./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.1.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a512628-4774-4525-9af1-a3b3a89e0f0b/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a512628-4774-4525-9af1-a3b3a89e0f0b/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a512628-4774-4525-9af1-a3b3a89e0f0b/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a512628-4774-4525-9af1-a3b3a89e0f0b/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.1.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a512628-4774-4525-9af1-a3b3a89e0f0b/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a512628-4774-4525-9af1-a3b3a89e0f0b/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6d5cb8d9caea7ccafc5dde86756b709e1bbbadc4ec66724ae09094031008d598 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 06:34:38,368 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 06:34:38,370 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 06:34:38,382 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 06:34:38,382 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 06:34:38,383 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 06:34:38,384 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 06:34:38,385 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 06:34:38,386 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 06:34:38,387 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 06:34:38,387 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 06:34:38,388 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 06:34:38,388 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 06:34:38,389 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 06:34:38,389 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 06:34:38,390 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 06:34:38,391 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 06:34:38,391 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 06:34:38,392 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 06:34:38,393 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 06:34:38,394 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 06:34:38,396 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 06:34:38,398 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 06:34:38,399 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 06:34:38,405 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 06:34:38,406 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 06:34:38,406 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 06:34:38,407 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 06:34:38,408 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 06:34:38,409 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 06:34:38,410 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 06:34:38,411 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 06:34:38,411 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 06:34:38,412 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 06:34:38,412 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 06:34:38,413 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 06:34:38,413 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 06:34:38,413 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 06:34:38,413 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 06:34:38,414 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 06:34:38,414 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 06:34:38,415 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a512628-4774-4525-9af1-a3b3a89e0f0b/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 06:34:38,428 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 06:34:38,428 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 06:34:38,428 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 06:34:38,429 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 06:34:38,429 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 06:34:38,429 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 06:34:38,429 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 06:34:38,429 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 06:34:38,430 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 06:34:38,430 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 06:34:38,430 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 06:34:38,430 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 06:34:38,430 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 06:34:38,430 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 06:34:38,430 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 06:34:38,430 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 06:34:38,430 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 06:34:38,431 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 06:34:38,431 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 06:34:38,431 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 06:34:38,431 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 06:34:38,432 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 06:34:38,432 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 06:34:38,432 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 06:34:38,432 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 06:34:38,432 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 06:34:38,432 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 06:34:38,432 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 06:34:38,432 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 06:34:38,432 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 06:34:38,433 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 06:34:38,433 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 06:34:38,433 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 06:34:38,433 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 06:34:38,433 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 06:34:38,433 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 06:34:38,433 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 06:34:38,433 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 06:34:38,434 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 06:34:38,434 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 06:34:38,434 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 06:34:38,434 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_8a512628-4774-4525-9af1-a3b3a89e0f0b/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a512628-4774-4525-9af1-a3b3a89e0f0b/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6d5cb8d9caea7ccafc5dde86756b709e1bbbadc4ec66724ae09094031008d598 [2022-12-14 06:34:38,604 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 06:34:38,622 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 06:34:38,625 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 06:34:38,626 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 06:34:38,626 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 06:34:38,628 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a512628-4774-4525-9af1-a3b3a89e0f0b/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.1.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2022-12-14 06:34:41,236 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 06:34:41,419 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 06:34:41,419 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a512628-4774-4525-9af1-a3b3a89e0f0b/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.1.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2022-12-14 06:34:41,427 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a512628-4774-4525-9af1-a3b3a89e0f0b/bin/utaipan-gh47qXpMRh/data/babab0d87/b3916bc39aac4b1c85e350d2b2f79e8a/FLAGd54fcdefd [2022-12-14 06:34:41,442 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a512628-4774-4525-9af1-a3b3a89e0f0b/bin/utaipan-gh47qXpMRh/data/babab0d87/b3916bc39aac4b1c85e350d2b2f79e8a [2022-12-14 06:34:41,444 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 06:34:41,446 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 06:34:41,447 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 06:34:41,447 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 06:34:41,450 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 06:34:41,451 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 06:34:41" (1/1) ... [2022-12-14 06:34:41,452 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d3bb9bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:34:41, skipping insertion in model container [2022-12-14 06:34:41,452 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 06:34:41" (1/1) ... [2022-12-14 06:34:41,459 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 06:34:41,508 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 06:34:41,732 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_8a512628-4774-4525-9af1-a3b3a89e0f0b/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.1.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c[10276,10289] [2022-12-14 06:34:41,786 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 06:34:41,800 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 06:34:41,863 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_8a512628-4774-4525-9af1-a3b3a89e0f0b/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.1.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c[10276,10289] [2022-12-14 06:34:41,901 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 06:34:41,918 INFO L208 MainTranslator]: Completed translation [2022-12-14 06:34:41,918 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:34:41 WrapperNode [2022-12-14 06:34:41,919 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 06:34:41,919 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 06:34:41,920 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 06:34:41,920 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 06:34:41,926 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:34:41" (1/1) ... [2022-12-14 06:34:41,937 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:34:41" (1/1) ... [2022-12-14 06:34:41,963 INFO L138 Inliner]: procedures = 24, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 827 [2022-12-14 06:34:41,963 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 06:34:41,964 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 06:34:41,964 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 06:34:41,964 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 06:34:41,970 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:34:41" (1/1) ... [2022-12-14 06:34:41,970 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:34:41" (1/1) ... [2022-12-14 06:34:41,973 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:34:41" (1/1) ... [2022-12-14 06:34:41,973 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:34:41" (1/1) ... [2022-12-14 06:34:41,979 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:34:41" (1/1) ... [2022-12-14 06:34:41,983 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:34:41" (1/1) ... [2022-12-14 06:34:41,984 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:34:41" (1/1) ... [2022-12-14 06:34:41,986 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:34:41" (1/1) ... [2022-12-14 06:34:41,988 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 06:34:41,989 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 06:34:41,989 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 06:34:41,989 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 06:34:41,990 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:34:41" (1/1) ... [2022-12-14 06:34:41,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 06:34:42,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a512628-4774-4525-9af1-a3b3a89e0f0b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:34:42,011 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a512628-4774-4525-9af1-a3b3a89e0f0b/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 06:34:42,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a512628-4774-4525-9af1-a3b3a89e0f0b/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 06:34:42,041 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 06:34:42,042 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 06:34:42,042 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 06:34:42,042 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 06:34:42,129 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 06:34:42,131 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 06:34:42,663 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 06:34:42,837 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 06:34:42,837 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-12-14 06:34:42,840 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 06:34:42 BoogieIcfgContainer [2022-12-14 06:34:42,840 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 06:34:42,848 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 06:34:42,848 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 06:34:42,851 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 06:34:42,851 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 06:34:41" (1/3) ... [2022-12-14 06:34:42,852 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@470b5b95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 06:34:42, skipping insertion in model container [2022-12-14 06:34:42,852 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:34:41" (2/3) ... [2022-12-14 06:34:42,852 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@470b5b95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 06:34:42, skipping insertion in model container [2022-12-14 06:34:42,852 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 06:34:42" (3/3) ... [2022-12-14 06:34:42,854 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr.5.1.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2022-12-14 06:34:42,869 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 06:34:42,869 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 06:34:42,912 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 06:34:42,918 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;@57c21a97, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 06:34:42,918 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 06:34:42,922 INFO L276 IsEmpty]: Start isEmpty. Operand has 182 states, 148 states have (on average 1.6486486486486487) internal successors, (244), 181 states have internal predecessors, (244), 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) [2022-12-14 06:34:42,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-12-14 06:34:42,930 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:34:42,930 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] [2022-12-14 06:34:42,931 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:34:42,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:34:42,935 INFO L85 PathProgramCache]: Analyzing trace with hash -2077008815, now seen corresponding path program 1 times [2022-12-14 06:34:42,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:34:42,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626125677] [2022-12-14 06:34:42,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:34:42,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:34:43,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:34:43,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:34:43,262 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:34:43,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626125677] [2022-12-14 06:34:43,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626125677] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:34:43,263 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:34:43,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 06:34:43,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68084335] [2022-12-14 06:34:43,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:34:43,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 06:34:43,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:34:43,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 06:34:43,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 06:34:43,292 INFO L87 Difference]: Start difference. First operand has 182 states, 148 states have (on average 1.6486486486486487) internal successors, (244), 181 states have internal predecessors, (244), 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 4 states, 4 states have (on average 12.0) internal successors, (48), 4 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) [2022-12-14 06:34:43,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:34:43,438 INFO L93 Difference]: Finished difference Result 307 states and 427 transitions. [2022-12-14 06:34:43,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 06:34:43,440 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 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 [2022-12-14 06:34:43,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:34:43,448 INFO L225 Difference]: With dead ends: 307 [2022-12-14 06:34:43,448 INFO L226 Difference]: Without dead ends: 148 [2022-12-14 06:34:43,450 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 [2022-12-14 06:34:43,453 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 62 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:34:43,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 567 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:34:43,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-12-14 06:34:43,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2022-12-14 06:34:43,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.3741496598639455) internal successors, (202), 147 states have internal predecessors, (202), 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) [2022-12-14 06:34:43,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 202 transitions. [2022-12-14 06:34:43,491 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 202 transitions. Word has length 48 [2022-12-14 06:34:43,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:34:43,491 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 202 transitions. [2022-12-14 06:34:43,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 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) [2022-12-14 06:34:43,492 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 202 transitions. [2022-12-14 06:34:43,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-12-14 06:34:43,494 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:34:43,494 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:34:43,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 06:34:43,494 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:34:43,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:34:43,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1399674065, now seen corresponding path program 1 times [2022-12-14 06:34:43,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:34:43,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062764071] [2022-12-14 06:34:43,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:34:43,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:34:43,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:34:43,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:34:43,627 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:34:43,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062764071] [2022-12-14 06:34:43,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062764071] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:34:43,627 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:34:43,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:34:43,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140762317] [2022-12-14 06:34:43,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:34:43,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:34:43,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:34:43,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:34:43,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:34:43,630 INFO L87 Difference]: Start difference. First operand 148 states and 202 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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) [2022-12-14 06:34:43,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:34:43,707 INFO L93 Difference]: Finished difference Result 323 states and 459 transitions. [2022-12-14 06:34:43,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:34:43,708 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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 78 [2022-12-14 06:34:43,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:34:43,709 INFO L225 Difference]: With dead ends: 323 [2022-12-14 06:34:43,710 INFO L226 Difference]: Without dead ends: 215 [2022-12-14 06:34:43,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:34:43,711 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 113 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:34:43,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 319 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:34:43,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2022-12-14 06:34:43,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 213. [2022-12-14 06:34:43,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 1.400943396226415) internal successors, (297), 212 states have internal predecessors, (297), 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) [2022-12-14 06:34:43,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 297 transitions. [2022-12-14 06:34:43,736 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 297 transitions. Word has length 78 [2022-12-14 06:34:43,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:34:43,736 INFO L495 AbstractCegarLoop]: Abstraction has 213 states and 297 transitions. [2022-12-14 06:34:43,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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) [2022-12-14 06:34:43,737 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 297 transitions. [2022-12-14 06:34:43,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-12-14 06:34:43,739 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:34:43,739 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:34:43,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 06:34:43,740 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:34:43,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:34:43,740 INFO L85 PathProgramCache]: Analyzing trace with hash 683865758, now seen corresponding path program 1 times [2022-12-14 06:34:43,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:34:43,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018255899] [2022-12-14 06:34:43,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:34:43,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:34:43,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:34:43,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:34:43,833 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:34:43,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018255899] [2022-12-14 06:34:43,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018255899] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:34:43,834 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:34:43,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:34:43,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533734656] [2022-12-14 06:34:43,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:34:43,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:34:43,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:34:43,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:34:43,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:34:43,836 INFO L87 Difference]: Start difference. First operand 213 states and 297 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 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) [2022-12-14 06:34:43,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:34:43,913 INFO L93 Difference]: Finished difference Result 496 states and 713 transitions. [2022-12-14 06:34:43,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:34:43,914 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 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 84 [2022-12-14 06:34:43,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:34:43,915 INFO L225 Difference]: With dead ends: 496 [2022-12-14 06:34:43,915 INFO L226 Difference]: Without dead ends: 329 [2022-12-14 06:34:43,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:34:43,917 INFO L413 NwaCegarLoop]: 220 mSDtfsCounter, 107 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:34:43,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 351 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:34:43,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2022-12-14 06:34:43,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 327. [2022-12-14 06:34:43,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 1.4202453987730062) internal successors, (463), 326 states have internal predecessors, (463), 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) [2022-12-14 06:34:43,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 463 transitions. [2022-12-14 06:34:43,954 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 463 transitions. Word has length 84 [2022-12-14 06:34:43,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:34:43,955 INFO L495 AbstractCegarLoop]: Abstraction has 327 states and 463 transitions. [2022-12-14 06:34:43,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 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) [2022-12-14 06:34:43,955 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 463 transitions. [2022-12-14 06:34:43,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-12-14 06:34:43,957 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:34:43,958 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:34:43,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 06:34:43,958 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:34:43,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:34:43,959 INFO L85 PathProgramCache]: Analyzing trace with hash -813436813, now seen corresponding path program 1 times [2022-12-14 06:34:43,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:34:43,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760374814] [2022-12-14 06:34:43,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:34:43,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:34:43,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:34:44,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:34:44,044 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:34:44,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760374814] [2022-12-14 06:34:44,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760374814] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:34:44,045 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:34:44,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:34:44,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037249972] [2022-12-14 06:34:44,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:34:44,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:34:44,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:34:44,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:34:44,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:34:44,047 INFO L87 Difference]: Start difference. First operand 327 states and 463 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 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) [2022-12-14 06:34:44,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:34:44,133 INFO L93 Difference]: Finished difference Result 800 states and 1156 transitions. [2022-12-14 06:34:44,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:34:44,134 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 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 90 [2022-12-14 06:34:44,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:34:44,137 INFO L225 Difference]: With dead ends: 800 [2022-12-14 06:34:44,137 INFO L226 Difference]: Without dead ends: 525 [2022-12-14 06:34:44,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:34:44,140 INFO L413 NwaCegarLoop]: 212 mSDtfsCounter, 101 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:34:44,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 339 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:34:44,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2022-12-14 06:34:44,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 523. [2022-12-14 06:34:44,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 522 states have (on average 1.4291187739463602) internal successors, (746), 522 states have internal predecessors, (746), 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) [2022-12-14 06:34:44,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 746 transitions. [2022-12-14 06:34:44,198 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 746 transitions. Word has length 90 [2022-12-14 06:34:44,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:34:44,199 INFO L495 AbstractCegarLoop]: Abstraction has 523 states and 746 transitions. [2022-12-14 06:34:44,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 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) [2022-12-14 06:34:44,199 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 746 transitions. [2022-12-14 06:34:44,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-12-14 06:34:44,201 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:34:44,201 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:34:44,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 06:34:44,201 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:34:44,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:34:44,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1692409732, now seen corresponding path program 1 times [2022-12-14 06:34:44,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:34:44,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834152017] [2022-12-14 06:34:44,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:34:44,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:34:44,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:34:44,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:34:44,282 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:34:44,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834152017] [2022-12-14 06:34:44,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834152017] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:34:44,282 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:34:44,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:34:44,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204502368] [2022-12-14 06:34:44,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:34:44,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:34:44,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:34:44,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:34:44,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:34:44,284 INFO L87 Difference]: Start difference. First operand 523 states and 746 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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) [2022-12-14 06:34:44,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:34:44,428 INFO L93 Difference]: Finished difference Result 1318 states and 1902 transitions. [2022-12-14 06:34:44,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:34:44,429 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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 96 [2022-12-14 06:34:44,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:34:44,432 INFO L225 Difference]: With dead ends: 1318 [2022-12-14 06:34:44,432 INFO L226 Difference]: Without dead ends: 853 [2022-12-14 06:34:44,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:34:44,435 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 95 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:34:44,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 327 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:34:44,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 853 states. [2022-12-14 06:34:44,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 853 to 851. [2022-12-14 06:34:44,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 851 states, 850 states have (on average 1.4270588235294117) internal successors, (1213), 850 states have internal predecessors, (1213), 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) [2022-12-14 06:34:44,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 851 states to 851 states and 1213 transitions. [2022-12-14 06:34:44,507 INFO L78 Accepts]: Start accepts. Automaton has 851 states and 1213 transitions. Word has length 96 [2022-12-14 06:34:44,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:34:44,507 INFO L495 AbstractCegarLoop]: Abstraction has 851 states and 1213 transitions. [2022-12-14 06:34:44,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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) [2022-12-14 06:34:44,508 INFO L276 IsEmpty]: Start isEmpty. Operand 851 states and 1213 transitions. [2022-12-14 06:34:44,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-12-14 06:34:44,510 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:34:44,510 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:34:44,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 06:34:44,511 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:34:44,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:34:44,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1089485247, now seen corresponding path program 1 times [2022-12-14 06:34:44,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:34:44,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453670136] [2022-12-14 06:34:44,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:34:44,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:34:44,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:34:44,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:34:44,577 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:34:44,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453670136] [2022-12-14 06:34:44,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453670136] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:34:44,578 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:34:44,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:34:44,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955984219] [2022-12-14 06:34:44,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:34:44,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:34:44,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:34:44,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:34:44,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:34:44,579 INFO L87 Difference]: Start difference. First operand 851 states and 1213 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 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) [2022-12-14 06:34:44,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:34:44,742 INFO L93 Difference]: Finished difference Result 2168 states and 3104 transitions. [2022-12-14 06:34:44,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:34:44,743 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 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 102 [2022-12-14 06:34:44,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:34:44,748 INFO L225 Difference]: With dead ends: 2168 [2022-12-14 06:34:44,749 INFO L226 Difference]: Without dead ends: 1381 [2022-12-14 06:34:44,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:34:44,751 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 89 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:34:44,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 303 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:34:44,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1381 states. [2022-12-14 06:34:44,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1381 to 1379. [2022-12-14 06:34:44,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1379 states, 1378 states have (on average 1.413642960812772) internal successors, (1948), 1378 states have internal predecessors, (1948), 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) [2022-12-14 06:34:44,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1379 states to 1379 states and 1948 transitions. [2022-12-14 06:34:44,863 INFO L78 Accepts]: Start accepts. Automaton has 1379 states and 1948 transitions. Word has length 102 [2022-12-14 06:34:44,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:34:44,864 INFO L495 AbstractCegarLoop]: Abstraction has 1379 states and 1948 transitions. [2022-12-14 06:34:44,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 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) [2022-12-14 06:34:44,864 INFO L276 IsEmpty]: Start isEmpty. Operand 1379 states and 1948 transitions. [2022-12-14 06:34:44,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-12-14 06:34:44,866 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:34:44,866 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:34:44,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 06:34:44,866 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:34:44,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:34:44,867 INFO L85 PathProgramCache]: Analyzing trace with hash 293254303, now seen corresponding path program 1 times [2022-12-14 06:34:44,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:34:44,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033464989] [2022-12-14 06:34:44,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:34:44,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:34:44,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:34:44,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:34:44,985 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:34:44,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033464989] [2022-12-14 06:34:44,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033464989] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:34:44,985 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:34:44,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 06:34:44,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731571230] [2022-12-14 06:34:44,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:34:44,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 06:34:44,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:34:44,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 06:34:44,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 06:34:44,987 INFO L87 Difference]: Start difference. First operand 1379 states and 1948 transitions. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 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) [2022-12-14 06:34:45,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:34:45,666 INFO L93 Difference]: Finished difference Result 4780 states and 6723 transitions. [2022-12-14 06:34:45,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 06:34:45,667 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 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 108 [2022-12-14 06:34:45,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:34:45,679 INFO L225 Difference]: With dead ends: 4780 [2022-12-14 06:34:45,679 INFO L226 Difference]: Without dead ends: 3470 [2022-12-14 06:34:45,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-12-14 06:34:45,682 INFO L413 NwaCegarLoop]: 745 mSDtfsCounter, 838 mSDsluCounter, 1705 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 838 SdHoareTripleChecker+Valid, 2450 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 06:34:45,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [838 Valid, 2450 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 06:34:45,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3470 states. [2022-12-14 06:34:45,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3470 to 1852. [2022-12-14 06:34:45,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1852 states, 1851 states have (on average 1.375472717450027) internal successors, (2546), 1851 states have internal predecessors, (2546), 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) [2022-12-14 06:34:45,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1852 states to 1852 states and 2546 transitions. [2022-12-14 06:34:45,956 INFO L78 Accepts]: Start accepts. Automaton has 1852 states and 2546 transitions. Word has length 108 [2022-12-14 06:34:45,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:34:45,956 INFO L495 AbstractCegarLoop]: Abstraction has 1852 states and 2546 transitions. [2022-12-14 06:34:45,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 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) [2022-12-14 06:34:45,957 INFO L276 IsEmpty]: Start isEmpty. Operand 1852 states and 2546 transitions. [2022-12-14 06:34:45,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-12-14 06:34:45,960 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:34:45,960 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:34:45,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 06:34:45,961 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:34:45,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:34:45,961 INFO L85 PathProgramCache]: Analyzing trace with hash 476870725, now seen corresponding path program 1 times [2022-12-14 06:34:45,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:34:45,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294741739] [2022-12-14 06:34:45,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:34:45,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:34:45,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:34:46,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:34:46,038 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:34:46,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294741739] [2022-12-14 06:34:46,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294741739] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:34:46,039 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:34:46,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:34:46,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614472752] [2022-12-14 06:34:46,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:34:46,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:34:46,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:34:46,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:34:46,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:34:46,040 INFO L87 Difference]: Start difference. First operand 1852 states and 2546 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 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) [2022-12-14 06:34:46,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:34:46,321 INFO L93 Difference]: Finished difference Result 4371 states and 6065 transitions. [2022-12-14 06:34:46,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:34:46,321 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 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 110 [2022-12-14 06:34:46,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:34:46,337 INFO L225 Difference]: With dead ends: 4371 [2022-12-14 06:34:46,337 INFO L226 Difference]: Without dead ends: 2587 [2022-12-14 06:34:46,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:34:46,341 INFO L413 NwaCegarLoop]: 271 mSDtfsCounter, 130 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:34:46,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 360 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:34:46,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2587 states. [2022-12-14 06:34:46,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2587 to 2585. [2022-12-14 06:34:46,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2585 states, 2584 states have (on average 1.3792569659442724) internal successors, (3564), 2584 states have internal predecessors, (3564), 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) [2022-12-14 06:34:46,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2585 states to 2585 states and 3564 transitions. [2022-12-14 06:34:46,612 INFO L78 Accepts]: Start accepts. Automaton has 2585 states and 3564 transitions. Word has length 110 [2022-12-14 06:34:46,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:34:46,612 INFO L495 AbstractCegarLoop]: Abstraction has 2585 states and 3564 transitions. [2022-12-14 06:34:46,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 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) [2022-12-14 06:34:46,613 INFO L276 IsEmpty]: Start isEmpty. Operand 2585 states and 3564 transitions. [2022-12-14 06:34:46,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-12-14 06:34:46,618 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:34:46,618 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:34:46,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 06:34:46,618 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:34:46,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:34:46,619 INFO L85 PathProgramCache]: Analyzing trace with hash -735617500, now seen corresponding path program 1 times [2022-12-14 06:34:46,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:34:46,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442472450] [2022-12-14 06:34:46,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:34:46,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:34:46,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:34:46,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:34:46,846 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:34:46,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442472450] [2022-12-14 06:34:46,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442472450] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:34:46,847 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:34:46,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 06:34:46,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810574109] [2022-12-14 06:34:46,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:34:46,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 06:34:46,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:34:46,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 06:34:46,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 06:34:46,848 INFO L87 Difference]: Start difference. First operand 2585 states and 3564 transitions. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 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) [2022-12-14 06:34:47,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:34:47,320 INFO L93 Difference]: Finished difference Result 5103 states and 7049 transitions. [2022-12-14 06:34:47,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 06:34:47,320 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 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 110 [2022-12-14 06:34:47,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:34:47,335 INFO L225 Difference]: With dead ends: 5103 [2022-12-14 06:34:47,336 INFO L226 Difference]: Without dead ends: 2587 [2022-12-14 06:34:47,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2022-12-14 06:34:47,340 INFO L413 NwaCegarLoop]: 263 mSDtfsCounter, 599 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 599 SdHoareTripleChecker+Valid, 640 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:34:47,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [599 Valid, 640 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:34:47,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2587 states. [2022-12-14 06:34:47,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2587 to 2585. [2022-12-14 06:34:47,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2585 states, 2584 states have (on average 1.3777089783281733) internal successors, (3560), 2584 states have internal predecessors, (3560), 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) [2022-12-14 06:34:47,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2585 states to 2585 states and 3560 transitions. [2022-12-14 06:34:47,697 INFO L78 Accepts]: Start accepts. Automaton has 2585 states and 3560 transitions. Word has length 110 [2022-12-14 06:34:47,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:34:47,697 INFO L495 AbstractCegarLoop]: Abstraction has 2585 states and 3560 transitions. [2022-12-14 06:34:47,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 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) [2022-12-14 06:34:47,697 INFO L276 IsEmpty]: Start isEmpty. Operand 2585 states and 3560 transitions. [2022-12-14 06:34:47,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-12-14 06:34:47,702 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:34:47,702 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:34:47,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 06:34:47,703 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:34:47,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:34:47,703 INFO L85 PathProgramCache]: Analyzing trace with hash -770799408, now seen corresponding path program 1 times [2022-12-14 06:34:47,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:34:47,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926326349] [2022-12-14 06:34:47,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:34:47,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:34:47,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:34:47,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:34:47,831 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:34:47,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926326349] [2022-12-14 06:34:47,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926326349] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:34:47,832 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:34:47,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 06:34:47,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240258122] [2022-12-14 06:34:47,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:34:47,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 06:34:47,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:34:47,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 06:34:47,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:34:47,833 INFO L87 Difference]: Start difference. First operand 2585 states and 3560 transitions. Second operand has 5 states, 5 states have (on average 22.2) internal successors, (111), 4 states have internal predecessors, (111), 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) [2022-12-14 06:34:48,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:34:48,353 INFO L93 Difference]: Finished difference Result 5134 states and 7081 transitions. [2022-12-14 06:34:48,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 06:34:48,354 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.2) internal successors, (111), 4 states have internal predecessors, (111), 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 111 [2022-12-14 06:34:48,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:34:48,369 INFO L225 Difference]: With dead ends: 5134 [2022-12-14 06:34:48,369 INFO L226 Difference]: Without dead ends: 2587 [2022-12-14 06:34:48,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 06:34:48,374 INFO L413 NwaCegarLoop]: 145 mSDtfsCounter, 531 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 531 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 06:34:48,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [531 Valid, 197 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 06:34:48,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2587 states. [2022-12-14 06:34:48,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2587 to 2585. [2022-12-14 06:34:48,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2585 states, 2584 states have (on average 1.3645510835913313) internal successors, (3526), 2584 states have internal predecessors, (3526), 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) [2022-12-14 06:34:48,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2585 states to 2585 states and 3526 transitions. [2022-12-14 06:34:48,638 INFO L78 Accepts]: Start accepts. Automaton has 2585 states and 3526 transitions. Word has length 111 [2022-12-14 06:34:48,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:34:48,638 INFO L495 AbstractCegarLoop]: Abstraction has 2585 states and 3526 transitions. [2022-12-14 06:34:48,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.2) internal successors, (111), 4 states have internal predecessors, (111), 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) [2022-12-14 06:34:48,638 INFO L276 IsEmpty]: Start isEmpty. Operand 2585 states and 3526 transitions. [2022-12-14 06:34:48,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-12-14 06:34:48,641 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:34:48,641 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:34:48,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 06:34:48,642 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:34:48,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:34:48,642 INFO L85 PathProgramCache]: Analyzing trace with hash -188884282, now seen corresponding path program 1 times [2022-12-14 06:34:48,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:34:48,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897610330] [2022-12-14 06:34:48,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:34:48,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:34:48,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:34:48,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:34:48,736 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:34:48,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897610330] [2022-12-14 06:34:48,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897610330] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:34:48,736 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:34:48,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 06:34:48,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519650565] [2022-12-14 06:34:48,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:34:48,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 06:34:48,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:34:48,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 06:34:48,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:34:48,738 INFO L87 Difference]: Start difference. First operand 2585 states and 3526 transitions. Second operand has 5 states, 5 states have (on average 22.2) internal successors, (111), 4 states have internal predecessors, (111), 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) [2022-12-14 06:34:49,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:34:49,121 INFO L93 Difference]: Finished difference Result 5120 states and 6997 transitions. [2022-12-14 06:34:49,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 06:34:49,121 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.2) internal successors, (111), 4 states have internal predecessors, (111), 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 111 [2022-12-14 06:34:49,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:34:49,134 INFO L225 Difference]: With dead ends: 5120 [2022-12-14 06:34:49,135 INFO L226 Difference]: Without dead ends: 2585 [2022-12-14 06:34:49,143 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 06:34:49,143 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 497 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 497 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:34:49,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [497 Valid, 119 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:34:49,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2585 states. [2022-12-14 06:34:49,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2585 to 2585. [2022-12-14 06:34:49,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2585 states, 2584 states have (on average 1.3502321981424148) internal successors, (3489), 2584 states have internal predecessors, (3489), 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) [2022-12-14 06:34:49,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2585 states to 2585 states and 3489 transitions. [2022-12-14 06:34:49,427 INFO L78 Accepts]: Start accepts. Automaton has 2585 states and 3489 transitions. Word has length 111 [2022-12-14 06:34:49,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:34:49,427 INFO L495 AbstractCegarLoop]: Abstraction has 2585 states and 3489 transitions. [2022-12-14 06:34:49,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.2) internal successors, (111), 4 states have internal predecessors, (111), 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) [2022-12-14 06:34:49,427 INFO L276 IsEmpty]: Start isEmpty. Operand 2585 states and 3489 transitions. [2022-12-14 06:34:49,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-12-14 06:34:49,431 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:34:49,431 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:34:49,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 06:34:49,431 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:34:49,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:34:49,431 INFO L85 PathProgramCache]: Analyzing trace with hash 2141016316, now seen corresponding path program 1 times [2022-12-14 06:34:49,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:34:49,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280775724] [2022-12-14 06:34:49,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:34:49,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:34:49,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:34:49,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:34:49,548 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:34:49,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280775724] [2022-12-14 06:34:49,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280775724] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:34:49,548 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:34:49,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 06:34:49,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752716405] [2022-12-14 06:34:49,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:34:49,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 06:34:49,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:34:49,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 06:34:49,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:34:49,549 INFO L87 Difference]: Start difference. First operand 2585 states and 3489 transitions. Second operand has 5 states, 5 states have (on average 22.2) internal successors, (111), 4 states have internal predecessors, (111), 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) [2022-12-14 06:34:49,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:34:49,991 INFO L93 Difference]: Finished difference Result 5126 states and 6931 transitions. [2022-12-14 06:34:49,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 06:34:49,992 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.2) internal successors, (111), 4 states have internal predecessors, (111), 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 111 [2022-12-14 06:34:49,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:34:49,998 INFO L225 Difference]: With dead ends: 5126 [2022-12-14 06:34:49,998 INFO L226 Difference]: Without dead ends: 2585 [2022-12-14 06:34:50,000 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 06:34:50,000 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 501 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 501 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:34:50,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [501 Valid, 111 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:34:50,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2585 states. [2022-12-14 06:34:50,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2585 to 2585. [2022-12-14 06:34:50,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2585 states, 2584 states have (on average 1.33359133126935) internal successors, (3446), 2584 states have internal predecessors, (3446), 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) [2022-12-14 06:34:50,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2585 states to 2585 states and 3446 transitions. [2022-12-14 06:34:50,261 INFO L78 Accepts]: Start accepts. Automaton has 2585 states and 3446 transitions. Word has length 111 [2022-12-14 06:34:50,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:34:50,262 INFO L495 AbstractCegarLoop]: Abstraction has 2585 states and 3446 transitions. [2022-12-14 06:34:50,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.2) internal successors, (111), 4 states have internal predecessors, (111), 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) [2022-12-14 06:34:50,262 INFO L276 IsEmpty]: Start isEmpty. Operand 2585 states and 3446 transitions. [2022-12-14 06:34:50,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-12-14 06:34:50,264 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:34:50,264 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:34:50,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-14 06:34:50,264 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:34:50,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:34:50,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1712311585, now seen corresponding path program 1 times [2022-12-14 06:34:50,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:34:50,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624907384] [2022-12-14 06:34:50,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:34:50,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:34:50,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:34:50,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:34:50,349 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:34:50,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624907384] [2022-12-14 06:34:50,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624907384] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:34:50,349 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:34:50,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 06:34:50,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619276322] [2022-12-14 06:34:50,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:34:50,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 06:34:50,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:34:50,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 06:34:50,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:34:50,351 INFO L87 Difference]: Start difference. First operand 2585 states and 3446 transitions. Second operand has 5 states, 5 states have (on average 22.2) internal successors, (111), 4 states have internal predecessors, (111), 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) [2022-12-14 06:34:50,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:34:50,882 INFO L93 Difference]: Finished difference Result 5114 states and 6831 transitions. [2022-12-14 06:34:50,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 06:34:50,883 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.2) internal successors, (111), 4 states have internal predecessors, (111), 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 111 [2022-12-14 06:34:50,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:34:50,887 INFO L225 Difference]: With dead ends: 5114 [2022-12-14 06:34:50,887 INFO L226 Difference]: Without dead ends: 2585 [2022-12-14 06:34:50,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 06:34:50,889 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 466 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 466 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:34:50,889 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [466 Valid, 127 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:34:50,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2585 states. [2022-12-14 06:34:51,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2585 to 2585. [2022-12-14 06:34:51,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2585 states, 2584 states have (on average 1.3192724458204335) internal successors, (3409), 2584 states have internal predecessors, (3409), 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) [2022-12-14 06:34:51,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2585 states to 2585 states and 3409 transitions. [2022-12-14 06:34:51,172 INFO L78 Accepts]: Start accepts. Automaton has 2585 states and 3409 transitions. Word has length 111 [2022-12-14 06:34:51,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:34:51,173 INFO L495 AbstractCegarLoop]: Abstraction has 2585 states and 3409 transitions. [2022-12-14 06:34:51,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.2) internal successors, (111), 4 states have internal predecessors, (111), 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) [2022-12-14 06:34:51,173 INFO L276 IsEmpty]: Start isEmpty. Operand 2585 states and 3409 transitions. [2022-12-14 06:34:51,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-12-14 06:34:51,175 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:34:51,175 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:34:51,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-14 06:34:51,175 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:34:51,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:34:51,175 INFO L85 PathProgramCache]: Analyzing trace with hash -958345941, now seen corresponding path program 1 times [2022-12-14 06:34:51,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:34:51,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704099778] [2022-12-14 06:34:51,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:34:51,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:34:51,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:34:51,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:34:51,270 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:34:51,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704099778] [2022-12-14 06:34:51,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704099778] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:34:51,270 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:34:51,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:34:51,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127662312] [2022-12-14 06:34:51,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:34:51,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:34:51,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:34:51,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:34:51,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:34:51,271 INFO L87 Difference]: Start difference. First operand 2585 states and 3409 transitions. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 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) [2022-12-14 06:34:51,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:34:51,570 INFO L93 Difference]: Finished difference Result 3865 states and 5119 transitions. [2022-12-14 06:34:51,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:34:51,571 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 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 111 [2022-12-14 06:34:51,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:34:51,579 INFO L225 Difference]: With dead ends: 3865 [2022-12-14 06:34:51,579 INFO L226 Difference]: Without dead ends: 1603 [2022-12-14 06:34:51,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:34:51,583 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 56 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:34:51,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 292 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:34:51,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1603 states. [2022-12-14 06:34:51,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1603 to 1505. [2022-12-14 06:34:51,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1505 states, 1504 states have (on average 1.3164893617021276) internal successors, (1980), 1504 states have internal predecessors, (1980), 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) [2022-12-14 06:34:51,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1505 states to 1505 states and 1980 transitions. [2022-12-14 06:34:51,745 INFO L78 Accepts]: Start accepts. Automaton has 1505 states and 1980 transitions. Word has length 111 [2022-12-14 06:34:51,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:34:51,745 INFO L495 AbstractCegarLoop]: Abstraction has 1505 states and 1980 transitions. [2022-12-14 06:34:51,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 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) [2022-12-14 06:34:51,745 INFO L276 IsEmpty]: Start isEmpty. Operand 1505 states and 1980 transitions. [2022-12-14 06:34:51,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-12-14 06:34:51,747 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:34:51,747 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:34:51,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-14 06:34:51,748 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:34:51,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:34:51,748 INFO L85 PathProgramCache]: Analyzing trace with hash -911826555, now seen corresponding path program 1 times [2022-12-14 06:34:51,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:34:51,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724825876] [2022-12-14 06:34:51,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:34:51,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:34:51,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:34:51,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:34:51,836 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:34:51,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724825876] [2022-12-14 06:34:51,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724825876] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:34:51,837 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:34:51,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:34:51,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494490415] [2022-12-14 06:34:51,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:34:51,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:34:51,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:34:51,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:34:51,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:34:51,837 INFO L87 Difference]: Start difference. First operand 1505 states and 1980 transitions. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 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) [2022-12-14 06:34:52,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:34:52,002 INFO L93 Difference]: Finished difference Result 2103 states and 2769 transitions. [2022-12-14 06:34:52,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:34:52,002 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 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 111 [2022-12-14 06:34:52,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:34:52,004 INFO L225 Difference]: With dead ends: 2103 [2022-12-14 06:34:52,004 INFO L226 Difference]: Without dead ends: 809 [2022-12-14 06:34:52,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:34:52,006 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 58 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:34:52,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 307 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:34:52,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 809 states. [2022-12-14 06:34:52,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 809 to 807. [2022-12-14 06:34:52,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 807 states, 806 states have (on average 1.284119106699752) internal successors, (1035), 806 states have internal predecessors, (1035), 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) [2022-12-14 06:34:52,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 1035 transitions. [2022-12-14 06:34:52,095 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 1035 transitions. Word has length 111 [2022-12-14 06:34:52,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:34:52,096 INFO L495 AbstractCegarLoop]: Abstraction has 807 states and 1035 transitions. [2022-12-14 06:34:52,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 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) [2022-12-14 06:34:52,096 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 1035 transitions. [2022-12-14 06:34:52,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-12-14 06:34:52,096 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:34:52,096 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:34:52,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-14 06:34:52,097 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:34:52,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:34:52,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1119539352, now seen corresponding path program 1 times [2022-12-14 06:34:52,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:34:52,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503605350] [2022-12-14 06:34:52,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:34:52,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:34:52,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:34:52,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:34:52,479 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:34:52,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503605350] [2022-12-14 06:34:52,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503605350] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:34:52,479 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:34:52,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 06:34:52,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329910271] [2022-12-14 06:34:52,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:34:52,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 06:34:52,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:34:52,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 06:34:52,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-12-14 06:34:52,481 INFO L87 Difference]: Start difference. First operand 807 states and 1035 transitions. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 8 states have internal predecessors, (111), 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) [2022-12-14 06:34:52,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:34:52,738 INFO L93 Difference]: Finished difference Result 1552 states and 2002 transitions. [2022-12-14 06:34:52,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 06:34:52,738 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 8 states have internal predecessors, (111), 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 111 [2022-12-14 06:34:52,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:34:52,741 INFO L225 Difference]: With dead ends: 1552 [2022-12-14 06:34:52,741 INFO L226 Difference]: Without dead ends: 807 [2022-12-14 06:34:52,742 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-12-14 06:34:52,742 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 763 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 763 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:34:52,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [763 Valid, 144 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:34:52,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2022-12-14 06:34:52,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 807. [2022-12-14 06:34:52,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 807 states, 806 states have (on average 1.271712158808933) internal successors, (1025), 806 states have internal predecessors, (1025), 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) [2022-12-14 06:34:52,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 1025 transitions. [2022-12-14 06:34:52,858 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 1025 transitions. Word has length 111 [2022-12-14 06:34:52,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:34:52,858 INFO L495 AbstractCegarLoop]: Abstraction has 807 states and 1025 transitions. [2022-12-14 06:34:52,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 8 states have internal predecessors, (111), 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) [2022-12-14 06:34:52,859 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 1025 transitions. [2022-12-14 06:34:52,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-12-14 06:34:52,860 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:34:52,860 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:34:52,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-14 06:34:52,860 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:34:52,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:34:52,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1901559939, now seen corresponding path program 1 times [2022-12-14 06:34:52,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:34:52,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188290143] [2022-12-14 06:34:52,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:34:52,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:34:52,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:34:53,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:34:53,253 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:34:53,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188290143] [2022-12-14 06:34:53,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188290143] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:34:53,253 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:34:53,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 06:34:53,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235053062] [2022-12-14 06:34:53,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:34:53,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 06:34:53,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:34:53,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 06:34:53,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-12-14 06:34:53,255 INFO L87 Difference]: Start difference. First operand 807 states and 1025 transitions. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 8 states have internal predecessors, (111), 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) [2022-12-14 06:34:53,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:34:53,560 INFO L93 Difference]: Finished difference Result 1403 states and 1796 transitions. [2022-12-14 06:34:53,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 06:34:53,561 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 8 states have internal predecessors, (111), 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 111 [2022-12-14 06:34:53,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:34:53,563 INFO L225 Difference]: With dead ends: 1403 [2022-12-14 06:34:53,563 INFO L226 Difference]: Without dead ends: 807 [2022-12-14 06:34:53,564 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2022-12-14 06:34:53,564 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 418 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:34:53,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [418 Valid, 232 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:34:53,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2022-12-14 06:34:53,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 807. [2022-12-14 06:34:53,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 807 states, 806 states have (on average 1.251861042183623) internal successors, (1009), 806 states have internal predecessors, (1009), 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) [2022-12-14 06:34:53,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 1009 transitions. [2022-12-14 06:34:53,674 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 1009 transitions. Word has length 111 [2022-12-14 06:34:53,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:34:53,675 INFO L495 AbstractCegarLoop]: Abstraction has 807 states and 1009 transitions. [2022-12-14 06:34:53,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 8 states have internal predecessors, (111), 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) [2022-12-14 06:34:53,675 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 1009 transitions. [2022-12-14 06:34:53,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-12-14 06:34:53,675 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:34:53,675 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:34:53,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-14 06:34:53,676 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:34:53,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:34:53,676 INFO L85 PathProgramCache]: Analyzing trace with hash -574174750, now seen corresponding path program 1 times [2022-12-14 06:34:53,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:34:53,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618701396] [2022-12-14 06:34:53,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:34:53,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:34:53,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:34:53,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:34:53,944 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:34:53,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618701396] [2022-12-14 06:34:53,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618701396] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:34:53,944 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:34:53,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 06:34:53,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108405467] [2022-12-14 06:34:53,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:34:53,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 06:34:53,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:34:53,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 06:34:53,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 06:34:53,945 INFO L87 Difference]: Start difference. First operand 807 states and 1009 transitions. Second operand has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 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) [2022-12-14 06:34:54,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:34:54,119 INFO L93 Difference]: Finished difference Result 1419 states and 1780 transitions. [2022-12-14 06:34:54,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 06:34:54,119 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 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 111 [2022-12-14 06:34:54,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:34:54,121 INFO L225 Difference]: With dead ends: 1419 [2022-12-14 06:34:54,121 INFO L226 Difference]: Without dead ends: 807 [2022-12-14 06:34:54,122 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 [2022-12-14 06:34:54,122 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 1 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:34:54,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 460 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:34:54,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2022-12-14 06:34:54,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 807. [2022-12-14 06:34:54,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 807 states, 806 states have (on average 1.2320099255583126) internal successors, (993), 806 states have internal predecessors, (993), 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) [2022-12-14 06:34:54,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 993 transitions. [2022-12-14 06:34:54,232 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 993 transitions. Word has length 111 [2022-12-14 06:34:54,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:34:54,232 INFO L495 AbstractCegarLoop]: Abstraction has 807 states and 993 transitions. [2022-12-14 06:34:54,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 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) [2022-12-14 06:34:54,233 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 993 transitions. [2022-12-14 06:34:54,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-12-14 06:34:54,233 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:34:54,233 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:34:54,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-12-14 06:34:54,234 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:34:54,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:34:54,234 INFO L85 PathProgramCache]: Analyzing trace with hash 529890820, now seen corresponding path program 1 times [2022-12-14 06:34:54,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:34:54,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062421979] [2022-12-14 06:34:54,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:34:54,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:34:54,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:34:54,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:34:54,276 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:34:54,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062421979] [2022-12-14 06:34:54,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062421979] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:34:54,276 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:34:54,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:34:54,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75130575] [2022-12-14 06:34:54,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:34:54,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:34:54,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:34:54,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:34:54,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:34:54,278 INFO L87 Difference]: Start difference. First operand 807 states and 993 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 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) [2022-12-14 06:34:54,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:34:54,457 INFO L93 Difference]: Finished difference Result 1411 states and 1756 transitions. [2022-12-14 06:34:54,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:34:54,458 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 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 113 [2022-12-14 06:34:54,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:34:54,459 INFO L225 Difference]: With dead ends: 1411 [2022-12-14 06:34:54,459 INFO L226 Difference]: Without dead ends: 775 [2022-12-14 06:34:54,459 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:34:54,460 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 0 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:34:54,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 299 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:34:54,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2022-12-14 06:34:54,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 775. [2022-12-14 06:34:54,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 775 states, 774 states have (on average 1.2093023255813953) internal successors, (936), 774 states have internal predecessors, (936), 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) [2022-12-14 06:34:54,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 936 transitions. [2022-12-14 06:34:54,564 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 936 transitions. Word has length 113 [2022-12-14 06:34:54,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:34:54,564 INFO L495 AbstractCegarLoop]: Abstraction has 775 states and 936 transitions. [2022-12-14 06:34:54,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 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) [2022-12-14 06:34:54,564 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 936 transitions. [2022-12-14 06:34:54,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-12-14 06:34:54,565 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:34:54,565 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:34:54,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-12-14 06:34:54,565 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:34:54,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:34:54,565 INFO L85 PathProgramCache]: Analyzing trace with hash -952627285, now seen corresponding path program 1 times [2022-12-14 06:34:54,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:34:54,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662284022] [2022-12-14 06:34:54,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:34:54,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:34:54,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:34:54,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:34:54,633 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:34:54,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662284022] [2022-12-14 06:34:54,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662284022] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:34:54,633 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:34:54,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:34:54,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967423922] [2022-12-14 06:34:54,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:34:54,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:34:54,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:34:54,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:34:54,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:34:54,635 INFO L87 Difference]: Start difference. First operand 775 states and 936 transitions. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 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) [2022-12-14 06:34:54,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:34:54,766 INFO L93 Difference]: Finished difference Result 1079 states and 1310 transitions. [2022-12-14 06:34:54,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:34:54,766 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 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 114 [2022-12-14 06:34:54,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:34:54,767 INFO L225 Difference]: With dead ends: 1079 [2022-12-14 06:34:54,767 INFO L226 Difference]: Without dead ends: 439 [2022-12-14 06:34:54,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:34:54,768 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 52 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:34:54,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 268 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:34:54,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2022-12-14 06:34:54,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 437. [2022-12-14 06:34:54,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 436 states have (on average 1.1811926605504588) internal successors, (515), 436 states have internal predecessors, (515), 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) [2022-12-14 06:34:54,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 515 transitions. [2022-12-14 06:34:54,883 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 515 transitions. Word has length 114 [2022-12-14 06:34:54,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:34:54,884 INFO L495 AbstractCegarLoop]: Abstraction has 437 states and 515 transitions. [2022-12-14 06:34:54,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 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) [2022-12-14 06:34:54,884 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 515 transitions. [2022-12-14 06:34:54,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-12-14 06:34:54,885 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:34:54,885 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:34:54,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-12-14 06:34:54,885 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:34:54,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:34:54,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1295224097, now seen corresponding path program 1 times [2022-12-14 06:34:54,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:34:54,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238722854] [2022-12-14 06:34:54,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:34:54,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:34:54,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:34:54,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:34:54,953 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:34:54,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238722854] [2022-12-14 06:34:54,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238722854] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:34:54,954 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:34:54,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:34:54,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491708811] [2022-12-14 06:34:54,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:34:54,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:34:54,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:34:54,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:34:54,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:34:54,955 INFO L87 Difference]: Start difference. First operand 437 states and 515 transitions. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 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) [2022-12-14 06:34:55,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:34:55,042 INFO L93 Difference]: Finished difference Result 601 states and 712 transitions. [2022-12-14 06:34:55,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:34:55,042 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 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 114 [2022-12-14 06:34:55,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:34:55,043 INFO L225 Difference]: With dead ends: 601 [2022-12-14 06:34:55,043 INFO L226 Difference]: Without dead ends: 269 [2022-12-14 06:34:55,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:34:55,044 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 47 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:34:55,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 243 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:34:55,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-12-14 06:34:55,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 267. [2022-12-14 06:34:55,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 1.150375939849624) internal successors, (306), 266 states have internal predecessors, (306), 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) [2022-12-14 06:34:55,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 306 transitions. [2022-12-14 06:34:55,080 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 306 transitions. Word has length 114 [2022-12-14 06:34:55,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:34:55,080 INFO L495 AbstractCegarLoop]: Abstraction has 267 states and 306 transitions. [2022-12-14 06:34:55,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 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) [2022-12-14 06:34:55,080 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 306 transitions. [2022-12-14 06:34:55,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-12-14 06:34:55,081 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:34:55,081 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:34:55,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-12-14 06:34:55,081 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:34:55,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:34:55,081 INFO L85 PathProgramCache]: Analyzing trace with hash 324484402, now seen corresponding path program 1 times [2022-12-14 06:34:55,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:34:55,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034902078] [2022-12-14 06:34:55,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:34:55,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:34:55,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:34:55,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:34:55,146 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:34:55,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034902078] [2022-12-14 06:34:55,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034902078] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:34:55,147 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:34:55,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:34:55,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783832185] [2022-12-14 06:34:55,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:34:55,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:34:55,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:34:55,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:34:55,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:34:55,148 INFO L87 Difference]: Start difference. First operand 267 states and 306 transitions. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 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) [2022-12-14 06:34:55,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:34:55,211 INFO L93 Difference]: Finished difference Result 364 states and 419 transitions. [2022-12-14 06:34:55,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:34:55,212 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 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 114 [2022-12-14 06:34:55,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:34:55,212 INFO L225 Difference]: With dead ends: 364 [2022-12-14 06:34:55,212 INFO L226 Difference]: Without dead ends: 185 [2022-12-14 06:34:55,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:34:55,213 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 42 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:34:55,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 220 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:34:55,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-12-14 06:34:55,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 183. [2022-12-14 06:34:55,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 1.120879120879121) internal successors, (204), 182 states have internal predecessors, (204), 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) [2022-12-14 06:34:55,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 204 transitions. [2022-12-14 06:34:55,238 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 204 transitions. Word has length 114 [2022-12-14 06:34:55,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:34:55,238 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 204 transitions. [2022-12-14 06:34:55,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 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) [2022-12-14 06:34:55,238 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 204 transitions. [2022-12-14 06:34:55,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-12-14 06:34:55,238 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:34:55,238 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:34:55,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-12-14 06:34:55,239 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:34:55,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:34:55,239 INFO L85 PathProgramCache]: Analyzing trace with hash -262329019, now seen corresponding path program 1 times [2022-12-14 06:34:55,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:34:55,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334817943] [2022-12-14 06:34:55,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:34:55,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:34:55,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:34:55,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:34:55,391 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:34:55,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334817943] [2022-12-14 06:34:55,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334817943] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:34:55,391 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:34:55,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 06:34:55,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897770005] [2022-12-14 06:34:55,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:34:55,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 06:34:55,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:34:55,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 06:34:55,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:34:55,393 INFO L87 Difference]: Start difference. First operand 183 states and 204 transitions. Second operand has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 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) [2022-12-14 06:34:55,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:34:55,537 INFO L93 Difference]: Finished difference Result 242 states and 270 transitions. [2022-12-14 06:34:55,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 06:34:55,537 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 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 117 [2022-12-14 06:34:55,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:34:55,538 INFO L225 Difference]: With dead ends: 242 [2022-12-14 06:34:55,538 INFO L226 Difference]: Without dead ends: 240 [2022-12-14 06:34:55,539 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-12-14 06:34:55,539 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 215 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 627 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:34:55,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 627 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:34:55,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-12-14 06:34:55,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 185. [2022-12-14 06:34:55,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 1.1141304347826086) internal successors, (205), 184 states have internal predecessors, (205), 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) [2022-12-14 06:34:55,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 205 transitions. [2022-12-14 06:34:55,570 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 205 transitions. Word has length 117 [2022-12-14 06:34:55,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:34:55,570 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 205 transitions. [2022-12-14 06:34:55,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 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) [2022-12-14 06:34:55,570 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 205 transitions. [2022-12-14 06:34:55,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-12-14 06:34:55,570 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:34:55,570 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:34:55,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-12-14 06:34:55,571 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:34:55,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:34:55,571 INFO L85 PathProgramCache]: Analyzing trace with hash -933900194, now seen corresponding path program 1 times [2022-12-14 06:34:55,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:34:55,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669487894] [2022-12-14 06:34:55,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:34:55,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:34:55,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:35:36,644 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:35:36,644 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:35:36,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669487894] [2022-12-14 06:35:36,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669487894] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:35:36,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619506130] [2022-12-14 06:35:36,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:35:36,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:35:36,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a512628-4774-4525-9af1-a3b3a89e0f0b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:35:36,646 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a512628-4774-4525-9af1-a3b3a89e0f0b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:35:36,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a512628-4774-4525-9af1-a3b3a89e0f0b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 06:35:36,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:35:36,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 603 conjuncts, 133 conjunts are in the unsatisfiable core [2022-12-14 06:35:36,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:40:08,942 WARN L233 SmtUtils]: Spent 2.86m on a formula simplification. DAG size of input: 186 DAG size of output: 161 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 06:40:41,526 WARN L233 SmtUtils]: Spent 24.18s on a formula simplification. DAG size of input: 120 DAG size of output: 120 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 06:40:45,573 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:40:45,573 INFO L328 TraceCheckSpWp]: Computing backward predicates...