./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/openssl/s3_srvr.blast.12.i.cil-2.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_3267b14f-2315-444d-84a5-c99a3583648f/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3267b14f-2315-444d-84a5-c99a3583648f/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_3267b14f-2315-444d-84a5-c99a3583648f/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3267b14f-2315-444d-84a5-c99a3583648f/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.12.i.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3267b14f-2315-444d-84a5-c99a3583648f/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_3267b14f-2315-444d-84a5-c99a3583648f/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 64affc32c9ee6b1616cdbc82208fa978b35ea8d8fb3017d6636bda9ef421e017 --- 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 04:04:12,207 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 04:04:12,210 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 04:04:12,251 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 04:04:12,252 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 04:04:12,256 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 04:04:12,258 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 04:04:12,261 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 04:04:12,270 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 04:04:12,271 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 04:04:12,272 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 04:04:12,273 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 04:04:12,273 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 04:04:12,274 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 04:04:12,276 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 04:04:12,277 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 04:04:12,277 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 04:04:12,279 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 04:04:12,280 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 04:04:12,288 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 04:04:12,294 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 04:04:12,300 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 04:04:12,301 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 04:04:12,302 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 04:04:12,305 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 04:04:12,305 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 04:04:12,308 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 04:04:12,310 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 04:04:12,310 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 04:04:12,311 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 04:04:12,312 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 04:04:12,313 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 04:04:12,315 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 04:04:12,316 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 04:04:12,318 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 04:04:12,318 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 04:04:12,319 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 04:04:12,319 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 04:04:12,319 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 04:04:12,320 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 04:04:12,321 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 04:04:12,321 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3267b14f-2315-444d-84a5-c99a3583648f/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 04:04:12,361 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 04:04:12,367 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 04:04:12,368 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 04:04:12,368 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 04:04:12,369 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 04:04:12,369 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 04:04:12,370 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 04:04:12,370 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 04:04:12,370 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 04:04:12,370 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 04:04:12,372 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 04:04:12,372 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 04:04:12,372 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 04:04:12,373 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 04:04:12,373 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 04:04:12,373 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 04:04:12,373 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 04:04:12,374 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 04:04:12,374 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 04:04:12,375 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 04:04:12,375 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 04:04:12,375 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 04:04:12,375 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 04:04:12,377 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 04:04:12,377 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 04:04:12,378 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 04:04:12,378 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 04:04:12,378 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 04:04:12,378 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 04:04:12,379 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 04:04:12,379 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 04:04:12,380 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 04:04:12,380 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 04:04:12,380 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 04:04:12,380 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 04:04:12,381 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 04:04:12,381 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 04:04:12,381 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 04:04:12,381 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 04:04:12,382 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 04:04:12,382 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 04:04:12,382 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_3267b14f-2315-444d-84a5-c99a3583648f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3267b14f-2315-444d-84a5-c99a3583648f/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 64affc32c9ee6b1616cdbc82208fa978b35ea8d8fb3017d6636bda9ef421e017 [2022-11-03 04:04:12,708 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 04:04:12,739 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 04:04:12,742 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 04:04:12,743 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 04:04:12,744 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 04:04:12,745 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3267b14f-2315-444d-84a5-c99a3583648f/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/openssl/s3_srvr.blast.12.i.cil-2.c [2022-11-03 04:04:12,821 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3267b14f-2315-444d-84a5-c99a3583648f/bin/utaipan-7li7fVZpFI/data/562d74c7d/9bb579aee81e40bc9cf0557129a637e7/FLAG92e97e207 [2022-11-03 04:04:13,476 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 04:04:13,477 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3267b14f-2315-444d-84a5-c99a3583648f/sv-benchmarks/c/openssl/s3_srvr.blast.12.i.cil-2.c [2022-11-03 04:04:13,496 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3267b14f-2315-444d-84a5-c99a3583648f/bin/utaipan-7li7fVZpFI/data/562d74c7d/9bb579aee81e40bc9cf0557129a637e7/FLAG92e97e207 [2022-11-03 04:04:13,721 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3267b14f-2315-444d-84a5-c99a3583648f/bin/utaipan-7li7fVZpFI/data/562d74c7d/9bb579aee81e40bc9cf0557129a637e7 [2022-11-03 04:04:13,724 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 04:04:13,725 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 04:04:13,730 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 04:04:13,730 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 04:04:13,734 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 04:04:13,735 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:04:13" (1/1) ... [2022-11-03 04:04:13,737 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d1a2f35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:04:13, skipping insertion in model container [2022-11-03 04:04:13,738 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:04:13" (1/1) ... [2022-11-03 04:04:13,746 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 04:04:13,829 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 04:04:14,265 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_3267b14f-2315-444d-84a5-c99a3583648f/sv-benchmarks/c/openssl/s3_srvr.blast.12.i.cil-2.c[75436,75449] [2022-11-03 04:04:14,283 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 04:04:14,315 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 04:04:14,489 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_3267b14f-2315-444d-84a5-c99a3583648f/sv-benchmarks/c/openssl/s3_srvr.blast.12.i.cil-2.c[75436,75449] [2022-11-03 04:04:14,500 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 04:04:14,521 INFO L208 MainTranslator]: Completed translation [2022-11-03 04:04:14,521 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:04:14 WrapperNode [2022-11-03 04:04:14,521 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 04:04:14,522 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 04:04:14,523 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 04:04:14,523 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 04:04:14,531 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:04:14" (1/1) ... [2022-11-03 04:04:14,568 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:04:14" (1/1) ... [2022-11-03 04:04:14,654 INFO L138 Inliner]: procedures = 31, calls = 223, calls flagged for inlining = 7, calls inlined = 3, statements flattened = 798 [2022-11-03 04:04:14,655 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 04:04:14,656 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 04:04:14,657 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 04:04:14,657 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 04:04:14,668 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:04:14" (1/1) ... [2022-11-03 04:04:14,668 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:04:14" (1/1) ... [2022-11-03 04:04:14,680 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:04:14" (1/1) ... [2022-11-03 04:04:14,680 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:04:14" (1/1) ... [2022-11-03 04:04:14,714 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:04:14" (1/1) ... [2022-11-03 04:04:14,720 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:04:14" (1/1) ... [2022-11-03 04:04:14,724 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:04:14" (1/1) ... [2022-11-03 04:04:14,727 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:04:14" (1/1) ... [2022-11-03 04:04:14,733 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 04:04:14,734 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 04:04:14,734 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 04:04:14,734 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 04:04:14,735 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:04:14" (1/1) ... [2022-11-03 04:04:14,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 04:04:14,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3267b14f-2315-444d-84a5-c99a3583648f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:04:14,780 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3267b14f-2315-444d-84a5-c99a3583648f/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 04:04:14,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3267b14f-2315-444d-84a5-c99a3583648f/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 04:04:14,827 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 04:04:14,828 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-03 04:04:14,829 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 04:04:14,829 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 04:04:14,829 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-03 04:04:14,829 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 04:04:14,830 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 04:04:14,830 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 04:04:14,830 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 04:04:15,088 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 04:04:15,090 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 04:04:15,120 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-11-03 04:04:18,206 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2022-11-03 04:04:18,207 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2022-11-03 04:04:18,207 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 04:04:18,689 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 04:04:18,690 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 04:04:18,693 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:04:18 BoogieIcfgContainer [2022-11-03 04:04:18,693 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 04:04:18,696 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 04:04:18,696 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 04:04:18,700 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 04:04:18,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:04:13" (1/3) ... [2022-11-03 04:04:18,701 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10a35d0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:04:18, skipping insertion in model container [2022-11-03 04:04:18,702 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:04:14" (2/3) ... [2022-11-03 04:04:18,702 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10a35d0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:04:18, skipping insertion in model container [2022-11-03 04:04:18,702 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:04:18" (3/3) ... [2022-11-03 04:04:18,704 INFO L112 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.12.i.cil-2.c [2022-11-03 04:04:18,729 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 04:04:18,729 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 04:04:18,806 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 04:04:18,818 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;@5e6af6bc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 04:04:18,818 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 04:04:18,824 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 04:04:18,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-03 04:04:18,839 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:04:18,840 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:04:18,840 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:04:18,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:04:18,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1706217294, now seen corresponding path program 1 times [2022-11-03 04:04:18,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:04:18,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566526003] [2022-11-03 04:04:18,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:04:18,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:04:19,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:04:19,970 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 04:04:19,972 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:04:19,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566526003] [2022-11-03 04:04:19,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566526003] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:04:19,974 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:04:19,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 04:04:19,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174091270] [2022-11-03 04:04:19,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:04:19,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:04:19,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:04:20,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:04:20,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:04:20,030 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 9.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 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 04:04:22,062 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 04:04:22,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:04:22,792 INFO L93 Difference]: Finished difference Result 241 states and 416 transitions. [2022-11-03 04:04:22,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 04:04:22,796 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 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 36 [2022-11-03 04:04:22,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:04:22,812 INFO L225 Difference]: With dead ends: 241 [2022-11-03 04:04:22,813 INFO L226 Difference]: Without dead ends: 128 [2022-11-03 04:04:22,816 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 04:04:22,819 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 20 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-03 04:04:22,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 379 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 174 Invalid, 1 Unknown, 0 Unchecked, 2.7s Time] [2022-11-03 04:04:22,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-11-03 04:04:22,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 116. [2022-11-03 04:04:22,865 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 04:04:22,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 177 transitions. [2022-11-03 04:04:22,868 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 177 transitions. Word has length 36 [2022-11-03 04:04:22,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:04:22,869 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 177 transitions. [2022-11-03 04:04:22,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 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 04:04:22,869 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 177 transitions. [2022-11-03 04:04:22,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-03 04:04:22,871 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:04:22,871 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, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:04:22,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 04:04:22,872 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:04:22,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:04:22,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1148527366, now seen corresponding path program 1 times [2022-11-03 04:04:22,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:04:22,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406881618] [2022-11-03 04:04:22,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:04:22,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:04:23,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:04:23,663 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 04:04:23,663 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:04:23,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406881618] [2022-11-03 04:04:23,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406881618] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:04:23,664 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:04:23,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 04:04:23,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193869968] [2022-11-03 04:04:23,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:04:23,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:04:23,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:04:23,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:04:23,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:04:23,668 INFO L87 Difference]: Start difference. First operand 116 states and 177 transitions. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:04:25,682 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 04:04:26,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:04:26,291 INFO L93 Difference]: Finished difference Result 321 states and 488 transitions. [2022-11-03 04:04:26,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 04:04:26,292 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-11-03 04:04:26,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:04:26,293 INFO L225 Difference]: With dead ends: 321 [2022-11-03 04:04:26,293 INFO L226 Difference]: Without dead ends: 217 [2022-11-03 04:04:26,294 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 04:04:26,295 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 121 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 51 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-03 04:04:26,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 210 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 242 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2022-11-03 04:04:26,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-11-03 04:04:26,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 125. [2022-11-03 04:04:26,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.5161290322580645) internal successors, (188), 124 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 04:04:26,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 188 transitions. [2022-11-03 04:04:26,309 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 188 transitions. Word has length 46 [2022-11-03 04:04:26,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:04:26,309 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 188 transitions. [2022-11-03 04:04:26,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:04:26,310 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 188 transitions. [2022-11-03 04:04:26,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-03 04:04:26,311 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:04:26,312 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:04:26,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 04:04:26,312 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:04:26,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:04:26,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1780647146, now seen corresponding path program 1 times [2022-11-03 04:04:26,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:04:26,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651631439] [2022-11-03 04:04:26,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:04:26,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:04:26,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:04:26,896 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 04:04:26,897 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:04:26,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651631439] [2022-11-03 04:04:26,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651631439] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:04:26,897 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:04:26,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 04:04:26,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636535993] [2022-11-03 04:04:26,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:04:26,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:04:26,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:04:26,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:04:26,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:04:26,902 INFO L87 Difference]: Start difference. First operand 125 states and 188 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 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 04:04:28,913 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 04:04:29,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:04:29,360 INFO L93 Difference]: Finished difference Result 250 states and 371 transitions. [2022-11-03 04:04:29,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 04:04:29,361 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 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 47 [2022-11-03 04:04:29,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:04:29,362 INFO L225 Difference]: With dead ends: 250 [2022-11-03 04:04:29,362 INFO L226 Difference]: Without dead ends: 137 [2022-11-03 04:04:29,363 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 04:04:29,365 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 17 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-03 04:04:29,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 310 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 163 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2022-11-03 04:04:29,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-11-03 04:04:29,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 125. [2022-11-03 04:04:29,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.5080645161290323) internal successors, (187), 124 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 04:04:29,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 187 transitions. [2022-11-03 04:04:29,374 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 187 transitions. Word has length 47 [2022-11-03 04:04:29,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:04:29,375 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 187 transitions. [2022-11-03 04:04:29,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 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 04:04:29,375 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 187 transitions. [2022-11-03 04:04:29,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-03 04:04:29,377 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:04:29,377 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, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:04:29,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 04:04:29,377 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:04:29,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:04:29,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1274003510, now seen corresponding path program 1 times [2022-11-03 04:04:29,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:04:29,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544967311] [2022-11-03 04:04:29,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:04:29,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:04:29,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:04:29,842 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 04:04:29,843 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:04:29,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544967311] [2022-11-03 04:04:29,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544967311] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:04:29,843 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:04:29,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 04:04:29,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643681566] [2022-11-03 04:04:29,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:04:29,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:04:29,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:04:29,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:04:29,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:04:29,845 INFO L87 Difference]: Start difference. First operand 125 states and 187 transitions. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:04:31,858 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 04:04:32,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:04:32,249 INFO L93 Difference]: Finished difference Result 250 states and 370 transitions. [2022-11-03 04:04:32,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 04:04:32,250 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-11-03 04:04:32,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:04:32,251 INFO L225 Difference]: With dead ends: 250 [2022-11-03 04:04:32,251 INFO L226 Difference]: Without dead ends: 137 [2022-11-03 04:04:32,252 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 04:04:32,252 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 15 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-03 04:04:32,253 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 310 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 163 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2022-11-03 04:04:32,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-11-03 04:04:32,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 125. [2022-11-03 04:04:32,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.5) internal successors, (186), 124 states have internal predecessors, (186), 0 states have call successors, (0), 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 04:04:32,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 186 transitions. [2022-11-03 04:04:32,261 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 186 transitions. Word has length 48 [2022-11-03 04:04:32,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:04:32,262 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 186 transitions. [2022-11-03 04:04:32,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:04:32,262 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 186 transitions. [2022-11-03 04:04:32,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-03 04:04:32,263 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:04:32,264 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:04:32,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 04:04:32,264 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:04:32,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:04:32,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1097741351, now seen corresponding path program 1 times [2022-11-03 04:04:32,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:04:32,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068952171] [2022-11-03 04:04:32,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:04:32,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:04:32,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:04:32,775 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 04:04:32,775 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:04:32,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068952171] [2022-11-03 04:04:32,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068952171] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:04:32,776 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:04:32,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 04:04:32,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870946587] [2022-11-03 04:04:32,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:04:32,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:04:32,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:04:32,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:04:32,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:04:32,781 INFO L87 Difference]: Start difference. First operand 125 states and 186 transitions. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:04:34,794 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 04:04:35,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:04:35,358 INFO L93 Difference]: Finished difference Result 339 states and 508 transitions. [2022-11-03 04:04:35,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 04:04:35,360 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-11-03 04:04:35,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:04:35,361 INFO L225 Difference]: With dead ends: 339 [2022-11-03 04:04:35,362 INFO L226 Difference]: Without dead ends: 226 [2022-11-03 04:04:35,362 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 04:04:35,363 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 115 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 49 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-03 04:04:35,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 209 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 244 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2022-11-03 04:04:35,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2022-11-03 04:04:35,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 139. [2022-11-03 04:04:35,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 1.4927536231884058) internal successors, (206), 138 states have internal predecessors, (206), 0 states have call successors, (0), 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 04:04:35,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 206 transitions. [2022-11-03 04:04:35,375 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 206 transitions. Word has length 48 [2022-11-03 04:04:35,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:04:35,375 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 206 transitions. [2022-11-03 04:04:35,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:04:35,376 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 206 transitions. [2022-11-03 04:04:35,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-03 04:04:35,377 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:04:35,378 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:04:35,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 04:04:35,378 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:04:35,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:04:35,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1836454329, now seen corresponding path program 1 times [2022-11-03 04:04:35,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:04:35,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165219808] [2022-11-03 04:04:35,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:04:35,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:04:35,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:04:35,859 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 04:04:35,859 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:04:35,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165219808] [2022-11-03 04:04:35,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165219808] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:04:35,860 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:04:35,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 04:04:35,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270158286] [2022-11-03 04:04:35,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:04:35,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:04:35,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:04:35,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:04:35,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:04:35,868 INFO L87 Difference]: Start difference. First operand 139 states and 206 transitions. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:04:37,880 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 04:04:38,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:04:38,472 INFO L93 Difference]: Finished difference Result 358 states and 537 transitions. [2022-11-03 04:04:38,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 04:04:38,473 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-11-03 04:04:38,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:04:38,474 INFO L225 Difference]: With dead ends: 358 [2022-11-03 04:04:38,474 INFO L226 Difference]: Without dead ends: 231 [2022-11-03 04:04:38,475 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 04:04:38,475 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 114 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 50 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-03 04:04:38,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 210 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 242 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2022-11-03 04:04:38,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-11-03 04:04:38,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 146. [2022-11-03 04:04:38,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.5034482758620689) internal successors, (218), 145 states have internal predecessors, (218), 0 states have call successors, (0), 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 04:04:38,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 218 transitions. [2022-11-03 04:04:38,487 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 218 transitions. Word has length 48 [2022-11-03 04:04:38,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:04:38,487 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 218 transitions. [2022-11-03 04:04:38,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:04:38,487 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 218 transitions. [2022-11-03 04:04:38,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-03 04:04:38,489 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:04:38,489 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, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:04:38,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 04:04:38,489 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:04:38,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:04:38,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1604080071, now seen corresponding path program 1 times [2022-11-03 04:04:38,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:04:38,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590686731] [2022-11-03 04:04:38,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:04:38,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:04:38,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:04:38,929 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 04:04:38,929 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:04:38,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590686731] [2022-11-03 04:04:38,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590686731] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:04:38,929 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:04:38,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 04:04:38,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140892548] [2022-11-03 04:04:38,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:04:38,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:04:38,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:04:38,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:04:38,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:04:38,931 INFO L87 Difference]: Start difference. First operand 146 states and 218 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 3 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 04:04:40,944 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 04:04:41,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:04:41,459 INFO L93 Difference]: Finished difference Result 365 states and 548 transitions. [2022-11-03 04:04:41,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 04:04:41,462 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 3 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 49 [2022-11-03 04:04:41,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:04:41,464 INFO L225 Difference]: With dead ends: 365 [2022-11-03 04:04:41,464 INFO L226 Difference]: Without dead ends: 231 [2022-11-03 04:04:41,465 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 04:04:41,466 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 114 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 50 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-03 04:04:41,466 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 209 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 243 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2022-11-03 04:04:41,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-11-03 04:04:41,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 146. [2022-11-03 04:04:41,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.4896551724137932) internal successors, (216), 145 states have internal predecessors, (216), 0 states have call successors, (0), 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 04:04:41,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 216 transitions. [2022-11-03 04:04:41,477 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 216 transitions. Word has length 49 [2022-11-03 04:04:41,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:04:41,477 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 216 transitions. [2022-11-03 04:04:41,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 3 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 04:04:41,477 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 216 transitions. [2022-11-03 04:04:41,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-03 04:04:41,479 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:04:41,479 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, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:04:41,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-03 04:04:41,479 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:04:41,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:04:41,480 INFO L85 PathProgramCache]: Analyzing trace with hash -764589861, now seen corresponding path program 1 times [2022-11-03 04:04:41,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:04:41,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311466617] [2022-11-03 04:04:41,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:04:41,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:04:41,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:04:41,897 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 04:04:41,897 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:04:41,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311466617] [2022-11-03 04:04:41,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311466617] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:04:41,898 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:04:41,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 04:04:41,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278952399] [2022-11-03 04:04:41,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:04:41,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:04:41,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:04:41,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:04:41,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:04:41,899 INFO L87 Difference]: Start difference. First operand 146 states and 216 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 3 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 04:04:43,921 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 04:04:44,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:04:44,303 INFO L93 Difference]: Finished difference Result 290 states and 430 transitions. [2022-11-03 04:04:44,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 04:04:44,304 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 3 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 49 [2022-11-03 04:04:44,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:04:44,305 INFO L225 Difference]: With dead ends: 290 [2022-11-03 04:04:44,305 INFO L226 Difference]: Without dead ends: 156 [2022-11-03 04:04:44,305 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 04:04:44,306 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 11 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-03 04:04:44,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 314 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 159 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2022-11-03 04:04:44,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-11-03 04:04:44,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 146. [2022-11-03 04:04:44,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.4827586206896552) internal successors, (215), 145 states have internal predecessors, (215), 0 states have call successors, (0), 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 04:04:44,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 215 transitions. [2022-11-03 04:04:44,314 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 215 transitions. Word has length 49 [2022-11-03 04:04:44,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:04:44,315 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 215 transitions. [2022-11-03 04:04:44,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 3 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 04:04:44,315 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 215 transitions. [2022-11-03 04:04:44,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-03 04:04:44,317 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:04:44,317 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, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:04:44,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-03 04:04:44,317 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:04:44,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:04:44,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1779958117, now seen corresponding path program 1 times [2022-11-03 04:04:44,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:04:44,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217244857] [2022-11-03 04:04:44,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:04:44,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:04:44,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:04:44,841 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 04:04:44,842 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:04:44,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217244857] [2022-11-03 04:04:44,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217244857] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:04:44,842 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:04:44,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 04:04:44,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550778119] [2022-11-03 04:04:44,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:04:44,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:04:44,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:04:44,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:04:44,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:04:44,845 INFO L87 Difference]: Start difference. First operand 146 states and 215 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 3 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 04:04:46,857 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 04:04:47,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:04:47,373 INFO L93 Difference]: Finished difference Result 365 states and 544 transitions. [2022-11-03 04:04:47,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 04:04:47,374 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 3 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 04:04:47,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:04:47,375 INFO L225 Difference]: With dead ends: 365 [2022-11-03 04:04:47,375 INFO L226 Difference]: Without dead ends: 231 [2022-11-03 04:04:47,375 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 04:04:47,376 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 115 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 50 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-03 04:04:47,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 209 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 243 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2022-11-03 04:04:47,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-11-03 04:04:47,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 146. [2022-11-03 04:04:47,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.4620689655172414) internal successors, (212), 145 states have internal predecessors, (212), 0 states have call successors, (0), 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 04:04:47,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 212 transitions. [2022-11-03 04:04:47,385 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 212 transitions. Word has length 50 [2022-11-03 04:04:47,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:04:47,385 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 212 transitions. [2022-11-03 04:04:47,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 3 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 04:04:47,385 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 212 transitions. [2022-11-03 04:04:47,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-03 04:04:47,387 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:04:47,387 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 04:04:47,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-03 04:04:47,387 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:04:47,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:04:47,388 INFO L85 PathProgramCache]: Analyzing trace with hash 688339510, now seen corresponding path program 1 times [2022-11-03 04:04:47,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:04:47,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330146639] [2022-11-03 04:04:47,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:04:47,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:04:47,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:04:47,824 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 04:04:47,824 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:04:47,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330146639] [2022-11-03 04:04:47,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330146639] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:04:47,825 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:04:47,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:04:47,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616577782] [2022-11-03 04:04:47,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:04:47,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:04:47,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:04:47,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:04:47,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:04:47,826 INFO L87 Difference]: Start difference. First operand 146 states and 212 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 04:04:49,841 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 04:04:50,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:04:50,454 INFO L93 Difference]: Finished difference Result 381 states and 561 transitions. [2022-11-03 04:04:50,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 04:04:50,455 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 04:04:50,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:04:50,457 INFO L225 Difference]: With dead ends: 381 [2022-11-03 04:04:50,457 INFO L226 Difference]: Without dead ends: 247 [2022-11-03 04:04:50,457 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 04:04:50,458 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 87 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 44 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-03 04:04:50,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 230 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 249 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2022-11-03 04:04:50,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-11-03 04:04:50,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 183. [2022-11-03 04:04:50,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 1.510989010989011) internal successors, (275), 182 states have internal predecessors, (275), 0 states have call successors, (0), 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 04:04:50,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 275 transitions. [2022-11-03 04:04:50,470 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 275 transitions. Word has length 51 [2022-11-03 04:04:50,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:04:50,471 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 275 transitions. [2022-11-03 04:04:50,471 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 04:04:50,471 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 275 transitions. [2022-11-03 04:04:50,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-03 04:04:50,473 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:04:50,473 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, 1] [2022-11-03 04:04:50,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-03 04:04:50,480 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:04:50,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:04:50,482 INFO L85 PathProgramCache]: Analyzing trace with hash -377505805, now seen corresponding path program 1 times [2022-11-03 04:04:50,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:04:50,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18907233] [2022-11-03 04:04:50,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:04:50,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:04:50,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:04:50,922 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 04:04:50,922 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:04:50,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18907233] [2022-11-03 04:04:50,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18907233] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:04:50,922 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:04:50,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:04:50,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374494232] [2022-11-03 04:04:50,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:04:50,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:04:50,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:04:50,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:04:50,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:04:50,924 INFO L87 Difference]: Start difference. First operand 183 states and 275 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:04:52,937 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 04:04:53,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:04:53,507 INFO L93 Difference]: Finished difference Result 439 states and 665 transitions. [2022-11-03 04:04:53,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 04:04:53,508 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-11-03 04:04:53,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:04:53,510 INFO L225 Difference]: With dead ends: 439 [2022-11-03 04:04:53,510 INFO L226 Difference]: Without dead ends: 268 [2022-11-03 04:04:53,510 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 04:04:53,511 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 86 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 47 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-03 04:04:53,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 244 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 249 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2022-11-03 04:04:53,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2022-11-03 04:04:53,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 205. [2022-11-03 04:04:53,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 1.5588235294117647) internal successors, (318), 204 states have internal predecessors, (318), 0 states have call successors, (0), 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 04:04:53,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 318 transitions. [2022-11-03 04:04:53,522 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 318 transitions. Word has length 52 [2022-11-03 04:04:53,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:04:53,523 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 318 transitions. [2022-11-03 04:04:53,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:04:53,523 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 318 transitions. [2022-11-03 04:04:53,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-03 04:04:53,524 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:04:53,524 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:04:53,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-03 04:04:53,525 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:04:53,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:04:53,525 INFO L85 PathProgramCache]: Analyzing trace with hash 997173638, now seen corresponding path program 1 times [2022-11-03 04:04:53,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:04:53,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601760284] [2022-11-03 04:04:53,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:04:53,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:04:53,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:04:54,001 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:04:54,001 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:04:54,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601760284] [2022-11-03 04:04:54,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601760284] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:04:54,001 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:04:54,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:04:54,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52871560] [2022-11-03 04:04:54,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:04:54,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:04:54,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:04:54,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:04:54,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:04:54,003 INFO L87 Difference]: Start difference. First operand 205 states and 318 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 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 04:04:56,015 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 04:04:56,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:04:56,628 INFO L93 Difference]: Finished difference Result 533 states and 831 transitions. [2022-11-03 04:04:56,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 04:04:56,629 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 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 79 [2022-11-03 04:04:56,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:04:56,630 INFO L225 Difference]: With dead ends: 533 [2022-11-03 04:04:56,630 INFO L226 Difference]: Without dead ends: 340 [2022-11-03 04:04:56,631 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 04:04:56,631 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 92 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 38 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-03 04:04:56,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 236 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 245 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2022-11-03 04:04:56,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2022-11-03 04:04:56,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 265. [2022-11-03 04:04:56,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 1.5757575757575757) internal successors, (416), 264 states have internal predecessors, (416), 0 states have call successors, (0), 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 04:04:56,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 416 transitions. [2022-11-03 04:04:56,650 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 416 transitions. Word has length 79 [2022-11-03 04:04:56,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:04:56,651 INFO L495 AbstractCegarLoop]: Abstraction has 265 states and 416 transitions. [2022-11-03 04:04:56,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 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 04:04:56,651 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 416 transitions. [2022-11-03 04:04:56,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-03 04:04:56,652 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:04:56,652 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:04:56,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-03 04:04:56,653 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:04:56,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:04:56,653 INFO L85 PathProgramCache]: Analyzing trace with hash 798400907, now seen corresponding path program 1 times [2022-11-03 04:04:56,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:04:56,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539341040] [2022-11-03 04:04:56,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:04:56,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:04:56,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:04:57,140 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:04:57,140 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:04:57,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539341040] [2022-11-03 04:04:57,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539341040] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:04:57,140 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:04:57,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:04:57,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530436839] [2022-11-03 04:04:57,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:04:57,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:04:57,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:04:57,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:04:57,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:04:57,142 INFO L87 Difference]: Start difference. First operand 265 states and 416 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:04:59,155 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 04:04:59,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:04:59,742 INFO L93 Difference]: Finished difference Result 619 states and 966 transitions. [2022-11-03 04:04:59,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 04:04:59,743 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2022-11-03 04:04:59,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:04:59,744 INFO L225 Difference]: With dead ends: 619 [2022-11-03 04:04:59,745 INFO L226 Difference]: Without dead ends: 366 [2022-11-03 04:04:59,745 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 04:04:59,746 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 88 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 46 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-03 04:04:59,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 230 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 248 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2022-11-03 04:04:59,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2022-11-03 04:04:59,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 300. [2022-11-03 04:04:59,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 1.5819397993311037) internal successors, (473), 299 states have internal predecessors, (473), 0 states have call successors, (0), 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 04:04:59,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 473 transitions. [2022-11-03 04:04:59,786 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 473 transitions. Word has length 84 [2022-11-03 04:04:59,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:04:59,786 INFO L495 AbstractCegarLoop]: Abstraction has 300 states and 473 transitions. [2022-11-03 04:04:59,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:04:59,787 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 473 transitions. [2022-11-03 04:04:59,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-11-03 04:04:59,788 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:04:59,788 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:04:59,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-03 04:04:59,789 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:04:59,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:04:59,789 INFO L85 PathProgramCache]: Analyzing trace with hash 766749710, now seen corresponding path program 1 times [2022-11-03 04:04:59,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:04:59,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51951873] [2022-11-03 04:04:59,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:04:59,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:04:59,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:05:00,241 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:05:00,242 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:05:00,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51951873] [2022-11-03 04:05:00,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51951873] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:05:00,242 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:05:00,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:05:00,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524232009] [2022-11-03 04:05:00,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:05:00,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:05:00,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:05:00,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:05:00,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:05:00,245 INFO L87 Difference]: Start difference. First operand 300 states and 473 transitions. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 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 04:05:02,258 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 04:05:02,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:05:02,871 INFO L93 Difference]: Finished difference Result 651 states and 1017 transitions. [2022-11-03 04:05:02,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 04:05:02,872 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 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 85 [2022-11-03 04:05:02,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:05:02,873 INFO L225 Difference]: With dead ends: 651 [2022-11-03 04:05:02,874 INFO L226 Difference]: Without dead ends: 363 [2022-11-03 04:05:02,874 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 04:05:02,875 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 87 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 48 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-03 04:05:02,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 230 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 247 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2022-11-03 04:05:02,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2022-11-03 04:05:02,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 300. [2022-11-03 04:05:02,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 1.5752508361204014) internal successors, (471), 299 states have internal predecessors, (471), 0 states have call successors, (0), 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 04:05:02,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 471 transitions. [2022-11-03 04:05:02,891 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 471 transitions. Word has length 85 [2022-11-03 04:05:02,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:05:02,892 INFO L495 AbstractCegarLoop]: Abstraction has 300 states and 471 transitions. [2022-11-03 04:05:02,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 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 04:05:02,893 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 471 transitions. [2022-11-03 04:05:02,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-11-03 04:05:02,894 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:05:02,894 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:05:02,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-03 04:05:02,894 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:05:02,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:05:02,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1537460516, now seen corresponding path program 1 times [2022-11-03 04:05:02,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:05:02,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421471238] [2022-11-03 04:05:02,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:05:02,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:05:02,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:05:03,293 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 04:05:03,294 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:05:03,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421471238] [2022-11-03 04:05:03,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421471238] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:05:03,295 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:05:03,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:05:03,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750078713] [2022-11-03 04:05:03,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:05:03,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:05:03,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:05:03,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:05:03,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:05:03,297 INFO L87 Difference]: Start difference. First operand 300 states and 471 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 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 04:05:05,309 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 04:05:05,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:05:05,725 INFO L93 Difference]: Finished difference Result 620 states and 974 transitions. [2022-11-03 04:05:05,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 04:05:05,726 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2022-11-03 04:05:05,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:05:05,728 INFO L225 Difference]: With dead ends: 620 [2022-11-03 04:05:05,728 INFO L226 Difference]: Without dead ends: 332 [2022-11-03 04:05:05,729 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 04:05:05,729 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 18 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-03 04:05:05,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 323 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 174 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2022-11-03 04:05:05,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2022-11-03 04:05:05,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 320. [2022-11-03 04:05:05,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 1.567398119122257) internal successors, (500), 319 states have internal predecessors, (500), 0 states have call successors, (0), 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 04:05:05,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 500 transitions. [2022-11-03 04:05:05,748 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 500 transitions. Word has length 90 [2022-11-03 04:05:05,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:05:05,749 INFO L495 AbstractCegarLoop]: Abstraction has 320 states and 500 transitions. [2022-11-03 04:05:05,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 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 04:05:05,749 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 500 transitions. [2022-11-03 04:05:05,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-03 04:05:05,751 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:05:05,751 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:05:05,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-03 04:05:05,751 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:05:05,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:05:05,752 INFO L85 PathProgramCache]: Analyzing trace with hash 758241920, now seen corresponding path program 1 times [2022-11-03 04:05:05,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:05:05,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262687931] [2022-11-03 04:05:05,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:05:05,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:05:05,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:05:06,442 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-03 04:05:06,443 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:05:06,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262687931] [2022-11-03 04:05:06,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262687931] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:05:06,445 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:05:06,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 04:05:06,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441481589] [2022-11-03 04:05:06,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:05:06,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:05:06,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:05:06,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:05:06,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:05:06,447 INFO L87 Difference]: Start difference. First operand 320 states and 500 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 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 04:05:08,460 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 04:05:09,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:05:09,014 INFO L93 Difference]: Finished difference Result 636 states and 998 transitions. [2022-11-03 04:05:09,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 04:05:09,016 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 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 101 [2022-11-03 04:05:09,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:05:09,017 INFO L225 Difference]: With dead ends: 636 [2022-11-03 04:05:09,018 INFO L226 Difference]: Without dead ends: 328 [2022-11-03 04:05:09,018 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 04:05:09,019 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 118 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 31 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-03 04:05:09,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 222 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 280 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2022-11-03 04:05:09,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-11-03 04:05:09,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 327. [2022-11-03 04:05:09,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 1.5582822085889572) internal successors, (508), 326 states have internal predecessors, (508), 0 states have call successors, (0), 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 04:05:09,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 508 transitions. [2022-11-03 04:05:09,035 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 508 transitions. Word has length 101 [2022-11-03 04:05:09,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:05:09,036 INFO L495 AbstractCegarLoop]: Abstraction has 327 states and 508 transitions. [2022-11-03 04:05:09,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 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 04:05:09,036 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 508 transitions. [2022-11-03 04:05:09,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-03 04:05:09,038 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:05:09,038 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:05:09,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-03 04:05:09,038 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:05:09,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:05:09,039 INFO L85 PathProgramCache]: Analyzing trace with hash -2089468655, now seen corresponding path program 1 times [2022-11-03 04:05:09,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:05:09,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262680422] [2022-11-03 04:05:09,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:05:09,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:05:09,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:05:09,555 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-03 04:05:09,556 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:05:09,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262680422] [2022-11-03 04:05:09,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262680422] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:05:09,556 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:05:09,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:05:09,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578791556] [2022-11-03 04:05:09,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:05:09,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:05:09,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:05:09,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:05:09,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:05:09,558 INFO L87 Difference]: Start difference. First operand 327 states and 508 transitions. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 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 04:05:11,571 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 04:05:12,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:05:12,102 INFO L93 Difference]: Finished difference Result 705 states and 1086 transitions. [2022-11-03 04:05:12,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 04:05:12,104 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 102 [2022-11-03 04:05:12,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:05:12,106 INFO L225 Difference]: With dead ends: 705 [2022-11-03 04:05:12,106 INFO L226 Difference]: Without dead ends: 390 [2022-11-03 04:05:12,107 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 04:05:12,107 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 112 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 46 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-03 04:05:12,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 236 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 246 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2022-11-03 04:05:12,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2022-11-03 04:05:12,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 327. [2022-11-03 04:05:12,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 1.5368098159509203) internal successors, (501), 326 states have internal predecessors, (501), 0 states have call successors, (0), 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 04:05:12,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 501 transitions. [2022-11-03 04:05:12,125 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 501 transitions. Word has length 102 [2022-11-03 04:05:12,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:05:12,125 INFO L495 AbstractCegarLoop]: Abstraction has 327 states and 501 transitions. [2022-11-03 04:05:12,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 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 04:05:12,126 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 501 transitions. [2022-11-03 04:05:12,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-11-03 04:05:12,127 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:05:12,127 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 04:05:12,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-03 04:05:12,128 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:05:12,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:05:12,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1262223801, now seen corresponding path program 1 times [2022-11-03 04:05:12,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:05:12,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763318605] [2022-11-03 04:05:12,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:05:12,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:05:12,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:05:12,660 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-03 04:05:12,660 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:05:12,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763318605] [2022-11-03 04:05:12,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763318605] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:05:12,661 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:05:12,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:05:12,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311238709] [2022-11-03 04:05:12,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:05:12,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:05:12,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:05:12,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:05:12,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:05:12,662 INFO L87 Difference]: Start difference. First operand 327 states and 501 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 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 04:05:14,676 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 04:05:15,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:05:15,259 INFO L93 Difference]: Finished difference Result 705 states and 1072 transitions. [2022-11-03 04:05:15,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 04:05:15,260 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 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 103 [2022-11-03 04:05:15,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:05:15,262 INFO L225 Difference]: With dead ends: 705 [2022-11-03 04:05:15,262 INFO L226 Difference]: Without dead ends: 390 [2022-11-03 04:05:15,263 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 04:05:15,263 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 110 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 46 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-03 04:05:15,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 236 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 246 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2022-11-03 04:05:15,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2022-11-03 04:05:15,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 327. [2022-11-03 04:05:15,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 1.5153374233128833) internal successors, (494), 326 states have internal predecessors, (494), 0 states have call successors, (0), 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 04:05:15,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 494 transitions. [2022-11-03 04:05:15,281 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 494 transitions. Word has length 103 [2022-11-03 04:05:15,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:05:15,282 INFO L495 AbstractCegarLoop]: Abstraction has 327 states and 494 transitions. [2022-11-03 04:05:15,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 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 04:05:15,282 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 494 transitions. [2022-11-03 04:05:15,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-11-03 04:05:15,283 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:05:15,283 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 04:05:15,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-03 04:05:15,284 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:05:15,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:05:15,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1044835626, now seen corresponding path program 1 times [2022-11-03 04:05:15,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:05:15,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643988036] [2022-11-03 04:05:15,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:05:15,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:05:15,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:05:15,766 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-03 04:05:15,766 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:05:15,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643988036] [2022-11-03 04:05:15,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643988036] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:05:15,766 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:05:15,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:05:15,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062512899] [2022-11-03 04:05:15,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:05:15,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:05:15,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:05:15,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:05:15,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:05:15,769 INFO L87 Difference]: Start difference. First operand 327 states and 494 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 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 04:05:17,785 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 04:05:18,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:05:18,342 INFO L93 Difference]: Finished difference Result 697 states and 1049 transitions. [2022-11-03 04:05:18,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 04:05:18,342 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 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 104 [2022-11-03 04:05:18,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:05:18,344 INFO L225 Difference]: With dead ends: 697 [2022-11-03 04:05:18,344 INFO L226 Difference]: Without dead ends: 382 [2022-11-03 04:05:18,345 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 04:05:18,346 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 104 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 41 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-03 04:05:18,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 244 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 238 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2022-11-03 04:05:18,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2022-11-03 04:05:18,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 327. [2022-11-03 04:05:18,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 1.4938650306748467) internal successors, (487), 326 states have internal predecessors, (487), 0 states have call successors, (0), 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 04:05:18,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 487 transitions. [2022-11-03 04:05:18,365 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 487 transitions. Word has length 104 [2022-11-03 04:05:18,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:05:18,366 INFO L495 AbstractCegarLoop]: Abstraction has 327 states and 487 transitions. [2022-11-03 04:05:18,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 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 04:05:18,366 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 487 transitions. [2022-11-03 04:05:18,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-03 04:05:18,367 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:05:18,368 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, 1] [2022-11-03 04:05:18,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-03 04:05:18,368 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:05:18,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:05:18,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1354736211, now seen corresponding path program 1 times [2022-11-03 04:05:18,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:05:18,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636421711] [2022-11-03 04:05:18,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:05:18,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:05:18,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:05:18,949 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-03 04:05:18,949 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:05:18,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636421711] [2022-11-03 04:05:18,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636421711] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:05:18,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41286890] [2022-11-03 04:05:18,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:05:18,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:05:18,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3267b14f-2315-444d-84a5-c99a3583648f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:05:18,958 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3267b14f-2315-444d-84a5-c99a3583648f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:05:18,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3267b14f-2315-444d-84a5-c99a3583648f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 04:05:19,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:05:19,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 1063 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 04:05:19,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:05:20,082 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-03 04:05:20,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:05:20,663 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-03 04:05:20,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41286890] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:05:20,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2002384977] [2022-11-03 04:05:20,687 INFO L159 IcfgInterpreter]: Started Sifa with 50 locations of interest [2022-11-03 04:05:20,687 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 04:05:20,691 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 04:05:20,697 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 04:05:20,697 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 04:05:22,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:05:22,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:05:22,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:05:23,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:05:24,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:05:24,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:05:24,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:05:24,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:05:25,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:05:25,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:05:25,402 INFO L244 Elim1Store]: Index analysis took 1522 ms