./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ntdrivers/cdaudio.i.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbca4e56-a55d-43e4-95ff-f0e4470ba6e3/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbca4e56-a55d-43e4-95ff-f0e4470ba6e3/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbca4e56-a55d-43e4-95ff-f0e4470ba6e3/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbca4e56-a55d-43e4-95ff-f0e4470ba6e3/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/ntdrivers/cdaudio.i.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbca4e56-a55d-43e4-95ff-f0e4470ba6e3/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbca4e56-a55d-43e4-95ff-f0e4470ba6e3/bin/utaipan-Q6hlc19bkW --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 ad0884018313fc350052496ea1071e31a8b2c3997d36767afc87946a21697816 --- 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-4e7fbc6 [2022-11-23 15:59:03,288 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 15:59:03,290 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 15:59:03,321 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 15:59:03,324 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 15:59:03,328 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 15:59:03,330 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 15:59:03,336 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 15:59:03,339 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 15:59:03,342 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 15:59:03,344 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 15:59:03,346 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 15:59:03,347 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 15:59:03,354 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 15:59:03,355 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 15:59:03,357 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 15:59:03,359 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 15:59:03,360 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 15:59:03,362 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 15:59:03,364 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 15:59:03,365 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 15:59:03,367 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 15:59:03,372 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 15:59:03,373 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 15:59:03,374 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 15:59:03,375 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 15:59:03,375 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 15:59:03,376 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 15:59:03,376 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 15:59:03,377 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 15:59:03,377 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 15:59:03,378 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 15:59:03,379 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 15:59:03,380 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 15:59:03,381 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 15:59:03,381 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 15:59:03,382 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 15:59:03,382 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 15:59:03,382 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 15:59:03,383 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 15:59:03,384 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 15:59:03,385 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbca4e56-a55d-43e4-95ff-f0e4470ba6e3/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 15:59:03,405 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 15:59:03,405 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 15:59:03,406 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 15:59:03,406 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 15:59:03,407 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 15:59:03,407 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 15:59:03,407 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 15:59:03,408 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 15:59:03,408 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 15:59:03,408 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 15:59:03,408 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 15:59:03,408 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 15:59:03,409 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 15:59:03,409 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 15:59:03,409 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 15:59:03,409 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 15:59:03,410 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 15:59:03,410 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 15:59:03,411 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 15:59:03,411 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 15:59:03,411 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 15:59:03,411 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 15:59:03,412 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 15:59:03,412 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 15:59:03,412 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 15:59:03,412 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 15:59:03,413 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 15:59:03,413 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 15:59:03,413 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 15:59:03,413 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 15:59:03,413 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 15:59:03,414 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 15:59:03,414 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:59:03,414 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 15:59:03,414 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 15:59:03,414 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 15:59:03,415 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 15:59:03,415 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 15:59:03,415 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 15:59:03,415 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 15:59:03,415 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 15:59:03,415 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_cbca4e56-a55d-43e4-95ff-f0e4470ba6e3/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbca4e56-a55d-43e4-95ff-f0e4470ba6e3/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ad0884018313fc350052496ea1071e31a8b2c3997d36767afc87946a21697816 [2022-11-23 15:59:03,731 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 15:59:03,763 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 15:59:03,766 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 15:59:03,768 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 15:59:03,768 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 15:59:03,770 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbca4e56-a55d-43e4-95ff-f0e4470ba6e3/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/ntdrivers/cdaudio.i.cil-1.c [2022-11-23 15:59:06,819 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 15:59:07,305 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 15:59:07,306 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbca4e56-a55d-43e4-95ff-f0e4470ba6e3/sv-benchmarks/c/ntdrivers/cdaudio.i.cil-1.c [2022-11-23 15:59:07,360 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbca4e56-a55d-43e4-95ff-f0e4470ba6e3/bin/utaipan-Q6hlc19bkW/data/2ff5d3e74/ebf0986b25544b36b3730d378c77c041/FLAG1333ed8ea [2022-11-23 15:59:07,382 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbca4e56-a55d-43e4-95ff-f0e4470ba6e3/bin/utaipan-Q6hlc19bkW/data/2ff5d3e74/ebf0986b25544b36b3730d378c77c041 [2022-11-23 15:59:07,387 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 15:59:07,389 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 15:59:07,393 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 15:59:07,393 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 15:59:07,397 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 15:59:07,398 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:59:07" (1/1) ... [2022-11-23 15:59:07,399 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3be1d584 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:59:07, skipping insertion in model container [2022-11-23 15:59:07,400 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:59:07" (1/1) ... [2022-11-23 15:59:07,408 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 15:59:07,540 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 15:59:08,316 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbca4e56-a55d-43e4-95ff-f0e4470ba6e3/sv-benchmarks/c/ntdrivers/cdaudio.i.cil-1.c[90162,90175] [2022-11-23 15:59:09,154 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:59:09,166 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 15:59:09,277 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbca4e56-a55d-43e4-95ff-f0e4470ba6e3/sv-benchmarks/c/ntdrivers/cdaudio.i.cil-1.c[90162,90175] [2022-11-23 15:59:09,653 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:59:09,689 INFO L208 MainTranslator]: Completed translation [2022-11-23 15:59:09,689 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:59:09 WrapperNode [2022-11-23 15:59:09,690 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 15:59:09,691 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 15:59:09,691 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 15:59:09,691 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 15:59:09,699 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:59:09" (1/1) ... [2022-11-23 15:59:09,760 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:59:09" (1/1) ... [2022-11-23 15:59:09,852 INFO L138 Inliner]: procedures = 120, calls = 2195, calls flagged for inlining = 23, calls inlined = 19, statements flattened = 2336 [2022-11-23 15:59:09,852 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 15:59:09,853 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 15:59:09,853 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 15:59:09,854 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 15:59:09,864 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:59:09" (1/1) ... [2022-11-23 15:59:09,865 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:59:09" (1/1) ... [2022-11-23 15:59:09,878 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:59:09" (1/1) ... [2022-11-23 15:59:09,879 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:59:09" (1/1) ... [2022-11-23 15:59:09,993 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:59:09" (1/1) ... [2022-11-23 15:59:10,006 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:59:09" (1/1) ... [2022-11-23 15:59:10,017 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:59:09" (1/1) ... [2022-11-23 15:59:10,027 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:59:09" (1/1) ... [2022-11-23 15:59:10,045 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 15:59:10,046 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 15:59:10,046 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 15:59:10,046 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 15:59:10,047 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:59:09" (1/1) ... [2022-11-23 15:59:10,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:59:10,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbca4e56-a55d-43e4-95ff-f0e4470ba6e3/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:59:10,080 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbca4e56-a55d-43e4-95ff-f0e4470ba6e3/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 15:59:10,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbca4e56-a55d-43e4-95ff-f0e4470ba6e3/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 15:59:10,136 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-11-23 15:59:10,136 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-11-23 15:59:10,137 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-23 15:59:10,137 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 15:59:10,137 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2022-11-23 15:59:10,137 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2022-11-23 15:59:10,137 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-11-23 15:59:10,138 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-11-23 15:59:10,138 INFO L130 BoogieDeclarations]: Found specification of procedure MmLockPagableDataSection [2022-11-23 15:59:10,138 INFO L138 BoogieDeclarations]: Found implementation of procedure MmLockPagableDataSection [2022-11-23 15:59:10,138 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 15:59:10,138 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioIsPlayActive [2022-11-23 15:59:10,139 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioIsPlayActive [2022-11-23 15:59:10,139 INFO L130 BoogieDeclarations]: Found specification of procedure IoOpenDeviceRegistryKey [2022-11-23 15:59:10,139 INFO L138 BoogieDeclarations]: Found implementation of procedure IoOpenDeviceRegistryKey [2022-11-23 15:59:10,139 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2022-11-23 15:59:10,139 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2022-11-23 15:59:10,140 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-11-23 15:59:10,140 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-11-23 15:59:10,140 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_malloc [2022-11-23 15:59:10,140 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_malloc [2022-11-23 15:59:10,141 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2022-11-23 15:59:10,141 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2022-11-23 15:59:10,142 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-23 15:59:10,142 INFO L130 BoogieDeclarations]: Found specification of procedure ZwClose [2022-11-23 15:59:10,143 INFO L138 BoogieDeclarations]: Found implementation of procedure ZwClose [2022-11-23 15:59:10,143 INFO L130 BoogieDeclarations]: Found specification of procedure SendSrbSynchronous [2022-11-23 15:59:10,143 INFO L138 BoogieDeclarations]: Found implementation of procedure SendSrbSynchronous [2022-11-23 15:59:10,143 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 15:59:10,144 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-23 15:59:10,145 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 15:59:10,145 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2022-11-23 15:59:10,146 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2022-11-23 15:59:10,146 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2022-11-23 15:59:10,146 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-23 15:59:10,146 INFO L130 BoogieDeclarations]: Found specification of procedure KeSetEvent [2022-11-23 15:59:10,147 INFO L138 BoogieDeclarations]: Found implementation of procedure KeSetEvent [2022-11-23 15:59:10,147 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioSignalCompletion [2022-11-23 15:59:10,147 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioSignalCompletion [2022-11-23 15:59:10,147 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 15:59:10,147 INFO L130 BoogieDeclarations]: Found specification of procedure KeWaitForSingleObject [2022-11-23 15:59:10,148 INFO L138 BoogieDeclarations]: Found implementation of procedure KeWaitForSingleObject [2022-11-23 15:59:10,148 INFO L130 BoogieDeclarations]: Found specification of procedure HPCdrCompletion [2022-11-23 15:59:10,148 INFO L138 BoogieDeclarations]: Found implementation of procedure HPCdrCompletion [2022-11-23 15:59:10,148 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 15:59:10,148 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioSendToNextDriver [2022-11-23 15:59:10,149 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioSendToNextDriver [2022-11-23 15:59:10,149 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-11-23 15:59:10,150 INFO L130 BoogieDeclarations]: Found specification of procedure ExAllocatePoolWithTag [2022-11-23 15:59:10,150 INFO L138 BoogieDeclarations]: Found implementation of procedure ExAllocatePoolWithTag [2022-11-23 15:59:10,151 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 15:59:10,151 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 15:59:10,151 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioForwardIrpSynchronous [2022-11-23 15:59:10,151 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioForwardIrpSynchronous [2022-11-23 15:59:10,758 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 15:59:10,761 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 15:59:11,084 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-11-23 15:59:11,113 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume !false; [2022-11-23 15:59:11,116 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume false; [2022-11-23 15:59:11,784 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-11-23 15:59:11,820 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##21: assume !false; [2022-11-23 15:59:11,820 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##20: assume false; [2022-11-23 15:59:11,866 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-11-23 15:59:11,868 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-11-23 15:59:11,872 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-11-23 15:59:11,887 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-11-23 15:59:11,897 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-11-23 15:59:11,907 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-11-23 15:59:26,413 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##276: assume false; [2022-11-23 15:59:26,414 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##277: assume !false; [2022-11-23 15:59:26,414 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##504: assume !false; [2022-11-23 15:59:26,414 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##503: assume false; [2022-11-23 15:59:26,414 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint L3709: CdAudioPnp_#res#1 := 0; [2022-11-23 15:59:26,414 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##172: assume !false; [2022-11-23 15:59:26,414 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##171: assume false; [2022-11-23 15:59:26,414 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##65: assume !false; [2022-11-23 15:59:26,415 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##64: assume false; [2022-11-23 15:59:26,415 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##43: assume !false; [2022-11-23 15:59:26,415 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##42: assume false; [2022-11-23 15:59:26,415 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##32: assume false; [2022-11-23 15:59:26,415 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##33: assume !false; [2022-11-23 15:59:26,463 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-11-23 15:59:26,469 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-11-23 15:59:26,469 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-11-23 15:59:26,495 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 15:59:27,184 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 15:59:27,184 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-23 15:59:27,188 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:59:27 BoogieIcfgContainer [2022-11-23 15:59:27,188 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 15:59:27,190 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 15:59:27,191 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 15:59:27,194 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 15:59:27,194 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:59:07" (1/3) ... [2022-11-23 15:59:27,195 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bc39ffd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:59:27, skipping insertion in model container [2022-11-23 15:59:27,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:59:09" (2/3) ... [2022-11-23 15:59:27,195 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bc39ffd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:59:27, skipping insertion in model container [2022-11-23 15:59:27,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:59:27" (3/3) ... [2022-11-23 15:59:27,197 INFO L112 eAbstractionObserver]: Analyzing ICFG cdaudio.i.cil-1.c [2022-11-23 15:59:27,217 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 15:59:27,218 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 15:59:27,276 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 15:59:27,283 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;@78276758, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 15:59:27,284 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 15:59:27,294 INFO L276 IsEmpty]: Start isEmpty. Operand has 488 states, 354 states have (on average 1.536723163841808) internal successors, (544), 373 states have internal predecessors, (544), 113 states have call successors, (113), 19 states have call predecessors, (113), 19 states have return successors, (113), 108 states have call predecessors, (113), 113 states have call successors, (113) [2022-11-23 15:59:27,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-23 15:59:27,303 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:59:27,305 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:59:27,306 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:59:27,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:59:27,317 INFO L85 PathProgramCache]: Analyzing trace with hash -2107210722, now seen corresponding path program 1 times [2022-11-23 15:59:27,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:59:27,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357588335] [2022-11-23 15:59:27,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:59:27,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:59:27,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:59:27,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:59:27,905 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:59:27,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357588335] [2022-11-23 15:59:27,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357588335] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:59:27,907 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:59:27,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:59:27,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331548092] [2022-11-23 15:59:27,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:59:27,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:59:27,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:59:27,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:59:27,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:59:27,957 INFO L87 Difference]: Start difference. First operand has 488 states, 354 states have (on average 1.536723163841808) internal successors, (544), 373 states have internal predecessors, (544), 113 states have call successors, (113), 19 states have call predecessors, (113), 19 states have return successors, (113), 108 states have call predecessors, (113), 113 states have call successors, (113) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:59:31,214 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 [] [2022-11-23 15:59:34,764 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:59:37,123 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:59:39,104 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:59:41,122 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:59:43,136 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:59:45,152 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:59:45,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:59:45,166 INFO L93 Difference]: Finished difference Result 1049 states and 1671 transitions. [2022-11-23 15:59:45,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:59:45,169 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-23 15:59:45,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:59:45,186 INFO L225 Difference]: With dead ends: 1049 [2022-11-23 15:59:45,186 INFO L226 Difference]: Without dead ends: 675 [2022-11-23 15:59:45,192 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:59:45,195 INFO L413 NwaCegarLoop]: 893 mSDtfsCounter, 608 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 16 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 608 SdHoareTripleChecker+Valid, 1221 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:59:45,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [608 Valid, 1221 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 178 Invalid, 6 Unknown, 0 Unchecked, 17.1s Time] [2022-11-23 15:59:45,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2022-11-23 15:59:45,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 668. [2022-11-23 15:59:45,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 668 states, 494 states have (on average 1.4959514170040487) internal successors, (739), 507 states have internal predecessors, (739), 143 states have call successors, (143), 33 states have call predecessors, (143), 30 states have return successors, (136), 129 states have call predecessors, (136), 131 states have call successors, (136) [2022-11-23 15:59:45,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 1018 transitions. [2022-11-23 15:59:45,348 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 1018 transitions. Word has length 12 [2022-11-23 15:59:45,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:59:45,349 INFO L495 AbstractCegarLoop]: Abstraction has 668 states and 1018 transitions. [2022-11-23 15:59:45,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:59:45,349 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 1018 transitions. [2022-11-23 15:59:45,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-23 15:59:45,351 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:59:45,352 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:59:45,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 15:59:45,353 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:59:45,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:59:45,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1251723392, now seen corresponding path program 1 times [2022-11-23 15:59:45,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:59:45,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996611170] [2022-11-23 15:59:45,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:59:45,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:59:45,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:59:45,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:59:45,505 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:59:45,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996611170] [2022-11-23 15:59:45,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996611170] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:59:45,506 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:59:45,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:59:45,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094873590] [2022-11-23 15:59:45,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:59:45,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:59:45,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:59:45,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:59:45,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:59:45,510 INFO L87 Difference]: Start difference. First operand 668 states and 1018 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:59:47,718 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:59:51,278 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:59:53,310 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:59:55,417 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:59:57,635 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:59:59,252 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:00:01,531 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 [] [2022-11-23 16:00:01,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:00:01,532 INFO L93 Difference]: Finished difference Result 687 states and 1043 transitions. [2022-11-23 16:00:01,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:00:01,541 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-23 16:00:01,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:00:01,546 INFO L225 Difference]: With dead ends: 687 [2022-11-23 16:00:01,546 INFO L226 Difference]: Without dead ends: 668 [2022-11-23 16:00:01,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:00:01,548 INFO L413 NwaCegarLoop]: 654 mSDtfsCounter, 9 mSDsluCounter, 620 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 1 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 1274 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.0s IncrementalHoareTripleChecker+Time [2022-11-23 16:00:01,549 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 1274 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 172 Invalid, 5 Unknown, 0 Unchecked, 16.0s Time] [2022-11-23 16:00:01,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2022-11-23 16:00:01,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 668. [2022-11-23 16:00:01,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 668 states, 494 states have (on average 1.4939271255060729) internal successors, (738), 507 states have internal predecessors, (738), 143 states have call successors, (143), 33 states have call predecessors, (143), 30 states have return successors, (136), 129 states have call predecessors, (136), 131 states have call successors, (136) [2022-11-23 16:00:01,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 1017 transitions. [2022-11-23 16:00:01,624 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 1017 transitions. Word has length 14 [2022-11-23 16:00:01,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:00:01,624 INFO L495 AbstractCegarLoop]: Abstraction has 668 states and 1017 transitions. [2022-11-23 16:00:01,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:00:01,625 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 1017 transitions. [2022-11-23 16:00:01,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-23 16:00:01,633 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:00:01,633 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:00:01,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 16:00:01,634 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:00:01,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:00:01,636 INFO L85 PathProgramCache]: Analyzing trace with hash -975879627, now seen corresponding path program 1 times [2022-11-23 16:00:01,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:00:01,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162454103] [2022-11-23 16:00:01,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:00:01,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:00:01,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:00:01,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:00:01,791 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:00:01,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162454103] [2022-11-23 16:00:01,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162454103] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:00:01,792 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:00:01,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 16:00:01,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966364992] [2022-11-23 16:00:01,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:00:01,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:00:01,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:00:01,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:00:01,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:00:01,795 INFO L87 Difference]: Start difference. First operand 668 states and 1017 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:00:04,011 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 [] [2022-11-23 16:00:07,544 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:00:10,446 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:00:12,538 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:00:14,560 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:00:16,808 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:00:18,824 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:00:18,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:00:18,939 INFO L93 Difference]: Finished difference Result 1448 states and 2247 transitions. [2022-11-23 16:00:18,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:00:18,940 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-23 16:00:18,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:00:18,953 INFO L225 Difference]: With dead ends: 1448 [2022-11-23 16:00:18,953 INFO L226 Difference]: Without dead ends: 1107 [2022-11-23 16:00:18,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:00:18,956 INFO L413 NwaCegarLoop]: 1035 mSDtfsCounter, 437 mSDsluCounter, 620 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 4 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 1655 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.1s IncrementalHoareTripleChecker+Time [2022-11-23 16:00:18,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [438 Valid, 1655 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 236 Invalid, 7 Unknown, 0 Unchecked, 17.1s Time] [2022-11-23 16:00:18,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1107 states. [2022-11-23 16:00:19,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1107 to 806. [2022-11-23 16:00:19,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 587 states have (on average 1.4701873935264054) internal successors, (863), 600 states have internal predecessors, (863), 173 states have call successors, (173), 49 states have call predecessors, (173), 45 states have return successors, (205), 158 states have call predecessors, (205), 161 states have call successors, (205) [2022-11-23 16:00:19,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 1241 transitions. [2022-11-23 16:00:19,019 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 1241 transitions. Word has length 18 [2022-11-23 16:00:19,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:00:19,020 INFO L495 AbstractCegarLoop]: Abstraction has 806 states and 1241 transitions. [2022-11-23 16:00:19,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:00:19,020 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 1241 transitions. [2022-11-23 16:00:19,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-23 16:00:19,022 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:00:19,022 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:00:19,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 16:00:19,022 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:00:19,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:00:19,023 INFO L85 PathProgramCache]: Analyzing trace with hash 741478645, now seen corresponding path program 1 times [2022-11-23 16:00:19,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:00:19,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860988547] [2022-11-23 16:00:19,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:00:19,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:00:19,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:00:19,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:00:19,181 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:00:19,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860988547] [2022-11-23 16:00:19,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860988547] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:00:19,181 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:00:19,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 16:00:19,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513096018] [2022-11-23 16:00:19,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:00:19,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:00:19,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:00:19,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:00:19,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:00:19,183 INFO L87 Difference]: Start difference. First operand 806 states and 1241 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:00:21,329 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:00:23,888 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:00:26,077 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:00:28,047 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:00:30,065 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:00:32,008 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:00:34,027 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 [] [2022-11-23 16:00:34,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:00:34,029 INFO L93 Difference]: Finished difference Result 1304 states and 1978 transitions. [2022-11-23 16:00:34,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:00:34,037 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-23 16:00:34,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:00:34,042 INFO L225 Difference]: With dead ends: 1304 [2022-11-23 16:00:34,042 INFO L226 Difference]: Without dead ends: 831 [2022-11-23 16:00:34,044 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:00:34,045 INFO L413 NwaCegarLoop]: 651 mSDtfsCounter, 704 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 0 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 706 SdHoareTripleChecker+Valid, 689 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.8s IncrementalHoareTripleChecker+Time [2022-11-23 16:00:34,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [706 Valid, 689 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 76 Invalid, 5 Unknown, 0 Unchecked, 14.8s Time] [2022-11-23 16:00:34,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2022-11-23 16:00:34,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 805. [2022-11-23 16:00:34,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 805 states, 586 states have (on average 1.4658703071672354) internal successors, (859), 598 states have internal predecessors, (859), 172 states have call successors, (172), 50 states have call predecessors, (172), 46 states have return successors, (205), 158 states have call predecessors, (205), 161 states have call successors, (205) [2022-11-23 16:00:34,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 805 states to 805 states and 1236 transitions. [2022-11-23 16:00:34,094 INFO L78 Accepts]: Start accepts. Automaton has 805 states and 1236 transitions. Word has length 19 [2022-11-23 16:00:34,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:00:34,095 INFO L495 AbstractCegarLoop]: Abstraction has 805 states and 1236 transitions. [2022-11-23 16:00:34,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:00:34,095 INFO L276 IsEmpty]: Start isEmpty. Operand 805 states and 1236 transitions. [2022-11-23 16:00:34,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-23 16:00:34,096 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:00:34,096 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:00:34,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 16:00:34,097 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:00:34,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:00:34,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1352958913, now seen corresponding path program 1 times [2022-11-23 16:00:34,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:00:34,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99005239] [2022-11-23 16:00:34,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:00:34,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:00:34,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:00:34,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:00:34,227 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:00:34,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99005239] [2022-11-23 16:00:34,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99005239] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:00:34,228 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:00:34,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 16:00:34,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097743868] [2022-11-23 16:00:34,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:00:34,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:00:34,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:00:34,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:00:34,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:00:34,229 INFO L87 Difference]: Start difference. First operand 805 states and 1236 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:00:36,291 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:00:39,492 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:00:41,666 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:00:44,073 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:00:46,082 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:00:48,093 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:00:50,106 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:00:50,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:00:50,108 INFO L93 Difference]: Finished difference Result 1326 states and 2002 transitions. [2022-11-23 16:00:50,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:00:50,116 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-23 16:00:50,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:00:50,122 INFO L225 Difference]: With dead ends: 1326 [2022-11-23 16:00:50,122 INFO L226 Difference]: Without dead ends: 1242 [2022-11-23 16:00:50,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:00:50,124 INFO L413 NwaCegarLoop]: 869 mSDtfsCounter, 688 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 3 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 688 SdHoareTripleChecker+Valid, 1175 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.8s IncrementalHoareTripleChecker+Time [2022-11-23 16:00:50,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [688 Valid, 1175 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 105 Invalid, 6 Unknown, 0 Unchecked, 15.8s Time] [2022-11-23 16:00:50,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1242 states. [2022-11-23 16:00:50,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1242 to 1197. [2022-11-23 16:00:50,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1197 states, 885 states have (on average 1.4757062146892654) internal successors, (1306), 896 states have internal predecessors, (1306), 236 states have call successors, (236), 78 states have call predecessors, (236), 75 states have return successors, (290), 224 states have call predecessors, (290), 225 states have call successors, (290) [2022-11-23 16:00:50,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1197 states to 1197 states and 1832 transitions. [2022-11-23 16:00:50,193 INFO L78 Accepts]: Start accepts. Automaton has 1197 states and 1832 transitions. Word has length 19 [2022-11-23 16:00:50,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:00:50,194 INFO L495 AbstractCegarLoop]: Abstraction has 1197 states and 1832 transitions. [2022-11-23 16:00:50,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:00:50,194 INFO L276 IsEmpty]: Start isEmpty. Operand 1197 states and 1832 transitions. [2022-11-23 16:00:50,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-23 16:00:50,195 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:00:50,195 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:00:50,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 16:00:50,196 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:00:50,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:00:50,196 INFO L85 PathProgramCache]: Analyzing trace with hash -903285917, now seen corresponding path program 1 times [2022-11-23 16:00:50,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:00:50,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467660955] [2022-11-23 16:00:50,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:00:50,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:00:50,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:00:50,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:00:50,291 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:00:50,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467660955] [2022-11-23 16:00:50,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467660955] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:00:50,292 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:00:50,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 16:00:50,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646768936] [2022-11-23 16:00:50,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:00:50,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:00:50,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:00:50,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:00:50,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:00:50,294 INFO L87 Difference]: Start difference. First operand 1197 states and 1832 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:00:51,811 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:00:54,691 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:00:57,593 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:00:59,630 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:01:01,203 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:01:03,372 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:01:05,490 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:01:07,644 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:01:07,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:01:07,646 INFO L93 Difference]: Finished difference Result 1211 states and 1850 transitions. [2022-11-23 16:01:07,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:01:07,653 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-23 16:01:07,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:01:07,659 INFO L225 Difference]: With dead ends: 1211 [2022-11-23 16:01:07,659 INFO L226 Difference]: Without dead ends: 1207 [2022-11-23 16:01:07,660 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:01:07,661 INFO L413 NwaCegarLoop]: 641 mSDtfsCounter, 34 mSDsluCounter, 594 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 3 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 1235 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.3s IncrementalHoareTripleChecker+Time [2022-11-23 16:01:07,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 1235 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 182 Invalid, 5 Unknown, 0 Unchecked, 17.3s Time] [2022-11-23 16:01:07,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1207 states. [2022-11-23 16:01:07,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1207 to 1205. [2022-11-23 16:01:07,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1205 states, 893 states have (on average 1.4759238521836506) internal successors, (1318), 902 states have internal predecessors, (1318), 236 states have call successors, (236), 78 states have call predecessors, (236), 75 states have return successors, (290), 224 states have call predecessors, (290), 225 states have call successors, (290) [2022-11-23 16:01:07,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1205 states to 1205 states and 1844 transitions. [2022-11-23 16:01:07,725 INFO L78 Accepts]: Start accepts. Automaton has 1205 states and 1844 transitions. Word has length 18 [2022-11-23 16:01:07,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:01:07,726 INFO L495 AbstractCegarLoop]: Abstraction has 1205 states and 1844 transitions. [2022-11-23 16:01:07,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:01:07,726 INFO L276 IsEmpty]: Start isEmpty. Operand 1205 states and 1844 transitions. [2022-11-23 16:01:07,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-23 16:01:07,727 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:01:07,727 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:01:07,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 16:01:07,728 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:01:07,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:01:07,730 INFO L85 PathProgramCache]: Analyzing trace with hash -426553731, now seen corresponding path program 1 times [2022-11-23 16:01:07,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:01:07,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286039489] [2022-11-23 16:01:07,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:01:07,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:01:07,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:01:07,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:01:07,948 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:01:07,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286039489] [2022-11-23 16:01:07,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286039489] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:01:07,949 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:01:07,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 16:01:07,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283843953] [2022-11-23 16:01:07,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:01:07,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 16:01:07,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:01:07,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 16:01:07,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 16:01:07,951 INFO L87 Difference]: Start difference. First operand 1205 states and 1844 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:01:10,231 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:01:13,555 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:01:15,964 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:01:18,679 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:01:21,496 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:01:23,507 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:01:23,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:01:23,523 INFO L93 Difference]: Finished difference Result 2182 states and 3341 transitions. [2022-11-23 16:01:23,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 16:01:23,524 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-23 16:01:23,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:01:23,532 INFO L225 Difference]: With dead ends: 2182 [2022-11-23 16:01:23,532 INFO L226 Difference]: Without dead ends: 1497 [2022-11-23 16:01:23,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 16:01:23,536 INFO L413 NwaCegarLoop]: 836 mSDtfsCounter, 1069 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 324 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1073 SdHoareTripleChecker+Valid, 1102 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 324 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.4s IncrementalHoareTripleChecker+Time [2022-11-23 16:01:23,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1073 Valid, 1102 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [324 Valid, 309 Invalid, 6 Unknown, 0 Unchecked, 15.4s Time] [2022-11-23 16:01:23,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1497 states. [2022-11-23 16:01:23,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1497 to 1193. [2022-11-23 16:01:23,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1193 states, 883 states have (on average 1.4722536806342015) internal successors, (1300), 892 states have internal predecessors, (1300), 234 states have call successors, (234), 76 states have call predecessors, (234), 75 states have return successors, (286), 224 states have call predecessors, (286), 223 states have call successors, (286) [2022-11-23 16:01:23,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1193 states to 1193 states and 1820 transitions. [2022-11-23 16:01:23,670 INFO L78 Accepts]: Start accepts. Automaton has 1193 states and 1820 transitions. Word has length 19 [2022-11-23 16:01:23,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:01:23,671 INFO L495 AbstractCegarLoop]: Abstraction has 1193 states and 1820 transitions. [2022-11-23 16:01:23,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:01:23,671 INFO L276 IsEmpty]: Start isEmpty. Operand 1193 states and 1820 transitions. [2022-11-23 16:01:23,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-23 16:01:23,672 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:01:23,673 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] [2022-11-23 16:01:23,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-23 16:01:23,673 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:01:23,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:01:23,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1971571661, now seen corresponding path program 1 times [2022-11-23 16:01:23,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:01:23,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119283836] [2022-11-23 16:01:23,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:01:23,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:01:23,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:01:23,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:01:23,858 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:01:23,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119283836] [2022-11-23 16:01:23,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119283836] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:01:23,858 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:01:23,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 16:01:23,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152955929] [2022-11-23 16:01:23,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:01:23,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:01:23,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:01:23,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:01:23,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:01:23,861 INFO L87 Difference]: Start difference. First operand 1193 states and 1820 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-23 16:01:26,069 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:01:29,316 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:01:31,876 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:01:34,153 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:01:36,171 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:01:38,393 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:01:40,907 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 [] [2022-11-23 16:01:40,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:01:40,909 INFO L93 Difference]: Finished difference Result 2387 states and 3643 transitions. [2022-11-23 16:01:40,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:01:40,921 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-11-23 16:01:40,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:01:40,927 INFO L225 Difference]: With dead ends: 2387 [2022-11-23 16:01:40,927 INFO L226 Difference]: Without dead ends: 1196 [2022-11-23 16:01:40,931 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:01:40,931 INFO L413 NwaCegarLoop]: 644 mSDtfsCounter, 0 mSDsluCounter, 644 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 4 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1288 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.0s IncrementalHoareTripleChecker+Time [2022-11-23 16:01:40,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1288 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 136 Invalid, 7 Unknown, 0 Unchecked, 17.0s Time] [2022-11-23 16:01:40,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2022-11-23 16:01:41,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 1196. [2022-11-23 16:01:41,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1196 states, 886 states have (on average 1.4706546275395034) internal successors, (1303), 895 states have internal predecessors, (1303), 234 states have call successors, (234), 76 states have call predecessors, (234), 75 states have return successors, (286), 224 states have call predecessors, (286), 223 states have call successors, (286) [2022-11-23 16:01:41,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1196 states to 1196 states and 1823 transitions. [2022-11-23 16:01:41,031 INFO L78 Accepts]: Start accepts. Automaton has 1196 states and 1823 transitions. Word has length 21 [2022-11-23 16:01:41,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:01:41,031 INFO L495 AbstractCegarLoop]: Abstraction has 1196 states and 1823 transitions. [2022-11-23 16:01:41,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-23 16:01:41,032 INFO L276 IsEmpty]: Start isEmpty. Operand 1196 states and 1823 transitions. [2022-11-23 16:01:41,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-23 16:01:41,033 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:01:41,033 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] [2022-11-23 16:01:41,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-23 16:01:41,033 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:01:41,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:01:41,034 INFO L85 PathProgramCache]: Analyzing trace with hash 400931274, now seen corresponding path program 1 times [2022-11-23 16:01:41,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:01:41,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148075713] [2022-11-23 16:01:41,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:01:41,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:01:41,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:01:41,279 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 16:01:41,279 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:01:41,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148075713] [2022-11-23 16:01:41,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148075713] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:01:41,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812397691] [2022-11-23 16:01:41,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:01:41,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:01:41,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbca4e56-a55d-43e4-95ff-f0e4470ba6e3/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:01:41,287 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbca4e56-a55d-43e4-95ff-f0e4470ba6e3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:01:41,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbca4e56-a55d-43e4-95ff-f0e4470ba6e3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 16:01:41,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:01:41,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 676 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-23 16:01:41,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:01:41,959 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 16:01:41,960 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 16:01:41,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812397691] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:01:41,960 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 16:01:41,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-11-23 16:01:41,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819003137] [2022-11-23 16:01:41,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:01:41,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:01:41,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:01:41,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:01:41,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 16:01:41,962 INFO L87 Difference]: Start difference. First operand 1196 states and 1823 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-23 16:01:44,787 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 [] [2022-11-23 16:01:47,426 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:01:49,496 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:01:51,849 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:01:53,861 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:01:55,872 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:01:57,892 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:01:57,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:01:57,893 INFO L93 Difference]: Finished difference Result 1716 states and 2569 transitions. [2022-11-23 16:01:57,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:01:57,898 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-11-23 16:01:57,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:01:57,906 INFO L225 Difference]: With dead ends: 1716 [2022-11-23 16:01:57,906 INFO L226 Difference]: Without dead ends: 1639 [2022-11-23 16:01:57,907 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 16:01:57,908 INFO L413 NwaCegarLoop]: 654 mSDtfsCounter, 650 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 6 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 650 SdHoareTripleChecker+Valid, 970 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.8s IncrementalHoareTripleChecker+Time [2022-11-23 16:01:57,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [650 Valid, 970 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 99 Invalid, 6 Unknown, 0 Unchecked, 15.8s Time] [2022-11-23 16:01:57,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1639 states. [2022-11-23 16:01:58,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1639 to 984. [2022-11-23 16:01:58,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 984 states, 721 states have (on average 1.4244105409153953) internal successors, (1027), 727 states have internal predecessors, (1027), 185 states have call successors, (185), 73 states have call predecessors, (185), 77 states have return successors, (245), 183 states have call predecessors, (245), 178 states have call successors, (245) [2022-11-23 16:01:58,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 984 states to 984 states and 1457 transitions. [2022-11-23 16:01:58,018 INFO L78 Accepts]: Start accepts. Automaton has 984 states and 1457 transitions. Word has length 24 [2022-11-23 16:01:58,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:01:58,019 INFO L495 AbstractCegarLoop]: Abstraction has 984 states and 1457 transitions. [2022-11-23 16:01:58,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-23 16:01:58,019 INFO L276 IsEmpty]: Start isEmpty. Operand 984 states and 1457 transitions. [2022-11-23 16:01:58,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-23 16:01:58,022 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:01:58,022 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] [2022-11-23 16:01:58,036 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbca4e56-a55d-43e4-95ff-f0e4470ba6e3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 16:01:58,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbca4e56-a55d-43e4-95ff-f0e4470ba6e3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:01:58,231 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:01:58,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:01:58,231 INFO L85 PathProgramCache]: Analyzing trace with hash -942460430, now seen corresponding path program 1 times [2022-11-23 16:01:58,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:01:58,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699315532] [2022-11-23 16:01:58,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:01:58,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:01:58,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:01:58,435 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 16:01:58,435 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:01:58,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699315532] [2022-11-23 16:01:58,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699315532] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:01:58,436 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:01:58,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 16:01:58,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866736867] [2022-11-23 16:01:58,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:01:58,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 16:01:58,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:01:58,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 16:01:58,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 16:01:58,437 INFO L87 Difference]: Start difference. First operand 984 states and 1457 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:02:00,807 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:02:02,815 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:02:05,824 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:02:07,936 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:02:09,626 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:02:11,770 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:02:14,724 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:02:16,735 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:02:16,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:02:16,735 INFO L93 Difference]: Finished difference Result 1083 states and 1585 transitions. [2022-11-23 16:02:16,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 16:02:16,741 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-11-23 16:02:16,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:02:16,746 INFO L225 Difference]: With dead ends: 1083 [2022-11-23 16:02:16,746 INFO L226 Difference]: Without dead ends: 1044 [2022-11-23 16:02:16,747 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 [2022-11-23 16:02:16,747 INFO L413 NwaCegarLoop]: 621 mSDtfsCounter, 737 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 18 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 737 SdHoareTripleChecker+Valid, 1060 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.2s IncrementalHoareTripleChecker+Time [2022-11-23 16:02:16,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [737 Valid, 1060 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 412 Invalid, 6 Unknown, 0 Unchecked, 18.2s Time] [2022-11-23 16:02:16,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1044 states. [2022-11-23 16:02:16,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1044 to 984. [2022-11-23 16:02:16,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 984 states, 721 states have (on average 1.4216366158113731) internal successors, (1025), 727 states have internal predecessors, (1025), 185 states have call successors, (185), 73 states have call predecessors, (185), 77 states have return successors, (245), 183 states have call predecessors, (245), 178 states have call successors, (245) [2022-11-23 16:02:16,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 984 states to 984 states and 1455 transitions. [2022-11-23 16:02:16,823 INFO L78 Accepts]: Start accepts. Automaton has 984 states and 1455 transitions. Word has length 28 [2022-11-23 16:02:16,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:02:16,824 INFO L495 AbstractCegarLoop]: Abstraction has 984 states and 1455 transitions. [2022-11-23 16:02:16,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:02:16,824 INFO L276 IsEmpty]: Start isEmpty. Operand 984 states and 1455 transitions. [2022-11-23 16:02:16,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-23 16:02:16,826 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:02:16,826 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:02:16,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-23 16:02:16,827 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:02:16,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:02:16,827 INFO L85 PathProgramCache]: Analyzing trace with hash 372923120, now seen corresponding path program 1 times [2022-11-23 16:02:16,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:02:16,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932445477] [2022-11-23 16:02:16,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:02:16,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:02:16,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:02:16,992 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 16:02:16,992 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:02:16,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932445477] [2022-11-23 16:02:16,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932445477] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:02:16,993 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:02:16,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 16:02:16,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072434190] [2022-11-23 16:02:16,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:02:16,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 16:02:16,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:02:16,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 16:02:16,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 16:02:16,994 INFO L87 Difference]: Start difference. First operand 984 states and 1455 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:02:19,014 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:02:21,023 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:02:23,766 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:02:25,940 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:02:28,481 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:02:30,679 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:02:32,692 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:02:34,122 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:02:36,134 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:02:38,014 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:02:38,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:02:38,015 INFO L93 Difference]: Finished difference Result 1060 states and 1551 transitions. [2022-11-23 16:02:38,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 16:02:38,027 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-11-23 16:02:38,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:02:38,031 INFO L225 Difference]: With dead ends: 1060 [2022-11-23 16:02:38,031 INFO L226 Difference]: Without dead ends: 1021 [2022-11-23 16:02:38,032 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 [2022-11-23 16:02:38,033 INFO L413 NwaCegarLoop]: 618 mSDtfsCounter, 697 mSDsluCounter, 438 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 8 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 697 SdHoareTripleChecker+Valid, 1056 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.9s IncrementalHoareTripleChecker+Time [2022-11-23 16:02:38,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [697 Valid, 1056 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 379 Invalid, 6 Unknown, 0 Unchecked, 20.9s Time] [2022-11-23 16:02:38,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1021 states. [2022-11-23 16:02:38,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1021 to 993. [2022-11-23 16:02:38,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 993 states, 728 states have (on average 1.4175824175824177) internal successors, (1032), 735 states have internal predecessors, (1032), 186 states have call successors, (186), 74 states have call predecessors, (186), 78 states have return successors, (246), 183 states have call predecessors, (246), 179 states have call successors, (246) [2022-11-23 16:02:38,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 993 states to 993 states and 1464 transitions. [2022-11-23 16:02:38,128 INFO L78 Accepts]: Start accepts. Automaton has 993 states and 1464 transitions. Word has length 29 [2022-11-23 16:02:38,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:02:38,128 INFO L495 AbstractCegarLoop]: Abstraction has 993 states and 1464 transitions. [2022-11-23 16:02:38,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:02:38,129 INFO L276 IsEmpty]: Start isEmpty. Operand 993 states and 1464 transitions. [2022-11-23 16:02:38,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-23 16:02:38,131 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:02:38,131 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] [2022-11-23 16:02:38,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-23 16:02:38,132 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:02:38,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:02:38,132 INFO L85 PathProgramCache]: Analyzing trace with hash -2054923603, now seen corresponding path program 1 times [2022-11-23 16:02:38,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:02:38,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723871857] [2022-11-23 16:02:38,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:02:38,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:02:38,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:02:38,314 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 16:02:38,314 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:02:38,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723871857] [2022-11-23 16:02:38,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723871857] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:02:38,314 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:02:38,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 16:02:38,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293733153] [2022-11-23 16:02:38,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:02:38,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 16:02:38,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:02:38,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 16:02:38,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 16:02:38,317 INFO L87 Difference]: Start difference. First operand 993 states and 1464 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:02:41,312 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:02:42,840 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:02:45,960 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:02:48,067 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:02:50,693 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:02:52,256 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:02:54,393 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:02:56,410 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:02:56,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:02:56,418 INFO L93 Difference]: Finished difference Result 1344 states and 1973 transitions. [2022-11-23 16:02:56,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 16:02:56,419 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-11-23 16:02:56,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:02:56,425 INFO L225 Difference]: With dead ends: 1344 [2022-11-23 16:02:56,425 INFO L226 Difference]: Without dead ends: 1335 [2022-11-23 16:02:56,426 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 [2022-11-23 16:02:56,427 INFO L413 NwaCegarLoop]: 853 mSDtfsCounter, 917 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 111 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 926 SdHoareTripleChecker+Valid, 1277 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.0s IncrementalHoareTripleChecker+Time [2022-11-23 16:02:56,427 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [926 Valid, 1277 Invalid, 529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 413 Invalid, 5 Unknown, 0 Unchecked, 18.0s Time] [2022-11-23 16:02:56,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1335 states. [2022-11-23 16:02:56,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1335 to 1029. [2022-11-23 16:02:56,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1029 states, 762 states have (on average 1.4094488188976377) internal successors, (1074), 768 states have internal predecessors, (1074), 186 states have call successors, (186), 74 states have call predecessors, (186), 80 states have return successors, (249), 186 states have call predecessors, (249), 179 states have call successors, (249) [2022-11-23 16:02:56,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1029 states to 1029 states and 1509 transitions. [2022-11-23 16:02:56,524 INFO L78 Accepts]: Start accepts. Automaton has 1029 states and 1509 transitions. Word has length 30 [2022-11-23 16:02:56,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:02:56,524 INFO L495 AbstractCegarLoop]: Abstraction has 1029 states and 1509 transitions. [2022-11-23 16:02:56,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:02:56,525 INFO L276 IsEmpty]: Start isEmpty. Operand 1029 states and 1509 transitions. [2022-11-23 16:02:56,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-23 16:02:56,526 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:02:56,526 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] [2022-11-23 16:02:56,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-23 16:02:56,527 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:02:56,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:02:56,527 INFO L85 PathProgramCache]: Analyzing trace with hash -2055200433, now seen corresponding path program 1 times [2022-11-23 16:02:56,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:02:56,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444979076] [2022-11-23 16:02:56,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:02:56,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:02:56,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:02:56,661 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 16:02:56,662 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:02:56,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444979076] [2022-11-23 16:02:56,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444979076] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:02:56,662 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:02:56,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 16:02:56,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134660569] [2022-11-23 16:02:56,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:02:56,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:02:56,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:02:56,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:02:56,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:02:56,666 INFO L87 Difference]: Start difference. First operand 1029 states and 1509 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:02:59,193 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:03:01,891 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:03:03,932 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:03:06,546 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:03:08,105 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:03:10,121 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:03:10,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:03:10,122 INFO L93 Difference]: Finished difference Result 1481 states and 2181 transitions. [2022-11-23 16:03:10,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:03:10,127 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-11-23 16:03:10,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:03:10,133 INFO L225 Difference]: With dead ends: 1481 [2022-11-23 16:03:10,134 INFO L226 Difference]: Without dead ends: 1449 [2022-11-23 16:03:10,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:03:10,135 INFO L413 NwaCegarLoop]: 655 mSDtfsCounter, 679 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 7 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 679 SdHoareTripleChecker+Valid, 940 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.3s IncrementalHoareTripleChecker+Time [2022-11-23 16:03:10,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [679 Valid, 940 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 96 Invalid, 5 Unknown, 0 Unchecked, 13.3s Time] [2022-11-23 16:03:10,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1449 states. [2022-11-23 16:03:10,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1449 to 1442. [2022-11-23 16:03:10,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1442 states, 1080 states have (on average 1.4268518518518518) internal successors, (1541), 1082 states have internal predecessors, (1541), 252 states have call successors, (252), 101 states have call predecessors, (252), 109 states have return successors, (333), 258 states have call predecessors, (333), 245 states have call successors, (333) [2022-11-23 16:03:10,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 2126 transitions. [2022-11-23 16:03:10,294 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 2126 transitions. Word has length 30 [2022-11-23 16:03:10,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:03:10,294 INFO L495 AbstractCegarLoop]: Abstraction has 1442 states and 2126 transitions. [2022-11-23 16:03:10,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:03:10,295 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 2126 transitions. [2022-11-23 16:03:10,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-23 16:03:10,296 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:03:10,296 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] [2022-11-23 16:03:10,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-23 16:03:10,297 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:03:10,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:03:10,297 INFO L85 PathProgramCache]: Analyzing trace with hash -2069545342, now seen corresponding path program 1 times [2022-11-23 16:03:10,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:03:10,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426722071] [2022-11-23 16:03:10,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:03:10,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:03:10,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:03:10,427 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 16:03:10,428 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:03:10,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426722071] [2022-11-23 16:03:10,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426722071] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:03:10,428 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:03:10,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 16:03:10,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98964253] [2022-11-23 16:03:10,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:03:10,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:03:10,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:03:10,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:03:10,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:03:10,431 INFO L87 Difference]: Start difference. First operand 1442 states and 2126 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:03:12,928 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:03:14,941 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:03:17,511 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:03:19,846 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:03:23,945 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:03:25,956 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:03:27,970 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 [] [2022-11-23 16:03:27,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:03:27,979 INFO L93 Difference]: Finished difference Result 1868 states and 2770 transitions. [2022-11-23 16:03:27,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:03:27,980 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-11-23 16:03:27,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:03:27,987 INFO L225 Difference]: With dead ends: 1868 [2022-11-23 16:03:27,987 INFO L226 Difference]: Without dead ends: 1855 [2022-11-23 16:03:27,989 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:03:27,989 INFO L413 NwaCegarLoop]: 868 mSDtfsCounter, 297 mSDsluCounter, 577 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 3 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 1445 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.4s IncrementalHoareTripleChecker+Time [2022-11-23 16:03:27,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [297 Valid, 1445 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 194 Invalid, 6 Unknown, 0 Unchecked, 17.4s Time] [2022-11-23 16:03:27,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1855 states. [2022-11-23 16:03:28,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1855 to 1439. [2022-11-23 16:03:28,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1439 states, 1077 states have (on average 1.4243268337975858) internal successors, (1534), 1079 states have internal predecessors, (1534), 252 states have call successors, (252), 101 states have call predecessors, (252), 109 states have return successors, (333), 258 states have call predecessors, (333), 245 states have call successors, (333) [2022-11-23 16:03:28,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1439 states to 1439 states and 2119 transitions. [2022-11-23 16:03:28,163 INFO L78 Accepts]: Start accepts. Automaton has 1439 states and 2119 transitions. Word has length 30 [2022-11-23 16:03:28,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:03:28,164 INFO L495 AbstractCegarLoop]: Abstraction has 1439 states and 2119 transitions. [2022-11-23 16:03:28,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:03:28,164 INFO L276 IsEmpty]: Start isEmpty. Operand 1439 states and 2119 transitions. [2022-11-23 16:03:28,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-23 16:03:28,166 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:03:28,167 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:03:28,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-23 16:03:28,167 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:03:28,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:03:28,168 INFO L85 PathProgramCache]: Analyzing trace with hash 721772729, now seen corresponding path program 1 times [2022-11-23 16:03:28,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:03:28,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115784676] [2022-11-23 16:03:28,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:03:28,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:03:28,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:03:28,392 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 16:03:28,392 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:03:28,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115784676] [2022-11-23 16:03:28,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115784676] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:03:28,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228229608] [2022-11-23 16:03:28,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:03:28,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:03:28,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbca4e56-a55d-43e4-95ff-f0e4470ba6e3/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:03:28,399 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbca4e56-a55d-43e4-95ff-f0e4470ba6e3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:03:28,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbca4e56-a55d-43e4-95ff-f0e4470ba6e3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 16:03:28,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:03:28,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 569 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-23 16:03:28,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:03:28,982 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 16:03:28,982 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 16:03:28,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228229608] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:03:28,983 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 16:03:28,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3] total 6 [2022-11-23 16:03:28,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715496508] [2022-11-23 16:03:28,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:03:28,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 16:03:28,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:03:28,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 16:03:28,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 16:03:28,984 INFO L87 Difference]: Start difference. First operand 1439 states and 2119 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:03:32,552 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 [] [2022-11-23 16:03:35,061 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:03:37,442 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:03:39,871 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:03:41,361 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:03:43,473 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:03:45,493 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:03:47,504 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 [] [2022-11-23 16:03:47,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:03:47,505 INFO L93 Difference]: Finished difference Result 1451 states and 2130 transitions. [2022-11-23 16:03:47,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 16:03:47,514 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-11-23 16:03:47,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:03:47,520 INFO L225 Difference]: With dead ends: 1451 [2022-11-23 16:03:47,521 INFO L226 Difference]: Without dead ends: 1430 [2022-11-23 16:03:47,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-23 16:03:47,522 INFO L413 NwaCegarLoop]: 625 mSDtfsCounter, 9 mSDsluCounter, 1239 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 0 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 1864 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.4s IncrementalHoareTripleChecker+Time [2022-11-23 16:03:47,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 1864 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 218 Invalid, 6 Unknown, 0 Unchecked, 18.4s Time] [2022-11-23 16:03:47,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1430 states. [2022-11-23 16:03:47,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1430 to 1430. [2022-11-23 16:03:47,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1430 states, 1068 states have (on average 1.4269662921348314) internal successors, (1524), 1070 states have internal predecessors, (1524), 252 states have call successors, (252), 101 states have call predecessors, (252), 109 states have return successors, (333), 258 states have call predecessors, (333), 245 states have call successors, (333) [2022-11-23 16:03:47,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1430 states to 1430 states and 2109 transitions. [2022-11-23 16:03:47,661 INFO L78 Accepts]: Start accepts. Automaton has 1430 states and 2109 transitions. Word has length 31 [2022-11-23 16:03:47,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:03:47,661 INFO L495 AbstractCegarLoop]: Abstraction has 1430 states and 2109 transitions. [2022-11-23 16:03:47,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:03:47,662 INFO L276 IsEmpty]: Start isEmpty. Operand 1430 states and 2109 transitions. [2022-11-23 16:03:47,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-23 16:03:47,664 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:03:47,664 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:03:47,684 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbca4e56-a55d-43e4-95ff-f0e4470ba6e3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 16:03:47,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbca4e56-a55d-43e4-95ff-f0e4470ba6e3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-23 16:03:47,873 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:03:47,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:03:47,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1823883511, now seen corresponding path program 1 times [2022-11-23 16:03:47,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:03:47,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633354810] [2022-11-23 16:03:47,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:03:47,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:03:47,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:03:48,035 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 16:03:48,035 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:03:48,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633354810] [2022-11-23 16:03:48,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633354810] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:03:48,035 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:03:48,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 16:03:48,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161321657] [2022-11-23 16:03:48,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:03:48,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:03:48,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:03:48,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:03:48,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:03:48,037 INFO L87 Difference]: Start difference. First operand 1430 states and 2109 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 16:03:51,627 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 [] [2022-11-23 16:03:54,010 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:03:56,033 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:03:57,940 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:04:00,127 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:04:02,343 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:04:04,360 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:04:04,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:04:04,361 INFO L93 Difference]: Finished difference Result 1906 states and 2803 transitions. [2022-11-23 16:04:04,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:04:04,368 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 39 [2022-11-23 16:04:04,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:04:04,373 INFO L225 Difference]: With dead ends: 1906 [2022-11-23 16:04:04,374 INFO L226 Difference]: Without dead ends: 1063 [2022-11-23 16:04:04,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:04:04,377 INFO L413 NwaCegarLoop]: 662 mSDtfsCounter, 302 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 1 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 1046 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.2s IncrementalHoareTripleChecker+Time [2022-11-23 16:04:04,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [302 Valid, 1046 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 135 Invalid, 6 Unknown, 0 Unchecked, 16.2s Time] [2022-11-23 16:04:04,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1063 states. [2022-11-23 16:04:04,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1063 to 1043. [2022-11-23 16:04:04,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1043 states, 776 states have (on average 1.3981958762886597) internal successors, (1085), 781 states have internal predecessors, (1085), 186 states have call successors, (186), 74 states have call predecessors, (186), 80 states have return successors, (245), 187 states have call predecessors, (245), 179 states have call successors, (245) [2022-11-23 16:04:04,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1043 states to 1043 states and 1516 transitions. [2022-11-23 16:04:04,494 INFO L78 Accepts]: Start accepts. Automaton has 1043 states and 1516 transitions. Word has length 39 [2022-11-23 16:04:04,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:04:04,496 INFO L495 AbstractCegarLoop]: Abstraction has 1043 states and 1516 transitions. [2022-11-23 16:04:04,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 16:04:04,496 INFO L276 IsEmpty]: Start isEmpty. Operand 1043 states and 1516 transitions. [2022-11-23 16:04:04,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-23 16:04:04,499 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:04:04,499 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:04:04,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-23 16:04:04,500 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:04:04,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:04:04,500 INFO L85 PathProgramCache]: Analyzing trace with hash -365549687, now seen corresponding path program 1 times [2022-11-23 16:04:04,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:04:04,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798597198] [2022-11-23 16:04:04,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:04:04,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:04:04,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:04:04,708 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 16:04:04,708 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:04:04,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798597198] [2022-11-23 16:04:04,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798597198] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:04:04,708 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:04:04,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 16:04:04,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85105128] [2022-11-23 16:04:04,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:04:04,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 16:04:04,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:04:04,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 16:04:04,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 16:04:04,711 INFO L87 Difference]: Start difference. First operand 1043 states and 1516 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 16:04:08,543 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:04:11,053 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:04:13,149 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:04:14,700 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:04:16,874 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:04:18,895 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:04:20,914 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 [] [2022-11-23 16:04:20,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:04:20,927 INFO L93 Difference]: Finished difference Result 1344 states and 1971 transitions. [2022-11-23 16:04:20,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 16:04:20,927 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 40 [2022-11-23 16:04:20,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:04:20,933 INFO L225 Difference]: With dead ends: 1344 [2022-11-23 16:04:20,933 INFO L226 Difference]: Without dead ends: 926 [2022-11-23 16:04:20,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 16:04:20,935 INFO L413 NwaCegarLoop]: 662 mSDtfsCounter, 729 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 5 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 730 SdHoareTripleChecker+Valid, 1141 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.1s IncrementalHoareTripleChecker+Time [2022-11-23 16:04:20,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [730 Valid, 1141 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 362 Invalid, 6 Unknown, 0 Unchecked, 16.1s Time] [2022-11-23 16:04:20,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2022-11-23 16:04:21,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 885. [2022-11-23 16:04:21,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 885 states, 664 states have (on average 1.4066265060240963) internal successors, (934), 670 states have internal predecessors, (934), 163 states have call successors, (163), 56 states have call predecessors, (163), 57 states have return successors, (201), 158 states have call predecessors, (201), 156 states have call successors, (201) [2022-11-23 16:04:21,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 885 states to 885 states and 1298 transitions. [2022-11-23 16:04:21,055 INFO L78 Accepts]: Start accepts. Automaton has 885 states and 1298 transitions. Word has length 40 [2022-11-23 16:04:21,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:04:21,056 INFO L495 AbstractCegarLoop]: Abstraction has 885 states and 1298 transitions. [2022-11-23 16:04:21,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 16:04:21,057 INFO L276 IsEmpty]: Start isEmpty. Operand 885 states and 1298 transitions. [2022-11-23 16:04:21,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-23 16:04:21,059 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:04:21,064 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:04:21,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-23 16:04:21,064 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:04:21,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:04:21,065 INFO L85 PathProgramCache]: Analyzing trace with hash 930520316, now seen corresponding path program 1 times [2022-11-23 16:04:21,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:04:21,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516568560] [2022-11-23 16:04:21,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:04:21,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:04:21,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:04:21,225 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 16:04:21,225 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:04:21,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516568560] [2022-11-23 16:04:21,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516568560] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:04:21,226 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:04:21,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 16:04:21,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927330288] [2022-11-23 16:04:21,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:04:21,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:04:21,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:04:21,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:04:21,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:04:21,228 INFO L87 Difference]: Start difference. First operand 885 states and 1298 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-23 16:04:24,806 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 [] [2022-11-23 16:04:26,848 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:04:29,169 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:04:32,227 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:04:34,239 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:04:36,254 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:04:38,266 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:04:38,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:04:38,268 INFO L93 Difference]: Finished difference Result 907 states and 1325 transitions. [2022-11-23 16:04:38,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:04:38,274 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 38 [2022-11-23 16:04:38,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:04:38,278 INFO L225 Difference]: With dead ends: 907 [2022-11-23 16:04:38,279 INFO L226 Difference]: Without dead ends: 900 [2022-11-23 16:04:38,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:04:38,280 INFO L413 NwaCegarLoop]: 618 mSDtfsCounter, 32 mSDsluCounter, 576 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 4 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 1194 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.0s IncrementalHoareTripleChecker+Time [2022-11-23 16:04:38,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 1194 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 159 Invalid, 7 Unknown, 0 Unchecked, 17.0s Time] [2022-11-23 16:04:38,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 900 states. [2022-11-23 16:04:38,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 900 to 896. [2022-11-23 16:04:38,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 675 states have (on average 1.4044444444444444) internal successors, (948), 681 states have internal predecessors, (948), 163 states have call successors, (163), 56 states have call predecessors, (163), 57 states have return successors, (201), 158 states have call predecessors, (201), 156 states have call successors, (201) [2022-11-23 16:04:38,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 1312 transitions. [2022-11-23 16:04:38,377 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 1312 transitions. Word has length 38 [2022-11-23 16:04:38,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:04:38,377 INFO L495 AbstractCegarLoop]: Abstraction has 896 states and 1312 transitions. [2022-11-23 16:04:38,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-23 16:04:38,377 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 1312 transitions. [2022-11-23 16:04:38,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-23 16:04:38,379 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:04:38,380 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:04:38,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-23 16:04:38,380 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:04:38,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:04:38,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1209870560, now seen corresponding path program 1 times [2022-11-23 16:04:38,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:04:38,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196327453] [2022-11-23 16:04:38,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:04:38,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:04:38,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:04:38,565 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 16:04:38,566 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:04:38,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196327453] [2022-11-23 16:04:38,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196327453] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:04:38,566 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:04:38,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 16:04:38,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688004845] [2022-11-23 16:04:38,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:04:38,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 16:04:38,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:04:38,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 16:04:38,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 16:04:38,569 INFO L87 Difference]: Start difference. First operand 896 states and 1312 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-23 16:04:43,040 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:04:45,303 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:04:47,784 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:04:50,598 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:04:52,608 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:04:54,620 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:04:56,635 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 [] [2022-11-23 16:04:56,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:04:56,653 INFO L93 Difference]: Finished difference Result 922 states and 1336 transitions. [2022-11-23 16:04:56,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 16:04:56,653 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 39 [2022-11-23 16:04:56,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:04:56,657 INFO L225 Difference]: With dead ends: 922 [2022-11-23 16:04:56,658 INFO L226 Difference]: Without dead ends: 917 [2022-11-23 16:04:56,658 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-23 16:04:56,659 INFO L413 NwaCegarLoop]: 617 mSDtfsCounter, 746 mSDsluCounter, 815 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 27 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 753 SdHoareTripleChecker+Valid, 1432 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.9s IncrementalHoareTripleChecker+Time [2022-11-23 16:04:56,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [753 Valid, 1432 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 661 Invalid, 7 Unknown, 0 Unchecked, 17.9s Time] [2022-11-23 16:04:56,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 917 states. [2022-11-23 16:04:56,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 917 to 897. [2022-11-23 16:04:56,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 676 states have (on average 1.4038461538461537) internal successors, (949), 682 states have internal predecessors, (949), 163 states have call successors, (163), 56 states have call predecessors, (163), 57 states have return successors, (201), 158 states have call predecessors, (201), 156 states have call successors, (201) [2022-11-23 16:04:56,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 1313 transitions. [2022-11-23 16:04:56,776 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 1313 transitions. Word has length 39 [2022-11-23 16:04:56,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:04:56,777 INFO L495 AbstractCegarLoop]: Abstraction has 897 states and 1313 transitions. [2022-11-23 16:04:56,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-23 16:04:56,777 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 1313 transitions. [2022-11-23 16:04:56,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-23 16:04:56,779 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:04:56,779 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:04:56,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-23 16:04:56,780 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:04:56,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:04:56,780 INFO L85 PathProgramCache]: Analyzing trace with hash 2093468749, now seen corresponding path program 1 times [2022-11-23 16:04:56,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:04:56,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877567562] [2022-11-23 16:04:56,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:04:56,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:05:00,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:05:11,834 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 16:05:11,835 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:05:11,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877567562] [2022-11-23 16:05:11,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877567562] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:05:11,835 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:05:11,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 16:05:11,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912674152] [2022-11-23 16:05:11,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:05:11,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 16:05:11,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:05:11,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 16:05:11,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 16:05:11,838 INFO L87 Difference]: Start difference. First operand 897 states and 1313 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 3 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-23 16:05:16,285 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 [] [2022-11-23 16:05:18,721 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:05:20,815 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:05:22,854 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:05:24,988 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:05:26,855 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:05:29,244 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:05:29,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:05:29,265 INFO L93 Difference]: Finished difference Result 910 states and 1325 transitions. [2022-11-23 16:05:29,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 16:05:29,266 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 3 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 42 [2022-11-23 16:05:29,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:05:29,268 INFO L225 Difference]: With dead ends: 910 [2022-11-23 16:05:29,268 INFO L226 Difference]: Without dead ends: 907 [2022-11-23 16:05:29,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 16:05:29,269 INFO L413 NwaCegarLoop]: 731 mSDtfsCounter, 583 mSDsluCounter, 766 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 157 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 624 SdHoareTripleChecker+Valid, 1497 SdHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.2s IncrementalHoareTripleChecker+Time [2022-11-23 16:05:29,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [624 Valid, 1497 Invalid, 618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 456 Invalid, 5 Unknown, 0 Unchecked, 17.2s Time] [2022-11-23 16:05:29,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 907 states. [2022-11-23 16:05:29,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 907 to 886. [2022-11-23 16:05:29,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 886 states, 668 states have (on average 1.401197604790419) internal successors, (936), 675 states have internal predecessors, (936), 161 states have call successors, (161), 55 states have call predecessors, (161), 56 states have return successors, (196), 155 states have call predecessors, (196), 154 states have call successors, (196) [2022-11-23 16:05:29,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 1293 transitions. [2022-11-23 16:05:29,358 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 1293 transitions. Word has length 42 [2022-11-23 16:05:29,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:05:29,359 INFO L495 AbstractCegarLoop]: Abstraction has 886 states and 1293 transitions. [2022-11-23 16:05:29,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 3 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-23 16:05:29,359 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 1293 transitions. [2022-11-23 16:05:29,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-23 16:05:29,361 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:05:29,361 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:05:29,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-23 16:05:29,362 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:05:29,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:05:29,362 INFO L85 PathProgramCache]: Analyzing trace with hash 873219454, now seen corresponding path program 1 times [2022-11-23 16:05:29,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:05:29,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403540182] [2022-11-23 16:05:29,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:05:29,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:05:29,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:05:29,566 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 16:05:29,566 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:05:29,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403540182] [2022-11-23 16:05:29,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403540182] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:05:29,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126574490] [2022-11-23 16:05:29,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:05:29,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:05:29,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbca4e56-a55d-43e4-95ff-f0e4470ba6e3/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:05:29,571 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbca4e56-a55d-43e4-95ff-f0e4470ba6e3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:05:29,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbca4e56-a55d-43e4-95ff-f0e4470ba6e3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 16:05:30,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:05:30,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 650 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-23 16:05:30,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:05:30,790 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:05:30,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:05:30,835 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 16:05:30,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126574490] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:05:30,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1345552789] [2022-11-23 16:05:30,856 INFO L159 IcfgInterpreter]: Started Sifa with 38 locations of interest [2022-11-23 16:05:30,856 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 16:05:30,860 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 16:05:30,865 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 16:05:30,866 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 16:05:31,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:05:31,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:05:31,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2022-11-23 16:05:31,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:05:31,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:05:31,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:05:31,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:05:31,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:05:31,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:05:31,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:05:31,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:05:31,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:05:31,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:05:31,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:05:31,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:05:31,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:05:31,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:05:31,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:05:31,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:05:31,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:05:31,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 43 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 0 case distinctions, treesize of input 131 treesize of output 140 [2022-11-23 16:05:31,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:05:31,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:05:31,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:05:31,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:05:31,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:05:31,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:05:31,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:05:31,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:05:31,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 33 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 131 [2022-11-23 16:05:31,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:05:31,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:05:31,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:05:31,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:05:31,510 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2022-11-23 16:05:31,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:05:31,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:05:31,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:05:31,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:05:31,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:05:31,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:05:31,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:05:31,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:05:31,908 INFO L217 Elim1Store]: Index analysis took 333 ms [2022-11-23 16:05:39,176 WARN L233 SmtUtils]: Spent 7.24s on a formula simplification. DAG size of input: 814 DAG size of output: 341 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-23 16:05:39,179 INFO L321 Elim1Store]: treesize reduction 4744, result has 21.3 percent of original size [2022-11-23 16:05:39,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 31 select indices, 31 select index equivalence classes, 488 disjoint index pairs (out of 465 index pairs), introduced 31 new quantified variables, introduced 34 case distinctions, treesize of input 192 treesize of output 1391 [2022-11-23 16:05:39,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:05:39,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:05:39,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:05:39,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:05:39,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:05:39,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:05:39,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:05:39,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:05:39,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:05:40,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:05:40,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:05:40,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:05:40,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:05:40,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:05:40,389 INFO L217 Elim1Store]: Index analysis took 843 ms [2022-11-23 16:05:53,616 WARN L233 SmtUtils]: Spent 13.21s on a formula simplification. DAG size of input: 1002 DAG size of output: 453 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-23 16:05:53,619 INFO L321 Elim1Store]: treesize reduction 6523, result has 17.2 percent of original size [2022-11-23 16:05:53,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 37 select indices, 37 select index equivalence classes, 509 disjoint index pairs (out of 666 index pairs), introduced 37 new quantified variables, introduced 194 case distinctions, treesize of input 292 treesize of output 1537 [2022-11-23 16:05:55,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:05:55,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:05:55,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:05:55,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 67 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 1221 treesize of output 533 [2022-11-23 16:05:55,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 58 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 150 [2022-11-23 16:05:55,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:05:55,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:05:55,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 100 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 91 [2022-11-23 16:05:58,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:05:58,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:05:58,539 INFO L321 Elim1Store]: treesize reduction 177, result has 13.7 percent of original size [2022-11-23 16:05:58,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 3964 treesize of output 2598 [2022-11-23 16:05:59,188 INFO L321 Elim1Store]: treesize reduction 744, result has 13.6 percent of original size [2022-11-23 16:05:59,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 24 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 27 case distinctions, treesize of input 3862 treesize of output 3844 [2022-11-23 16:05:59,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:05:59,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:05:59,532 INFO L321 Elim1Store]: treesize reduction 165, result has 14.5 percent of original size [2022-11-23 16:05:59,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 3932 treesize of output 3887 [2022-11-23 16:06:03,685 INFO L321 Elim1Store]: treesize reduction 42, result has 39.1 percent of original size [2022-11-23 16:06:03,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 135 treesize of output 113 [2022-11-23 16:06:03,735 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-23 16:06:03,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 76 [2022-11-23 16:06:03,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-23 16:06:03,884 INFO L321 Elim1Store]: treesize reduction 42, result has 39.1 percent of original size [2022-11-23 16:06:03,884 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 135 treesize of output 113 [2022-11-23 16:06:03,936 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-23 16:06:03,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 76 [2022-11-23 16:06:03,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-23 16:06:04,215 INFO L321 Elim1Store]: treesize reduction 42, result has 39.1 percent of original size [2022-11-23 16:06:04,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 135 treesize of output 113 [2022-11-23 16:06:04,273 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-23 16:06:04,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 76 [2022-11-23 16:06:04,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 16:06:04,556 INFO L321 Elim1Store]: treesize reduction 37, result has 40.3 percent of original size [2022-11-23 16:06:04,557 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 96 [2022-11-23 16:06:04,605 INFO L321 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-11-23 16:06:04,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 64 [2022-11-23 16:06:04,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 16:06:04,824 INFO L321 Elim1Store]: treesize reduction 42, result has 39.1 percent of original size [2022-11-23 16:06:04,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 135 treesize of output 113 [2022-11-23 16:06:04,880 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-23 16:06:04,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 76 [2022-11-23 16:06:04,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 16:06:05,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 97 [2022-11-23 16:06:05,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-23 16:06:05,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-23 16:06:05,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-23 16:06:05,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-23 16:06:05,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-23 16:06:05,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2022-11-23 16:06:05,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2022-11-23 16:06:05,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-23 16:06:05,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 16:06:06,407 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.C_memset with input of size 119 for LOIs [2022-11-23 16:06:06,488 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 16:06:10,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1345552789] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:06:10,614 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-23 16:06:10,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [4, 4, 4] total 15 [2022-11-23 16:06:10,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837725967] [2022-11-23 16:06:10,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:06:10,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-23 16:06:10,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:06:10,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-23 16:06:10,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-11-23 16:06:10,617 INFO L87 Difference]: Start difference. First operand 886 states and 1293 transitions. Second operand has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 16:06:24,465 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:06:27,840 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:06:29,856 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 16:06:31,643 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:06:33,656 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:06:35,682 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 16:06:37,692 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:06:39,447 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:06:41,461 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:06:43,682 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:06:50,523 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 16:06:53,987 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:06:57,686 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:06:59,701 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:07:02,294 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:07:04,307 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:07:04,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:07:04,308 INFO L93 Difference]: Finished difference Result 1123 states and 1621 transitions. [2022-11-23 16:07:04,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-23 16:07:04,320 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 40 [2022-11-23 16:07:04,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:07:04,322 INFO L225 Difference]: With dead ends: 1123 [2022-11-23 16:07:04,322 INFO L226 Difference]: Without dead ends: 888 [2022-11-23 16:07:04,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 104 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-11-23 16:07:04,325 INFO L413 NwaCegarLoop]: 612 mSDtfsCounter, 20 mSDsluCounter, 2830 mSDsCounter, 0 mSdLazyCounter, 2028 mSolverCounterSat, 0 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 52.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 3442 SdHoareTripleChecker+Invalid, 2039 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2028 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 53.5s IncrementalHoareTripleChecker+Time [2022-11-23 16:07:04,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 3442 Invalid, 2039 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 2028 Invalid, 11 Unknown, 0 Unchecked, 53.5s Time] [2022-11-23 16:07:04,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 888 states. [2022-11-23 16:07:04,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 888 to 888. [2022-11-23 16:07:04,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 670 states have (on average 1.4) internal successors, (938), 676 states have internal predecessors, (938), 161 states have call successors, (161), 56 states have call predecessors, (161), 56 states have return successors, (196), 155 states have call predecessors, (196), 154 states have call successors, (196) [2022-11-23 16:07:04,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 1295 transitions. [2022-11-23 16:07:04,438 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 1295 transitions. Word has length 40 [2022-11-23 16:07:04,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:07:04,439 INFO L495 AbstractCegarLoop]: Abstraction has 888 states and 1295 transitions. [2022-11-23 16:07:04,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 16:07:04,439 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 1295 transitions. [2022-11-23 16:07:04,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-23 16:07:04,441 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:07:04,441 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:07:04,454 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbca4e56-a55d-43e4-95ff-f0e4470ba6e3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 16:07:04,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbca4e56-a55d-43e4-95ff-f0e4470ba6e3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:07:04,652 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:07:04,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:07:04,652 INFO L85 PathProgramCache]: Analyzing trace with hash -247957767, now seen corresponding path program 1 times [2022-11-23 16:07:04,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:07:04,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872744020] [2022-11-23 16:07:04,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:07:04,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:07:04,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:07:04,831 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 16:07:04,831 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:07:04,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872744020] [2022-11-23 16:07:04,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872744020] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:07:04,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918077683] [2022-11-23 16:07:04,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:07:04,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:07:04,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbca4e56-a55d-43e4-95ff-f0e4470ba6e3/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:07:04,833 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbca4e56-a55d-43e4-95ff-f0e4470ba6e3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:07:04,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbca4e56-a55d-43e4-95ff-f0e4470ba6e3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 16:07:05,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:07:05,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 650 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 16:07:05,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:07:06,018 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 16:07:06,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:07:06,058 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 16:07:06,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918077683] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:07:06,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1969579859] [2022-11-23 16:07:06,061 INFO L159 IcfgInterpreter]: Started Sifa with 38 locations of interest [2022-11-23 16:07:06,061 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 16:07:06,061 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 16:07:06,061 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 16:07:06,061 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 16:07:06,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:06,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:06,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:06,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:06,391 INFO L217 Elim1Store]: Index analysis took 119 ms [2022-11-23 16:07:06,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2022-11-23 16:07:06,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:06,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:06,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:06,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:06,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:06,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:06,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:06,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:06,743 INFO L217 Elim1Store]: Index analysis took 316 ms [2022-11-23 16:07:13,376 WARN L233 SmtUtils]: Spent 6.62s on a formula simplification. DAG size of input: 814 DAG size of output: 341 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-23 16:07:13,378 INFO L321 Elim1Store]: treesize reduction 4744, result has 21.3 percent of original size [2022-11-23 16:07:13,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 31 select indices, 31 select index equivalence classes, 488 disjoint index pairs (out of 465 index pairs), introduced 31 new quantified variables, introduced 34 case distinctions, treesize of input 192 treesize of output 1391 [2022-11-23 16:07:13,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:13,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:13,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:13,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:13,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:13,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:14,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:14,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:14,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:14,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:14,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:14,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:14,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:14,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:14,574 INFO L217 Elim1Store]: Index analysis took 901 ms [2022-11-23 16:07:28,265 WARN L233 SmtUtils]: Spent 13.67s on a formula simplification. DAG size of input: 1002 DAG size of output: 453 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-23 16:07:28,266 INFO L321 Elim1Store]: treesize reduction 6523, result has 17.2 percent of original size [2022-11-23 16:07:28,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 37 select indices, 37 select index equivalence classes, 509 disjoint index pairs (out of 666 index pairs), introduced 37 new quantified variables, introduced 194 case distinctions, treesize of input 292 treesize of output 1537 [2022-11-23 16:07:28,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:28,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:28,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 89 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 0 case distinctions, treesize of input 131 treesize of output 140 [2022-11-23 16:07:28,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:28,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 57 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 131 [2022-11-23 16:07:29,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 65 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2022-11-23 16:07:29,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:29,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:29,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:29,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 67 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 1221 treesize of output 533 [2022-11-23 16:07:29,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 58 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 150 [2022-11-23 16:07:29,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:29,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:29,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 100 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 91 [2022-11-23 16:07:32,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:32,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:32,850 INFO L321 Elim1Store]: treesize reduction 177, result has 13.7 percent of original size [2022-11-23 16:07:32,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 3964 treesize of output 2598 [2022-11-23 16:07:33,457 INFO L321 Elim1Store]: treesize reduction 744, result has 13.6 percent of original size [2022-11-23 16:07:33,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 24 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 27 case distinctions, treesize of input 3862 treesize of output 3844 [2022-11-23 16:07:33,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:33,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:33,833 INFO L321 Elim1Store]: treesize reduction 165, result has 14.5 percent of original size [2022-11-23 16:07:33,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 3932 treesize of output 3887 [2022-11-23 16:07:37,830 INFO L321 Elim1Store]: treesize reduction 42, result has 39.1 percent of original size [2022-11-23 16:07:37,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 135 treesize of output 113 [2022-11-23 16:07:37,879 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-23 16:07:37,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 76 [2022-11-23 16:07:37,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-23 16:07:38,004 INFO L321 Elim1Store]: treesize reduction 42, result has 39.1 percent of original size [2022-11-23 16:07:38,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 135 treesize of output 113 [2022-11-23 16:07:38,051 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-23 16:07:38,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 76 [2022-11-23 16:07:38,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 16:07:38,258 INFO L321 Elim1Store]: treesize reduction 42, result has 39.1 percent of original size [2022-11-23 16:07:38,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 135 treesize of output 113 [2022-11-23 16:07:38,316 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-23 16:07:38,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 76 [2022-11-23 16:07:38,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 16:07:38,549 INFO L321 Elim1Store]: treesize reduction 37, result has 40.3 percent of original size [2022-11-23 16:07:38,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 96 [2022-11-23 16:07:38,588 INFO L321 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-11-23 16:07:38,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 64 [2022-11-23 16:07:38,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 16:07:38,789 INFO L321 Elim1Store]: treesize reduction 42, result has 39.1 percent of original size [2022-11-23 16:07:38,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 135 treesize of output 113 [2022-11-23 16:07:38,843 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-23 16:07:38,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 76 [2022-11-23 16:07:38,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 16:07:39,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 97 [2022-11-23 16:07:39,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-23 16:07:39,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-23 16:07:39,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-23 16:07:39,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-23 16:07:39,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-23 16:07:39,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2022-11-23 16:07:39,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2022-11-23 16:07:39,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-23 16:07:39,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 16:07:40,122 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.C_memset with input of size 119 for LOIs [2022-11-23 16:07:40,167 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 16:07:43,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1969579859] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:07:43,257 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-23 16:07:43,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [4, 3, 4] total 14 [2022-11-23 16:07:43,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381120596] [2022-11-23 16:07:43,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:07:43,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-23 16:07:43,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:07:43,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-23 16:07:43,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-11-23 16:07:43,259 INFO L87 Difference]: Start difference. First operand 888 states and 1295 transitions. Second operand has 9 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 16:07:57,408 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:07:59,418 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 16:08:01,428 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:08:03,434 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:08:04,631 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:08:06,266 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:08:08,277 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:08:12,775 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:08:15,208 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:08:17,820 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:08:19,838 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:08:23,282 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:08:25,293 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 [] [2022-11-23 16:08:25,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:08:25,294 INFO L93 Difference]: Finished difference Result 1119 states and 1612 transitions. [2022-11-23 16:08:25,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 16:08:25,303 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 40 [2022-11-23 16:08:25,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:08:25,307 INFO L225 Difference]: With dead ends: 1119 [2022-11-23 16:08:25,307 INFO L226 Difference]: Without dead ends: 890 [2022-11-23 16:08:25,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 105 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-11-23 16:08:25,309 INFO L413 NwaCegarLoop]: 610 mSDtfsCounter, 20 mSDsluCounter, 2511 mSDsCounter, 0 mSdLazyCounter, 1633 mSolverCounterSat, 0 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 41.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 3121 SdHoareTripleChecker+Invalid, 1643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1633 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 41.9s IncrementalHoareTripleChecker+Time [2022-11-23 16:08:25,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 3121 Invalid, 1643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1633 Invalid, 10 Unknown, 0 Unchecked, 41.9s Time] [2022-11-23 16:08:25,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2022-11-23 16:08:25,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 888. [2022-11-23 16:08:25,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 670 states have (on average 1.4) internal successors, (938), 676 states have internal predecessors, (938), 161 states have call successors, (161), 56 states have call predecessors, (161), 56 states have return successors, (196), 155 states have call predecessors, (196), 154 states have call successors, (196) [2022-11-23 16:08:25,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 1295 transitions. [2022-11-23 16:08:25,423 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 1295 transitions. Word has length 40 [2022-11-23 16:08:25,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:08:25,424 INFO L495 AbstractCegarLoop]: Abstraction has 888 states and 1295 transitions. [2022-11-23 16:08:25,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 16:08:25,424 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 1295 transitions. [2022-11-23 16:08:25,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-23 16:08:25,426 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:08:25,426 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:08:25,439 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbca4e56-a55d-43e4-95ff-f0e4470ba6e3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 16:08:25,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbca4e56-a55d-43e4-95ff-f0e4470ba6e3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-23 16:08:25,637 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:08:25,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:08:25,638 INFO L85 PathProgramCache]: Analyzing trace with hash 218526244, now seen corresponding path program 1 times [2022-11-23 16:08:25,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:08:25,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015224202] [2022-11-23 16:08:25,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:08:25,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:08:25,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:08:25,793 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 16:08:25,794 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:08:25,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015224202] [2022-11-23 16:08:25,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015224202] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:08:25,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107788819] [2022-11-23 16:08:25,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:08:25,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:08:25,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbca4e56-a55d-43e4-95ff-f0e4470ba6e3/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:08:25,799 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbca4e56-a55d-43e4-95ff-f0e4470ba6e3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:08:25,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbca4e56-a55d-43e4-95ff-f0e4470ba6e3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 16:08:26,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:08:26,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 654 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-23 16:08:27,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:08:27,097 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 16:08:27,097 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 16:08:27,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107788819] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:08:27,098 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 16:08:27,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [4] total 11 [2022-11-23 16:08:27,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135082538] [2022-11-23 16:08:27,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:08:27,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-23 16:08:27,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:08:27,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-23 16:08:27,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2022-11-23 16:08:27,099 INFO L87 Difference]: Start difference. First operand 888 states and 1295 transitions. Second operand has 9 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-23 16:08:33,378 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 [] [2022-11-23 16:08:35,428 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:08:39,129 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:08:41,828 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:08:43,839 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:08:47,082 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:08:49,097 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:08:51,110 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 [] [2022-11-23 16:08:51,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:08:51,122 INFO L93 Difference]: Finished difference Result 901 states and 1307 transitions. [2022-11-23 16:08:51,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 16:08:51,123 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 41 [2022-11-23 16:08:51,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:08:51,131 INFO L225 Difference]: With dead ends: 901 [2022-11-23 16:08:51,131 INFO L226 Difference]: Without dead ends: 886 [2022-11-23 16:08:51,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2022-11-23 16:08:51,133 INFO L413 NwaCegarLoop]: 619 mSDtfsCounter, 10 mSDsluCounter, 4222 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 2 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 4841 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.9s IncrementalHoareTripleChecker+Time [2022-11-23 16:08:51,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 4841 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 651 Invalid, 7 Unknown, 0 Unchecked, 23.9s Time] [2022-11-23 16:08:51,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 886 states. [2022-11-23 16:08:51,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 886 to 886. [2022-11-23 16:08:51,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 886 states, 669 states have (on average 1.399103139013453) internal successors, (936), 675 states have internal predecessors, (936), 160 states have call successors, (160), 56 states have call predecessors, (160), 56 states have return successors, (195), 154 states have call predecessors, (195), 153 states have call successors, (195) [2022-11-23 16:08:51,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 1291 transitions. [2022-11-23 16:08:51,258 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 1291 transitions. Word has length 41 [2022-11-23 16:08:51,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:08:51,258 INFO L495 AbstractCegarLoop]: Abstraction has 886 states and 1291 transitions. [2022-11-23 16:08:51,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-23 16:08:51,258 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 1291 transitions. [2022-11-23 16:08:51,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-23 16:08:51,260 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:08:51,261 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:08:51,275 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbca4e56-a55d-43e4-95ff-f0e4470ba6e3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 16:08:51,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbca4e56-a55d-43e4-95ff-f0e4470ba6e3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-23 16:08:51,470 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:08:51,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:08:51,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1184800479, now seen corresponding path program 1 times [2022-11-23 16:08:51,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:08:51,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228107079] [2022-11-23 16:08:51,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:08:51,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:08:51,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:08:51,647 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 16:08:51,647 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:08:51,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228107079] [2022-11-23 16:08:51,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228107079] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:08:51,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013577982] [2022-11-23 16:08:51,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:08:51,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:08:51,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbca4e56-a55d-43e4-95ff-f0e4470ba6e3/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:08:51,649 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbca4e56-a55d-43e4-95ff-f0e4470ba6e3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:08:51,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbca4e56-a55d-43e4-95ff-f0e4470ba6e3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 16:08:52,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:08:52,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 665 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-23 16:08:52,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:08:52,851 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 16:08:52,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:08:52,885 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 16:08:52,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013577982] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:08:52,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1147997297] [2022-11-23 16:08:52,889 INFO L159 IcfgInterpreter]: Started Sifa with 38 locations of interest [2022-11-23 16:08:52,889 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 16:08:52,889 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 16:08:52,889 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 16:08:52,890 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 16:08:53,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:08:53,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:08:53,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:08:53,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:08:53,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:08:53,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:08:53,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:08:53,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:08:53,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:08:53,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:08:53,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:08:53,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:08:53,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:08:53,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:08:53,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:08:53,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:08:53,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:08:53,090 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 43 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 0 case distinctions, treesize of input 131 treesize of output 140 [2022-11-23 16:08:53,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:08:53,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:08:53,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:08:53,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:08:53,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:08:53,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:08:53,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:08:53,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:08:53,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:08:53,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:08:53,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:08:53,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:08:53,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:08:53,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:08:53,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:08:53,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 41 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 140 [2022-11-23 16:08:53,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:08:53,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:08:53,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2022-11-23 16:08:53,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:08:53,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:08:53,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:08:53,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:08:53,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2022-11-23 16:08:53,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:08:53,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:08:53,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:08:53,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:08:53,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:08:53,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:08:53,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:08:53,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:08:53,663 INFO L217 Elim1Store]: Index analysis took 319 ms [2022-11-23 16:09:00,860 WARN L233 SmtUtils]: Spent 7.18s on a formula simplification. DAG size of input: 814 DAG size of output: 341 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-23 16:09:00,862 INFO L321 Elim1Store]: treesize reduction 4744, result has 21.3 percent of original size [2022-11-23 16:09:00,862 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 31 select indices, 31 select index equivalence classes, 488 disjoint index pairs (out of 465 index pairs), introduced 31 new quantified variables, introduced 34 case distinctions, treesize of input 192 treesize of output 1391 [2022-11-23 16:09:01,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:09:01,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:09:01,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:09:01,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:09:01,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:09:01,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:09:01,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:09:01,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:09:01,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:09:01,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:09:01,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:09:01,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:09:02,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:09:02,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:09:02,252 INFO L217 Elim1Store]: Index analysis took 1096 ms [2022-11-23 16:09:15,253 WARN L233 SmtUtils]: Spent 12.99s on a formula simplification. DAG size of input: 1002 DAG size of output: 453 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-23 16:09:15,255 INFO L321 Elim1Store]: treesize reduction 6523, result has 17.2 percent of original size [2022-11-23 16:09:15,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 37 select indices, 37 select index equivalence classes, 509 disjoint index pairs (out of 666 index pairs), introduced 37 new quantified variables, introduced 194 case distinctions, treesize of input 292 treesize of output 1537 [2022-11-23 16:09:16,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:09:16,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:09:16,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:09:16,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 67 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 1221 treesize of output 533 [2022-11-23 16:09:16,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 58 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 150 [2022-11-23 16:09:16,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:09:16,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:09:16,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 100 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 91 [2022-11-23 16:09:19,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:09:19,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:09:19,414 INFO L321 Elim1Store]: treesize reduction 177, result has 13.7 percent of original size [2022-11-23 16:09:19,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 3964 treesize of output 2598 [2022-11-23 16:09:19,987 INFO L321 Elim1Store]: treesize reduction 744, result has 13.6 percent of original size [2022-11-23 16:09:19,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 24 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 27 case distinctions, treesize of input 3862 treesize of output 3844 [2022-11-23 16:09:20,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:09:20,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:09:20,314 INFO L321 Elim1Store]: treesize reduction 165, result has 14.5 percent of original size [2022-11-23 16:09:20,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 3932 treesize of output 3887 [2022-11-23 16:09:24,290 INFO L321 Elim1Store]: treesize reduction 42, result has 39.1 percent of original size [2022-11-23 16:09:24,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 135 treesize of output 113 [2022-11-23 16:09:24,340 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-23 16:09:24,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 76 [2022-11-23 16:09:24,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-23 16:09:24,462 INFO L321 Elim1Store]: treesize reduction 37, result has 40.3 percent of original size [2022-11-23 16:09:24,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 96 [2022-11-23 16:09:24,506 INFO L321 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-11-23 16:09:24,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 64 [2022-11-23 16:09:24,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 16:09:24,645 INFO L321 Elim1Store]: treesize reduction 42, result has 39.1 percent of original size [2022-11-23 16:09:24,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 135 treesize of output 113 [2022-11-23 16:09:24,694 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-23 16:09:24,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 76 [2022-11-23 16:09:24,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-23 16:09:24,941 INFO L321 Elim1Store]: treesize reduction 42, result has 39.1 percent of original size [2022-11-23 16:09:24,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 135 treesize of output 113 [2022-11-23 16:09:24,993 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-23 16:09:24,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 76 [2022-11-23 16:09:25,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 16:09:25,168 INFO L321 Elim1Store]: treesize reduction 42, result has 39.1 percent of original size [2022-11-23 16:09:25,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 135 treesize of output 113 [2022-11-23 16:09:25,224 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-23 16:09:25,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 76 [2022-11-23 16:09:25,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 16:09:25,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 97 [2022-11-23 16:09:25,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-23 16:09:25,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-23 16:09:25,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-23 16:09:25,801 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-23 16:09:25,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2022-11-23 16:09:25,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-23 16:09:25,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2022-11-23 16:09:25,982 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-23 16:09:26,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 16:09:26,149 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 16:09:26,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 16:09:26,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 16:09:26,193 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-23 16:09:26,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 54 [2022-11-23 16:09:26,221 INFO L321 Elim1Store]: treesize reduction 15, result has 42.3 percent of original size [2022-11-23 16:09:26,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 52 [2022-11-23 16:09:26,245 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-23 16:09:26,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 46 [2022-11-23 16:09:26,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-23 16:09:26,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-23 16:09:26,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-23 16:09:26,386 INFO L321 Elim1Store]: treesize reduction 3, result has 78.6 percent of original size [2022-11-23 16:09:26,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 43 [2022-11-23 16:09:26,429 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 16:09:26,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:09:26,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:09:26,441 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 16:09:26,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 13 [2022-11-23 16:09:26,466 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 16:09:26,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:09:26,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:09:26,478 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 16:09:26,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 13 [2022-11-23 16:09:26,702 INFO L321 Elim1Store]: treesize reduction 3, result has 78.6 percent of original size [2022-11-23 16:09:26,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 43 [2022-11-23 16:09:26,737 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 16:09:26,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:09:26,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:09:26,749 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 16:09:26,749 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 13 [2022-11-23 16:09:26,774 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 16:09:26,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:09:26,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:09:26,786 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 16:09:26,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 13 [2022-11-23 16:09:27,078 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-23 16:09:27,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 34 [2022-11-23 16:09:27,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-23 16:09:27,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-23 16:09:27,278 INFO L321 Elim1Store]: treesize reduction 35, result has 35.2 percent of original size [2022-11-23 16:09:27,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 56 treesize of output 62 [2022-11-23 16:09:27,322 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-23 16:09:27,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-23 16:09:27,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 16:09:28,431 INFO L197 IcfgInterpreter]: Interpreting procedure errorFn with input of size 85 for LOIs [2022-11-23 16:09:28,454 INFO L197 IcfgInterpreter]: Interpreting procedure IofCompleteRequest with input of size 89 for LOIs [2022-11-23 16:09:28,483 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.C_memset with input of size 119 for LOIs [2022-11-23 16:09:28,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-23 16:09:28,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-23 16:09:28,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-23 16:09:28,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-23 16:09:28,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-23 16:09:28,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-23 16:09:28,771 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 16:09:41,635 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '76115#(and (<= ~pirp~0.offset 0) (<= ~pended~0 0) (<= (+ ~myStatus~0 1073741789) 0) (<= ~lowerDriverReturn~0 0) (<= 0 ~pended~0) (= 2 ~DC~0) (= ~s~0 ~DC~0) (<= ~setEventCalled~0 0) (= ~SKIP2~0 4) (<= 0 ~lowerDriverReturn~0) (= ~myIrp_PendingReturned~0 0) (<= 0 (+ ~myStatus~0 1073741789)) (<= 0 ~setEventCalled~0) (<= 0 ~compFptr~0.offset) (= 7 ~IPC~0) (exists ((|v_ULTIMATE.start_CdAudio435DeviceControl_~#srb~7#1.base_42| Int)) (and (<= 0 |v_ULTIMATE.start_CdAudio435DeviceControl_~#srb~7#1.base_42|) (= (select |#valid| |v_ULTIMATE.start_CdAudio435DeviceControl_~#srb~7#1.base_42|) 0))) (= ~__BLAST_NONDET~0 0) (<= 0 ~pirp~0.base) (= ~routine~0 0) (= ~compFptr~0.base 0) (<= ~compRegistered~0 0) (= ~MPR1~0 5) (= ~customIrp~0 0) (= ~NP~0 1) (= |#NULL.offset| 0) (<= 0 ~pirp~0.offset) (<= 0 ~compRegistered~0) (= ~_SLAM_alloc_dummy~0 0) (<= 0 |#StackHeapBarrier|) (= ~MPR3~0 6) (<= ~compFptr~0.offset 0) (= ~SKIP1~0 3) (= ~UNLOADED~0 0) (= |#NULL.base| 0))' at error location [2022-11-23 16:09:41,635 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 16:09:41,635 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 16:09:41,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 7 [2022-11-23 16:09:41,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110110927] [2022-11-23 16:09:41,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 16:09:41,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 16:09:41,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:09:41,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 16:09:41,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=740, Unknown=0, NotChecked=0, Total=812 [2022-11-23 16:09:41,638 INFO L87 Difference]: Start difference. First operand 886 states and 1291 transitions. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 1 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-23 16:09:47,077 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 [] [2022-11-23 16:09:49,124 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:09:52,469 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:09:55,878 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:09:59,512 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:10:01,527 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:10:03,546 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:10:03,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:10:03,548 INFO L93 Difference]: Finished difference Result 1776 states and 2592 transitions. [2022-11-23 16:10:03,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 16:10:03,553 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 1 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 41 [2022-11-23 16:10:03,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:10:03,557 INFO L225 Difference]: With dead ends: 1776 [2022-11-23 16:10:03,557 INFO L226 Difference]: Without dead ends: 893 [2022-11-23 16:10:03,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 87 SyntacticMatches, 11 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=79, Invalid=791, Unknown=0, NotChecked=0, Total=870 [2022-11-23 16:10:03,560 INFO L413 NwaCegarLoop]: 614 mSDtfsCounter, 0 mSDsluCounter, 3070 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 18 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 3684 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.7s IncrementalHoareTripleChecker+Time [2022-11-23 16:10:03,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 3684 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 388 Invalid, 6 Unknown, 0 Unchecked, 21.7s Time] [2022-11-23 16:10:03,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2022-11-23 16:10:03,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 893. [2022-11-23 16:10:03,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 676 states have (on average 1.3949704142011834) internal successors, (943), 682 states have internal predecessors, (943), 160 states have call successors, (160), 56 states have call predecessors, (160), 56 states have return successors, (195), 154 states have call predecessors, (195), 153 states have call successors, (195) [2022-11-23 16:10:03,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 1298 transitions. [2022-11-23 16:10:03,673 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 1298 transitions. Word has length 41 [2022-11-23 16:10:03,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:10:03,674 INFO L495 AbstractCegarLoop]: Abstraction has 893 states and 1298 transitions. [2022-11-23 16:10:03,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 1 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-23 16:10:03,674 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 1298 transitions. [2022-11-23 16:10:03,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-23 16:10:03,676 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:10:03,676 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 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] [2022-11-23 16:10:03,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbca4e56-a55d-43e4-95ff-f0e4470ba6e3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 16:10:03,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbca4e56-a55d-43e4-95ff-f0e4470ba6e3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:10:03,892 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:10:03,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:10:03,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1376760348, now seen corresponding path program 2 times [2022-11-23 16:10:03,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:10:03,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997415971] [2022-11-23 16:10:03,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:10:03,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:10:03,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:10:04,227 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-23 16:10:04,227 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:10:04,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997415971] [2022-11-23 16:10:04,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997415971] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:10:04,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454969803] [2022-11-23 16:10:04,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 16:10:04,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:10:04,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbca4e56-a55d-43e4-95ff-f0e4470ba6e3/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:10:04,231 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbca4e56-a55d-43e4-95ff-f0e4470ba6e3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:10:04,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbca4e56-a55d-43e4-95ff-f0e4470ba6e3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 16:10:05,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-23 16:10:05,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 16:10:05,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 716 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-23 16:10:05,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:10:05,929 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-23 16:10:05,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:10:06,002 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-23 16:10:06,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454969803] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:10:06,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [778680906] [2022-11-23 16:10:06,006 INFO L159 IcfgInterpreter]: Started Sifa with 38 locations of interest [2022-11-23 16:10:06,006 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 16:10:06,006 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 16:10:06,007 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 16:10:06,007 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 16:10:06,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:10:06,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:10:06,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2022-11-23 16:10:06,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:10:06,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:10:06,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:10:06,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:10:06,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2022-11-23 16:10:06,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:10:06,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:10:06,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:10:06,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:10:06,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:10:06,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:10:06,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:10:06,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:10:06,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:10:06,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:10:06,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:10:06,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:10:06,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:10:06,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:10:06,686 INFO L217 Elim1Store]: Index analysis took 302 ms [2022-11-23 16:10:20,014 WARN L233 SmtUtils]: Spent 13.31s on a formula simplification. DAG size of input: 1002 DAG size of output: 453 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-23 16:10:20,016 INFO L321 Elim1Store]: treesize reduction 6523, result has 17.2 percent of original size [2022-11-23 16:10:20,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 37 select indices, 37 select index equivalence classes, 509 disjoint index pairs (out of 666 index pairs), introduced 37 new quantified variables, introduced 194 case distinctions, treesize of input 292 treesize of output 1537 [2022-11-23 16:10:20,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:10:20,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:10:20,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:10:20,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:10:20,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:10:20,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:10:20,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:10:20,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:10:20,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 31 select indices, 31 select index equivalence classes, 645 disjoint index pairs (out of 465 index pairs), introduced 31 new quantified variables, introduced 0 case distinctions, treesize of input 192 treesize of output 292 [2022-11-23 16:10:20,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:10:20,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:10:20,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 90 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 0 case distinctions, treesize of input 136 treesize of output 149 [2022-11-23 16:10:21,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:10:21,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:10:21,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:10:21,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 67 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 1236 treesize of output 548 [2022-11-23 16:10:21,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 58 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 153 [2022-11-23 16:10:21,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:10:21,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:10:21,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 100 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 104 [2022-11-23 16:10:24,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:10:24,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:10:24,521 INFO L321 Elim1Store]: treesize reduction 177, result has 13.7 percent of original size [2022-11-23 16:10:24,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 3989 treesize of output 2623 [2022-11-23 16:10:25,213 INFO L321 Elim1Store]: treesize reduction 1014, result has 8.3 percent of original size [2022-11-23 16:10:25,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 25 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 26 case distinctions, treesize of input 3887 treesize of output 3848 [2022-11-23 16:10:25,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:10:25,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:10:25,548 INFO L321 Elim1Store]: treesize reduction 165, result has 14.5 percent of original size [2022-11-23 16:10:25,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 3952 treesize of output 3901 [2022-11-23 16:10:27,357 INFO L321 Elim1Store]: treesize reduction 42, result has 39.1 percent of original size [2022-11-23 16:10:27,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 135 treesize of output 113 [2022-11-23 16:10:27,406 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-23 16:10:27,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 76 [2022-11-23 16:10:27,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 16:10:27,532 INFO L321 Elim1Store]: treesize reduction 37, result has 40.3 percent of original size [2022-11-23 16:10:27,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 96 [2022-11-23 16:10:27,578 INFO L321 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-11-23 16:10:27,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 64 [2022-11-23 16:10:27,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 16:10:27,727 INFO L321 Elim1Store]: treesize reduction 42, result has 39.1 percent of original size [2022-11-23 16:10:27,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 135 treesize of output 113 [2022-11-23 16:10:27,781 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-23 16:10:27,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 76 [2022-11-23 16:10:27,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-23 16:10:28,033 INFO L321 Elim1Store]: treesize reduction 37, result has 40.3 percent of original size [2022-11-23 16:10:28,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 96 [2022-11-23 16:10:28,079 INFO L321 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-11-23 16:10:28,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 64 [2022-11-23 16:10:28,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 16:10:28,268 INFO L321 Elim1Store]: treesize reduction 42, result has 39.1 percent of original size [2022-11-23 16:10:28,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 135 treesize of output 113 [2022-11-23 16:10:28,327 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-23 16:10:28,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 76 [2022-11-23 16:10:28,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 16:10:28,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 97 [2022-11-23 16:10:28,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-23 16:10:28,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-23 16:10:29,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-23 16:10:29,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-23 16:10:29,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2022-11-23 16:10:29,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2022-11-23 16:10:29,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-23 16:10:29,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-23 16:10:29,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 16:10:29,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-23 16:10:29,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-23 16:10:29,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-23 16:10:29,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 65 [2022-11-23 16:10:29,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 63 [2022-11-23 16:10:29,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 63 [2022-11-23 16:10:29,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-23 16:10:29,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-23 16:10:29,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-23 16:10:29,597 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 16:10:29,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:10:29,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:10:29,610 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 16:10:29,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 13 [2022-11-23 16:10:29,637 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 16:10:29,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:10:29,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:10:29,650 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 16:10:29,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 13 [2022-11-23 16:10:29,703 INFO L321 Elim1Store]: treesize reduction 3, result has 78.6 percent of original size [2022-11-23 16:10:29,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 43 [2022-11-23 16:10:29,959 INFO L321 Elim1Store]: treesize reduction 3, result has 78.6 percent of original size [2022-11-23 16:10:29,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 43 [2022-11-23 16:10:29,997 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 16:10:29,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:10:30,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:10:30,009 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 16:10:30,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 13 [2022-11-23 16:10:30,043 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 16:10:30,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:10:30,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:10:30,055 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 16:10:30,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 13 [2022-11-23 16:10:30,320 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-23 16:10:30,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 34 [2022-11-23 16:10:30,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-23 16:10:30,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-23 16:10:30,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-23 16:10:30,529 INFO L321 Elim1Store]: treesize reduction 35, result has 35.2 percent of original size [2022-11-23 16:10:30,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 56 treesize of output 62 [2022-11-23 16:10:30,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-23 16:10:30,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 16:10:31,732 INFO L197 IcfgInterpreter]: Interpreting procedure errorFn with input of size 85 for LOIs [2022-11-23 16:10:31,756 INFO L197 IcfgInterpreter]: Interpreting procedure IofCompleteRequest with input of size 89 for LOIs [2022-11-23 16:10:31,779 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.C_memset with input of size 119 for LOIs [2022-11-23 16:10:31,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-23 16:10:31,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-23 16:10:31,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-23 16:10:32,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-23 16:10:32,034 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-23 16:10:32,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-23 16:10:32,060 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 16:10:47,902 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '80159#(and (<= ~pirp~0.offset 0) (<= ~pended~0 0) (<= (+ ~myStatus~0 1073741789) 0) (<= ~lowerDriverReturn~0 0) (<= 0 ~pended~0) (= 2 ~DC~0) (= ~s~0 ~DC~0) (<= ~setEventCalled~0 0) (= ~SKIP2~0 4) (<= 0 ~lowerDriverReturn~0) (exists ((|v_ULTIMATE.start_CdAudio435DeviceControl_~#srb~7#1.base_44| Int)) (and (<= 0 |v_ULTIMATE.start_CdAudio435DeviceControl_~#srb~7#1.base_44|) (= (select |#valid| |v_ULTIMATE.start_CdAudio435DeviceControl_~#srb~7#1.base_44|) 0))) (= ~myIrp_PendingReturned~0 0) (<= 0 (+ ~myStatus~0 1073741789)) (<= 0 ~setEventCalled~0) (<= 0 ~compFptr~0.offset) (= 7 ~IPC~0) (= ~__BLAST_NONDET~0 0) (<= 0 ~pirp~0.base) (= ~routine~0 0) (= ~compFptr~0.base 0) (<= ~compRegistered~0 0) (= ~MPR1~0 5) (= ~customIrp~0 0) (= ~NP~0 1) (= |#NULL.offset| 0) (<= 0 ~pirp~0.offset) (<= 0 ~compRegistered~0) (= ~_SLAM_alloc_dummy~0 0) (<= 0 |#StackHeapBarrier|) (= ~MPR3~0 6) (<= ~compFptr~0.offset 0) (= ~SKIP1~0 3) (= ~UNLOADED~0 0) (= |#NULL.base| 0))' at error location [2022-11-23 16:10:47,902 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 16:10:47,903 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 16:10:47,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 10 [2022-11-23 16:10:47,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107106457] [2022-11-23 16:10:47,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 16:10:47,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-23 16:10:47,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:10:47,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-23 16:10:47,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=903, Unknown=0, NotChecked=0, Total=992 [2022-11-23 16:10:47,905 INFO L87 Difference]: Start difference. First operand 893 states and 1298 transitions. Second operand has 10 states, 10 states have (on average 5.5) internal successors, (55), 10 states have internal predecessors, (55), 1 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-23 16:10:54,735 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:10:58,223 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:11:00,296 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:11:02,413 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:11:06,167 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:11:09,734 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:11:11,751 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 [] [2022-11-23 16:11:11,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:11:11,752 INFO L93 Difference]: Finished difference Result 1794 states and 2617 transitions. [2022-11-23 16:11:11,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-23 16:11:11,757 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.5) internal successors, (55), 10 states have internal predecessors, (55), 1 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 48 [2022-11-23 16:11:11,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:11:11,761 INFO L225 Difference]: With dead ends: 1794 [2022-11-23 16:11:11,761 INFO L226 Difference]: Without dead ends: 907 [2022-11-23 16:11:11,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 105 SyntacticMatches, 16 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 16.1s TimeCoverageRelationStatistics Valid=109, Invalid=1013, Unknown=0, NotChecked=0, Total=1122 [2022-11-23 16:11:11,764 INFO L413 NwaCegarLoop]: 614 mSDtfsCounter, 0 mSDsluCounter, 3684 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 46 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4298 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.5s IncrementalHoareTripleChecker+Time [2022-11-23 16:11:11,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 4298 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 495 Invalid, 6 Unknown, 0 Unchecked, 23.5s Time] [2022-11-23 16:11:11,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 907 states. [2022-11-23 16:11:11,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 907 to 907. [2022-11-23 16:11:11,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 907 states, 690 states have (on average 1.3869565217391304) internal successors, (957), 696 states have internal predecessors, (957), 160 states have call successors, (160), 56 states have call predecessors, (160), 56 states have return successors, (195), 154 states have call predecessors, (195), 153 states have call successors, (195) [2022-11-23 16:11:11,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 907 states to 907 states and 1312 transitions. [2022-11-23 16:11:11,921 INFO L78 Accepts]: Start accepts. Automaton has 907 states and 1312 transitions. Word has length 48 [2022-11-23 16:11:11,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:11:11,921 INFO L495 AbstractCegarLoop]: Abstraction has 907 states and 1312 transitions. [2022-11-23 16:11:11,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.5) internal successors, (55), 10 states have internal predecessors, (55), 1 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-23 16:11:11,921 INFO L276 IsEmpty]: Start isEmpty. Operand 907 states and 1312 transitions. [2022-11-23 16:11:11,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-23 16:11:11,924 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:11:11,924 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:11:11,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbca4e56-a55d-43e4-95ff-f0e4470ba6e3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-23 16:11:12,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbca4e56-a55d-43e4-95ff-f0e4470ba6e3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:11:12,141 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:11:12,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:11:12,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1976574020, now seen corresponding path program 3 times [2022-11-23 16:11:12,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:11:12,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880402368] [2022-11-23 16:11:12,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:11:12,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:11:12,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:11:12,832 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-11-23 16:11:12,832 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:11:12,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880402368] [2022-11-23 16:11:12,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880402368] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:11:12,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480518467] [2022-11-23 16:11:12,833 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 16:11:12,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:11:12,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbca4e56-a55d-43e4-95ff-f0e4470ba6e3/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:11:12,835 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbca4e56-a55d-43e4-95ff-f0e4470ba6e3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:11:12,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbca4e56-a55d-43e4-95ff-f0e4470ba6e3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-23 16:11:14,560 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 16:11:14,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 16:11:14,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 1022 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-23 16:11:14,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:11:14,648 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-11-23 16:11:14,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:11:15,035 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-11-23 16:11:15,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480518467] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:11:15,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [904840803] [2022-11-23 16:11:15,038 INFO L159 IcfgInterpreter]: Started Sifa with 38 locations of interest [2022-11-23 16:11:15,039 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 16:11:15,039 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 16:11:15,039 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 16:11:15,040 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 16:11:15,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:11:15,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:11:15,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:11:15,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:11:15,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2022-11-23 16:11:15,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:11:15,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:11:15,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:11:15,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:11:15,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:11:15,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:11:15,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:11:15,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:11:15,655 INFO L217 Elim1Store]: Index analysis took 328 ms [2022-11-23 16:11:23,396 WARN L233 SmtUtils]: Spent 7.73s on a formula simplification. DAG size of input: 814 DAG size of output: 341 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-23 16:11:23,398 INFO L321 Elim1Store]: treesize reduction 4744, result has 21.3 percent of original size [2022-11-23 16:11:23,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 31 select indices, 31 select index equivalence classes, 488 disjoint index pairs (out of 465 index pairs), introduced 31 new quantified variables, introduced 34 case distinctions, treesize of input 192 treesize of output 1391 [2022-11-23 16:11:23,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:11:23,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:11:23,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:11:23,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:11:23,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:11:23,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:11:24,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:11:24,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:11:24,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:11:24,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:11:24,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:11:24,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:11:24,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:11:24,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:11:24,590 INFO L217 Elim1Store]: Index analysis took 910 ms [2022-11-23 16:11:39,362 WARN L233 SmtUtils]: Spent 14.76s on a formula simplification. DAG size of input: 1002 DAG size of output: 453 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-23 16:11:39,364 INFO L321 Elim1Store]: treesize reduction 6523, result has 17.2 percent of original size [2022-11-23 16:11:39,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 37 select indices, 37 select index equivalence classes, 509 disjoint index pairs (out of 666 index pairs), introduced 37 new quantified variables, introduced 194 case distinctions, treesize of input 292 treesize of output 1537 [2022-11-23 16:11:39,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:11:39,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:11:39,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 89 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 0 case distinctions, treesize of input 131 treesize of output 140 [2022-11-23 16:11:40,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:11:40,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 58 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 140 [2022-11-23 16:11:40,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 65 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2022-11-23 16:11:40,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:11:40,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:11:40,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:11:40,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 67 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 1236 treesize of output 548 [2022-11-23 16:11:41,059 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 58 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 153 [2022-11-23 16:11:41,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:11:41,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:11:41,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 100 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 104 [2022-11-23 16:11:43,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:11:43,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:11:44,004 INFO L321 Elim1Store]: treesize reduction 177, result has 13.7 percent of original size [2022-11-23 16:11:44,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 3975 treesize of output 2609 [2022-11-23 16:11:44,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:11:44,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:11:44,379 INFO L321 Elim1Store]: treesize reduction 165, result has 14.5 percent of original size [2022-11-23 16:11:44,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 3924 treesize of output 3891 [2022-11-23 16:11:44,962 INFO L321 Elim1Store]: treesize reduction 950, result has 10.1 percent of original size [2022-11-23 16:11:44,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 24 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 27 case distinctions, treesize of input 3873 treesize of output 3841 [2022-11-23 16:11:46,834 INFO L321 Elim1Store]: treesize reduction 42, result has 39.1 percent of original size [2022-11-23 16:11:46,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 135 treesize of output 113 [2022-11-23 16:11:46,885 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-23 16:11:46,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 76 [2022-11-23 16:11:46,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-23 16:11:47,114 INFO L321 Elim1Store]: treesize reduction 42, result has 39.1 percent of original size [2022-11-23 16:11:47,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 135 treesize of output 113 [2022-11-23 16:11:47,161 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-23 16:11:47,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 76 [2022-11-23 16:11:47,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 16:11:47,356 INFO L321 Elim1Store]: treesize reduction 42, result has 39.1 percent of original size [2022-11-23 16:11:47,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 135 treesize of output 113 [2022-11-23 16:11:47,417 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-23 16:11:47,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 76 [2022-11-23 16:11:47,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 16:11:47,744 INFO L321 Elim1Store]: treesize reduction 42, result has 39.1 percent of original size [2022-11-23 16:11:47,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 135 treesize of output 113 [2022-11-23 16:11:47,798 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-23 16:11:47,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 76 [2022-11-23 16:11:47,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 16:11:47,982 INFO L321 Elim1Store]: treesize reduction 42, result has 39.1 percent of original size [2022-11-23 16:11:47,982 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 135 treesize of output 113 [2022-11-23 16:11:48,038 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-23 16:11:48,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 76 [2022-11-23 16:11:48,059 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 16:11:48,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 97 [2022-11-23 16:11:48,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-23 16:11:48,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-23 16:11:48,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-23 16:11:48,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-23 16:11:48,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2022-11-23 16:11:48,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2022-11-23 16:11:48,801 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-23 16:11:48,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-23 16:11:48,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 16:11:49,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 16:11:49,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 16:11:49,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 16:11:49,225 INFO L321 Elim1Store]: treesize reduction 15, result has 42.3 percent of original size [2022-11-23 16:11:49,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 56 [2022-11-23 16:11:49,268 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-23 16:11:49,269 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 50 [2022-11-23 16:11:49,316 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-23 16:11:49,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 46 [2022-11-23 16:11:49,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-23 16:11:49,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-23 16:11:49,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-23 16:11:49,449 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 16:11:49,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:11:49,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:11:49,463 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 16:11:49,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 13 [2022-11-23 16:11:49,532 INFO L321 Elim1Store]: treesize reduction 3, result has 78.6 percent of original size [2022-11-23 16:11:49,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 43 [2022-11-23 16:11:49,578 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 16:11:49,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:11:49,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:11:49,593 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 16:11:49,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 13 [2022-11-23 16:11:49,832 INFO L321 Elim1Store]: treesize reduction 3, result has 78.6 percent of original size [2022-11-23 16:11:49,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 43 [2022-11-23 16:11:49,875 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 16:11:49,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:11:49,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:11:49,891 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 16:11:49,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 13 [2022-11-23 16:11:49,924 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 16:11:49,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:11:49,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:11:49,940 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 16:11:49,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 13 [2022-11-23 16:11:50,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-23 16:11:50,283 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-23 16:11:50,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 34 [2022-11-23 16:11:50,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-23 16:11:50,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-23 16:11:50,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-23 16:11:50,519 INFO L321 Elim1Store]: treesize reduction 35, result has 35.2 percent of original size [2022-11-23 16:11:50,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 56 treesize of output 62 [2022-11-23 16:11:50,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 16:11:51,797 INFO L197 IcfgInterpreter]: Interpreting procedure errorFn with input of size 85 for LOIs [2022-11-23 16:11:51,815 INFO L197 IcfgInterpreter]: Interpreting procedure IofCompleteRequest with input of size 90 for LOIs [2022-11-23 16:11:51,835 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.C_memset with input of size 119 for LOIs [2022-11-23 16:11:51,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-23 16:11:51,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-23 16:11:52,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-23 16:11:52,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-23 16:11:52,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-23 16:11:52,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-23 16:11:52,127 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 16:12:09,227 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '84366#(and (<= ~pirp~0.offset 0) (<= ~pended~0 0) (<= (+ ~myStatus~0 1073741789) 0) (<= ~lowerDriverReturn~0 0) (<= 0 ~pended~0) (= 2 ~DC~0) (= ~s~0 ~DC~0) (<= ~setEventCalled~0 0) (= ~SKIP2~0 4) (<= 0 ~lowerDriverReturn~0) (= ~myIrp_PendingReturned~0 0) (<= 0 (+ ~myStatus~0 1073741789)) (<= 0 ~setEventCalled~0) (<= 0 ~compFptr~0.offset) (= 7 ~IPC~0) (= ~__BLAST_NONDET~0 0) (<= 0 ~pirp~0.base) (= ~routine~0 0) (= ~compFptr~0.base 0) (<= ~compRegistered~0 0) (exists ((|v_ULTIMATE.start_CdAudio435DeviceControl_~#srb~7#1.base_46| Int)) (and (= (select |#valid| |v_ULTIMATE.start_CdAudio435DeviceControl_~#srb~7#1.base_46|) 0) (<= 0 |v_ULTIMATE.start_CdAudio435DeviceControl_~#srb~7#1.base_46|))) (= ~MPR1~0 5) (= ~customIrp~0 0) (= ~NP~0 1) (= |#NULL.offset| 0) (<= 0 ~pirp~0.offset) (<= 0 ~compRegistered~0) (= ~_SLAM_alloc_dummy~0 0) (<= 0 |#StackHeapBarrier|) (= ~MPR3~0 6) (<= ~compFptr~0.offset 0) (= ~SKIP1~0 3) (= ~UNLOADED~0 0) (= |#NULL.base| 0))' at error location [2022-11-23 16:12:09,227 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 16:12:09,227 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 16:12:09,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 11] total 21 [2022-11-23 16:12:09,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866459339] [2022-11-23 16:12:09,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 16:12:09,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-23 16:12:09,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:12:09,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-23 16:12:09,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1615, Unknown=0, NotChecked=0, Total=1806 [2022-11-23 16:12:09,230 INFO L87 Difference]: Start difference. First operand 907 states and 1312 transitions. Second operand has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 1 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-23 16:12:22,521 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 [] [2022-11-23 16:12:25,109 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:12:29,373 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:12:32,958 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:12:34,972 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:12:38,299 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:12:40,306 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:12:42,323 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 [] [2022-11-23 16:12:42,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:12:42,324 INFO L93 Difference]: Finished difference Result 1825 states and 2655 transitions. [2022-11-23 16:12:42,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-23 16:12:42,329 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 1 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 62 [2022-11-23 16:12:42,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:12:42,333 INFO L225 Difference]: With dead ends: 1825 [2022-11-23 16:12:42,333 INFO L226 Difference]: Without dead ends: 928 [2022-11-23 16:12:42,336 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 146 SyntacticMatches, 8 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 21.3s TimeCoverageRelationStatistics Valid=359, Invalid=2191, Unknown=0, NotChecked=0, Total=2550 [2022-11-23 16:12:42,337 INFO L413 NwaCegarLoop]: 614 mSDtfsCounter, 0 mSDsluCounter, 6140 mSDsCounter, 0 mSdLazyCounter, 918 mSolverCounterSat, 120 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6754 SdHoareTripleChecker+Invalid, 1045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 918 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.2s IncrementalHoareTripleChecker+Time [2022-11-23 16:12:42,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6754 Invalid, 1045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 918 Invalid, 7 Unknown, 0 Unchecked, 29.2s Time] [2022-11-23 16:12:42,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 928 states. [2022-11-23 16:12:42,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 928 to 928. [2022-11-23 16:12:42,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 928 states, 711 states have (on average 1.3755274261603376) internal successors, (978), 717 states have internal predecessors, (978), 160 states have call successors, (160), 56 states have call predecessors, (160), 56 states have return successors, (195), 154 states have call predecessors, (195), 153 states have call successors, (195) [2022-11-23 16:12:42,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 1333 transitions. [2022-11-23 16:12:42,489 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 1333 transitions. Word has length 62 [2022-11-23 16:12:42,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:12:42,490 INFO L495 AbstractCegarLoop]: Abstraction has 928 states and 1333 transitions. [2022-11-23 16:12:42,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 1 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-23 16:12:42,490 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 1333 transitions. [2022-11-23 16:12:42,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-23 16:12:42,492 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:12:42,493 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:12:42,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbca4e56-a55d-43e4-95ff-f0e4470ba6e3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-23 16:12:42,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbca4e56-a55d-43e4-95ff-f0e4470ba6e3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-23 16:12:42,697 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:12:42,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:12:42,697 INFO L85 PathProgramCache]: Analyzing trace with hash -806452169, now seen corresponding path program 4 times [2022-11-23 16:12:42,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:12:42,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695050943] [2022-11-23 16:12:42,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:12:42,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:12:42,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:12:44,179 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2022-11-23 16:12:44,179 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:12:44,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695050943] [2022-11-23 16:12:44,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695050943] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:12:44,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952871114] [2022-11-23 16:12:44,180 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 16:12:44,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:12:44,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbca4e56-a55d-43e4-95ff-f0e4470ba6e3/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:12:44,182 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbca4e56-a55d-43e4-95ff-f0e4470ba6e3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:12:44,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbca4e56-a55d-43e4-95ff-f0e4470ba6e3/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-23 16:12:46,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:12:46,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 1379 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-23 16:12:46,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:12:46,771 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2022-11-23 16:12:46,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:12:47,031 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 387 trivial. 0 not checked. [2022-11-23 16:12:47,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952871114] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:12:47,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2110457348] [2022-11-23 16:12:47,035 INFO L159 IcfgInterpreter]: Started Sifa with 38 locations of interest [2022-11-23 16:12:47,035 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 16:12:47,035 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 16:12:47,036 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 16:12:47,036 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 16:12:47,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:12:47,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:12:47,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:12:47,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:12:47,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2022-11-23 16:12:47,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:12:47,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:12:47,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:12:47,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:12:47,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:12:47,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:12:47,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:12:47,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:12:47,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:12:47,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:12:47,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:12:47,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:12:47,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:12:47,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:12:47,558 INFO L217 Elim1Store]: Index analysis took 254 ms [2022-11-23 16:13:00,214 WARN L233 SmtUtils]: Spent 12.65s on a formula simplification. DAG size of input: 1002 DAG size of output: 453 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-23 16:13:00,216 INFO L321 Elim1Store]: treesize reduction 6523, result has 17.2 percent of original size [2022-11-23 16:13:00,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 37 select indices, 37 select index equivalence classes, 509 disjoint index pairs (out of 666 index pairs), introduced 37 new quantified variables, introduced 194 case distinctions, treesize of input 292 treesize of output 1537 [2022-11-23 16:13:00,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:13:00,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:13:00,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:13:00,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:13:00,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:13:00,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:13:00,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:13:00,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:13:00,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 31 select indices, 31 select index equivalence classes, 645 disjoint index pairs (out of 465 index pairs), introduced 31 new quantified variables, introduced 0 case distinctions, treesize of input 192 treesize of output 292 [2022-11-23 16:13:00,749 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 65 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2022-11-23 16:13:00,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:13:00,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:13:00,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 89 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 0 case distinctions, treesize of input 131 treesize of output 140 [2022-11-23 16:13:00,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:13:00,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 58 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 140 [2022-11-23 16:13:01,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:13:01,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:13:01,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:13:01,487 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 67 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 1236 treesize of output 548 [2022-11-23 16:13:01,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 58 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 153 [2022-11-23 16:13:01,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:13:01,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:13:01,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 100 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 104 [2022-11-23 16:13:04,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:13:04,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:13:04,463 INFO L321 Elim1Store]: treesize reduction 177, result has 13.7 percent of original size [2022-11-23 16:13:04,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 3975 treesize of output 2609 [2022-11-23 16:13:05,150 INFO L321 Elim1Store]: treesize reduction 950, result has 10.1 percent of original size [2022-11-23 16:13:05,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 24 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 27 case distinctions, treesize of input 3873 treesize of output 3841 [2022-11-23 16:13:05,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:13:05,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:13:05,487 INFO L321 Elim1Store]: treesize reduction 165, result has 14.5 percent of original size [2022-11-23 16:13:05,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 3938 treesize of output 3899 [2022-11-23 16:13:07,305 INFO L321 Elim1Store]: treesize reduction 42, result has 39.1 percent of original size [2022-11-23 16:13:07,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 135 treesize of output 113 [2022-11-23 16:13:07,353 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-23 16:13:07,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 76 [2022-11-23 16:13:07,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 16:13:07,599 INFO L321 Elim1Store]: treesize reduction 42, result has 39.1 percent of original size [2022-11-23 16:13:07,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 135 treesize of output 113 [2022-11-23 16:13:07,643 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-23 16:13:07,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 76 [2022-11-23 16:13:07,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 16:13:07,806 INFO L321 Elim1Store]: treesize reduction 42, result has 39.1 percent of original size [2022-11-23 16:13:07,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 135 treesize of output 113 [2022-11-23 16:13:07,862 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-23 16:13:07,862 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 76 [2022-11-23 16:13:07,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10