6e6/sv-benchmarks/c/combinations/Problem05_label49+token_ring.09.cil-1.c[380593,380606] [2022-12-14 15:03:52,583 WARN L237 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_59b436f4-9cd0-4784-9151-83a384ccc6e6/sv-benchmarks/c/combinations/Problem05_label49+token_ring.09.cil-1.c[383339,383352] [2022-12-14 15:03:52,773 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 15:03:52,783 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 15:03:53,635 WARN L237 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_59b436f4-9cd0-4784-9151-83a384ccc6e6/sv-benchmarks/c/combinations/Problem05_label49+token_ring.09.cil-1.c[380593,380606] [2022-12-14 15:03:53,645 WARN L237 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_59b436f4-9cd0-4784-9151-83a384ccc6e6/sv-benchmarks/c/combinations/Problem05_label49+token_ring.09.cil-1.c[383339,383352] [2022-12-14 15:03:53,661 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 15:03:53,702 INFO L208 MainTranslator]: Completed translation [2022-12-14 15:03:53,702 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:03:53 WrapperNode [2022-12-14 15:03:53,702 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 15:03:53,703 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 15:03:53,703 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 15:03:53,703 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 15:03:53,708 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:03:53" (1/1) ... [2022-12-14 15:03:53,773 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:03:53" (1/1) ... [2022-12-14 15:03:54,106 INFO L138 Inliner]: procedures = 62, calls = 68, calls flagged for inlining = 40, calls inlined = 40, statements flattened = 13025 [2022-12-14 15:03:54,106 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 15:03:54,107 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 15:03:54,107 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 15:03:54,107 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 15:03:54,114 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:03:53" (1/1) ... [2022-12-14 15:03:54,115 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:03:53" (1/1) ... [2022-12-14 15:03:54,153 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:03:53" (1/1) ... [2022-12-14 15:03:54,154 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:03:53" (1/1) ... [2022-12-14 15:03:54,324 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:03:53" (1/1) ... [2022-12-14 15:03:54,354 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:03:53" (1/1) ... [2022-12-14 15:03:54,389 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:03:53" (1/1) ... [2022-12-14 15:03:54,400 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:03:53" (1/1) ... [2022-12-14 15:03:54,472 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 15:03:54,473 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 15:03:54,474 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 15:03:54,474 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 15:03:54,474 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:03:53" (1/1) ... [2022-12-14 15:03:54,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 15:03:54,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b436f4-9cd0-4784-9151-83a384ccc6e6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:03:54,502 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b436f4-9cd0-4784-9151-83a384ccc6e6/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 15:03:54,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b436f4-9cd0-4784-9151-83a384ccc6e6/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 15:03:54,536 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 15:03:54,536 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-12-14 15:03:54,536 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-12-14 15:03:54,536 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-12-14 15:03:54,536 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-12-14 15:03:54,536 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-12-14 15:03:54,537 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-12-14 15:03:54,537 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-12-14 15:03:54,537 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-12-14 15:03:54,537 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-12-14 15:03:54,537 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-12-14 15:03:54,537 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-12-14 15:03:54,537 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-12-14 15:03:54,537 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 15:03:54,537 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 15:03:54,538 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 15:03:54,653 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 15:03:54,655 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 15:04:01,079 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 15:04:02,512 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 15:04:02,513 INFO L300 CfgBuilder]: Removed 13 assume(true) statements. [2022-12-14 15:04:02,517 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:04:02 BoogieIcfgContainer [2022-12-14 15:04:02,518 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 15:04:02,520 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 15:04:02,520 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 15:04:02,523 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 15:04:02,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 03:03:50" (1/3) ... [2022-12-14 15:04:02,524 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e6b328c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:04:02, skipping insertion in model container [2022-12-14 15:04:02,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:03:53" (2/3) ... [2022-12-14 15:04:02,525 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e6b328c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:04:02, skipping insertion in model container [2022-12-14 15:04:02,525 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:04:02" (3/3) ... [2022-12-14 15:04:02,526 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label49+token_ring.09.cil-1.c [2022-12-14 15:04:02,543 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 15:04:02,543 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-12-14 15:04:02,627 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 15:04:02,634 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;@3721e23, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 15:04:02,634 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-14 15:04:02,644 INFO L276 IsEmpty]: Start isEmpty. Operand has 1798 states, 1766 states have (on average 1.962061155152888) internal successors, (3465), 1769 states have internal predecessors, (3465), 23 states have call successors, (23), 6 states have call predecessors, (23), 6 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-12-14 15:04:02,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-12-14 15:04:02,652 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:04:02,653 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] [2022-12-14 15:04:02,653 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:04:02,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:04:02,659 INFO L85 PathProgramCache]: Analyzing trace with hash -559832689, now seen corresponding path program 1 times [2022-12-14 15:04:02,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:04:02,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702361238] [2022-12-14 15:04:02,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:04:02,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:04:02,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:04:02,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:04:02,943 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:04:02,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702361238] [2022-12-14 15:04:02,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702361238] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:04:02,944 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:04:02,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 15:04:02,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647779464] [2022-12-14 15:04:02,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:04:02,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 15:04:02,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:04:02,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 15:04:02,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 15:04:02,979 INFO L87 Difference]: Start difference. First operand has 1798 states, 1766 states have (on average 1.962061155152888) internal successors, (3465), 1769 states have internal predecessors, (3465), 23 states have call successors, (23), 6 states have call predecessors, (23), 6 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 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) [2022-12-14 15:04:03,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:04:03,719 INFO L93 Difference]: Finished difference Result 3734 states and 7259 transitions. [2022-12-14 15:04:03,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 15:04:03,721 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 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 58 [2022-12-14 15:04:03,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:04:03,747 INFO L225 Difference]: With dead ends: 3734 [2022-12-14 15:04:03,747 INFO L226 Difference]: Without dead ends: 1935 [2022-12-14 15:04:03,756 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 [2022-12-14 15:04:03,760 INFO L413 NwaCegarLoop]: 3421 mSDtfsCounter, 3680 mSDsluCounter, 3335 mSDsCounter, 0 mSdLazyCounter, 678 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3680 SdHoareTripleChecker+Valid, 6756 SdHoareTripleChecker+Invalid, 692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 15:04:03,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3680 Valid, 6756 Invalid, 692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 678 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 15:04:03,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1935 states. [2022-12-14 15:04:03,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1935 to 1934. [2022-12-14 15:04:03,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1934 states, 1878 states have (on average 1.9297124600638977) internal successors, (3624), 1881 states have internal predecessors, (3624), 42 states have call successors, (42), 12 states have call predecessors, (42), 12 states have return successors, (42), 41 states have call predecessors, (42), 42 states have call successors, (42) [2022-12-14 15:04:03,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1934 states to 1934 states and 3708 transitions. [2022-12-14 15:04:03,896 INFO L78 Accepts]: Start accepts. Automaton has 1934 states and 3708 transitions. Word has length 58 [2022-12-14 15:04:03,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:04:03,897 INFO L495 AbstractCegarLoop]: Abstraction has 1934 states and 3708 transitions. [2022-12-14 15:04:03,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 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) [2022-12-14 15:04:03,897 INFO L276 IsEmpty]: Start isEmpty. Operand 1934 states and 3708 transitions. [2022-12-14 15:04:03,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-12-14 15:04:03,907 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:04:03,908 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:04:03,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 15:04:03,908 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:04:03,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:04:03,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1325155045, now seen corresponding path program 1 times [2022-12-14 15:04:03,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:04:03,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753813011] [2022-12-14 15:04:03,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:04:03,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:04:03,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:04:04,115 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 15:04:04,115 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:04:04,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753813011] [2022-12-14 15:04:04,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753813011] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:04:04,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279653403] [2022-12-14 15:04:04,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:04:04,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:04:04,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b436f4-9cd0-4784-9151-83a384ccc6e6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:04:04,118 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b436f4-9cd0-4784-9151-83a384ccc6e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:04:04,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b436f4-9cd0-4784-9151-83a384ccc6e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 15:04:04,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:04:04,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 840 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 15:04:04,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:04:04,322 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 15:04:04,322 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:04:04,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279653403] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:04:04,322 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:04:04,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 15:04:04,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446618891] [2022-12-14 15:04:04,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:04:04,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:04:04,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:04:04,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:04:04,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 15:04:04,326 INFO L87 Difference]: Start difference. First operand 1934 states and 3708 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 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) [2022-12-14 15:04:04,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:04:04,711 INFO L93 Difference]: Finished difference Result 2503 states and 4585 transitions. [2022-12-14 15:04:04,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:04:04,711 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 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 115 [2022-12-14 15:04:04,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:04:04,719 INFO L225 Difference]: With dead ends: 2503 [2022-12-14 15:04:04,719 INFO L226 Difference]: Without dead ends: 2215 [2022-12-14 15:04:04,721 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 15:04:04,722 INFO L413 NwaCegarLoop]: 3292 mSDtfsCounter, 3453 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3453 SdHoareTripleChecker+Valid, 3472 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 15:04:04,722 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3453 Valid, 3472 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 15:04:04,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2215 states. [2022-12-14 15:04:04,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2215 to 2211. [2022-12-14 15:04:04,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2211 states, 2107 states have (on average 1.8818224964404366) internal successors, (3965), 2111 states have internal predecessors, (3965), 78 states have call successors, (78), 24 states have call predecessors, (78), 24 states have return successors, (78), 76 states have call predecessors, (78), 78 states have call successors, (78) [2022-12-14 15:04:04,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2211 states to 2211 states and 4121 transitions. [2022-12-14 15:04:04,771 INFO L78 Accepts]: Start accepts. Automaton has 2211 states and 4121 transitions. Word has length 115 [2022-12-14 15:04:04,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:04:04,772 INFO L495 AbstractCegarLoop]: Abstraction has 2211 states and 4121 transitions. [2022-12-14 15:04:04,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 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) [2022-12-14 15:04:04,772 INFO L276 IsEmpty]: Start isEmpty. Operand 2211 states and 4121 transitions. [2022-12-14 15:04:04,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-12-14 15:04:04,774 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:04:04,774 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:04:04,781 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b436f4-9cd0-4784-9151-83a384ccc6e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 15:04:04,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b436f4-9cd0-4784-9151-83a384ccc6e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:04:04,975 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:04:04,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:04:04,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1488833433, now seen corresponding path program 1 times [2022-12-14 15:04:04,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:04:04,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895781098] [2022-12-14 15:04:04,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:04:04,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:04:05,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:04:05,174 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 15:04:05,174 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:04:05,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895781098] [2022-12-14 15:04:05,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895781098] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:04:05,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621137539] [2022-12-14 15:04:05,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:04:05,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:04:05,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b436f4-9cd0-4784-9151-83a384ccc6e6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:04:05,176 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b436f4-9cd0-4784-9151-83a384ccc6e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:04:05,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b436f4-9cd0-4784-9151-83a384ccc6e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 15:04:05,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:04:05,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 834 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 15:04:05,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:04:05,385 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 15:04:05,385 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:04:05,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621137539] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:04:05,385 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:04:05,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 15:04:05,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306601516] [2022-12-14 15:04:05,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:04:05,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:04:05,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:04:05,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:04:05,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 15:04:05,387 INFO L87 Difference]: Start difference. First operand 2211 states and 4121 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 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) [2022-12-14 15:04:05,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:04:05,784 INFO L93 Difference]: Finished difference Result 3328 states and 5836 transitions. [2022-12-14 15:04:05,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:04:05,785 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 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 115 [2022-12-14 15:04:05,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:04:05,797 INFO L225 Difference]: With dead ends: 3328 [2022-12-14 15:04:05,797 INFO L226 Difference]: Without dead ends: 2763 [2022-12-14 15:04:05,800 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 15:04:05,801 INFO L413 NwaCegarLoop]: 3291 mSDtfsCounter, 3465 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3465 SdHoareTripleChecker+Valid, 3471 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 15:04:05,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3465 Valid, 3471 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 15:04:05,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2763 states. [2022-12-14 15:04:05,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2763 to 2757. [2022-12-14 15:04:05,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2757 states, 2559 states have (on average 1.8112543962485346) internal successors, (4635), 2565 states have internal predecessors, (4635), 148 states have call successors, (148), 48 states have call predecessors, (148), 48 states have return successors, (148), 144 states have call predecessors, (148), 148 states have call successors, (148) [2022-12-14 15:04:05,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2757 states to 2757 states and 4931 transitions. [2022-12-14 15:04:05,900 INFO L78 Accepts]: Start accepts. Automaton has 2757 states and 4931 transitions. Word has length 115 [2022-12-14 15:04:05,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:04:05,901 INFO L495 AbstractCegarLoop]: Abstraction has 2757 states and 4931 transitions. [2022-12-14 15:04:05,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 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) [2022-12-14 15:04:05,901 INFO L276 IsEmpty]: Start isEmpty. Operand 2757 states and 4931 transitions. [2022-12-14 15:04:05,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-12-14 15:04:05,905 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:04:05,905 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:04:05,911 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b436f4-9cd0-4784-9151-83a384ccc6e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 15:04:06,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b436f4-9cd0-4784-9151-83a384ccc6e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:04:06,106 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:04:06,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:04:06,106 INFO L85 PathProgramCache]: Analyzing trace with hash 934277865, now seen corresponding path program 1 times [2022-12-14 15:04:06,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:04:06,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188417401] [2022-12-14 15:04:06,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:04:06,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:04:06,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:04:06,251 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 15:04:06,251 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:04:06,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188417401] [2022-12-14 15:04:06,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188417401] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:04:06,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749857103] [2022-12-14 15:04:06,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:04:06,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:04:06,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b436f4-9cd0-4784-9151-83a384ccc6e6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:04:06,253 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b436f4-9cd0-4784-9151-83a384ccc6e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:04:06,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b436f4-9cd0-4784-9151-83a384ccc6e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 15:04:06,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:04:06,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 828 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 15:04:06,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:04:06,439 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 15:04:06,439 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:04:06,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749857103] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:04:06,439 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:04:06,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 15:04:06,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490926117] [2022-12-14 15:04:06,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:04:06,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:04:06,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:04:06,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:04:06,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 15:04:06,442 INFO L87 Difference]: Start difference. First operand 2757 states and 4931 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 2 states have internal predecessors, (70), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 15:04:06,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:04:06,860 INFO L93 Difference]: Finished difference Result 4954 states and 8288 transitions. [2022-12-14 15:04:06,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:04:06,861 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 2 states have internal predecessors, (70), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 115 [2022-12-14 15:04:06,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:04:06,873 INFO L225 Difference]: With dead ends: 4954 [2022-12-14 15:04:06,873 INFO L226 Difference]: Without dead ends: 3843 [2022-12-14 15:04:06,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 15:04:06,878 INFO L413 NwaCegarLoop]: 3290 mSDtfsCounter, 3474 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3474 SdHoareTripleChecker+Valid, 3470 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 15:04:06,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3474 Valid, 3470 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 15:04:06,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3843 states. [2022-12-14 15:04:06,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3843 to 3833. [2022-12-14 15:04:06,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3833 states, 3451 states have (on average 1.724427702115329) internal successors, (5951), 3461 states have internal predecessors, (5951), 284 states have call successors, (284), 96 states have call predecessors, (284), 96 states have return successors, (284), 276 states have call predecessors, (284), 284 states have call successors, (284) [2022-12-14 15:04:06,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3833 states to 3833 states and 6519 transitions. [2022-12-14 15:04:06,971 INFO L78 Accepts]: Start accepts. Automaton has 3833 states and 6519 transitions. Word has length 115 [2022-12-14 15:04:06,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:04:06,971 INFO L495 AbstractCegarLoop]: Abstraction has 3833 states and 6519 transitions. [2022-12-14 15:04:06,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 2 states have internal predecessors, (70), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 15:04:06,971 INFO L276 IsEmpty]: Start isEmpty. Operand 3833 states and 6519 transitions. [2022-12-14 15:04:06,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-12-14 15:04:06,975 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:04:06,975 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:04:06,981 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b436f4-9cd0-4784-9151-83a384ccc6e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 15:04:07,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b436f4-9cd0-4784-9151-83a384ccc6e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:04:07,175 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:04:07,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:04:07,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1629709991, now seen corresponding path program 1 times [2022-12-14 15:04:07,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:04:07,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123510090] [2022-12-14 15:04:07,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:04:07,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:04:07,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:04:07,261 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 15:04:07,261 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:04:07,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123510090] [2022-12-14 15:04:07,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123510090] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:04:07,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850033607] [2022-12-14 15:04:07,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:04:07,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:04:07,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b436f4-9cd0-4784-9151-83a384ccc6e6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:04:07,262 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b436f4-9cd0-4784-9151-83a384ccc6e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:04:07,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b436f4-9cd0-4784-9151-83a384ccc6e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 15:04:07,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:04:07,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 822 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 15:04:07,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:04:07,441 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 15:04:07,442 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:04:07,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850033607] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:04:07,442 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:04:07,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 15:04:07,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888624070] [2022-12-14 15:04:07,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:04:07,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:04:07,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:04:07,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:04:07,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 15:04:07,444 INFO L87 Difference]: Start difference. First operand 3833 states and 6519 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 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) [2022-12-14 15:04:07,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:04:07,887 INFO L93 Difference]: Finished difference Result 8158 states and 13092 transitions. [2022-12-14 15:04:07,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:04:07,888 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 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 115 [2022-12-14 15:04:07,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:04:07,931 INFO L225 Difference]: With dead ends: 8158 [2022-12-14 15:04:07,931 INFO L226 Difference]: Without dead ends: 5971 [2022-12-14 15:04:07,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 15:04:07,974 INFO L413 NwaCegarLoop]: 3262 mSDtfsCounter, 3471 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3471 SdHoareTripleChecker+Valid, 3442 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 15:04:07,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3471 Valid, 3442 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 15:04:07,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5971 states. [2022-12-14 15:04:08,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5971 to 5953. [2022-12-14 15:04:08,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5953 states, 5211 states have (on average 1.637881404720783) internal successors, (8535), 5229 states have internal predecessors, (8535), 548 states have call successors, (548), 192 states have call predecessors, (548), 192 states have return successors, (548), 532 states have call predecessors, (548), 548 states have call successors, (548) [2022-12-14 15:04:08,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5953 states to 5953 states and 9631 transitions. [2022-12-14 15:04:08,145 INFO L78 Accepts]: Start accepts. Automaton has 5953 states and 9631 transitions. Word has length 115 [2022-12-14 15:04:08,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:04:08,146 INFO L495 AbstractCegarLoop]: Abstraction has 5953 states and 9631 transitions. [2022-12-14 15:04:08,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 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) [2022-12-14 15:04:08,146 INFO L276 IsEmpty]: Start isEmpty. Operand 5953 states and 9631 transitions. [2022-12-14 15:04:08,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-12-14 15:04:08,151 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:04:08,151 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:04:08,158 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b436f4-9cd0-4784-9151-83a384ccc6e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 15:04:08,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b436f4-9cd0-4784-9151-83a384ccc6e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:04:08,352 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:04:08,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:04:08,352 INFO L85 PathProgramCache]: Analyzing trace with hash -390808663, now seen corresponding path program 1 times [2022-12-14 15:04:08,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:04:08,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909122755] [2022-12-14 15:04:08,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:04:08,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:04:08,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:04:08,440 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 15:04:08,440 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:04:08,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909122755] [2022-12-14 15:04:08,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909122755] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:04:08,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167741563] [2022-12-14 15:04:08,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:04:08,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:04:08,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b436f4-9cd0-4784-9151-83a384ccc6e6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:04:08,441 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b436f4-9cd0-4784-9151-83a384ccc6e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:04:08,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b436f4-9cd0-4784-9151-83a384ccc6e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 15:04:08,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:04:08,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 816 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 15:04:08,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:04:08,618 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 15:04:08,618 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:04:08,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167741563] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:04:08,618 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:04:08,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 15:04:08,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287482646] [2022-12-14 15:04:08,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:04:08,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:04:08,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:04:08,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:04:08,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 15:04:08,620 INFO L87 Difference]: Start difference. First operand 5953 states and 9631 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 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) [2022-12-14 15:04:09,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:04:09,168 INFO L93 Difference]: Finished difference Result 14470 states and 22500 transitions. [2022-12-14 15:04:09,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:04:09,168 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 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 115 [2022-12-14 15:04:09,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:04:09,201 INFO L225 Difference]: With dead ends: 14470 [2022-12-14 15:04:09,201 INFO L226 Difference]: Without dead ends: 10163 [2022-12-14 15:04:09,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 15:04:09,215 INFO L413 NwaCegarLoop]: 3262 mSDtfsCounter, 3459 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3459 SdHoareTripleChecker+Valid, 3442 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 15:04:09,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3459 Valid, 3442 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 15:04:09,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10163 states. [2022-12-14 15:04:09,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10163 to 10129. [2022-12-14 15:04:09,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10129 states, 8683 states have (on average 1.5670851088333526) internal successors, (13607), 8717 states have internal predecessors, (13607), 1060 states have call successors, (1060), 384 states have call predecessors, (1060), 384 states have return successors, (1060), 1028 states have call predecessors, (1060), 1060 states have call successors, (1060) [2022-12-14 15:04:09,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10129 states to 10129 states and 15727 transitions. [2022-12-14 15:04:09,526 INFO L78 Accepts]: Start accepts. Automaton has 10129 states and 15727 transitions. Word has length 115 [2022-12-14 15:04:09,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:04:09,527 INFO L495 AbstractCegarLoop]: Abstraction has 10129 states and 15727 transitions. [2022-12-14 15:04:09,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 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) [2022-12-14 15:04:09,528 INFO L276 IsEmpty]: Start isEmpty. Operand 10129 states and 15727 transitions. [2022-12-14 15:04:09,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-12-14 15:04:09,536 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:04:09,537 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:04:09,542 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b436f4-9cd0-4784-9151-83a384ccc6e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 15:04:09,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b436f4-9cd0-4784-9151-83a384ccc6e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:04:09,737 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:04:09,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:04:09,738 INFO L85 PathProgramCache]: Analyzing trace with hash -739507285, now seen corresponding path program 1 times [2022-12-14 15:04:09,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:04:09,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525425520] [2022-12-14 15:04:09,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:04:09,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:04:09,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:04:09,809 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-12-14 15:04:09,809 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:04:09,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525425520] [2022-12-14 15:04:09,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525425520] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:04:09,809 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:04:09,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:04:09,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021177728] [2022-12-14 15:04:09,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:04:09,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:04:09,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:04:09,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:04:09,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:04:09,811 INFO L87 Difference]: Start difference. First operand 10129 states and 15727 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 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) [2022-12-14 15:04:10,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:04:10,392 INFO L93 Difference]: Finished difference Result 16723 states and 25776 transitions. [2022-12-14 15:04:10,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:04:10,392 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 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 115 [2022-12-14 15:04:10,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:04:10,436 INFO L225 Difference]: With dead ends: 16723 [2022-12-14 15:04:10,436 INFO L226 Difference]: Without dead ends: 12401 [2022-12-14 15:04:10,453 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 [2022-12-14 15:04:10,453 INFO L413 NwaCegarLoop]: 3348 mSDtfsCounter, 100 mSDsluCounter, 3254 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 6602 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 15:04:10,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 6602 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 528 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 15:04:10,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12401 states. [2022-12-14 15:04:10,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12401 to 11713. [2022-12-14 15:04:10,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11713 states, 10203 states have (on average 1.5908066255023032) internal successors, (16231), 10237 states have internal predecessors, (16231), 1092 states have call successors, (1092), 416 states have call predecessors, (1092), 416 states have return successors, (1092), 1060 states have call predecessors, (1092), 1092 states have call successors, (1092) [2022-12-14 15:04:10,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11713 states to 11713 states and 18415 transitions. [2022-12-14 15:04:10,952 INFO L78 Accepts]: Start accepts. Automaton has 11713 states and 18415 transitions. Word has length 115 [2022-12-14 15:04:10,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:04:10,953 INFO L495 AbstractCegarLoop]: Abstraction has 11713 states and 18415 transitions. [2022-12-14 15:04:10,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 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) [2022-12-14 15:04:10,953 INFO L276 IsEmpty]: Start isEmpty. Operand 11713 states and 18415 transitions. [2022-12-14 15:04:10,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-12-14 15:04:10,976 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:04:10,976 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-12-14 15:04:10,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 15:04:10,977 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:04:10,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:04:10,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1704282367, now seen corresponding path program 1 times [2022-12-14 15:04:10,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:04:10,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138545295] [2022-12-14 15:04:10,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:04:10,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:04:11,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:04:11,048 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-12-14 15:04:11,049 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:04:11,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138545295] [2022-12-14 15:04:11,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138545295] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:04:11,049 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:04:11,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:04:11,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463666904] [2022-12-14 15:04:11,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:04:11,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:04:11,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:04:11,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:04:11,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:04:11,050 INFO L87 Difference]: Start difference. First operand 11713 states and 18415 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, (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) [2022-12-14 15:04:11,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:04:11,755 INFO L93 Difference]: Finished difference Result 31558 states and 48788 transitions. [2022-12-14 15:04:11,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:04:11,755 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, (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 156 [2022-12-14 15:04:11,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:04:11,799 INFO L225 Difference]: With dead ends: 31558 [2022-12-14 15:04:11,799 INFO L226 Difference]: Without dead ends: 21491 [2022-12-14 15:04:11,816 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 [2022-12-14 15:04:11,817 INFO L413 NwaCegarLoop]: 3264 mSDtfsCounter, 3461 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3461 SdHoareTripleChecker+Valid, 3444 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 15:04:11,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3461 Valid, 3444 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 15:04:11,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21491 states. [2022-12-14 15:04:12,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21491 to 21393. [2022-12-14 15:04:12,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21393 states, 18443 states have (on average 1.5480670172965352) internal successors, (28551), 18509 states have internal predecessors, (28551), 2116 states have call successors, (2116), 832 states have call predecessors, (2116), 832 states have return successors, (2116), 2052 states have call predecessors, (2116), 2116 states have call successors, (2116) [2022-12-14 15:04:12,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21393 states to 21393 states and 32783 transitions. [2022-12-14 15:04:12,341 INFO L78 Accepts]: Start accepts. Automaton has 21393 states and 32783 transitions. Word has length 156 [2022-12-14 15:04:12,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:04:12,342 INFO L495 AbstractCegarLoop]: Abstraction has 21393 states and 32783 transitions. [2022-12-14 15:04:12,342 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, (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) [2022-12-14 15:04:12,342 INFO L276 IsEmpty]: Start isEmpty. Operand 21393 states and 32783 transitions. [2022-12-14 15:04:12,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-12-14 15:04:12,372 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:04:12,372 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-12-14 15:04:12,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 15:04:12,372 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:04:12,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:04:12,372 INFO L85 PathProgramCache]: Analyzing trace with hash 56494711, now seen corresponding path program 1 times [2022-12-14 15:04:12,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:04:12,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773039597] [2022-12-14 15:04:12,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:04:12,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:04:12,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:04:12,468 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-12-14 15:04:12,468 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:04:12,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773039597] [2022-12-14 15:04:12,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773039597] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:04:12,468 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:04:12,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:04:12,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477525091] [2022-12-14 15:04:12,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:04:12,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:04:12,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:04:12,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:04:12,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:04:12,469 INFO L87 Difference]: Start difference. First operand 21393 states and 32783 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, (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) [2022-12-14 15:04:13,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:04:13,604 INFO L93 Difference]: Finished difference Result 60310 states and 91924 transitions. [2022-12-14 15:04:13,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:04:13,604 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, (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 156 [2022-12-14 15:04:13,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:04:13,684 INFO L225 Difference]: With dead ends: 60310 [2022-12-14 15:04:13,684 INFO L226 Difference]: Without dead ends: 40563 [2022-12-14 15:04:13,721 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 [2022-12-14 15:04:13,721 INFO L413 NwaCegarLoop]: 3264 mSDtfsCounter, 3463 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3463 SdHoareTripleChecker+Valid, 3444 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 15:04:13,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3463 Valid, 3444 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 15:04:13,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40563 states. [2022-12-14 15:04:14,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40563 to 40369. [2022-12-14 15:04:14,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40369 states, 34603 states have (on average 1.5186833511545241) internal successors, (52551), 34733 states have internal predecessors, (52551), 4100 states have call successors, (4100), 1664 states have call predecessors, (4100), 1664 states have return successors, (4100), 3972 states have call predecessors, (4100), 4100 states have call successors, (4100) [2022-12-14 15:04:14,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40369 states to 40369 states and 60751 transitions. [2022-12-14 15:04:14,924 INFO L78 Accepts]: Start accepts. Automaton has 40369 states and 60751 transitions. Word has length 156 [2022-12-14 15:04:14,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:04:14,924 INFO L495 AbstractCegarLoop]: Abstraction has 40369 states and 60751 transitions. [2022-12-14 15:04:14,924 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, (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) [2022-12-14 15:04:14,924 INFO L276 IsEmpty]: Start isEmpty. Operand 40369 states and 60751 transitions. [2022-12-14 15:04:14,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-12-14 15:04:14,972 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:04:14,972 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-12-14 15:04:14,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 15:04:14,972 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:04:14,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:04:14,973 INFO L85 PathProgramCache]: Analyzing trace with hash -958125018, now seen corresponding path program 1 times [2022-12-14 15:04:14,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:04:14,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404019365] [2022-12-14 15:04:14,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:04:14,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:04:14,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:04:15,033 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-12-14 15:04:15,033 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:04:15,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404019365] [2022-12-14 15:04:15,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404019365] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:04:15,034 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:04:15,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:04:15,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744412054] [2022-12-14 15:04:15,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:04:15,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:04:15,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:04:15,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:04:15,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:04:15,035 INFO L87 Difference]: Start difference. First operand 40369 states and 60751 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, (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) [2022-12-14 15:04:17,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:04:17,103 INFO L93 Difference]: Finished difference Result 116662 states and 175828 transitions. [2022-12-14 15:04:17,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:04:17,104 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, (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 156 [2022-12-14 15:04:17,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:04:17,310 INFO L225 Difference]: With dead ends: 116662 [2022-12-14 15:04:17,310 INFO L226 Difference]: Without dead ends: 77939 [2022-12-14 15:04:17,385 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 [2022-12-14 15:04:17,386 INFO L413 NwaCegarLoop]: 3264 mSDtfsCounter, 3465 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3465 SdHoareTripleChecker+Valid, 3444 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 15:04:17,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3465 Valid, 3444 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 15:04:17,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77939 states. [2022-12-14 15:04:19,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77939 to 77553. [2022-12-14 15:04:19,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77553 states, 66283 states have (on average 1.4976841724122325) internal successors, (99271), 66541 states have internal predecessors, (99271), 7940 states have call successors, (7940), 3328 states have call predecessors, (7940), 3328 states have return successors, (7940), 7684 states have call predecessors, (7940), 7940 states have call successors, (7940) [2022-12-14 15:04:19,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77553 states to 77553 states and 115151 transitions. [2022-12-14 15:04:19,657 INFO L78 Accepts]: Start accepts. Automaton has 77553 states and 115151 transitions. Word has length 156 [2022-12-14 15:04:19,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:04:19,657 INFO L495 AbstractCegarLoop]: Abstraction has 77553 states and 115151 transitions. [2022-12-14 15:04:19,658 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, (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) [2022-12-14 15:04:19,658 INFO L276 IsEmpty]: Start isEmpty. Operand 77553 states and 115151 transitions. [2022-12-14 15:04:19,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-12-14 15:04:19,759 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:04:19,760 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-12-14 15:04:19,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 15:04:19,760 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:04:19,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:04:19,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1911441904, now seen corresponding path program 1 times [2022-12-14 15:04:19,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:04:19,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444957817] [2022-12-14 15:04:19,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:04:19,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:04:19,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:04:19,821 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-12-14 15:04:19,821 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:04:19,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444957817] [2022-12-14 15:04:19,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444957817] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:04:19,821 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:04:19,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:04:19,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126274849] [2022-12-14 15:04:19,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:04:19,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:04:19,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:04:19,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:04:19,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:04:19,823 INFO L87 Difference]: Start difference. First operand 77553 states and 115151 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, (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) [2022-12-14 15:04:24,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:04:24,267 INFO L93 Difference]: Finished difference Result 227062 states and 338900 transitions. [2022-12-14 15:04:24,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:04:24,268 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, (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 156 [2022-12-14 15:04:24,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:04:24,631 INFO L225 Difference]: With dead ends: 227062 [2022-12-14 15:04:24,631 INFO L226 Difference]: Without dead ends: 151155 [2022-12-14 15:04:24,757 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 [2022-12-14 15:04:24,758 INFO L413 NwaCegarLoop]: 3272 mSDtfsCounter, 3468 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3468 SdHoareTripleChecker+Valid, 3452 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 15:04:24,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3468 Valid, 3452 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 15:04:24,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151155 states. [2022-12-14 15:04:29,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151155 to 150385. [2022-12-14 15:04:29,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150385 states, 128363 states have (on average 1.4813536611017193) internal successors, (190151), 128877 states have internal predecessors, (190151), 15364 states have call successors, (15364), 6656 states have call predecessors, (15364), 6656 states have return successors, (15364), 14852 states have call predecessors, (15364), 15364 states have call successors, (15364) [2022-12-14 15:04:30,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150385 states to 150385 states and 220879 transitions. [2022-12-14 15:04:30,072 INFO L78 Accepts]: Start accepts. Automaton has 150385 states and 220879 transitions. Word has length 156 [2022-12-14 15:04:30,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:04:30,072 INFO L495 AbstractCegarLoop]: Abstraction has 150385 states and 220879 transitions. [2022-12-14 15:04:30,072 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, (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) [2022-12-14 15:04:30,073 INFO L276 IsEmpty]: Start isEmpty. Operand 150385 states and 220879 transitions. [2022-12-14 15:04:30,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-12-14 15:04:30,334 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:04:30,334 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-12-14 15:04:30,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 15:04:30,334 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:04:30,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:04:30,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1490581103, now seen corresponding path program 1 times [2022-12-14 15:04:30,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:04:30,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970128484] [2022-12-14 15:04:30,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:04:30,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:04:30,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:04:30,718 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 15 proven. 63 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-12-14 15:04:30,718 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:04:30,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970128484] [2022-12-14 15:04:30,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970128484] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:04:30,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555165720] [2022-12-14 15:04:30,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:04:30,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:04:30,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b436f4-9cd0-4784-9151-83a384ccc6e6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:04:30,720 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b436f4-9cd0-4784-9151-83a384ccc6e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:04:30,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b436f4-9cd0-4784-9151-83a384ccc6e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 15:04:30,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:04:30,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 1075 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 15:04:30,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:04:30,911 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 15:04:30,911 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:04:30,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555165720] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:04:30,911 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:04:30,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 15:04:30,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662984036] [2022-12-14 15:04:30,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:04:30,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:04:30,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:04:30,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:04:30,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:04:30,913 INFO L87 Difference]: Start difference. First operand 150385 states and 220879 transitions. Second operand has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 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) [2022-12-14 15:04:36,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:04:36,850 INFO L93 Difference]: Finished difference Result 286581 states and 424401 transitions. [2022-12-14 15:04:36,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:04:36,850 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 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 178 [2022-12-14 15:04:36,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:04:37,428 INFO L225 Difference]: With dead ends: 286581 [2022-12-14 15:04:37,428 INFO L226 Difference]: Without dead ends: 211059 [2022-12-14 15:04:37,658 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:04:37,659 INFO L413 NwaCegarLoop]: 3392 mSDtfsCounter, 152 mSDsluCounter, 3256 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 6648 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 15:04:37,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 6648 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 535 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 15:04:37,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211059 states. [2022-12-14 15:04:43,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211059 to 183153. [2022-12-14 15:04:43,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183153 states, 159595 states have (on average 1.523500109652558) internal successors, (243143), 160109 states have internal predecessors, (243143), 16132 states have call successors, (16132), 7424 states have call predecessors, (16132), 7424 states have return successors, (16132), 15620 states have call predecessors, (16132), 16132 states have call successors, (16132) [2022-12-14 15:04:44,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183153 states to 183153 states and 275407 transitions. [2022-12-14 15:04:44,343 INFO L78 Accepts]: Start accepts. Automaton has 183153 states and 275407 transitions. Word has length 178 [2022-12-14 15:04:44,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:04:44,344 INFO L495 AbstractCegarLoop]: Abstraction has 183153 states and 275407 transitions. [2022-12-14 15:04:44,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 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) [2022-12-14 15:04:44,344 INFO L276 IsEmpty]: Start isEmpty. Operand 183153 states and 275407 transitions. [2022-12-14 15:04:44,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-12-14 15:04:44,641 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:04:44,641 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-12-14 15:04:44,647 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b436f4-9cd0-4784-9151-83a384ccc6e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 15:04:44,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b436f4-9cd0-4784-9151-83a384ccc6e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:04:44,843 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:04:44,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:04:44,844 INFO L85 PathProgramCache]: Analyzing trace with hash 967546244, now seen corresponding path program 2 times [2022-12-14 15:04:44,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:04:44,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843648383] [2022-12-14 15:04:44,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:04:44,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:04:44,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:04:45,084 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 10 proven. 61 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-12-14 15:04:45,084 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:04:45,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843648383] [2022-12-14 15:04:45,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843648383] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:04:45,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077710161] [2022-12-14 15:04:45,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 15:04:45,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:04:45,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b436f4-9cd0-4784-9151-83a384ccc6e6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:04:45,086 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b436f4-9cd0-4784-9151-83a384ccc6e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:04:45,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b436f4-9cd0-4784-9151-83a384ccc6e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 15:04:45,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 15:04:45,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:04:45,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 719 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 15:04:45,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:04:45,270 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-12-14 15:04:45,270 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:04:45,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077710161] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:04:45,270 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:04:45,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 15:04:45,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845966803] [2022-12-14 15:04:45,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:04:45,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:04:45,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:04:45,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:04:45,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:04:45,272 INFO L87 Difference]: Start difference. First operand 183153 states and 275407 transitions. Second operand has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 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) [2022-12-14 15:04:50,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:04:50,668 INFO L93 Difference]: Finished difference Result 276341 states and 420433 transitions. [2022-12-14 15:04:50,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:04:50,669 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 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 178 [2022-12-14 15:04:50,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:04:51,197 INFO L225 Difference]: With dead ends: 276341 [2022-12-14 15:04:51,197 INFO L226 Difference]: Without dead ends: 183667 [2022-12-14 15:04:51,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:04:51,341 INFO L413 NwaCegarLoop]: 3411 mSDtfsCounter, 200 mSDsluCounter, 3238 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 6649 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 15:04:51,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 6649 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 539 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 15:04:51,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183667 states. [2022-12-14 15:04:57,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183667 to 181873. [2022-12-14 15:04:57,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181873 states, 158315 states have (on average 1.5099453620945582) internal successors, (239047), 158829 states have internal predecessors, (239047), 16132 states have call successors, (16132), 7424 states have call predecessors, (16132), 7424 states have return successors, (16132), 15620 states have call predecessors, (16132), 16132 states have call successors, (16132) [2022-12-14 15:04:57,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181873 states to 181873 states and 271311 transitions. [2022-12-14 15:04:57,975 INFO L78 Accepts]: Start accepts. Automaton has 181873 states and 271311 transitions. Word has length 178 [2022-12-14 15:04:57,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:04:57,976 INFO L495 AbstractCegarLoop]: Abstraction has 181873 states and 271311 transitions. [2022-12-14 15:04:57,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 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) [2022-12-14 15:04:57,976 INFO L276 IsEmpty]: Start isEmpty. Operand 181873 states and 271311 transitions. [2022-12-14 15:04:58,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-12-14 15:04:58,344 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:04:58,345 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-12-14 15:04:58,350 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b436f4-9cd0-4784-9151-83a384ccc6e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 15:04:58,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b436f4-9cd0-4784-9151-83a384ccc6e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-14 15:04:58,547 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:04:58,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:04:58,548 INFO L85 PathProgramCache]: Analyzing trace with hash -2052318363, now seen corresponding path program 1 times [2022-12-14 15:04:58,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:04:58,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348232145] [2022-12-14 15:04:58,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:04:58,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:04:58,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:04:58,828 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 10 proven. 60 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-12-14 15:04:58,828 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:04:58,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348232145] [2022-12-14 15:04:58,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348232145] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:04:58,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497755439] [2022-12-14 15:04:58,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:04:58,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:04:58,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b436f4-9cd0-4784-9151-83a384ccc6e6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:04:58,829 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b436f4-9cd0-4784-9151-83a384ccc6e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:04:58,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b436f4-9cd0-4784-9151-83a384ccc6e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 15:04:58,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:04:58,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 1081 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 15:04:59,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:04:59,037 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-12-14 15:04:59,038 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:04:59,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497755439] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:04:59,038 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:04:59,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 15:04:59,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760859861] [2022-12-14 15:04:59,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:04:59,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:04:59,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:04:59,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:04:59,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:04:59,040 INFO L87 Difference]: Start difference. First operand 181873 states and 271311 transitions. Second operand has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 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) [2022-12-14 15:05:05,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:05:05,240 INFO L93 Difference]: Finished difference Result 313581 states and 459722 transitions. [2022-12-14 15:05:05,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:05:05,240 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 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 178 [2022-12-14 15:05:05,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:05:05,777 INFO L225 Difference]: With dead ends: 313581 [2022-12-14 15:05:05,777 INFO L226 Difference]: Without dead ends: 222827 [2022-12-14 15:05:05,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:05:05,949 INFO L413 NwaCegarLoop]: 3275 mSDtfsCounter, 3466 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3466 SdHoareTripleChecker+Valid, 3329 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 15:05:05,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3466 Valid, 3329 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 15:05:06,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222827 states. [2022-12-14 15:05:12,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222827 to 222827. [2022-12-14 15:05:12,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222827 states, 196201 states have (on average 1.4558386552565992) internal successors, (285637), 196715 states have internal predecessors, (285637), 17154 states have call successors, (17154), 9470 states have call predecessors, (17154), 9470 states have return successors, (17154), 16642 states have call predecessors, (17154), 17154 states have call successors, (17154) [2022-12-14 15:05:13,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222827 states to 222827 states and 319945 transitions. [2022-12-14 15:05:13,278 INFO L78 Accepts]: Start accepts. Automaton has 222827 states and 319945 transitions. Word has length 178 [2022-12-14 15:05:13,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:05:13,279 INFO L495 AbstractCegarLoop]: Abstraction has 222827 states and 319945 transitions. [2022-12-14 15:05:13,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 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) [2022-12-14 15:05:13,279 INFO L276 IsEmpty]: Start isEmpty. Operand 222827 states and 319945 transitions. [2022-12-14 15:05:13,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-12-14 15:05:13,591 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:05:13,591 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-12-14 15:05:13,597 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b436f4-9cd0-4784-9151-83a384ccc6e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-12-14 15:05:13,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b436f4-9cd0-4784-9151-83a384ccc6e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-14 15:05:13,793 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:05:13,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:05:13,795 INFO L85 PathProgramCache]: Analyzing trace with hash 521723316, now seen corresponding path program 1 times [2022-12-14 15:05:13,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:05:13,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149101267] [2022-12-14 15:05:13,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:05:13,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:05:13,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:05:14,015 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 10 proven. 59 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-12-14 15:05:14,015 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:05:14,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149101267] [2022-12-14 15:05:14,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149101267] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:05:14,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913086840] [2022-12-14 15:05:14,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:05:14,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:05:14,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b436f4-9cd0-4784-9151-83a384ccc6e6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:05:14,017 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b436f4-9cd0-4784-9151-83a384ccc6e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:05:14,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b436f4-9cd0-4784-9151-83a384ccc6e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 15:05:14,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:05:14,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 1084 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 15:05:14,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:05:14,223 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 92 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 15:05:14,223 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:05:14,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913086840] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:05:14,223 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:05:14,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 15:05:14,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588153532] [2022-12-14 15:05:14,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:05:14,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:05:14,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:05:14,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:05:14,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:05:14,224 INFO L87 Difference]: Start difference. First operand 222827 states and 319945 transitions. Second operand has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 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) [2022-12-14 15:05:23,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:05:23,867 INFO L93 Difference]: Finished difference Result 531045 states and 775872 transitions. [2022-12-14 15:05:23,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:05:23,868 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 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 178 [2022-12-14 15:05:23,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:05:24,666 INFO L225 Difference]: With dead ends: 531045 [2022-12-14 15:05:24,666 INFO L226 Difference]: Without dead ends: 309865 [2022-12-14 15:05:24,933 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:05:24,933 INFO L413 NwaCegarLoop]: 3273 mSDtfsCounter, 100 mSDsluCounter, 3246 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 6519 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 15:05:24,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 6519 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 508 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 15:05:25,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309865 states. [2022-12-14 15:05:33,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309865 to 256115. [2022-12-14 15:05:33,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256115 states, 227949 states have (on average 1.4878108699753014) internal successors, (339145), 228464 states have internal predecessors, (339145), 17924 states have call successors, (17924), 10240 states have call predecessors, (17924), 10240 states have return successors, (17924), 17411 states have call predecessors, (17924), 17924 states have call successors, (17924) [2022-12-14 15:05:34,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256115 states to 256115 states and 374993 transitions. [2022-12-14 15:05:34,411 INFO L78 Accepts]: Start accepts. Automaton has 256115 states and 374993 transitions. Word has length 178 [2022-12-14 15:05:34,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:05:34,411 INFO L495 AbstractCegarLoop]: Abstraction has 256115 states and 374993 transitions. [2022-12-14 15:05:34,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 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) [2022-12-14 15:05:34,411 INFO L276 IsEmpty]: Start isEmpty. Operand 256115 states and 374993 transitions. [2022-12-14 15:05:34,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-12-14 15:05:34,792 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:05:34,792 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-12-14 15:05:34,798 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b436f4-9cd0-4784-9151-83a384ccc6e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 15:05:34,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b436f4-9cd0-4784-9151-83a384ccc6e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-14 15:05:34,994 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:05:34,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:05:34,995 INFO L85 PathProgramCache]: Analyzing trace with hash -656576009, now seen corresponding path program 1 times [2022-12-14 15:05:34,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:05:34,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085368782] [2022-12-14 15:05:34,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:05:34,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:05:35,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:05:35,204 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 13 proven. 59 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-12-14 15:05:35,204 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:05:35,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085368782] [2022-12-14 15:05:35,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085368782] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:05:35,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951873171] [2022-12-14 15:05:35,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:05:35,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:05:35,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b436f4-9cd0-4784-9151-83a384ccc6e6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:05:35,205 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b436f4-9cd0-4784-9151-83a384ccc6e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:05:35,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b436f4-9cd0-4784-9151-83a384ccc6e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 15:05:35,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:05:35,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 1091 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 15:05:35,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:05:35,396 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 114 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 15:05:35,397 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:05:35,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951873171] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:05:35,397 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:05:35,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-12-14 15:05:35,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158232960] [2022-12-14 15:05:35,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:05:35,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 15:05:35,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:05:35,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 15:05:35,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-12-14 15:05:35,398 INFO L87 Difference]: Start difference. First operand 256115 states and 374993 transitions. Second operand has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 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) [2022-12-14 15:05:52,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:05:52,026 INFO L93 Difference]: Finished difference Result 782457 states and 1140945 transitions. [2022-12-14 15:05:52,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 15:05:52,027 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 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 179 [2022-12-14 15:05:52,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:05:53,628 INFO L225 Difference]: With dead ends: 782457 [2022-12-14 15:05:53,628 INFO L226 Difference]: Without dead ends: 527989 [2022-12-14 15:05:53,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-12-14 15:05:53,984 INFO L413 NwaCegarLoop]: 3451 mSDtfsCounter, 3504 mSDsluCounter, 3598 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3504 SdHoareTripleChecker+Valid, 7049 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 15:05:53,984 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3504 Valid, 7049 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 621 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 15:05:54,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527989 states. [2022-12-14 15:06:12,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527989 to 525931. [2022-12-14 15:06:12,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525931 states, 469099 states have (on average 1.4629726347743226) internal successors, (686279), 471151 states have internal predecessors, (686279), 35329 states have call successors, (35329), 20477 states have call predecessors, (35329), 21501 states have return successors, (42493), 34303 states have call predecessors, (42493), 35329 states have call successors, (42493) [2022-12-14 15:06:14,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525931 states to 525931 states and 764101 transitions. [2022-12-14 15:06:14,573 INFO L78 Accepts]: Start accepts. Automaton has 525931 states and 764101 transitions. Word has length 179 [2022-12-14 15:06:14,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:06:14,574 INFO L495 AbstractCegarLoop]: Abstraction has 525931 states and 764101 transitions. [2022-12-14 15:06:14,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 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) [2022-12-14 15:06:14,574 INFO L276 IsEmpty]: Start isEmpty. Operand 525931 states and 764101 transitions. [2022-12-14 15:06:15,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-12-14 15:06:15,580 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:06:15,580 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-12-14 15:06:15,587 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b436f4-9cd0-4784-9151-83a384ccc6e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 15:06:15,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b436f4-9cd0-4784-9151-83a384ccc6e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 15:06:15,782 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:06:15,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:06:15,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1817423368, now seen corresponding path program 2 times [2022-12-14 15:06:15,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:06:15,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806057197] [2022-12-14 15:06:15,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:06:15,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:06:15,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:06:16,119 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 13 proven. 60 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-12-14 15:06:16,119 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:06:16,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806057197] [2022-12-14 15:06:16,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806057197] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:06:16,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436915746] [2022-12-14 15:06:16,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 15:06:16,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:06:16,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b436f4-9cd0-4784-9151-83a384ccc6e6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:06:16,120 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b436f4-9cd0-4784-9151-83a384ccc6e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:06:16,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b436f4-9cd0-4784-9151-83a384ccc6e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 15:06:16,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 15:06:16,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:06:16,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 708 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 15:06:16,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:06:16,313 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 114 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 15:06:16,313 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:06:16,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436915746] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:06:16,313 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:06:16,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 15:06:16,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129659671] [2022-12-14 15:06:16,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:06:16,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:06:16,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:06:16,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:06:16,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:06:16,315 INFO L87 Difference]: Start difference. First operand 525931 states and 764101 transitions. Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 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) [2022-12-14 15:06:42,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:06:42,402 INFO L93 Difference]: Finished difference Result 1051233 states and 1555113 transitions. [2022-12-14 15:06:42,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:06:42,403 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 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 179 [2022-12-14 15:06:42,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:06:44,669 INFO L225 Difference]: With dead ends: 1051233 [2022-12-14 15:06:44,669 INFO L226 Difference]: Without dead ends: 773221 [2022-12-14 15:06:45,344 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:06:45,345 INFO L413 NwaCegarLoop]: 3285 mSDtfsCounter, 3451 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3451 SdHoareTripleChecker+Valid, 3464 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 15:06:45,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3451 Valid, 3464 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 15:06:45,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 773221 states. [2022-12-14 15:07:12,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 773221 to 769119. [2022-12-14 15:07:12,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 769119 states, 684647 states have (on average 1.463041538194135) internal successors, (1001667), 687211 states have internal predecessors, (1001667), 52733 states have call successors, (52733), 30713 states have call predecessors, (52733), 31737 states have return successors, (69621), 51195 states have call predecessors, (69621), 52733 states have call successors, (69621) [2022-12-14 15:07:15,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 769119 states to 769119 states and 1124021 transitions. [2022-12-14 15:07:15,287 INFO L78 Accepts]: Start accepts. Automaton has 769119 states and 1124021 transitions. Word has length 179 [2022-12-14 15:07:15,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:07:15,287 INFO L495 AbstractCegarLoop]: Abstraction has 769119 states and 1124021 transitions. [2022-12-14 15:07:15,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 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) [2022-12-14 15:07:15,288 INFO L276 IsEmpty]: Start isEmpty. Operand 769119 states and 1124021 transitions. [2022-12-14 15:07:17,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-12-14 15:07:17,000 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:07:17,000 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-12-14 15:07:17,006 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b436f4-9cd0-4784-9151-83a384ccc6e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 15:07:17,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b436f4-9cd0-4784-9151-83a384ccc6e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 15:07:17,201 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:07:17,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:07:17,202 INFO L85 PathProgramCache]: Analyzing trace with hash 514418732, now seen corresponding path program 3 times [2022-12-14 15:07:17,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:07:17,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557766376] [2022-12-14 15:07:17,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:07:17,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:07:17,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:07:17,389 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 13 proven. 60 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-12-14 15:07:17,389 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:07:17,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557766376] [2022-12-14 15:07:17,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557766376] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:07:17,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171215876] [2022-12-14 15:07:17,390 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 15:07:17,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:07:17,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b436f4-9cd0-4784-9151-83a384ccc6e6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:07:17,391 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b436f4-9cd0-4784-9151-83a384ccc6e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:07:17,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b436f4-9cd0-4784-9151-83a384ccc6e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 15:07:17,485 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 15:07:17,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:07:17,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 665 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 15:07:17,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:07:17,569 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-12-14 15:07:17,569 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:07:17,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171215876] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:07:17,569 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:07:17,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 15:07:17,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286797855] [2022-12-14 15:07:17,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:07:17,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:07:17,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:07:17,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:07:17,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:07:17,571 INFO L87 Difference]: Start difference. First operand 769119 states and 1124021 transitions. Second operand has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 15:07:48,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:07:48,289 INFO L93 Difference]: Finished difference Result 1370169 states and 1988480 transitions. [2022-12-14 15:07:48,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:07:48,290 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 179 [2022-12-14 15:07:48,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:07:50,890 INFO L225 Difference]: With dead ends: 1370169 [2022-12-14 15:07:50,890 INFO L226 Difference]: Without dead ends: 845897 [2022-12-14 15:07:51,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:07:51,891 INFO L413 NwaCegarLoop]: 3277 mSDtfsCounter, 3413 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3413 SdHoareTripleChecker+Valid, 3338 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 15:07:51,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3413 Valid, 3338 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 15:07:52,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845897 states. [2022-12-14 15:08:22,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845897 to 844617. [2022-12-14 15:08:23,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 844617 states, 755809 states have (on average 1.4357026709128893) internal successors, (1085117), 756837 states have internal predecessors, (1085117), 54259 states have call successors, (54259), 35311 states have call predecessors, (54259), 34547 states have return successors, (66541), 52469 states have call predecessors, (66541), 54259 states have call successors, (66541) [2022-12-14 15:08:26,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844617 states to 844617 states and 1205917 transitions. [2022-12-14 15:08:26,353 INFO L78 Accepts]: Start accepts. Automaton has 844617 states and 1205917 transitions. Word has length 179 [2022-12-14 15:08:26,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:08:26,354 INFO L495 AbstractCegarLoop]: Abstraction has 844617 states and 1205917 transitions. [2022-12-14 15:08:26,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 15:08:26,354 INFO L276 IsEmpty]: Start isEmpty. Operand 844617 states and 1205917 transitions. [2022-12-14 15:08:28,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-12-14 15:08:28,048 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:08:28,048 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:08:28,053 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b436f4-9cd0-4784-9151-83a384ccc6e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 15:08:28,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b436f4-9cd0-4784-9151-83a384ccc6e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 15:08:28,250 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:08:28,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:08:28,251 INFO L85 PathProgramCache]: Analyzing trace with hash 29244013, now seen corresponding path program 1 times [2022-12-14 15:08:28,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:08:28,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422359135] [2022-12-14 15:08:28,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:08:28,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:08:28,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:08:28,449 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 13 proven. 61 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-12-14 15:08:28,450 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:08:28,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422359135] [2022-12-14 15:08:28,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422359135] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:08:28,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414001037] [2022-12-14 15:08:28,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:08:28,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:08:28,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b436f4-9cd0-4784-9151-83a384ccc6e6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:08:28,451 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b436f4-9cd0-4784-9151-83a384ccc6e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:08:28,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b436f4-9cd0-4784-9151-83a384ccc6e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 15:08:28,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:08:28,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 1085 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 15:08:28,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:08:28,609 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-12-14 15:08:28,610 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:08:28,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414001037] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:08:28,610 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:08:28,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 15:08:28,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488420657] [2022-12-14 15:08:28,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:08:28,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:08:28,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:08:28,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:08:28,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:08:28,611 INFO L87 Difference]: Start difference. First operand 844617 states and 1205917 transitions. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 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) [2022-12-14 15:08:51,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:08:51,191 INFO L93 Difference]: Finished difference Result 1123909 states and 1617553 transitions. [2022-12-14 15:08:51,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:08:51,192 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 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 179 [2022-12-14 15:08:51,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:08:52,841 INFO L225 Difference]: With dead ends: 1123909 [2022-12-14 15:08:52,841 INFO L226 Difference]: Without dead ends: 563039 [2022-12-14 15:08:53,762 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:08:53,763 INFO L413 NwaCegarLoop]: 3411 mSDtfsCounter, 197 mSDsluCounter, 3237 mSDsCounter, 0 mSdLazyCounter, 541 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 6648 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 15:08:53,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 6648 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 541 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 15:08:54,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563039 states. [2022-12-14 15:09:14,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563039 to 560477. [2022-12-14 15:09:15,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560477 states, 501351 states have (on average 1.4301258000881618) internal successors, (716995), 501867 states have internal predecessors, (716995), 36347 states have call successors, (36347), 23543 states have call predecessors, (36347), 22777 states have return successors, (38395), 35067 states have call predecessors, (38395), 36347 states have call successors, (38395) [2022-12-14 15:09:16,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560477 states to 560477 states and 791737 transitions. [2022-12-14 15:09:16,617 INFO L78 Accepts]: Start accepts. Automaton has 560477 states and 791737 transitions. Word has length 179 [2022-12-14 15:09:16,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:09:16,618 INFO L495 AbstractCegarLoop]: Abstraction has 560477 states and 791737 transitions. [2022-12-14 15:09:16,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 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) [2022-12-14 15:09:16,618 INFO L276 IsEmpty]: Start isEmpty. Operand 560477 states and 791737 transitions. [2022-12-14 15:09:17,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-12-14 15:09:17,801 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:09:17,801 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-12-14 15:09:17,807 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b436f4-9cd0-4784-9151-83a384ccc6e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-14 15:09:18,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b436f4-9cd0-4784-9151-83a384ccc6e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:09:18,003 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:09:18,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:09:18,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1393044752, now seen corresponding path program 1 times [2022-12-14 15:09:18,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:09:18,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2151016] [2022-12-14 15:09:18,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:09:18,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:09:18,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:09:18,196 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 13 proven. 61 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-12-14 15:09:18,196 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:09:18,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2151016] [2022-12-14 15:09:18,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2151016] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:09:18,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573576718] [2022-12-14 15:09:18,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:09:18,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:09:18,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b436f4-9cd0-4784-9151-83a384ccc6e6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:09:18,198 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b436f4-9cd0-4784-9151-83a384ccc6e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:09:18,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b436f4-9cd0-4784-9151-83a384ccc6e6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 15:09:18,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:09:18,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 1087 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 15:09:18,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:09:18,422 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-12-14 15:09:18,422 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:09:18,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573576718] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:09:18,423 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:09:18,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-12-14 15:09:18,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676745970] [2022-12-14 15:09:18,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:09:18,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 15:09:18,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:09:18,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 15:09:18,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-12-14 15:09:18,424 INFO L87 Difference]: Start difference. First operand 560477 states and 791737 transitions. Second operand has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 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)