./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a 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_e20d7429-73a4-47d4-9b9d-bc1d8c77200b/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20d7429-73a4-47d4-9b9d-bc1d8c77200b/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20d7429-73a4-47d4-9b9d-bc1d8c77200b/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20d7429-73a4-47d4-9b9d-bc1d8c77200b/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20d7429-73a4-47d4-9b9d-bc1d8c77200b/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20d7429-73a4-47d4-9b9d-bc1d8c77200b/bin/utaipan-ByfvJB40ur --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 291c2115713bbaa0f9f6deebfd096e226de91dfa7091a11105c0815d1cda6526 --- 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-38b53e6 [2022-11-25 22:36:48,513 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 22:36:48,515 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 22:36:48,532 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 22:36:48,533 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 22:36:48,534 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 22:36:48,535 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 22:36:48,536 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 22:36:48,538 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 22:36:48,539 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 22:36:48,540 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 22:36:48,541 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 22:36:48,542 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 22:36:48,543 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 22:36:48,544 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 22:36:48,548 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 22:36:48,549 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 22:36:48,550 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 22:36:48,552 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 22:36:48,554 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 22:36:48,558 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 22:36:48,560 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 22:36:48,561 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 22:36:48,562 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 22:36:48,565 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 22:36:48,565 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 22:36:48,566 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 22:36:48,567 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 22:36:48,567 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 22:36:48,568 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 22:36:48,569 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 22:36:48,569 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 22:36:48,570 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 22:36:48,581 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 22:36:48,584 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 22:36:48,584 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 22:36:48,585 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 22:36:48,585 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 22:36:48,585 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 22:36:48,589 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 22:36:48,590 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 22:36:48,591 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20d7429-73a4-47d4-9b9d-bc1d8c77200b/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-25 22:36:48,627 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 22:36:48,627 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 22:36:48,628 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 22:36:48,628 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 22:36:48,629 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 22:36:48,629 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 22:36:48,629 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 22:36:48,630 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 22:36:48,630 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 22:36:48,630 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-25 22:36:48,631 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 22:36:48,631 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 22:36:48,632 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-25 22:36:48,632 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-25 22:36:48,632 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 22:36:48,632 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-25 22:36:48,633 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-25 22:36:48,633 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-25 22:36:48,634 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 22:36:48,634 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 22:36:48,634 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 22:36:48,634 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 22:36:48,635 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 22:36:48,635 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 22:36:48,635 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 22:36:48,635 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 22:36:48,636 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 22:36:48,636 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 22:36:48,636 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 22:36:48,636 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 22:36:48,637 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 22:36:48,637 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 22:36:48,637 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 22:36:48,638 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 22:36:48,638 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-25 22:36:48,638 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 22:36:48,638 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 22:36:48,639 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-25 22:36:48,639 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 22:36:48,639 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 22:36:48,639 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 22:36:48,639 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_e20d7429-73a4-47d4-9b9d-bc1d8c77200b/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20d7429-73a4-47d4-9b9d-bc1d8c77200b/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 291c2115713bbaa0f9f6deebfd096e226de91dfa7091a11105c0815d1cda6526 [2022-11-25 22:36:48,999 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 22:36:49,038 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 22:36:49,041 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 22:36:49,042 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 22:36:49,043 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 22:36:49,044 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20d7429-73a4-47d4-9b9d-bc1d8c77200b/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2022-11-25 22:36:52,187 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 22:36:52,458 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 22:36:52,467 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20d7429-73a4-47d4-9b9d-bc1d8c77200b/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2022-11-25 22:36:52,483 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20d7429-73a4-47d4-9b9d-bc1d8c77200b/bin/utaipan-ByfvJB40ur/data/5ad0c1789/7dd76312183b4c10a19bbbaf6d0ea190/FLAG6f245068f [2022-11-25 22:36:52,500 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20d7429-73a4-47d4-9b9d-bc1d8c77200b/bin/utaipan-ByfvJB40ur/data/5ad0c1789/7dd76312183b4c10a19bbbaf6d0ea190 [2022-11-25 22:36:52,504 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 22:36:52,506 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 22:36:52,512 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 22:36:52,513 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 22:36:52,518 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 22:36:52,519 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 10:36:52" (1/1) ... [2022-11-25 22:36:52,520 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@510b32d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:36:52, skipping insertion in model container [2022-11-25 22:36:52,521 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 10:36:52" (1/1) ... [2022-11-25 22:36:52,529 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 22:36:52,585 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 22:36:52,918 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_e20d7429-73a4-47d4-9b9d-bc1d8c77200b/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[7181,7194] [2022-11-25 22:36:52,947 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 22:36:52,962 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 22:36:53,009 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_e20d7429-73a4-47d4-9b9d-bc1d8c77200b/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[7181,7194] [2022-11-25 22:36:53,031 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 22:36:53,049 INFO L208 MainTranslator]: Completed translation [2022-11-25 22:36:53,049 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:36:53 WrapperNode [2022-11-25 22:36:53,049 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 22:36:53,051 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 22:36:53,051 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 22:36:53,051 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 22:36:53,059 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:36:53" (1/1) ... [2022-11-25 22:36:53,072 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:36:53" (1/1) ... [2022-11-25 22:36:53,113 INFO L138 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 572 [2022-11-25 22:36:53,114 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 22:36:53,114 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 22:36:53,114 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 22:36:53,114 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 22:36:53,134 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:36:53" (1/1) ... [2022-11-25 22:36:53,134 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:36:53" (1/1) ... [2022-11-25 22:36:53,137 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:36:53" (1/1) ... [2022-11-25 22:36:53,138 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:36:53" (1/1) ... [2022-11-25 22:36:53,145 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:36:53" (1/1) ... [2022-11-25 22:36:53,150 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:36:53" (1/1) ... [2022-11-25 22:36:53,152 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:36:53" (1/1) ... [2022-11-25 22:36:53,154 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:36:53" (1/1) ... [2022-11-25 22:36:53,158 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 22:36:53,159 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 22:36:53,159 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 22:36:53,160 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 22:36:53,160 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:36:53" (1/1) ... [2022-11-25 22:36:53,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 22:36:53,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20d7429-73a4-47d4-9b9d-bc1d8c77200b/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:36:53,216 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20d7429-73a4-47d4-9b9d-bc1d8c77200b/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 22:36:53,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20d7429-73a4-47d4-9b9d-bc1d8c77200b/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 22:36:53,267 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 22:36:53,267 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 22:36:53,268 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 22:36:53,268 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 22:36:53,400 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 22:36:53,403 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 22:36:54,101 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 22:36:54,468 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 22:36:54,468 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-25 22:36:54,471 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 10:36:54 BoogieIcfgContainer [2022-11-25 22:36:54,471 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 22:36:54,476 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 22:36:54,476 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 22:36:54,479 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 22:36:54,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 10:36:52" (1/3) ... [2022-11-25 22:36:54,482 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@af93283 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 10:36:54, skipping insertion in model container [2022-11-25 22:36:54,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:36:53" (2/3) ... [2022-11-25 22:36:54,485 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@af93283 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 10:36:54, skipping insertion in model container [2022-11-25 22:36:54,485 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 10:36:54" (3/3) ... [2022-11-25 22:36:54,487 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2022-11-25 22:36:54,505 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 22:36:54,505 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 22:36:54,556 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 22:36:54,564 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;@40b90242, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 22:36:54,565 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 22:36:54,572 INFO L276 IsEmpty]: Start isEmpty. Operand has 80 states, 78 states have (on average 1.7435897435897436) internal successors, (136), 79 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:36:54,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-25 22:36:54,579 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:36:54,580 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] [2022-11-25 22:36:54,581 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:36:54,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:36:54,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1024114290, now seen corresponding path program 1 times [2022-11-25 22:36:54,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:36:54,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035474589] [2022-11-25 22:36:54,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:36:54,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:36:54,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:36:55,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:36:55,114 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:36:55,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035474589] [2022-11-25 22:36:55,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035474589] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:36:55,115 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:36:55,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 22:36:55,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345947346] [2022-11-25 22:36:55,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:36:55,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:36:55,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:36:55,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:36:55,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:36:55,161 INFO L87 Difference]: Start difference. First operand has 80 states, 78 states have (on average 1.7435897435897436) internal successors, (136), 79 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:36:55,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:36:55,304 INFO L93 Difference]: Finished difference Result 182 states and 299 transitions. [2022-11-25 22:36:55,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:36:55,306 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-11-25 22:36:55,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:36:55,321 INFO L225 Difference]: With dead ends: 182 [2022-11-25 22:36:55,321 INFO L226 Difference]: Without dead ends: 121 [2022-11-25 22:36:55,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:36:55,328 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 91 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:36:55,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 294 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:36:55,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-11-25 22:36:55,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 119. [2022-11-25 22:36:55,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.5254237288135593) internal successors, (180), 118 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:36:55,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 180 transitions. [2022-11-25 22:36:55,397 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 180 transitions. Word has length 31 [2022-11-25 22:36:55,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:36:55,398 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 180 transitions. [2022-11-25 22:36:55,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:36:55,399 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 180 transitions. [2022-11-25 22:36:55,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-25 22:36:55,400 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:36:55,400 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] [2022-11-25 22:36:55,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 22:36:55,401 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:36:55,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:36:55,401 INFO L85 PathProgramCache]: Analyzing trace with hash 2140555947, now seen corresponding path program 1 times [2022-11-25 22:36:55,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:36:55,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727487092] [2022-11-25 22:36:55,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:36:55,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:36:55,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:36:55,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:36:55,530 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:36:55,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727487092] [2022-11-25 22:36:55,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727487092] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:36:55,531 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:36:55,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 22:36:55,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555680748] [2022-11-25 22:36:55,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:36:55,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:36:55,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:36:55,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:36:55,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:36:55,535 INFO L87 Difference]: Start difference. First operand 119 states and 180 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:36:55,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:36:55,643 INFO L93 Difference]: Finished difference Result 270 states and 425 transitions. [2022-11-25 22:36:55,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:36:55,644 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-11-25 22:36:55,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:36:55,646 INFO L225 Difference]: With dead ends: 270 [2022-11-25 22:36:55,646 INFO L226 Difference]: Without dead ends: 174 [2022-11-25 22:36:55,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:36:55,648 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 81 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:36:55,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 186 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:36:55,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-11-25 22:36:55,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 172. [2022-11-25 22:36:55,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 1.5380116959064327) internal successors, (263), 171 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:36:55,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 263 transitions. [2022-11-25 22:36:55,673 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 263 transitions. Word has length 33 [2022-11-25 22:36:55,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:36:55,674 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 263 transitions. [2022-11-25 22:36:55,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:36:55,674 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 263 transitions. [2022-11-25 22:36:55,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-25 22:36:55,675 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:36:55,675 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] [2022-11-25 22:36:55,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 22:36:55,676 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:36:55,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:36:55,677 INFO L85 PathProgramCache]: Analyzing trace with hash 859141400, now seen corresponding path program 1 times [2022-11-25 22:36:55,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:36:55,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211251718] [2022-11-25 22:36:55,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:36:55,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:36:55,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:36:55,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:36:55,762 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:36:55,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211251718] [2022-11-25 22:36:55,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211251718] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:36:55,763 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:36:55,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 22:36:55,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210814398] [2022-11-25 22:36:55,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:36:55,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:36:55,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:36:55,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:36:55,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:36:55,765 INFO L87 Difference]: Start difference. First operand 172 states and 263 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:36:55,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:36:55,837 INFO L93 Difference]: Finished difference Result 432 states and 684 transitions. [2022-11-25 22:36:55,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:36:55,838 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-11-25 22:36:55,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:36:55,840 INFO L225 Difference]: With dead ends: 432 [2022-11-25 22:36:55,840 INFO L226 Difference]: Without dead ends: 284 [2022-11-25 22:36:55,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:36:55,842 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 82 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 22:36:55,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 230 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 22:36:55,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-11-25 22:36:55,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 282. [2022-11-25 22:36:55,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 1.5693950177935942) internal successors, (441), 281 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:36:55,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 441 transitions. [2022-11-25 22:36:55,881 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 441 transitions. Word has length 35 [2022-11-25 22:36:55,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:36:55,882 INFO L495 AbstractCegarLoop]: Abstraction has 282 states and 441 transitions. [2022-11-25 22:36:55,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:36:55,882 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 441 transitions. [2022-11-25 22:36:55,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-25 22:36:55,883 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:36:55,884 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] [2022-11-25 22:36:55,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 22:36:55,884 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:36:55,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:36:55,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1427630285, now seen corresponding path program 1 times [2022-11-25 22:36:55,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:36:55,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494283703] [2022-11-25 22:36:55,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:36:55,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:36:55,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:36:56,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:36:56,008 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:36:56,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494283703] [2022-11-25 22:36:56,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494283703] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:36:56,010 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:36:56,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 22:36:56,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965029000] [2022-11-25 22:36:56,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:36:56,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:36:56,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:36:56,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:36:56,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:36:56,013 INFO L87 Difference]: Start difference. First operand 282 states and 441 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:36:56,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:36:56,101 INFO L93 Difference]: Finished difference Result 701 states and 1116 transitions. [2022-11-25 22:36:56,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:36:56,102 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-11-25 22:36:56,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:36:56,104 INFO L225 Difference]: With dead ends: 701 [2022-11-25 22:36:56,104 INFO L226 Difference]: Without dead ends: 443 [2022-11-25 22:36:56,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:36:56,119 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 81 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 22:36:56,119 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 202 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 22:36:56,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2022-11-25 22:36:56,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 441. [2022-11-25 22:36:56,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 440 states have (on average 1.5795454545454546) internal successors, (695), 440 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:36:56,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 695 transitions. [2022-11-25 22:36:56,215 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 695 transitions. Word has length 37 [2022-11-25 22:36:56,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:36:56,215 INFO L495 AbstractCegarLoop]: Abstraction has 441 states and 695 transitions. [2022-11-25 22:36:56,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:36:56,216 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 695 transitions. [2022-11-25 22:36:56,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-25 22:36:56,219 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:36:56,219 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] [2022-11-25 22:36:56,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 22:36:56,220 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:36:56,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:36:56,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1953450624, now seen corresponding path program 1 times [2022-11-25 22:36:56,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:36:56,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008697736] [2022-11-25 22:36:56,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:36:56,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:36:56,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:36:56,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:36:56,313 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:36:56,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008697736] [2022-11-25 22:36:56,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008697736] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:36:56,314 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:36:56,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 22:36:56,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114899610] [2022-11-25 22:36:56,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:36:56,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:36:56,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:36:56,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:36:56,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:36:56,319 INFO L87 Difference]: Start difference. First operand 441 states and 695 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:36:56,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:36:56,482 INFO L93 Difference]: Finished difference Result 1141 states and 1828 transitions. [2022-11-25 22:36:56,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:36:56,484 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-11-25 22:36:56,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:36:56,491 INFO L225 Difference]: With dead ends: 1141 [2022-11-25 22:36:56,491 INFO L226 Difference]: Without dead ends: 737 [2022-11-25 22:36:56,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:36:56,497 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 77 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 22:36:56,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 211 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 22:36:56,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2022-11-25 22:36:56,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 735. [2022-11-25 22:36:56,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 735 states, 734 states have (on average 1.5885558583106267) internal successors, (1166), 734 states have internal predecessors, (1166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:36:56,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 1166 transitions. [2022-11-25 22:36:56,630 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 1166 transitions. Word has length 39 [2022-11-25 22:36:56,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:36:56,632 INFO L495 AbstractCegarLoop]: Abstraction has 735 states and 1166 transitions. [2022-11-25 22:36:56,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:36:56,633 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 1166 transitions. [2022-11-25 22:36:56,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-25 22:36:56,644 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:36:56,645 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] [2022-11-25 22:36:56,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 22:36:56,645 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:36:56,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:36:56,646 INFO L85 PathProgramCache]: Analyzing trace with hash -1510581615, now seen corresponding path program 1 times [2022-11-25 22:36:56,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:36:56,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889059615] [2022-11-25 22:36:56,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:36:56,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:36:56,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:36:56,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:36:56,771 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:36:56,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889059615] [2022-11-25 22:36:56,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889059615] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:36:56,772 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:36:56,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 22:36:56,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224990050] [2022-11-25 22:36:56,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:36:56,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:36:56,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:36:56,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:36:56,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:36:56,774 INFO L87 Difference]: Start difference. First operand 735 states and 1166 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:36:56,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:36:56,958 INFO L93 Difference]: Finished difference Result 1850 states and 2960 transitions. [2022-11-25 22:36:56,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:36:56,960 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-11-25 22:36:56,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:36:56,965 INFO L225 Difference]: With dead ends: 1850 [2022-11-25 22:36:56,965 INFO L226 Difference]: Without dead ends: 1152 [2022-11-25 22:36:56,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:36:56,968 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 76 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 22:36:56,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 204 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 22:36:56,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1152 states. [2022-11-25 22:36:57,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1152 to 1150. [2022-11-25 22:36:57,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1150 states, 1149 states have (on average 1.5900783289817233) internal successors, (1827), 1149 states have internal predecessors, (1827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:36:57,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 1827 transitions. [2022-11-25 22:36:57,119 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 1827 transitions. Word has length 41 [2022-11-25 22:36:57,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:36:57,119 INFO L495 AbstractCegarLoop]: Abstraction has 1150 states and 1827 transitions. [2022-11-25 22:36:57,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:36:57,120 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 1827 transitions. [2022-11-25 22:36:57,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-25 22:36:57,123 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:36:57,123 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] [2022-11-25 22:36:57,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 22:36:57,124 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:36:57,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:36:57,124 INFO L85 PathProgramCache]: Analyzing trace with hash -2123258818, now seen corresponding path program 1 times [2022-11-25 22:36:57,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:36:57,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213172190] [2022-11-25 22:36:57,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:36:57,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:36:57,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:36:57,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:36:57,295 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:36:57,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213172190] [2022-11-25 22:36:57,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213172190] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:36:57,295 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:36:57,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 22:36:57,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697183258] [2022-11-25 22:36:57,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:36:57,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 22:36:57,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:36:57,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 22:36:57,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 22:36:57,299 INFO L87 Difference]: Start difference. First operand 1150 states and 1827 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:36:57,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:36:57,824 INFO L93 Difference]: Finished difference Result 2925 states and 4663 transitions. [2022-11-25 22:36:57,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 22:36:57,825 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-11-25 22:36:57,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:36:57,834 INFO L225 Difference]: With dead ends: 2925 [2022-11-25 22:36:57,834 INFO L226 Difference]: Without dead ends: 1825 [2022-11-25 22:36:57,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-25 22:36:57,837 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 459 mSDsluCounter, 672 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 782 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:36:57,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [459 Valid, 782 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 22:36:57,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1825 states. [2022-11-25 22:36:58,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1825 to 1815. [2022-11-25 22:36:58,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1815 states, 1814 states have (on average 1.5804851157662625) internal successors, (2867), 1814 states have internal predecessors, (2867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:36:58,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1815 states to 1815 states and 2867 transitions. [2022-11-25 22:36:58,092 INFO L78 Accepts]: Start accepts. Automaton has 1815 states and 2867 transitions. Word has length 43 [2022-11-25 22:36:58,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:36:58,092 INFO L495 AbstractCegarLoop]: Abstraction has 1815 states and 2867 transitions. [2022-11-25 22:36:58,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:36:58,093 INFO L276 IsEmpty]: Start isEmpty. Operand 1815 states and 2867 transitions. [2022-11-25 22:36:58,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-25 22:36:58,094 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:36:58,094 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:36:58,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-25 22:36:58,094 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:36:58,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:36:58,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1459018124, now seen corresponding path program 1 times [2022-11-25 22:36:58,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:36:58,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003611489] [2022-11-25 22:36:58,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:36:58,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:36:58,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:36:58,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:36:58,213 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:36:58,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003611489] [2022-11-25 22:36:58,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003611489] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:36:58,213 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:36:58,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 22:36:58,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107232315] [2022-11-25 22:36:58,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:36:58,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 22:36:58,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:36:58,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 22:36:58,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:36:58,215 INFO L87 Difference]: Start difference. First operand 1815 states and 2867 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:36:58,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:36:58,539 INFO L93 Difference]: Finished difference Result 3582 states and 5673 transitions. [2022-11-25 22:36:58,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 22:36:58,540 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-11-25 22:36:58,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:36:58,553 INFO L225 Difference]: With dead ends: 3582 [2022-11-25 22:36:58,553 INFO L226 Difference]: Without dead ends: 1817 [2022-11-25 22:36:58,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 22:36:58,557 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 152 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:36:58,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 281 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:36:58,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1817 states. [2022-11-25 22:36:58,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1817 to 1815. [2022-11-25 22:36:58,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1815 states, 1814 states have (on average 1.5738699007717751) internal successors, (2855), 1814 states have internal predecessors, (2855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:36:58,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1815 states to 1815 states and 2855 transitions. [2022-11-25 22:36:58,823 INFO L78 Accepts]: Start accepts. Automaton has 1815 states and 2855 transitions. Word has length 44 [2022-11-25 22:36:58,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:36:58,824 INFO L495 AbstractCegarLoop]: Abstraction has 1815 states and 2855 transitions. [2022-11-25 22:36:58,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:36:58,824 INFO L276 IsEmpty]: Start isEmpty. Operand 1815 states and 2855 transitions. [2022-11-25 22:36:58,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-25 22:36:58,825 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:36:58,826 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:36:58,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-25 22:36:58,826 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:36:58,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:36:58,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1957132229, now seen corresponding path program 1 times [2022-11-25 22:36:58,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:36:58,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258214316] [2022-11-25 22:36:58,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:36:58,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:36:58,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:36:58,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:36:58,924 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:36:58,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258214316] [2022-11-25 22:36:58,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258214316] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:36:58,925 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:36:58,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 22:36:58,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250356435] [2022-11-25 22:36:58,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:36:58,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 22:36:58,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:36:58,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 22:36:58,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:36:58,928 INFO L87 Difference]: Start difference. First operand 1815 states and 2855 transitions. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:36:59,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:36:59,242 INFO L93 Difference]: Finished difference Result 3582 states and 5649 transitions. [2022-11-25 22:36:59,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 22:36:59,243 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-11-25 22:36:59,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:36:59,249 INFO L225 Difference]: With dead ends: 3582 [2022-11-25 22:36:59,249 INFO L226 Difference]: Without dead ends: 1817 [2022-11-25 22:36:59,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 22:36:59,257 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 160 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:36:59,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 287 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:36:59,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1817 states. [2022-11-25 22:36:59,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1817 to 1815. [2022-11-25 22:36:59,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1815 states, 1814 states have (on average 1.5672546857772878) internal successors, (2843), 1814 states have internal predecessors, (2843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:36:59,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1815 states to 1815 states and 2843 transitions. [2022-11-25 22:36:59,501 INFO L78 Accepts]: Start accepts. Automaton has 1815 states and 2843 transitions. Word has length 45 [2022-11-25 22:36:59,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:36:59,502 INFO L495 AbstractCegarLoop]: Abstraction has 1815 states and 2843 transitions. [2022-11-25 22:36:59,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:36:59,502 INFO L276 IsEmpty]: Start isEmpty. Operand 1815 states and 2843 transitions. [2022-11-25 22:36:59,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-25 22:36:59,503 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:36:59,503 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:36:59,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-25 22:36:59,503 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:36:59,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:36:59,504 INFO L85 PathProgramCache]: Analyzing trace with hash 488168795, now seen corresponding path program 1 times [2022-11-25 22:36:59,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:36:59,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611738230] [2022-11-25 22:36:59,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:36:59,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:36:59,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:36:59,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:36:59,621 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:36:59,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611738230] [2022-11-25 22:36:59,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611738230] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:36:59,621 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:36:59,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 22:36:59,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422981839] [2022-11-25 22:36:59,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:36:59,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 22:36:59,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:36:59,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 22:36:59,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:36:59,624 INFO L87 Difference]: Start difference. First operand 1815 states and 2843 transitions. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:36:59,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:36:59,936 INFO L93 Difference]: Finished difference Result 3582 states and 5625 transitions. [2022-11-25 22:36:59,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 22:36:59,937 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-11-25 22:36:59,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:36:59,943 INFO L225 Difference]: With dead ends: 3582 [2022-11-25 22:36:59,944 INFO L226 Difference]: Without dead ends: 1817 [2022-11-25 22:36:59,946 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 22:36:59,946 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 158 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:36:59,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 290 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:36:59,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1817 states. [2022-11-25 22:37:00,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1817 to 1815. [2022-11-25 22:37:00,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1815 states, 1814 states have (on average 1.5606394707828004) internal successors, (2831), 1814 states have internal predecessors, (2831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:37:00,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1815 states to 1815 states and 2831 transitions. [2022-11-25 22:37:00,176 INFO L78 Accepts]: Start accepts. Automaton has 1815 states and 2831 transitions. Word has length 46 [2022-11-25 22:37:00,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:37:00,176 INFO L495 AbstractCegarLoop]: Abstraction has 1815 states and 2831 transitions. [2022-11-25 22:37:00,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:37:00,176 INFO L276 IsEmpty]: Start isEmpty. Operand 1815 states and 2831 transitions. [2022-11-25 22:37:00,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-25 22:37:00,177 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:37:00,177 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] [2022-11-25 22:37:00,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-25 22:37:00,177 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:37:00,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:37:00,178 INFO L85 PathProgramCache]: Analyzing trace with hash -538535124, now seen corresponding path program 1 times [2022-11-25 22:37:00,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:37:00,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973823471] [2022-11-25 22:37:00,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:37:00,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:37:00,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:37:00,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:37:00,352 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:37:00,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973823471] [2022-11-25 22:37:00,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973823471] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:37:00,352 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:37:00,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 22:37:00,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083965905] [2022-11-25 22:37:00,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:37:00,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 22:37:00,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:37:00,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 22:37:00,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 22:37:00,354 INFO L87 Difference]: Start difference. First operand 1815 states and 2831 transitions. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:37:00,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:37:00,779 INFO L93 Difference]: Finished difference Result 3582 states and 5601 transitions. [2022-11-25 22:37:00,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 22:37:00,779 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-11-25 22:37:00,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:37:00,786 INFO L225 Difference]: With dead ends: 3582 [2022-11-25 22:37:00,786 INFO L226 Difference]: Without dead ends: 1817 [2022-11-25 22:37:00,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-25 22:37:00,789 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 63 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:37:00,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 361 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:37:00,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1817 states. [2022-11-25 22:37:01,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1817 to 1815. [2022-11-25 22:37:01,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1815 states, 1814 states have (on average 1.5562293274531422) internal successors, (2823), 1814 states have internal predecessors, (2823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:37:01,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1815 states to 1815 states and 2823 transitions. [2022-11-25 22:37:01,095 INFO L78 Accepts]: Start accepts. Automaton has 1815 states and 2823 transitions. Word has length 48 [2022-11-25 22:37:01,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:37:01,095 INFO L495 AbstractCegarLoop]: Abstraction has 1815 states and 2823 transitions. [2022-11-25 22:37:01,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:37:01,096 INFO L276 IsEmpty]: Start isEmpty. Operand 1815 states and 2823 transitions. [2022-11-25 22:37:01,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-25 22:37:01,096 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:37:01,097 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] [2022-11-25 22:37:01,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-25 22:37:01,097 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:37:01,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:37:01,098 INFO L85 PathProgramCache]: Analyzing trace with hash 449372663, now seen corresponding path program 1 times [2022-11-25 22:37:01,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:37:01,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748469200] [2022-11-25 22:37:01,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:37:01,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:37:01,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:37:01,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:37:01,292 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:37:01,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748469200] [2022-11-25 22:37:01,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748469200] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:37:01,293 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:37:01,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 22:37:01,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676011416] [2022-11-25 22:37:01,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:37:01,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 22:37:01,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:37:01,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 22:37:01,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 22:37:01,294 INFO L87 Difference]: Start difference. First operand 1815 states and 2823 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:37:01,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:37:01,776 INFO L93 Difference]: Finished difference Result 4559 states and 7084 transitions. [2022-11-25 22:37:01,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 22:37:01,777 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-11-25 22:37:01,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:37:01,786 INFO L225 Difference]: With dead ends: 4559 [2022-11-25 22:37:01,786 INFO L226 Difference]: Without dead ends: 2794 [2022-11-25 22:37:01,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-25 22:37:01,789 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 184 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:37:01,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 295 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:37:01,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2794 states. [2022-11-25 22:37:02,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2794 to 2792. [2022-11-25 22:37:02,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2792 states, 2791 states have (on average 1.5442493729845934) internal successors, (4310), 2791 states have internal predecessors, (4310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:37:02,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2792 states to 2792 states and 4310 transitions. [2022-11-25 22:37:02,211 INFO L78 Accepts]: Start accepts. Automaton has 2792 states and 4310 transitions. Word has length 51 [2022-11-25 22:37:02,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:37:02,212 INFO L495 AbstractCegarLoop]: Abstraction has 2792 states and 4310 transitions. [2022-11-25 22:37:02,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:37:02,212 INFO L276 IsEmpty]: Start isEmpty. Operand 2792 states and 4310 transitions. [2022-11-25 22:37:02,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-25 22:37:02,213 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:37:02,213 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:37:02,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-25 22:37:02,213 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:37:02,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:37:02,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1056372737, now seen corresponding path program 1 times [2022-11-25 22:37:02,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:37:02,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409700485] [2022-11-25 22:37:02,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:37:02,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:37:02,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:37:02,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:37:02,549 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:37:02,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409700485] [2022-11-25 22:37:02,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409700485] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:37:02,549 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:37:02,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-25 22:37:02,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070175807] [2022-11-25 22:37:02,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:37:02,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 22:37:02,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:37:02,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 22:37:02,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-25 22:37:02,553 INFO L87 Difference]: Start difference. First operand 2792 states and 4310 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:37:03,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:37:03,257 INFO L93 Difference]: Finished difference Result 3448 states and 5283 transitions. [2022-11-25 22:37:03,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 22:37:03,258 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-11-25 22:37:03,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:37:03,270 INFO L225 Difference]: With dead ends: 3448 [2022-11-25 22:37:03,270 INFO L226 Difference]: Without dead ends: 3446 [2022-11-25 22:37:03,272 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-25 22:37:03,273 INFO L413 NwaCegarLoop]: 226 mSDtfsCounter, 215 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 748 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:37:03,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 748 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 22:37:03,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3446 states. [2022-11-25 22:37:03,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3446 to 2798. [2022-11-25 22:37:03,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2798 states, 2797 states have (on average 1.5409367179120486) internal successors, (4310), 2797 states have internal predecessors, (4310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:37:03,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2798 states to 2798 states and 4310 transitions. [2022-11-25 22:37:03,810 INFO L78 Accepts]: Start accepts. Automaton has 2798 states and 4310 transitions. Word has length 52 [2022-11-25 22:37:03,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:37:03,811 INFO L495 AbstractCegarLoop]: Abstraction has 2798 states and 4310 transitions. [2022-11-25 22:37:03,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:37:03,811 INFO L276 IsEmpty]: Start isEmpty. Operand 2798 states and 4310 transitions. [2022-11-25 22:37:03,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-25 22:37:03,812 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:37:03,812 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:37:03,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-25 22:37:03,813 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:37:03,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:37:03,814 INFO L85 PathProgramCache]: Analyzing trace with hash -994794248, now seen corresponding path program 1 times [2022-11-25 22:37:03,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:37:03,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777829111] [2022-11-25 22:37:03,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:37:03,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:37:03,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:37:04,769 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 22:37:04,769 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:37:04,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777829111] [2022-11-25 22:37:04,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777829111] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:37:04,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191498274] [2022-11-25 22:37:04,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:37:04,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:37:04,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20d7429-73a4-47d4-9b9d-bc1d8c77200b/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:37:04,783 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20d7429-73a4-47d4-9b9d-bc1d8c77200b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:37:04,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e20d7429-73a4-47d4-9b9d-bc1d8c77200b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 22:37:04,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:37:04,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-25 22:37:04,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:37:06,309 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 22:37:06,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:37:10,978 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:37:10,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191498274] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:37:10,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1960456089] [2022-11-25 22:37:10,999 INFO L159 IcfgInterpreter]: Started Sifa with 53 locations of interest [2022-11-25 22:37:11,000 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:37:11,004 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:37:11,009 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:37:11,010 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:37:11,415 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:37:11,416 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:37:11,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2022-11-25 22:37:11,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:37:11,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:37:11,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:37:11,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2022-11-25 22:37:11,599 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-25 22:37:20,234 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-25 22:48:43,992 WARN L233 SmtUtils]: Spent 11.35s on a formula simplification that was a NOOP. DAG size: 502 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-25 22:49:00,871 WARN L233 SmtUtils]: Spent 5.60s on a formula simplification that was a NOOP. DAG size: 481 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-25 22:51:34,196 WARN L233 SmtUtils]: Spent 13.03s on a formula simplification that was a NOOP. DAG size: 494 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-25 22:51:54,385 WARN L233 SmtUtils]: Spent 6.77s on a formula simplification that was a NOOP. DAG size: 481 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)