./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/openssl/s3_srvr.blast.09.i.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878355a6-7a0f-48ca-9351-2fbaed5ce3cc/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878355a6-7a0f-48ca-9351-2fbaed5ce3cc/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878355a6-7a0f-48ca-9351-2fbaed5ce3cc/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878355a6-7a0f-48ca-9351-2fbaed5ce3cc/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.09.i.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878355a6-7a0f-48ca-9351-2fbaed5ce3cc/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878355a6-7a0f-48ca-9351-2fbaed5ce3cc/bin/utaipan-7li7fVZpFI --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 7b66a12741a993de3de45354c2fb746af1f1a44b9ceb94bb607376650a8088af --- 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-5e519f3 [2022-11-03 03:28:24,370 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:28:24,372 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:28:24,397 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:28:24,398 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:28:24,399 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:28:24,400 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:28:24,402 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:28:24,403 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:28:24,404 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:28:24,405 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:28:24,406 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:28:24,407 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:28:24,408 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:28:24,409 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:28:24,410 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:28:24,411 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:28:24,412 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:28:24,413 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:28:24,415 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:28:24,416 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:28:24,418 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:28:24,419 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:28:24,420 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:28:24,424 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:28:24,424 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:28:24,425 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:28:24,426 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:28:24,426 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:28:24,427 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:28:24,428 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:28:24,429 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:28:24,430 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:28:24,430 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:28:24,431 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:28:24,432 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:28:24,433 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:28:24,433 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:28:24,433 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:28:24,434 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:28:24,435 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:28:24,436 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878355a6-7a0f-48ca-9351-2fbaed5ce3cc/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 03:28:24,458 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:28:24,459 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:28:24,459 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:28:24,460 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:28:24,461 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:28:24,461 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:28:24,461 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:28:24,462 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:28:24,462 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:28:24,462 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 03:28:24,463 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:28:24,463 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:28:24,463 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 03:28:24,464 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 03:28:24,464 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:28:24,464 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 03:28:24,465 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 03:28:24,465 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 03:28:24,466 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:28:24,466 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 03:28:24,466 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 03:28:24,467 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 03:28:24,467 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:28:24,467 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 03:28:24,468 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:28:24,468 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 03:28:24,468 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 03:28:24,469 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 03:28:24,469 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:28:24,469 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 03:28:24,470 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:28:24,470 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:28:24,470 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:28:24,471 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:28:24,471 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 03:28:24,472 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:28:24,472 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 03:28:24,472 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 03:28:24,472 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 03:28:24,473 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 03:28:24,473 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:28:24,473 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_878355a6-7a0f-48ca-9351-2fbaed5ce3cc/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878355a6-7a0f-48ca-9351-2fbaed5ce3cc/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7b66a12741a993de3de45354c2fb746af1f1a44b9ceb94bb607376650a8088af [2022-11-03 03:28:24,727 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:28:24,760 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:28:24,763 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:28:24,764 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:28:24,774 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:28:24,775 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878355a6-7a0f-48ca-9351-2fbaed5ce3cc/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/openssl/s3_srvr.blast.09.i.cil-1.c [2022-11-03 03:28:24,846 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878355a6-7a0f-48ca-9351-2fbaed5ce3cc/bin/utaipan-7li7fVZpFI/data/48414fb20/e71186970c654f8ca180e2075c876e0f/FLAG1ecef5034 [2022-11-03 03:28:25,388 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:28:25,389 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878355a6-7a0f-48ca-9351-2fbaed5ce3cc/sv-benchmarks/c/openssl/s3_srvr.blast.09.i.cil-1.c [2022-11-03 03:28:25,411 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878355a6-7a0f-48ca-9351-2fbaed5ce3cc/bin/utaipan-7li7fVZpFI/data/48414fb20/e71186970c654f8ca180e2075c876e0f/FLAG1ecef5034 [2022-11-03 03:28:25,681 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878355a6-7a0f-48ca-9351-2fbaed5ce3cc/bin/utaipan-7li7fVZpFI/data/48414fb20/e71186970c654f8ca180e2075c876e0f [2022-11-03 03:28:25,684 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:28:25,691 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:28:25,695 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:28:25,695 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:28:25,701 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:28:25,702 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:28:25" (1/1) ... [2022-11-03 03:28:25,703 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@680faccd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:25, skipping insertion in model container [2022-11-03 03:28:25,704 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:28:25" (1/1) ... [2022-11-03 03:28:25,712 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:28:25,766 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:28:26,347 WARN L230 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_878355a6-7a0f-48ca-9351-2fbaed5ce3cc/sv-benchmarks/c/openssl/s3_srvr.blast.09.i.cil-1.c[74369,74382] [2022-11-03 03:28:26,370 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:28:26,392 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:28:26,587 WARN L230 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_878355a6-7a0f-48ca-9351-2fbaed5ce3cc/sv-benchmarks/c/openssl/s3_srvr.blast.09.i.cil-1.c[74369,74382] [2022-11-03 03:28:26,590 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:28:26,618 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:28:26,619 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:26 WrapperNode [2022-11-03 03:28:26,619 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:28:26,620 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:28:26,620 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:28:26,620 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:28:26,629 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:26" (1/1) ... [2022-11-03 03:28:26,677 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:26" (1/1) ... [2022-11-03 03:28:26,754 INFO L138 Inliner]: procedures = 31, calls = 223, calls flagged for inlining = 7, calls inlined = 3, statements flattened = 792 [2022-11-03 03:28:26,755 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:28:26,756 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:28:26,756 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:28:26,756 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:28:26,766 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:26" (1/1) ... [2022-11-03 03:28:26,767 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:26" (1/1) ... [2022-11-03 03:28:26,783 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:26" (1/1) ... [2022-11-03 03:28:26,790 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:26" (1/1) ... [2022-11-03 03:28:26,848 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:26" (1/1) ... [2022-11-03 03:28:26,862 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:26" (1/1) ... [2022-11-03 03:28:26,871 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:26" (1/1) ... [2022-11-03 03:28:26,877 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:26" (1/1) ... [2022-11-03 03:28:26,889 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:28:26,891 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:28:26,891 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:28:26,892 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:28:26,895 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:26" (1/1) ... [2022-11-03 03:28:26,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:28:26,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878355a6-7a0f-48ca-9351-2fbaed5ce3cc/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:28:26,944 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878355a6-7a0f-48ca-9351-2fbaed5ce3cc/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:28:26,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878355a6-7a0f-48ca-9351-2fbaed5ce3cc/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:28:26,992 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 03:28:26,993 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-03 03:28:26,993 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 03:28:26,993 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 03:28:26,993 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-03 03:28:26,994 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 03:28:26,994 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 03:28:26,994 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:28:26,994 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:28:27,201 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:28:27,203 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:28:27,224 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-11-03 03:28:29,125 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2022-11-03 03:28:29,128 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2022-11-03 03:28:29,128 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:28:29,648 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:28:29,648 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 03:28:29,652 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:28:29 BoogieIcfgContainer [2022-11-03 03:28:29,652 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:28:29,654 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:28:29,655 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:28:29,659 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:28:29,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:28:25" (1/3) ... [2022-11-03 03:28:29,660 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@531ac55a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:28:29, skipping insertion in model container [2022-11-03 03:28:29,660 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:26" (2/3) ... [2022-11-03 03:28:29,661 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@531ac55a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:28:29, skipping insertion in model container [2022-11-03 03:28:29,661 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:28:29" (3/3) ... [2022-11-03 03:28:29,663 INFO L112 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.09.i.cil-1.c [2022-11-03 03:28:29,686 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:28:29,686 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 03:28:29,749 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:28:29,758 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;@25d4da8a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:28:29,758 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 03:28:29,764 INFO L276 IsEmpty]: Start isEmpty. Operand has 109 states, 107 states have (on average 1.7570093457943925) internal successors, (188), 108 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:29,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-03 03:28:29,775 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:28:29,776 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] [2022-11-03 03:28:29,776 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:28:29,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:28:29,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1727946225, now seen corresponding path program 1 times [2022-11-03 03:28:29,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:28:29,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002357759] [2022-11-03 03:28:29,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:28:29,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:28:30,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:28:31,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:28:31,273 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:28:31,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002357759] [2022-11-03 03:28:31,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002357759] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:28:31,274 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:28:31,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:28:31,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122692279] [2022-11-03 03:28:31,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:28:31,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:28:31,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:28:31,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:28:31,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:28:31,331 INFO L87 Difference]: Start difference. First operand has 109 states, 107 states have (on average 1.7570093457943925) internal successors, (188), 108 states have internal predecessors, (188), 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 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:33,367 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:28:34,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:28:34,055 INFO L93 Difference]: Finished difference Result 241 states and 416 transitions. [2022-11-03 03:28:34,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:28:34,059 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 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 29 [2022-11-03 03:28:34,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:28:34,069 INFO L225 Difference]: With dead ends: 241 [2022-11-03 03:28:34,070 INFO L226 Difference]: Without dead ends: 128 [2022-11-03 03:28:34,073 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:28:34,077 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 20 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:28:34,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 393 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 160 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2022-11-03 03:28:34,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-11-03 03:28:34,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 116. [2022-11-03 03:28:34,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.5391304347826087) internal successors, (177), 115 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:34,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 177 transitions. [2022-11-03 03:28:34,125 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 177 transitions. Word has length 29 [2022-11-03 03:28:34,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:28:34,125 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 177 transitions. [2022-11-03 03:28:34,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:34,126 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 177 transitions. [2022-11-03 03:28:34,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-03 03:28:34,128 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:28:34,128 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:28:34,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 03:28:34,129 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:28:34,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:28:34,130 INFO L85 PathProgramCache]: Analyzing trace with hash 914306142, now seen corresponding path program 1 times [2022-11-03 03:28:34,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:28:34,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980788399] [2022-11-03 03:28:34,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:28:34,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:28:34,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:28:34,907 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:28:34,907 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:28:34,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980788399] [2022-11-03 03:28:34,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980788399] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:28:34,910 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:28:34,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:28:34,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469280391] [2022-11-03 03:28:34,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:28:34,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:28:34,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:28:34,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:28:34,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:28:34,915 INFO L87 Difference]: Start difference. First operand 116 states and 177 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:36,937 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:28:37,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:28:37,394 INFO L93 Difference]: Finished difference Result 232 states and 348 transitions. [2022-11-03 03:28:37,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:28:37,396 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-11-03 03:28:37,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:28:37,398 INFO L225 Difference]: With dead ends: 232 [2022-11-03 03:28:37,398 INFO L226 Difference]: Without dead ends: 128 [2022-11-03 03:28:37,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:28:37,400 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 19 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:28:37,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 325 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 148 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2022-11-03 03:28:37,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-11-03 03:28:37,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 116. [2022-11-03 03:28:37,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.5304347826086957) internal successors, (176), 115 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:37,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 176 transitions. [2022-11-03 03:28:37,414 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 176 transitions. Word has length 39 [2022-11-03 03:28:37,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:28:37,415 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 176 transitions. [2022-11-03 03:28:37,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:37,416 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 176 transitions. [2022-11-03 03:28:37,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-03 03:28:37,417 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:28:37,417 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:28:37,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 03:28:37,418 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:28:37,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:28:37,419 INFO L85 PathProgramCache]: Analyzing trace with hash 750257119, now seen corresponding path program 1 times [2022-11-03 03:28:37,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:28:37,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509513898] [2022-11-03 03:28:37,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:28:37,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:28:37,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:28:38,169 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:28:38,170 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:28:38,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509513898] [2022-11-03 03:28:38,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509513898] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:28:38,171 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:28:38,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:28:38,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183063084] [2022-11-03 03:28:38,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:28:38,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:28:38,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:28:38,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:28:38,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:28:38,174 INFO L87 Difference]: Start difference. First operand 116 states and 176 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:40,188 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:28:40,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:28:40,841 INFO L93 Difference]: Finished difference Result 321 states and 487 transitions. [2022-11-03 03:28:40,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:28:40,842 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 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 40 [2022-11-03 03:28:40,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:28:40,843 INFO L225 Difference]: With dead ends: 321 [2022-11-03 03:28:40,843 INFO L226 Difference]: Without dead ends: 217 [2022-11-03 03:28:40,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:28:40,845 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 119 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 52 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:28:40,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 221 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 231 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2022-11-03 03:28:40,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-11-03 03:28:40,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 126. [2022-11-03 03:28:40,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.512) internal successors, (189), 125 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:40,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 189 transitions. [2022-11-03 03:28:40,873 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 189 transitions. Word has length 40 [2022-11-03 03:28:40,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:28:40,873 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 189 transitions. [2022-11-03 03:28:40,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:40,874 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 189 transitions. [2022-11-03 03:28:40,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-03 03:28:40,877 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:28:40,878 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:28:40,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 03:28:40,878 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:28:40,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:28:40,880 INFO L85 PathProgramCache]: Analyzing trace with hash 93169325, now seen corresponding path program 1 times [2022-11-03 03:28:40,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:28:40,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673598835] [2022-11-03 03:28:40,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:28:40,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:28:41,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:28:41,558 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:28:41,560 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:28:41,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673598835] [2022-11-03 03:28:41,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673598835] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:28:41,567 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:28:41,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:28:41,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130920397] [2022-11-03 03:28:41,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:28:41,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:28:41,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:28:41,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:28:41,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:28:41,571 INFO L87 Difference]: Start difference. First operand 126 states and 189 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:43,584 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:28:44,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:28:44,205 INFO L93 Difference]: Finished difference Result 331 states and 499 transitions. [2022-11-03 03:28:44,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:28:44,206 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-11-03 03:28:44,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:28:44,208 INFO L225 Difference]: With dead ends: 331 [2022-11-03 03:28:44,208 INFO L226 Difference]: Without dead ends: 217 [2022-11-03 03:28:44,209 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:28:44,209 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 117 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 52 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:28:44,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 221 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 231 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2022-11-03 03:28:44,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-11-03 03:28:44,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 127. [2022-11-03 03:28:44,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.5) internal successors, (189), 126 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:44,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 189 transitions. [2022-11-03 03:28:44,237 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 189 transitions. Word has length 41 [2022-11-03 03:28:44,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:28:44,239 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 189 transitions. [2022-11-03 03:28:44,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:44,240 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 189 transitions. [2022-11-03 03:28:44,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-03 03:28:44,243 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:28:44,244 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:28:44,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 03:28:44,245 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:28:44,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:28:44,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1600964730, now seen corresponding path program 1 times [2022-11-03 03:28:44,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:28:44,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701285851] [2022-11-03 03:28:44,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:28:44,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:28:44,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:28:44,703 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:28:44,703 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:28:44,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701285851] [2022-11-03 03:28:44,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701285851] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:28:44,704 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:28:44,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:28:44,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827856197] [2022-11-03 03:28:44,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:28:44,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:28:44,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:28:44,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:28:44,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:28:44,706 INFO L87 Difference]: Start difference. First operand 127 states and 189 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:46,723 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:28:47,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:28:47,109 INFO L93 Difference]: Finished difference Result 254 states and 375 transitions. [2022-11-03 03:28:47,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:28:47,111 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-11-03 03:28:47,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:28:47,112 INFO L225 Difference]: With dead ends: 254 [2022-11-03 03:28:47,112 INFO L226 Difference]: Without dead ends: 139 [2022-11-03 03:28:47,113 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:28:47,114 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 11 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:28:47,114 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 324 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 149 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2022-11-03 03:28:47,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-11-03 03:28:47,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 127. [2022-11-03 03:28:47,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.492063492063492) internal successors, (188), 126 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:47,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 188 transitions. [2022-11-03 03:28:47,124 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 188 transitions. Word has length 41 [2022-11-03 03:28:47,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:28:47,124 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 188 transitions. [2022-11-03 03:28:47,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:47,125 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 188 transitions. [2022-11-03 03:28:47,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-03 03:28:47,126 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:28:47,126 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] [2022-11-03 03:28:47,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 03:28:47,127 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:28:47,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:28:47,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1346880773, now seen corresponding path program 1 times [2022-11-03 03:28:47,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:28:47,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805988409] [2022-11-03 03:28:47,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:28:47,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:28:47,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:28:47,601 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:28:47,601 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:28:47,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805988409] [2022-11-03 03:28:47,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805988409] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:28:47,602 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:28:47,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:28:47,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756714484] [2022-11-03 03:28:47,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:28:47,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:28:47,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:28:47,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:28:47,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:28:47,604 INFO L87 Difference]: Start difference. First operand 127 states and 188 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:49,615 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:28:50,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:28:50,031 INFO L93 Difference]: Finished difference Result 254 states and 374 transitions. [2022-11-03 03:28:50,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:28:50,035 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-11-03 03:28:50,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:28:50,036 INFO L225 Difference]: With dead ends: 254 [2022-11-03 03:28:50,037 INFO L226 Difference]: Without dead ends: 139 [2022-11-03 03:28:50,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:28:50,038 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 9 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:28:50,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 325 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 148 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2022-11-03 03:28:50,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-11-03 03:28:50,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 127. [2022-11-03 03:28:50,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.4841269841269842) internal successors, (187), 126 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:50,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 187 transitions. [2022-11-03 03:28:50,046 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 187 transitions. Word has length 41 [2022-11-03 03:28:50,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:28:50,047 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 187 transitions. [2022-11-03 03:28:50,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:50,047 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 187 transitions. [2022-11-03 03:28:50,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-03 03:28:50,048 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:28:50,048 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:28:50,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 03:28:50,049 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:28:50,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:28:50,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1885808468, now seen corresponding path program 1 times [2022-11-03 03:28:50,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:28:50,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372950513] [2022-11-03 03:28:50,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:28:50,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:28:50,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:28:50,554 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:28:50,555 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:28:50,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372950513] [2022-11-03 03:28:50,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372950513] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:28:50,555 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:28:50,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:28:50,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445669657] [2022-11-03 03:28:50,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:28:50,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:28:50,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:28:50,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:28:50,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:28:50,558 INFO L87 Difference]: Start difference. First operand 127 states and 187 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:52,572 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:28:53,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:28:53,123 INFO L93 Difference]: Finished difference Result 332 states and 496 transitions. [2022-11-03 03:28:53,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:28:53,124 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 3 states have internal predecessors, (42), 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 42 [2022-11-03 03:28:53,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:28:53,125 INFO L225 Difference]: With dead ends: 332 [2022-11-03 03:28:53,125 INFO L226 Difference]: Without dead ends: 217 [2022-11-03 03:28:53,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:28:53,126 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 112 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 52 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:28:53,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 221 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 231 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2022-11-03 03:28:53,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-11-03 03:28:53,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 131. [2022-11-03 03:28:53,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.4846153846153847) internal successors, (193), 130 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:53,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 193 transitions. [2022-11-03 03:28:53,157 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 193 transitions. Word has length 42 [2022-11-03 03:28:53,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:28:53,157 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 193 transitions. [2022-11-03 03:28:53,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:53,158 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 193 transitions. [2022-11-03 03:28:53,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-03 03:28:53,159 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:28:53,159 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:28:53,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-03 03:28:53,159 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:28:53,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:28:53,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1935116422, now seen corresponding path program 1 times [2022-11-03 03:28:53,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:28:53,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775153175] [2022-11-03 03:28:53,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:28:53,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:28:53,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:28:53,561 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:28:53,561 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:28:53,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775153175] [2022-11-03 03:28:53,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775153175] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:28:53,562 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:28:53,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:28:53,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84823769] [2022-11-03 03:28:53,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:28:53,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:28:53,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:28:53,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:28:53,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:28:53,564 INFO L87 Difference]: Start difference. First operand 131 states and 193 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:55,581 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:28:55,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:28:55,977 INFO L93 Difference]: Finished difference Result 260 states and 384 transitions. [2022-11-03 03:28:55,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:28:55,979 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 3 states have internal predecessors, (42), 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 42 [2022-11-03 03:28:55,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:28:55,979 INFO L225 Difference]: With dead ends: 260 [2022-11-03 03:28:55,980 INFO L226 Difference]: Without dead ends: 141 [2022-11-03 03:28:55,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:28:55,981 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 11 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:28:55,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 328 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 145 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2022-11-03 03:28:55,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-11-03 03:28:55,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 131. [2022-11-03 03:28:55,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.476923076923077) internal successors, (192), 130 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:55,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 192 transitions. [2022-11-03 03:28:55,991 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 192 transitions. Word has length 42 [2022-11-03 03:28:55,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:28:55,992 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 192 transitions. [2022-11-03 03:28:55,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:55,992 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 192 transitions. [2022-11-03 03:28:55,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-03 03:28:55,993 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:28:55,993 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 03:28:55,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-03 03:28:55,993 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:28:55,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:28:55,994 INFO L85 PathProgramCache]: Analyzing trace with hash 774101544, now seen corresponding path program 1 times [2022-11-03 03:28:55,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:28:55,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087304294] [2022-11-03 03:28:55,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:28:55,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:28:56,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:28:56,437 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:28:56,437 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:28:56,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087304294] [2022-11-03 03:28:56,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087304294] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:28:56,438 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:28:56,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:28:56,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614356618] [2022-11-03 03:28:56,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:28:56,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:28:56,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:28:56,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:28:56,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:28:56,440 INFO L87 Difference]: Start difference. First operand 131 states and 192 transitions. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:58,453 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:28:59,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:28:59,066 INFO L93 Difference]: Finished difference Result 336 states and 500 transitions. [2022-11-03 03:28:59,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:28:59,067 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-11-03 03:28:59,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:28:59,068 INFO L225 Difference]: With dead ends: 336 [2022-11-03 03:28:59,068 INFO L226 Difference]: Without dead ends: 217 [2022-11-03 03:28:59,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:28:59,070 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 113 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 52 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:28:59,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 221 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 231 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2022-11-03 03:28:59,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-11-03 03:28:59,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 131. [2022-11-03 03:28:59,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.4615384615384615) internal successors, (190), 130 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:59,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 190 transitions. [2022-11-03 03:28:59,079 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 190 transitions. Word has length 43 [2022-11-03 03:28:59,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:28:59,079 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 190 transitions. [2022-11-03 03:28:59,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:59,080 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 190 transitions. [2022-11-03 03:28:59,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-03 03:28:59,081 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:28:59,081 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:28:59,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-03 03:28:59,081 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:28:59,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:28:59,082 INFO L85 PathProgramCache]: Analyzing trace with hash -664317600, now seen corresponding path program 1 times [2022-11-03 03:28:59,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:28:59,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037378998] [2022-11-03 03:28:59,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:28:59,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:28:59,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:28:59,529 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:28:59,529 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:28:59,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037378998] [2022-11-03 03:28:59,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037378998] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:28:59,530 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:28:59,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:28:59,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496677556] [2022-11-03 03:28:59,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:28:59,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:28:59,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:28:59,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:28:59,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:28:59,532 INFO L87 Difference]: Start difference. First operand 131 states and 190 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:01,553 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:29:02,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:02,208 INFO L93 Difference]: Finished difference Result 351 states and 518 transitions. [2022-11-03 03:29:02,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:29:02,209 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-11-03 03:29:02,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:02,211 INFO L225 Difference]: With dead ends: 351 [2022-11-03 03:29:02,211 INFO L226 Difference]: Without dead ends: 232 [2022-11-03 03:29:02,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:29:02,212 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 96 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 48 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:02,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 242 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 236 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2022-11-03 03:29:02,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-11-03 03:29:02,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 157. [2022-11-03 03:29:02,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.4871794871794872) internal successors, (232), 156 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:02,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 232 transitions. [2022-11-03 03:29:02,222 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 232 transitions. Word has length 44 [2022-11-03 03:29:02,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:02,222 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 232 transitions. [2022-11-03 03:29:02,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:02,223 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 232 transitions. [2022-11-03 03:29:02,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-03 03:29:02,224 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:02,224 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:29:02,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-03 03:29:02,225 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:02,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:02,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1025338416, now seen corresponding path program 1 times [2022-11-03 03:29:02,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:29:02,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130904266] [2022-11-03 03:29:02,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:02,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:29:02,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:02,699 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:29:02,699 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:29:02,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130904266] [2022-11-03 03:29:02,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130904266] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:29:02,700 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:29:02,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:29:02,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901463356] [2022-11-03 03:29:02,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:29:02,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:29:02,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:29:02,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:29:02,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:29:02,703 INFO L87 Difference]: Start difference. First operand 157 states and 232 transitions. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:04,716 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:29:05,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:05,322 INFO L93 Difference]: Finished difference Result 388 states and 581 transitions. [2022-11-03 03:29:05,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:29:05,323 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-11-03 03:29:05,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:05,325 INFO L225 Difference]: With dead ends: 388 [2022-11-03 03:29:05,325 INFO L226 Difference]: Without dead ends: 243 [2022-11-03 03:29:05,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:29:05,326 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 95 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 50 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:05,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 242 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 235 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2022-11-03 03:29:05,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-11-03 03:29:05,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 169. [2022-11-03 03:29:05,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 1.5178571428571428) internal successors, (255), 168 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:05,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 255 transitions. [2022-11-03 03:29:05,352 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 255 transitions. Word has length 45 [2022-11-03 03:29:05,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:05,352 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 255 transitions. [2022-11-03 03:29:05,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:05,352 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 255 transitions. [2022-11-03 03:29:05,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-03 03:29:05,353 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:05,353 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:29:05,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-03 03:29:05,354 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:05,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:05,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1471340479, now seen corresponding path program 1 times [2022-11-03 03:29:05,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:29:05,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101214934] [2022-11-03 03:29:05,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:05,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:29:05,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:05,804 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:29:05,804 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:29:05,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101214934] [2022-11-03 03:29:05,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101214934] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:29:05,805 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:29:05,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:29:05,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62976268] [2022-11-03 03:29:05,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:29:05,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:29:05,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:29:05,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:29:05,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:29:05,807 INFO L87 Difference]: Start difference. First operand 169 states and 255 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:07,822 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:29:08,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:08,426 INFO L93 Difference]: Finished difference Result 427 states and 646 transitions. [2022-11-03 03:29:08,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:29:08,427 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 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 50 [2022-11-03 03:29:08,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:08,428 INFO L225 Difference]: With dead ends: 427 [2022-11-03 03:29:08,429 INFO L226 Difference]: Without dead ends: 270 [2022-11-03 03:29:08,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:29:08,430 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 84 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 46 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:08,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 242 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 237 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2022-11-03 03:29:08,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2022-11-03 03:29:08,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 206. [2022-11-03 03:29:08,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 1.5463414634146342) internal successors, (317), 205 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:08,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 317 transitions. [2022-11-03 03:29:08,443 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 317 transitions. Word has length 50 [2022-11-03 03:29:08,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:08,444 INFO L495 AbstractCegarLoop]: Abstraction has 206 states and 317 transitions. [2022-11-03 03:29:08,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:08,444 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 317 transitions. [2022-11-03 03:29:08,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-03 03:29:08,446 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:08,446 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:29:08,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-03 03:29:08,447 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:08,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:08,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1640122582, now seen corresponding path program 1 times [2022-11-03 03:29:08,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:29:08,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531032127] [2022-11-03 03:29:08,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:08,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:29:08,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:08,789 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:29:08,789 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:29:08,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531032127] [2022-11-03 03:29:08,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531032127] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:29:08,790 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:29:08,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:29:08,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495495815] [2022-11-03 03:29:08,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:29:08,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:29:08,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:29:08,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:29:08,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:29:08,792 INFO L87 Difference]: Start difference. First operand 206 states and 317 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:10,804 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:29:11,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:11,201 INFO L93 Difference]: Finished difference Result 434 states and 669 transitions. [2022-11-03 03:29:11,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:29:11,202 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-11-03 03:29:11,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:11,203 INFO L225 Difference]: With dead ends: 434 [2022-11-03 03:29:11,204 INFO L226 Difference]: Without dead ends: 240 [2022-11-03 03:29:11,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:29:11,205 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 17 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:11,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 333 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 164 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2022-11-03 03:29:11,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-11-03 03:29:11,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 226. [2022-11-03 03:29:11,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 1.5422222222222222) internal successors, (347), 225 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:11,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 347 transitions. [2022-11-03 03:29:11,216 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 347 transitions. Word has length 51 [2022-11-03 03:29:11,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:11,216 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 347 transitions. [2022-11-03 03:29:11,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:11,217 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 347 transitions. [2022-11-03 03:29:11,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-03 03:29:11,217 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:11,218 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:29:11,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-03 03:29:11,218 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:11,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:11,219 INFO L85 PathProgramCache]: Analyzing trace with hash 642045755, now seen corresponding path program 1 times [2022-11-03 03:29:11,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:29:11,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626253584] [2022-11-03 03:29:11,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:11,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:29:11,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:11,612 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:29:11,612 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:29:11,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626253584] [2022-11-03 03:29:11,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626253584] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:29:11,613 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:29:11,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:29:11,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176389589] [2022-11-03 03:29:11,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:29:11,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:29:11,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:29:11,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:29:11,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:29:11,615 INFO L87 Difference]: Start difference. First operand 226 states and 347 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:13,630 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:29:14,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:14,026 INFO L93 Difference]: Finished difference Result 454 states and 698 transitions. [2022-11-03 03:29:14,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:29:14,028 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 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 61 [2022-11-03 03:29:14,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:14,029 INFO L225 Difference]: With dead ends: 454 [2022-11-03 03:29:14,029 INFO L226 Difference]: Without dead ends: 240 [2022-11-03 03:29:14,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:29:14,030 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 28 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:14,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 335 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 161 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2022-11-03 03:29:14,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-11-03 03:29:14,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 226. [2022-11-03 03:29:14,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 1.5377777777777777) internal successors, (346), 225 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:14,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 346 transitions. [2022-11-03 03:29:14,039 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 346 transitions. Word has length 61 [2022-11-03 03:29:14,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:14,040 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 346 transitions. [2022-11-03 03:29:14,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:14,040 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 346 transitions. [2022-11-03 03:29:14,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-03 03:29:14,041 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:14,041 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2022-11-03 03:29:14,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-03 03:29:14,041 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:14,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:14,042 INFO L85 PathProgramCache]: Analyzing trace with hash 814592991, now seen corresponding path program 1 times [2022-11-03 03:29:14,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:29:14,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969283325] [2022-11-03 03:29:14,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:14,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:29:14,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:14,426 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:29:14,426 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:29:14,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969283325] [2022-11-03 03:29:14,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969283325] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:29:14,427 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:29:14,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:29:14,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399293367] [2022-11-03 03:29:14,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:29:14,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:29:14,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:29:14,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:29:14,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:29:14,429 INFO L87 Difference]: Start difference. First operand 226 states and 346 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:16,442 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:29:16,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:16,872 INFO L93 Difference]: Finished difference Result 452 states and 694 transitions. [2022-11-03 03:29:16,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:29:16,874 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 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 63 [2022-11-03 03:29:16,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:16,875 INFO L225 Difference]: With dead ends: 452 [2022-11-03 03:29:16,875 INFO L226 Difference]: Without dead ends: 238 [2022-11-03 03:29:16,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:29:16,877 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 22 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:16,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 337 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 159 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2022-11-03 03:29:16,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-11-03 03:29:16,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 226. [2022-11-03 03:29:16,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 1.5333333333333334) internal successors, (345), 225 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:16,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 345 transitions. [2022-11-03 03:29:16,889 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 345 transitions. Word has length 63 [2022-11-03 03:29:16,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:16,891 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 345 transitions. [2022-11-03 03:29:16,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:16,891 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 345 transitions. [2022-11-03 03:29:16,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-03 03:29:16,892 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:16,892 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:29:16,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-03 03:29:16,893 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:16,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:16,893 INFO L85 PathProgramCache]: Analyzing trace with hash -2048748300, now seen corresponding path program 1 times [2022-11-03 03:29:16,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:29:16,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243675963] [2022-11-03 03:29:16,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:16,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:29:17,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:17,321 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:29:17,322 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:29:17,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243675963] [2022-11-03 03:29:17,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243675963] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:29:17,325 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:29:17,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:29:17,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901319567] [2022-11-03 03:29:17,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:29:17,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:29:17,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:29:17,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:29:17,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:29:17,327 INFO L87 Difference]: Start difference. First operand 226 states and 345 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:19,342 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:29:19,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:19,902 INFO L93 Difference]: Finished difference Result 514 states and 783 transitions. [2022-11-03 03:29:19,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:29:19,903 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 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 63 [2022-11-03 03:29:19,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:19,904 INFO L225 Difference]: With dead ends: 514 [2022-11-03 03:29:19,905 INFO L226 Difference]: Without dead ends: 300 [2022-11-03 03:29:19,905 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:29:19,906 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 106 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 49 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:19,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 243 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 235 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2022-11-03 03:29:19,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2022-11-03 03:29:19,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 226. [2022-11-03 03:29:19,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 1.5155555555555555) internal successors, (341), 225 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:19,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 341 transitions. [2022-11-03 03:29:19,916 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 341 transitions. Word has length 63 [2022-11-03 03:29:19,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:19,916 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 341 transitions. [2022-11-03 03:29:19,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:19,916 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 341 transitions. [2022-11-03 03:29:19,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-03 03:29:19,917 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:19,917 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:29:19,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-03 03:29:19,918 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:19,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:19,918 INFO L85 PathProgramCache]: Analyzing trace with hash -276677471, now seen corresponding path program 1 times [2022-11-03 03:29:19,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:29:19,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347086326] [2022-11-03 03:29:19,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:19,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:29:20,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:20,576 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:29:20,576 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:29:20,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347086326] [2022-11-03 03:29:20,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347086326] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:29:20,577 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:29:20,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:29:20,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512826125] [2022-11-03 03:29:20,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:29:20,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:29:20,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:29:20,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:29:20,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:29:20,579 INFO L87 Difference]: Start difference. First operand 226 states and 341 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:22,590 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:29:23,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:23,184 INFO L93 Difference]: Finished difference Result 448 states and 680 transitions. [2022-11-03 03:29:23,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:29:23,186 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 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 64 [2022-11-03 03:29:23,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:23,187 INFO L225 Difference]: With dead ends: 448 [2022-11-03 03:29:23,187 INFO L226 Difference]: Without dead ends: 234 [2022-11-03 03:29:23,187 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:29:23,188 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 116 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 32 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:23,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 234 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 268 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2022-11-03 03:29:23,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-11-03 03:29:23,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 233. [2022-11-03 03:29:23,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 1.4913793103448276) internal successors, (346), 232 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:23,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 346 transitions. [2022-11-03 03:29:23,198 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 346 transitions. Word has length 64 [2022-11-03 03:29:23,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:23,198 INFO L495 AbstractCegarLoop]: Abstraction has 233 states and 346 transitions. [2022-11-03 03:29:23,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:23,199 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 346 transitions. [2022-11-03 03:29:23,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-03 03:29:23,199 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:23,199 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:29:23,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-03 03:29:23,200 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:23,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:23,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1354742766, now seen corresponding path program 1 times [2022-11-03 03:29:23,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:29:23,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394563658] [2022-11-03 03:29:23,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:23,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:29:23,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:23,589 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:29:23,589 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:29:23,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394563658] [2022-11-03 03:29:23,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394563658] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:29:23,590 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:29:23,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:29:23,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085881501] [2022-11-03 03:29:23,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:29:23,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:29:23,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:29:23,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:29:23,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:29:23,592 INFO L87 Difference]: Start difference. First operand 233 states and 346 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:25,605 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:29:26,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:26,031 INFO L93 Difference]: Finished difference Result 458 states and 684 transitions. [2022-11-03 03:29:26,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:29:26,033 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 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 65 [2022-11-03 03:29:26,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:26,034 INFO L225 Difference]: With dead ends: 458 [2022-11-03 03:29:26,034 INFO L226 Difference]: Without dead ends: 237 [2022-11-03 03:29:26,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:29:26,036 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 19 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:26,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 347 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 149 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2022-11-03 03:29:26,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-11-03 03:29:26,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 233. [2022-11-03 03:29:26,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 1.4870689655172413) internal successors, (345), 232 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:26,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 345 transitions. [2022-11-03 03:29:26,048 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 345 transitions. Word has length 65 [2022-11-03 03:29:26,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:26,048 INFO L495 AbstractCegarLoop]: Abstraction has 233 states and 345 transitions. [2022-11-03 03:29:26,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:26,049 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 345 transitions. [2022-11-03 03:29:26,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-03 03:29:26,050 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:26,050 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-03 03:29:26,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-03 03:29:26,051 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:26,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:26,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1320899227, now seen corresponding path program 1 times [2022-11-03 03:29:26,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:29:26,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947568550] [2022-11-03 03:29:26,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:26,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:29:26,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:26,499 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:29:26,499 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:29:26,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947568550] [2022-11-03 03:29:26,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947568550] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:29:26,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772514056] [2022-11-03 03:29:26,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:26,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:29:26,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878355a6-7a0f-48ca-9351-2fbaed5ce3cc/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:29:26,507 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878355a6-7a0f-48ca-9351-2fbaed5ce3cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:29:26,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878355a6-7a0f-48ca-9351-2fbaed5ce3cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 03:29:27,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:27,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 903 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 03:29:27,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:27,679 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:29:27,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:29:27,936 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-03 03:29:27,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772514056] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 03:29:27,937 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:29:27,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4, 4] total 5 [2022-11-03 03:29:27,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637092426] [2022-11-03 03:29:27,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:29:27,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:29:27,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:29:27,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:29:27,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:29:27,939 INFO L87 Difference]: Start difference. First operand 233 states and 345 transitions. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 2 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:29,960 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:29:30,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:30,163 INFO L93 Difference]: Finished difference Result 452 states and 676 transitions. [2022-11-03 03:29:30,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:29:30,164 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 2 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2022-11-03 03:29:30,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:30,166 INFO L225 Difference]: With dead ends: 452 [2022-11-03 03:29:30,166 INFO L226 Difference]: Without dead ends: 450 [2022-11-03 03:29:30,166 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 134 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:29:30,167 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 107 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:30,167 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 277 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-11-03 03:29:30,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2022-11-03 03:29:30,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 447. [2022-11-03 03:29:30,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 446 states have (on average 1.5) internal successors, (669), 446 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:30,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 669 transitions. [2022-11-03 03:29:30,187 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 669 transitions. Word has length 69 [2022-11-03 03:29:30,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:30,188 INFO L495 AbstractCegarLoop]: Abstraction has 447 states and 669 transitions. [2022-11-03 03:29:30,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 2 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:30,188 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 669 transitions. [2022-11-03 03:29:30,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-03 03:29:30,220 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:30,220 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:29:30,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878355a6-7a0f-48ca-9351-2fbaed5ce3cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 03:29:30,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878355a6-7a0f-48ca-9351-2fbaed5ce3cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:29:30,420 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:30,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:30,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1077505948, now seen corresponding path program 1 times [2022-11-03 03:29:30,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:29:30,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454571428] [2022-11-03 03:29:30,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:30,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:29:30,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:30,903 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-03 03:29:30,904 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:29:30,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454571428] [2022-11-03 03:29:30,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454571428] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:29:30,904 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:29:30,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:29:30,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58303008] [2022-11-03 03:29:30,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:29:30,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:29:30,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:29:30,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:29:30,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:29:30,906 INFO L87 Difference]: Start difference. First operand 447 states and 669 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:32,919 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:29:33,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:33,543 INFO L93 Difference]: Finished difference Result 1023 states and 1525 transitions. [2022-11-03 03:29:33,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:29:33,545 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 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 91 [2022-11-03 03:29:33,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:33,547 INFO L225 Difference]: With dead ends: 1023 [2022-11-03 03:29:33,547 INFO L226 Difference]: Without dead ends: 588 [2022-11-03 03:29:33,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:29:33,550 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 83 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 45 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:33,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 250 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 235 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2022-11-03 03:29:33,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2022-11-03 03:29:33,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 469. [2022-11-03 03:29:33,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 468 states have (on average 1.5192307692307692) internal successors, (711), 468 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:33,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 711 transitions. [2022-11-03 03:29:33,584 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 711 transitions. Word has length 91 [2022-11-03 03:29:33,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:33,584 INFO L495 AbstractCegarLoop]: Abstraction has 469 states and 711 transitions. [2022-11-03 03:29:33,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:33,585 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 711 transitions. [2022-11-03 03:29:33,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-11-03 03:29:33,586 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:33,587 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:29:33,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-03 03:29:33,587 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:33,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:33,588 INFO L85 PathProgramCache]: Analyzing trace with hash -541914932, now seen corresponding path program 1 times [2022-11-03 03:29:33,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:29:33,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702726982] [2022-11-03 03:29:33,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:33,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:29:34,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:34,763 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 03:29:34,763 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:29:34,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702726982] [2022-11-03 03:29:34,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702726982] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:29:34,764 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:29:34,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 03:29:34,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436355732] [2022-11-03 03:29:34,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:29:34,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:29:34,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:29:34,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:29:34,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:29:34,768 INFO L87 Difference]: Start difference. First operand 469 states and 711 transitions. Second operand has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:36,781 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:29:37,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:37,713 INFO L93 Difference]: Finished difference Result 1076 states and 1618 transitions. [2022-11-03 03:29:37,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:29:37,714 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 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 107 [2022-11-03 03:29:37,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:37,717 INFO L225 Difference]: With dead ends: 1076 [2022-11-03 03:29:37,717 INFO L226 Difference]: Without dead ends: 619 [2022-11-03 03:29:37,718 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:29:37,719 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 77 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 13 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:37,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 475 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 448 Invalid, 1 Unknown, 0 Unchecked, 2.9s Time] [2022-11-03 03:29:37,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2022-11-03 03:29:37,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 547. [2022-11-03 03:29:37,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 546 states have (on average 1.5293040293040292) internal successors, (835), 546 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:37,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 835 transitions. [2022-11-03 03:29:37,750 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 835 transitions. Word has length 107 [2022-11-03 03:29:37,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:37,751 INFO L495 AbstractCegarLoop]: Abstraction has 547 states and 835 transitions. [2022-11-03 03:29:37,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:37,751 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 835 transitions. [2022-11-03 03:29:37,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-03 03:29:37,755 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:37,755 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:29:37,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-03 03:29:37,755 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:37,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:37,756 INFO L85 PathProgramCache]: Analyzing trace with hash -2136354446, now seen corresponding path program 1 times [2022-11-03 03:29:37,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:29:37,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304516681] [2022-11-03 03:29:37,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:37,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:29:37,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:38,397 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:29:38,398 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:29:38,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304516681] [2022-11-03 03:29:38,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304516681] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:29:38,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245447519] [2022-11-03 03:29:38,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:38,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:29:38,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878355a6-7a0f-48ca-9351-2fbaed5ce3cc/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:29:38,403 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878355a6-7a0f-48ca-9351-2fbaed5ce3cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:29:38,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878355a6-7a0f-48ca-9351-2fbaed5ce3cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 03:29:39,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:39,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 1108 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 03:29:39,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:39,670 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:29:39,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:29:40,009 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-11-03 03:29:40,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245447519] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 03:29:40,009 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:29:40,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6, 6] total 7 [2022-11-03 03:29:40,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5989946] [2022-11-03 03:29:40,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:29:40,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:29:40,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:29:40,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:29:40,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:29:40,011 INFO L87 Difference]: Start difference. First operand 547 states and 835 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 2 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:42,024 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:29:42,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:42,222 INFO L93 Difference]: Finished difference Result 819 states and 1251 transitions. [2022-11-03 03:29:42,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:29:42,223 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 2 states have internal predecessors, (49), 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 109 [2022-11-03 03:29:42,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:42,227 INFO L225 Difference]: With dead ends: 819 [2022-11-03 03:29:42,227 INFO L226 Difference]: Without dead ends: 817 [2022-11-03 03:29:42,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 212 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:29:42,228 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 108 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:42,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 276 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-11-03 03:29:42,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2022-11-03 03:29:42,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 812. [2022-11-03 03:29:42,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 812 states, 811 states have (on average 1.5339087546239212) internal successors, (1244), 811 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:42,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 1244 transitions. [2022-11-03 03:29:42,271 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 1244 transitions. Word has length 109 [2022-11-03 03:29:42,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:42,271 INFO L495 AbstractCegarLoop]: Abstraction has 812 states and 1244 transitions. [2022-11-03 03:29:42,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 2 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:42,272 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 1244 transitions. [2022-11-03 03:29:42,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-11-03 03:29:42,274 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:42,274 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:29:42,318 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878355a6-7a0f-48ca-9351-2fbaed5ce3cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-03 03:29:42,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878355a6-7a0f-48ca-9351-2fbaed5ce3cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-03 03:29:42,495 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:42,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:42,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1029715563, now seen corresponding path program 1 times [2022-11-03 03:29:42,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:29:42,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129687851] [2022-11-03 03:29:42,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:42,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:29:42,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:42,986 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 114 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-03 03:29:42,987 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:29:42,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129687851] [2022-11-03 03:29:42,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129687851] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:29:42,987 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:29:42,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:29:42,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190928707] [2022-11-03 03:29:42,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:29:42,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:29:42,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:29:42,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:29:42,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:29:42,989 INFO L87 Difference]: Start difference. First operand 812 states and 1244 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:45,002 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:29:45,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:45,705 INFO L93 Difference]: Finished difference Result 1930 states and 2938 transitions. [2022-11-03 03:29:45,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:29:45,706 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 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 118 [2022-11-03 03:29:45,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:45,711 INFO L225 Difference]: With dead ends: 1930 [2022-11-03 03:29:45,711 INFO L226 Difference]: Without dead ends: 1130 [2022-11-03 03:29:45,713 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:29:45,714 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 89 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 36 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:45,714 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 266 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 236 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2022-11-03 03:29:45,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1130 states. [2022-11-03 03:29:45,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1130 to 932. [2022-11-03 03:29:45,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 932 states, 931 states have (on average 1.5284640171858217) internal successors, (1423), 931 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:45,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 932 states to 932 states and 1423 transitions. [2022-11-03 03:29:45,782 INFO L78 Accepts]: Start accepts. Automaton has 932 states and 1423 transitions. Word has length 118 [2022-11-03 03:29:45,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:45,783 INFO L495 AbstractCegarLoop]: Abstraction has 932 states and 1423 transitions. [2022-11-03 03:29:45,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:45,783 INFO L276 IsEmpty]: Start isEmpty. Operand 932 states and 1423 transitions. [2022-11-03 03:29:45,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-11-03 03:29:45,786 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:45,786 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:29:45,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-03 03:29:45,787 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:45,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:45,787 INFO L85 PathProgramCache]: Analyzing trace with hash -660646847, now seen corresponding path program 1 times [2022-11-03 03:29:45,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:29:45,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089004368] [2022-11-03 03:29:45,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:45,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:29:45,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:46,276 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-03 03:29:46,277 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:29:46,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089004368] [2022-11-03 03:29:46,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089004368] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:29:46,277 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:29:46,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:29:46,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450078251] [2022-11-03 03:29:46,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:29:46,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:29:46,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:29:46,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:29:46,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:29:46,280 INFO L87 Difference]: Start difference. First operand 932 states and 1423 transitions. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:48,294 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:29:48,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:48,857 INFO L93 Difference]: Finished difference Result 2013 states and 3055 transitions. [2022-11-03 03:29:48,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:29:48,858 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 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 119 [2022-11-03 03:29:48,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:48,862 INFO L225 Difference]: With dead ends: 2013 [2022-11-03 03:29:48,863 INFO L226 Difference]: Without dead ends: 1093 [2022-11-03 03:29:48,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:29:48,865 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 31 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:48,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 402 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 210 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2022-11-03 03:29:48,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1093 states. [2022-11-03 03:29:48,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1093 to 1022. [2022-11-03 03:29:48,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1022 states, 1021 states have (on average 1.5288932419196866) internal successors, (1561), 1021 states have internal predecessors, (1561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:48,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1022 states to 1022 states and 1561 transitions. [2022-11-03 03:29:48,918 INFO L78 Accepts]: Start accepts. Automaton has 1022 states and 1561 transitions. Word has length 119 [2022-11-03 03:29:48,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:48,918 INFO L495 AbstractCegarLoop]: Abstraction has 1022 states and 1561 transitions. [2022-11-03 03:29:48,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:48,919 INFO L276 IsEmpty]: Start isEmpty. Operand 1022 states and 1561 transitions. [2022-11-03 03:29:48,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-11-03 03:29:48,921 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:48,921 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:29:48,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-11-03 03:29:48,922 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:48,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:48,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1372364276, now seen corresponding path program 1 times [2022-11-03 03:29:48,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:29:48,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464179029] [2022-11-03 03:29:48,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:48,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:29:49,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:49,822 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 0 proven. 116 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 03:29:49,823 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:29:49,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464179029] [2022-11-03 03:29:49,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464179029] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:29:49,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787602137] [2022-11-03 03:29:49,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:49,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:29:49,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878355a6-7a0f-48ca-9351-2fbaed5ce3cc/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:29:49,825 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878355a6-7a0f-48ca-9351-2fbaed5ce3cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:29:49,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878355a6-7a0f-48ca-9351-2fbaed5ce3cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 03:29:50,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:50,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 1165 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 03:29:50,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:50,967 INFO L356 Elim1Store]: treesize reduction 33, result has 48.4 percent of original size [2022-11-03 03:29:50,968 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 124 treesize of output 107 [2022-11-03 03:29:50,979 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 92 [2022-11-03 03:29:50,996 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 62 [2022-11-03 03:29:51,149 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-03 03:29:51,166 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 03:29:51,167 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:29:51,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787602137] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:29:51,167 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:29:51,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2022-11-03 03:29:51,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385483050] [2022-11-03 03:29:51,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:29:51,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:29:51,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:29:51,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:29:51,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:29:51,169 INFO L87 Difference]: Start difference. First operand 1022 states and 1561 transitions. Second operand has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:53,183 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:29:53,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:53,859 INFO L93 Difference]: Finished difference Result 1632 states and 2466 transitions. [2022-11-03 03:29:53,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:29:53,860 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 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 121 [2022-11-03 03:29:53,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:53,865 INFO L225 Difference]: With dead ends: 1632 [2022-11-03 03:29:53,865 INFO L226 Difference]: Without dead ends: 1271 [2022-11-03 03:29:53,867 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-03 03:29:53,868 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 61 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 14 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:53,869 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 443 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 254 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2022-11-03 03:29:53,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1271 states. [2022-11-03 03:29:53,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1271 to 1143. [2022-11-03 03:29:53,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1143 states, 1142 states have (on average 1.5359019264448337) internal successors, (1754), 1142 states have internal predecessors, (1754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:53,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1143 states to 1143 states and 1754 transitions. [2022-11-03 03:29:53,945 INFO L78 Accepts]: Start accepts. Automaton has 1143 states and 1754 transitions. Word has length 121 [2022-11-03 03:29:53,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:53,945 INFO L495 AbstractCegarLoop]: Abstraction has 1143 states and 1754 transitions. [2022-11-03 03:29:53,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:53,946 INFO L276 IsEmpty]: Start isEmpty. Operand 1143 states and 1754 transitions. [2022-11-03 03:29:53,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-11-03 03:29:53,949 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:53,950 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:29:53,993 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878355a6-7a0f-48ca-9351-2fbaed5ce3cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 03:29:54,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878355a6-7a0f-48ca-9351-2fbaed5ce3cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:29:54,167 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:54,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:54,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1587106007, now seen corresponding path program 1 times [2022-11-03 03:29:54,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:29:54,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347369708] [2022-11-03 03:29:54,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:54,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:29:54,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:55,025 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 0 proven. 116 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 03:29:55,025 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:29:55,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347369708] [2022-11-03 03:29:55,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347369708] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:29:55,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190574658] [2022-11-03 03:29:55,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:55,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:29:55,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878355a6-7a0f-48ca-9351-2fbaed5ce3cc/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:29:55,031 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878355a6-7a0f-48ca-9351-2fbaed5ce3cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:29:55,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878355a6-7a0f-48ca-9351-2fbaed5ce3cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 03:29:56,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:56,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 1168 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 03:29:56,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:56,148 INFO L356 Elim1Store]: treesize reduction 33, result has 48.4 percent of original size [2022-11-03 03:29:56,149 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 124 treesize of output 107 [2022-11-03 03:29:56,156 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 92 [2022-11-03 03:29:56,168 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 62 [2022-11-03 03:29:56,315 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-03 03:29:56,330 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 03:29:56,331 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:29:56,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190574658] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:29:56,331 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:29:56,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2022-11-03 03:29:56,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848108958] [2022-11-03 03:29:56,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:29:56,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:29:56,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:29:56,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:29:56,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:29:56,333 INFO L87 Difference]: Start difference. First operand 1143 states and 1754 transitions. Second operand has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:58,346 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:29:58,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:58,981 INFO L93 Difference]: Finished difference Result 1671 states and 2528 transitions. [2022-11-03 03:29:58,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:29:58,982 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 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 122 [2022-11-03 03:29:58,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:58,987 INFO L225 Difference]: With dead ends: 1671 [2022-11-03 03:29:58,987 INFO L226 Difference]: Without dead ends: 1267 [2022-11-03 03:29:58,989 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-03 03:29:58,989 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 59 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 13 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:58,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 443 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 254 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2022-11-03 03:29:58,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2022-11-03 03:29:59,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 1142. [2022-11-03 03:29:59,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1142 states, 1141 states have (on average 1.5337423312883436) internal successors, (1750), 1141 states have internal predecessors, (1750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:59,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1142 states to 1142 states and 1750 transitions. [2022-11-03 03:29:59,052 INFO L78 Accepts]: Start accepts. Automaton has 1142 states and 1750 transitions. Word has length 122 [2022-11-03 03:29:59,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:59,052 INFO L495 AbstractCegarLoop]: Abstraction has 1142 states and 1750 transitions. [2022-11-03 03:29:59,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:59,052 INFO L276 IsEmpty]: Start isEmpty. Operand 1142 states and 1750 transitions. [2022-11-03 03:29:59,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-03 03:29:59,055 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:59,055 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:29:59,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878355a6-7a0f-48ca-9351-2fbaed5ce3cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 03:29:59,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878355a6-7a0f-48ca-9351-2fbaed5ce3cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-03 03:29:59,283 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:59,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:59,283 INFO L85 PathProgramCache]: Analyzing trace with hash 316375014, now seen corresponding path program 1 times [2022-11-03 03:29:59,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:29:59,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154365979] [2022-11-03 03:29:59,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:59,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:29:59,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:59,837 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-03 03:29:59,838 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:29:59,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154365979] [2022-11-03 03:29:59,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154365979] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:29:59,838 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:29:59,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:29:59,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292854360] [2022-11-03 03:29:59,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:29:59,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:29:59,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:29:59,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:29:59,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:29:59,840 INFO L87 Difference]: Start difference. First operand 1142 states and 1750 transitions. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:30:01,854 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:30:02,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:30:02,454 INFO L93 Difference]: Finished difference Result 2562 states and 3898 transitions. [2022-11-03 03:30:02,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:30:02,455 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 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 123 [2022-11-03 03:30:02,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:30:02,461 INFO L225 Difference]: With dead ends: 2562 [2022-11-03 03:30:02,462 INFO L226 Difference]: Without dead ends: 1432 [2022-11-03 03:30:02,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:30:02,465 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 85 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 44 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:30:02,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 244 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 234 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2022-11-03 03:30:02,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1432 states. [2022-11-03 03:30:02,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1432 to 1247. [2022-11-03 03:30:02,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1247 states, 1246 states have (on average 1.5296950240770466) internal successors, (1906), 1246 states have internal predecessors, (1906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:30:02,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1247 states to 1247 states and 1906 transitions. [2022-11-03 03:30:02,550 INFO L78 Accepts]: Start accepts. Automaton has 1247 states and 1906 transitions. Word has length 123 [2022-11-03 03:30:02,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:30:02,550 INFO L495 AbstractCegarLoop]: Abstraction has 1247 states and 1906 transitions. [2022-11-03 03:30:02,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:30:02,551 INFO L276 IsEmpty]: Start isEmpty. Operand 1247 states and 1906 transitions. [2022-11-03 03:30:02,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 03:30:02,553 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:30:02,554 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:30:02,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-11-03 03:30:02,554 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:30:02,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:30:02,555 INFO L85 PathProgramCache]: Analyzing trace with hash -909273593, now seen corresponding path program 1 times [2022-11-03 03:30:02,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:30:02,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186112642] [2022-11-03 03:30:02,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:02,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:30:02,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:03,029 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-03 03:30:03,029 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:30:03,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186112642] [2022-11-03 03:30:03,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186112642] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:30:03,030 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:30:03,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:30:03,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14566563] [2022-11-03 03:30:03,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:30:03,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:30:03,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:30:03,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:30:03,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:30:03,032 INFO L87 Difference]: Start difference. First operand 1247 states and 1906 transitions. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:30:05,052 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:30:05,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:30:05,551 INFO L93 Difference]: Finished difference Result 2610 states and 3973 transitions. [2022-11-03 03:30:05,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:30:05,552 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 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 124 [2022-11-03 03:30:05,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:30:05,556 INFO L225 Difference]: With dead ends: 2610 [2022-11-03 03:30:05,557 INFO L226 Difference]: Without dead ends: 1375 [2022-11-03 03:30:05,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:30:05,559 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 25 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:30:05,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 399 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 192 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2022-11-03 03:30:05,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1375 states. [2022-11-03 03:30:05,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1375 to 1319. [2022-11-03 03:30:05,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1319 states, 1318 states have (on average 1.528072837632777) internal successors, (2014), 1318 states have internal predecessors, (2014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:30:05,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1319 states to 1319 states and 2014 transitions. [2022-11-03 03:30:05,623 INFO L78 Accepts]: Start accepts. Automaton has 1319 states and 2014 transitions. Word has length 124 [2022-11-03 03:30:05,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:30:05,624 INFO L495 AbstractCegarLoop]: Abstraction has 1319 states and 2014 transitions. [2022-11-03 03:30:05,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:30:05,624 INFO L276 IsEmpty]: Start isEmpty. Operand 1319 states and 2014 transitions. [2022-11-03 03:30:05,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-03 03:30:05,627 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:30:05,627 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:30:05,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-11-03 03:30:05,628 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:30:05,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:30:05,628 INFO L85 PathProgramCache]: Analyzing trace with hash 693562048, now seen corresponding path program 1 times [2022-11-03 03:30:05,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:30:05,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624805285] [2022-11-03 03:30:05,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:05,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:30:05,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:06,093 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 135 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-11-03 03:30:06,094 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:30:06,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624805285] [2022-11-03 03:30:06,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624805285] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:30:06,094 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:30:06,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:30:06,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907890569] [2022-11-03 03:30:06,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:30:06,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:30:06,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:30:06,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:30:06,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:30:06,096 INFO L87 Difference]: Start difference. First operand 1319 states and 2014 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:30:08,109 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:30:08,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:30:08,535 INFO L93 Difference]: Finished difference Result 2676 states and 4072 transitions. [2022-11-03 03:30:08,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:30:08,536 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 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 130 [2022-11-03 03:30:08,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:30:08,541 INFO L225 Difference]: With dead ends: 2676 [2022-11-03 03:30:08,541 INFO L226 Difference]: Without dead ends: 1369 [2022-11-03 03:30:08,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:30:08,544 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 34 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:30:08,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 399 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 185 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2022-11-03 03:30:08,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1369 states. [2022-11-03 03:30:08,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1369 to 1319. [2022-11-03 03:30:08,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1319 states, 1318 states have (on average 1.5257966616084977) internal successors, (2011), 1318 states have internal predecessors, (2011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:30:08,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1319 states to 1319 states and 2011 transitions. [2022-11-03 03:30:08,610 INFO L78 Accepts]: Start accepts. Automaton has 1319 states and 2011 transitions. Word has length 130 [2022-11-03 03:30:08,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:30:08,610 INFO L495 AbstractCegarLoop]: Abstraction has 1319 states and 2011 transitions. [2022-11-03 03:30:08,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:30:08,611 INFO L276 IsEmpty]: Start isEmpty. Operand 1319 states and 2011 transitions. [2022-11-03 03:30:08,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-11-03 03:30:08,614 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:30:08,614 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:30:08,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-11-03 03:30:08,614 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:30:08,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:30:08,615 INFO L85 PathProgramCache]: Analyzing trace with hash -530787790, now seen corresponding path program 1 times [2022-11-03 03:30:08,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:30:08,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031845447] [2022-11-03 03:30:08,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:08,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:30:08,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:09,102 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-03 03:30:09,102 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:30:09,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031845447] [2022-11-03 03:30:09,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031845447] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:30:09,103 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:30:09,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:30:09,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089220996] [2022-11-03 03:30:09,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:30:09,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:30:09,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:30:09,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:30:09,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:30:09,105 INFO L87 Difference]: Start difference. First operand 1319 states and 2011 transitions. Second operand has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 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) [2022-11-03 03:30:11,117 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:30:11,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:30:11,749 INFO L93 Difference]: Finished difference Result 2069 states and 3121 transitions. [2022-11-03 03:30:11,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:30:11,750 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 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 132 [2022-11-03 03:30:11,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:30:11,754 INFO L225 Difference]: With dead ends: 2069 [2022-11-03 03:30:11,754 INFO L226 Difference]: Without dead ends: 1609 [2022-11-03 03:30:11,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:30:11,756 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 78 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 45 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:30:11,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 245 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 234 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2022-11-03 03:30:11,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1609 states. [2022-11-03 03:30:11,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1609 to 1440. [2022-11-03 03:30:11,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1440 states, 1439 states have (on average 1.5295343988881167) internal successors, (2201), 1439 states have internal predecessors, (2201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:30:11,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1440 states to 1440 states and 2201 transitions. [2022-11-03 03:30:11,839 INFO L78 Accepts]: Start accepts. Automaton has 1440 states and 2201 transitions. Word has length 132 [2022-11-03 03:30:11,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:30:11,840 INFO L495 AbstractCegarLoop]: Abstraction has 1440 states and 2201 transitions. [2022-11-03 03:30:11,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 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) [2022-11-03 03:30:11,840 INFO L276 IsEmpty]: Start isEmpty. Operand 1440 states and 2201 transitions. [2022-11-03 03:30:11,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-11-03 03:30:11,844 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:30:11,844 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:30:11,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-11-03 03:30:11,845 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:30:11,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:30:11,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1576033191, now seen corresponding path program 1 times [2022-11-03 03:30:11,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:30:11,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031218721] [2022-11-03 03:30:11,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:11,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:30:11,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:12,284 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 114 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-03 03:30:12,285 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:30:12,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031218721] [2022-11-03 03:30:12,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031218721] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:30:12,285 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:30:12,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:30:12,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639116060] [2022-11-03 03:30:12,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:30:12,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:30:12,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:30:12,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:30:12,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:30:12,287 INFO L87 Difference]: Start difference. First operand 1440 states and 2201 transitions. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:30:14,297 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:30:14,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:30:14,878 INFO L93 Difference]: Finished difference Result 2948 states and 4491 transitions. [2022-11-03 03:30:14,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:30:14,887 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 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 133 [2022-11-03 03:30:14,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:30:14,893 INFO L225 Difference]: With dead ends: 2948 [2022-11-03 03:30:14,894 INFO L226 Difference]: Without dead ends: 1520 [2022-11-03 03:30:14,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:30:14,897 INFO L413 NwaCegarLoop]: 156 mSDtfsCounter, 36 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:30:14,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 384 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 214 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2022-11-03 03:30:14,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2022-11-03 03:30:15,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 1440. [2022-11-03 03:30:15,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1440 states, 1439 states have (on average 1.527449617790132) internal successors, (2198), 1439 states have internal predecessors, (2198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:30:15,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1440 states to 1440 states and 2198 transitions. [2022-11-03 03:30:15,008 INFO L78 Accepts]: Start accepts. Automaton has 1440 states and 2198 transitions. Word has length 133 [2022-11-03 03:30:15,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:30:15,009 INFO L495 AbstractCegarLoop]: Abstraction has 1440 states and 2198 transitions. [2022-11-03 03:30:15,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:30:15,009 INFO L276 IsEmpty]: Start isEmpty. Operand 1440 states and 2198 transitions. [2022-11-03 03:30:15,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-11-03 03:30:15,013 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:30:15,014 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:30:15,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-11-03 03:30:15,014 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:30:15,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:30:15,015 INFO L85 PathProgramCache]: Analyzing trace with hash -943438945, now seen corresponding path program 1 times [2022-11-03 03:30:15,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:30:15,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334537438] [2022-11-03 03:30:15,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:15,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:30:15,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:15,476 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-11-03 03:30:15,477 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:30:15,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334537438] [2022-11-03 03:30:15,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334537438] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:30:15,477 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:30:15,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:30:15,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778184090] [2022-11-03 03:30:15,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:30:15,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:30:15,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:30:15,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:30:15,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:30:15,479 INFO L87 Difference]: Start difference. First operand 1440 states and 2198 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:30:17,503 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:30:18,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:30:18,042 INFO L93 Difference]: Finished difference Result 2894 states and 4413 transitions. [2022-11-03 03:30:18,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:30:18,045 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 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 138 [2022-11-03 03:30:18,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:30:18,048 INFO L225 Difference]: With dead ends: 2894 [2022-11-03 03:30:18,048 INFO L226 Difference]: Without dead ends: 1466 [2022-11-03 03:30:18,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:30:18,051 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 31 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:30:18,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 389 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 174 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2022-11-03 03:30:18,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1466 states. [2022-11-03 03:30:18,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1466 to 1440. [2022-11-03 03:30:18,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1440 states, 1439 states have (on average 1.5253648366921473) internal successors, (2195), 1439 states have internal predecessors, (2195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:30:18,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1440 states to 1440 states and 2195 transitions. [2022-11-03 03:30:18,137 INFO L78 Accepts]: Start accepts. Automaton has 1440 states and 2195 transitions. Word has length 138 [2022-11-03 03:30:18,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:30:18,138 INFO L495 AbstractCegarLoop]: Abstraction has 1440 states and 2195 transitions. [2022-11-03 03:30:18,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:30:18,138 INFO L276 IsEmpty]: Start isEmpty. Operand 1440 states and 2195 transitions. [2022-11-03 03:30:18,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-11-03 03:30:18,142 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:30:18,142 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-03 03:30:18,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-11-03 03:30:18,142 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:30:18,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:30:18,143 INFO L85 PathProgramCache]: Analyzing trace with hash 679279711, now seen corresponding path program 1 times [2022-11-03 03:30:18,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:30:18,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119573435] [2022-11-03 03:30:18,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:18,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:30:18,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:18,702 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 121 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-11-03 03:30:18,702 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:30:18,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119573435] [2022-11-03 03:30:18,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119573435] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:30:18,703 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:30:18,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:30:18,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863540786] [2022-11-03 03:30:18,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:30:18,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:30:18,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:30:18,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:30:18,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:30:18,704 INFO L87 Difference]: Start difference. First operand 1440 states and 2195 transitions. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:30:20,716 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:30:21,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:30:21,218 INFO L93 Difference]: Finished difference Result 2961 states and 4498 transitions. [2022-11-03 03:30:21,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:30:21,220 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 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 138 [2022-11-03 03:30:21,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:30:21,227 INFO L225 Difference]: With dead ends: 2961 [2022-11-03 03:30:21,228 INFO L226 Difference]: Without dead ends: 1533 [2022-11-03 03:30:21,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:30:21,230 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 15 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:30:21,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 385 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 168 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2022-11-03 03:30:21,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1533 states. [2022-11-03 03:30:21,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1533 to 1497. [2022-11-03 03:30:21,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1497 states, 1496 states have (on average 1.5193850267379678) internal successors, (2273), 1496 states have internal predecessors, (2273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:30:21,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1497 states to 1497 states and 2273 transitions. [2022-11-03 03:30:21,315 INFO L78 Accepts]: Start accepts. Automaton has 1497 states and 2273 transitions. Word has length 138 [2022-11-03 03:30:21,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:30:21,315 INFO L495 AbstractCegarLoop]: Abstraction has 1497 states and 2273 transitions. [2022-11-03 03:30:21,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:30:21,316 INFO L276 IsEmpty]: Start isEmpty. Operand 1497 states and 2273 transitions. [2022-11-03 03:30:21,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-11-03 03:30:21,319 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:30:21,320 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-03 03:30:21,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-11-03 03:30:21,320 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:30:21,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:30:21,321 INFO L85 PathProgramCache]: Analyzing trace with hash 694495081, now seen corresponding path program 1 times [2022-11-03 03:30:21,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:30:21,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837648732] [2022-11-03 03:30:21,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:21,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:30:21,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:21,891 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 141 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-03 03:30:21,892 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:30:21,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837648732] [2022-11-03 03:30:21,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837648732] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:30:21,893 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:30:21,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:30:21,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634565575] [2022-11-03 03:30:21,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:30:21,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:30:21,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:30:21,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:30:21,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:30:21,895 INFO L87 Difference]: Start difference. First operand 1497 states and 2273 transitions. Second operand has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 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) [2022-11-03 03:30:23,909 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:30:24,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:30:24,467 INFO L93 Difference]: Finished difference Result 3068 states and 4629 transitions. [2022-11-03 03:30:24,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:30:24,469 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 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 139 [2022-11-03 03:30:24,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:30:24,474 INFO L225 Difference]: With dead ends: 3068 [2022-11-03 03:30:24,474 INFO L226 Difference]: Without dead ends: 1583 [2022-11-03 03:30:24,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:30:24,477 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 39 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:30:24,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 426 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 228 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2022-11-03 03:30:24,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1583 states. [2022-11-03 03:30:24,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1583 to 1497. [2022-11-03 03:30:24,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1497 states, 1496 states have (on average 1.517379679144385) internal successors, (2270), 1496 states have internal predecessors, (2270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:30:24,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1497 states to 1497 states and 2270 transitions. [2022-11-03 03:30:24,541 INFO L78 Accepts]: Start accepts. Automaton has 1497 states and 2270 transitions. Word has length 139 [2022-11-03 03:30:24,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:30:24,541 INFO L495 AbstractCegarLoop]: Abstraction has 1497 states and 2270 transitions. [2022-11-03 03:30:24,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 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) [2022-11-03 03:30:24,541 INFO L276 IsEmpty]: Start isEmpty. Operand 1497 states and 2270 transitions. [2022-11-03 03:30:24,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-11-03 03:30:24,544 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:30:24,544 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-03 03:30:24,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-11-03 03:30:24,545 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:30:24,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:30:24,545 INFO L85 PathProgramCache]: Analyzing trace with hash -960457815, now seen corresponding path program 1 times [2022-11-03 03:30:24,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:30:24,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341453058] [2022-11-03 03:30:24,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:24,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:30:24,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:24,973 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 139 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-03 03:30:24,973 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:30:24,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341453058] [2022-11-03 03:30:24,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341453058] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:30:24,974 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:30:24,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:30:24,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498354175] [2022-11-03 03:30:24,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:30:24,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:30:24,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:30:24,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:30:24,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:30:24,976 INFO L87 Difference]: Start difference. First operand 1497 states and 2270 transitions. Second operand has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:30:26,988 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:30:27,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:30:27,527 INFO L93 Difference]: Finished difference Result 2193 states and 3290 transitions. [2022-11-03 03:30:27,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:30:27,528 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 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 139 [2022-11-03 03:30:27,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:30:27,534 INFO L225 Difference]: With dead ends: 2193 [2022-11-03 03:30:27,534 INFO L226 Difference]: Without dead ends: 1671 [2022-11-03 03:30:27,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:30:27,536 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 79 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 45 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:30:27,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 244 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 233 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2022-11-03 03:30:27,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1671 states. [2022-11-03 03:30:27,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1671 to 1383. [2022-11-03 03:30:27,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1383 states, 1382 states have (on average 1.5144717800289436) internal successors, (2093), 1382 states have internal predecessors, (2093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:30:27,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1383 states to 1383 states and 2093 transitions. [2022-11-03 03:30:27,620 INFO L78 Accepts]: Start accepts. Automaton has 1383 states and 2093 transitions. Word has length 139 [2022-11-03 03:30:27,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:30:27,620 INFO L495 AbstractCegarLoop]: Abstraction has 1383 states and 2093 transitions. [2022-11-03 03:30:27,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:30:27,621 INFO L276 IsEmpty]: Start isEmpty. Operand 1383 states and 2093 transitions. [2022-11-03 03:30:27,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-11-03 03:30:27,624 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:30:27,624 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:30:27,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-11-03 03:30:27,625 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:30:27,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:30:27,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1563539254, now seen corresponding path program 2 times [2022-11-03 03:30:27,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:30:27,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399827295] [2022-11-03 03:30:27,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:27,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:30:27,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:28,035 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 164 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-11-03 03:30:28,035 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:30:28,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399827295] [2022-11-03 03:30:28,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399827295] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:30:28,036 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:30:28,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:30:28,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054116328] [2022-11-03 03:30:28,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:30:28,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:30:28,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:30:28,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:30:28,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:30:28,039 INFO L87 Difference]: Start difference. First operand 1383 states and 2093 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:30:30,051 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:30:30,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:30:30,563 INFO L93 Difference]: Finished difference Result 2780 states and 4203 transitions. [2022-11-03 03:30:30,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:30:30,567 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 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 142 [2022-11-03 03:30:30,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:30:30,576 INFO L225 Difference]: With dead ends: 2780 [2022-11-03 03:30:30,581 INFO L226 Difference]: Without dead ends: 1409 [2022-11-03 03:30:30,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:30:30,583 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 22 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:30:30,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 387 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 174 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2022-11-03 03:30:30,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1409 states. [2022-11-03 03:30:30,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1409 to 1383. [2022-11-03 03:30:30,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1383 states, 1382 states have (on average 1.512301013024602) internal successors, (2090), 1382 states have internal predecessors, (2090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:30:30,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1383 states to 1383 states and 2090 transitions. [2022-11-03 03:30:30,666 INFO L78 Accepts]: Start accepts. Automaton has 1383 states and 2090 transitions. Word has length 142 [2022-11-03 03:30:30,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:30:30,666 INFO L495 AbstractCegarLoop]: Abstraction has 1383 states and 2090 transitions. [2022-11-03 03:30:30,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:30:30,667 INFO L276 IsEmpty]: Start isEmpty. Operand 1383 states and 2090 transitions. [2022-11-03 03:30:30,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-03 03:30:30,669 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:30:30,669 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:30:30,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-11-03 03:30:30,669 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:30:30,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:30:30,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1662121094, now seen corresponding path program 1 times [2022-11-03 03:30:30,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:30:30,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948954512] [2022-11-03 03:30:30,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:30,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:30:30,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:30,992 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 167 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-11-03 03:30:30,992 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:30:30,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948954512] [2022-11-03 03:30:30,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948954512] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:30:30,993 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:30:30,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:30:30,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627085162] [2022-11-03 03:30:30,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:30:30,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:30:30,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:30:30,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:30:30,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:30:30,994 INFO L87 Difference]: Start difference. First operand 1383 states and 2090 transitions. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:30:33,006 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:30:33,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:30:33,465 INFO L93 Difference]: Finished difference Result 2774 states and 4191 transitions. [2022-11-03 03:30:33,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:30:33,467 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 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 143 [2022-11-03 03:30:33,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:30:33,470 INFO L225 Difference]: With dead ends: 2774 [2022-11-03 03:30:33,471 INFO L226 Difference]: Without dead ends: 1403 [2022-11-03 03:30:33,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:30:33,473 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 19 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:30:33,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 385 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 169 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2022-11-03 03:30:33,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1403 states. [2022-11-03 03:30:33,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1403 to 1383. [2022-11-03 03:30:33,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1383 states, 1382 states have (on average 1.5101302460202606) internal successors, (2087), 1382 states have internal predecessors, (2087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:30:33,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1383 states to 1383 states and 2087 transitions. [2022-11-03 03:30:33,545 INFO L78 Accepts]: Start accepts. Automaton has 1383 states and 2087 transitions. Word has length 143 [2022-11-03 03:30:33,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:30:33,545 INFO L495 AbstractCegarLoop]: Abstraction has 1383 states and 2087 transitions. [2022-11-03 03:30:33,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:30:33,545 INFO L276 IsEmpty]: Start isEmpty. Operand 1383 states and 2087 transitions. [2022-11-03 03:30:33,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-11-03 03:30:33,547 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:30:33,547 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:30:33,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-11-03 03:30:33,547 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:30:33,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:30:33,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1867530934, now seen corresponding path program 1 times [2022-11-03 03:30:33,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:30:33,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704553485] [2022-11-03 03:30:33,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:33,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:30:33,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:34,054 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:30:34,054 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:30:34,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704553485] [2022-11-03 03:30:34,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704553485] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:30:34,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342201805] [2022-11-03 03:30:34,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:34,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:30:34,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878355a6-7a0f-48ca-9351-2fbaed5ce3cc/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:30:34,058 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878355a6-7a0f-48ca-9351-2fbaed5ce3cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:30:34,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878355a6-7a0f-48ca-9351-2fbaed5ce3cc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 03:30:35,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:35,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 1209 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 03:30:35,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:30:35,575 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:30:35,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:30:36,257 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-11-03 03:30:36,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342201805] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:30:36,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1087591102] [2022-11-03 03:30:36,286 INFO L159 IcfgInterpreter]: Started Sifa with 53 locations of interest [2022-11-03 03:30:36,287 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:30:36,290 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:30:36,296 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:30:36,297 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:30:39,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:39,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:40,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:40,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:41,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:41,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:41,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:41,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:42,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:42,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:42,375 INFO L244 Elim1Store]: Index analysis took 1295 ms