./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--x25_asy.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b 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_f8ea5647-c438-456b-8aa3-0807d89a8589/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8ea5647-c438-456b-8aa3-0807d89a8589/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8ea5647-c438-456b-8aa3-0807d89a8589/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8ea5647-c438-456b-8aa3-0807d89a8589/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--x25_asy.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8ea5647-c438-456b-8aa3-0807d89a8589/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8ea5647-c438-456b-8aa3-0807d89a8589/bin/utaipan-I9t0OCRTmS --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 64bit --witnessprinter.graph.data.programhash 1cccbd170603672b3f74a5336cc730c4afa341837cef68e5226707c3c82e670c --- 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-8393723 [2022-11-19 08:28:23,301 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 08:28:23,303 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 08:28:23,326 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 08:28:23,327 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 08:28:23,333 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 08:28:23,336 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 08:28:23,341 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 08:28:23,343 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 08:28:23,349 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 08:28:23,350 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 08:28:23,353 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 08:28:23,353 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 08:28:23,356 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 08:28:23,358 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 08:28:23,361 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 08:28:23,362 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 08:28:23,363 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 08:28:23,365 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 08:28:23,371 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 08:28:23,372 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 08:28:23,373 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 08:28:23,376 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 08:28:23,377 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 08:28:23,385 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 08:28:23,385 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 08:28:23,386 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 08:28:23,388 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 08:28:23,388 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 08:28:23,389 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 08:28:23,390 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 08:28:23,391 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 08:28:23,393 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 08:28:23,394 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 08:28:23,395 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 08:28:23,395 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 08:28:23,396 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 08:28:23,396 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 08:28:23,397 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 08:28:23,398 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 08:28:23,399 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 08:28:23,403 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8ea5647-c438-456b-8aa3-0807d89a8589/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-19 08:28:23,425 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 08:28:23,425 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 08:28:23,426 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 08:28:23,426 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 08:28:23,426 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 08:28:23,427 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 08:28:23,427 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 08:28:23,427 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 08:28:23,427 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 08:28:23,428 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 08:28:23,428 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 08:28:23,428 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 08:28:23,428 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 08:28:23,428 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 08:28:23,429 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 08:28:23,429 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 08:28:23,429 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 08:28:23,429 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 08:28:23,430 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 08:28:23,430 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 08:28:23,431 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 08:28:23,431 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 08:28:23,431 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 08:28:23,431 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 08:28:23,431 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 08:28:23,432 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 08:28:23,432 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 08:28:23,432 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 08:28:23,432 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 08:28:23,433 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:28:23,433 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 08:28:23,433 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 08:28:23,433 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 08:28:23,434 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 08:28:23,434 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 08:28:23,434 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 08:28:23,434 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 08:28:23,434 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 08:28:23,435 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_f8ea5647-c438-456b-8aa3-0807d89a8589/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8ea5647-c438-456b-8aa3-0807d89a8589/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1cccbd170603672b3f74a5336cc730c4afa341837cef68e5226707c3c82e670c [2022-11-19 08:28:23,741 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 08:28:23,780 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 08:28:23,783 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 08:28:23,785 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 08:28:23,786 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 08:28:23,787 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8ea5647-c438-456b-8aa3-0807d89a8589/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--x25_asy.ko-entry_point.cil.out.i [2022-11-19 08:28:23,869 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8ea5647-c438-456b-8aa3-0807d89a8589/bin/utaipan-I9t0OCRTmS/data/3d8fd5c90/85218ab6f0c843efb27833d1a3cebaef/FLAGbc1be4566 [2022-11-19 08:28:24,594 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 08:28:24,594 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8ea5647-c438-456b-8aa3-0807d89a8589/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--x25_asy.ko-entry_point.cil.out.i [2022-11-19 08:28:24,638 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8ea5647-c438-456b-8aa3-0807d89a8589/bin/utaipan-I9t0OCRTmS/data/3d8fd5c90/85218ab6f0c843efb27833d1a3cebaef/FLAGbc1be4566 [2022-11-19 08:28:24,720 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8ea5647-c438-456b-8aa3-0807d89a8589/bin/utaipan-I9t0OCRTmS/data/3d8fd5c90/85218ab6f0c843efb27833d1a3cebaef [2022-11-19 08:28:24,724 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 08:28:24,726 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 08:28:24,729 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 08:28:24,730 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 08:28:24,734 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 08:28:24,734 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:28:24" (1/1) ... [2022-11-19 08:28:24,737 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7959b646 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:28:24, skipping insertion in model container [2022-11-19 08:28:24,737 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:28:24" (1/1) ... [2022-11-19 08:28:24,745 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 08:28:24,877 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 08:28:25,766 WARN L234 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_f8ea5647-c438-456b-8aa3-0807d89a8589/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--x25_asy.ko-entry_point.cil.out.i[158694,158707] [2022-11-19 08:28:26,492 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:28:26,519 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 08:28:26,674 WARN L234 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_f8ea5647-c438-456b-8aa3-0807d89a8589/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--x25_asy.ko-entry_point.cil.out.i[158694,158707] [2022-11-19 08:28:26,828 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:28:26,915 INFO L208 MainTranslator]: Completed translation [2022-11-19 08:28:26,915 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:28:26 WrapperNode [2022-11-19 08:28:26,916 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 08:28:26,917 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 08:28:26,917 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 08:28:26,917 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 08:28:26,925 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:28:26" (1/1) ... [2022-11-19 08:28:27,002 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:28:26" (1/1) ... [2022-11-19 08:28:27,126 INFO L138 Inliner]: procedures = 181, calls = 601, calls flagged for inlining = 90, calls inlined = 85, statements flattened = 2007 [2022-11-19 08:28:27,126 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 08:28:27,127 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 08:28:27,127 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 08:28:27,127 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 08:28:27,137 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:28:26" (1/1) ... [2022-11-19 08:28:27,138 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:28:26" (1/1) ... [2022-11-19 08:28:27,148 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:28:26" (1/1) ... [2022-11-19 08:28:27,156 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:28:26" (1/1) ... [2022-11-19 08:28:27,252 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:28:26" (1/1) ... [2022-11-19 08:28:27,262 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:28:26" (1/1) ... [2022-11-19 08:28:27,272 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:28:26" (1/1) ... [2022-11-19 08:28:27,280 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:28:26" (1/1) ... [2022-11-19 08:28:27,309 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 08:28:27,316 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 08:28:27,316 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 08:28:27,316 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 08:28:27,318 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:28:26" (1/1) ... [2022-11-19 08:28:27,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:28:27,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8ea5647-c438-456b-8aa3-0807d89a8589/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:28:27,365 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8ea5647-c438-456b-8aa3-0807d89a8589/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 08:28:27,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8ea5647-c438-456b-8aa3-0807d89a8589/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 08:28:27,413 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dev_alloc_skb_14 [2022-11-19 08:28:27,414 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dev_alloc_skb_14 [2022-11-19 08:28:27,414 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-11-19 08:28:27,414 INFO L130 BoogieDeclarations]: Found specification of procedure __xchg_wrong_size [2022-11-19 08:28:27,414 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-11-19 08:28:27,414 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-19 08:28:27,414 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-19 08:28:27,415 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-19 08:28:27,415 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-19 08:28:27,415 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2022-11-19 08:28:27,415 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2022-11-19 08:28:27,415 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-11-19 08:28:27,415 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-11-19 08:28:27,416 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_free [2022-11-19 08:28:27,416 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_free [2022-11-19 08:28:27,416 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-19 08:28:27,416 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-19 08:28:27,416 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2022-11-19 08:28:27,416 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2022-11-19 08:28:27,417 INFO L130 BoogieDeclarations]: Found specification of procedure x25_asy_data_transmit [2022-11-19 08:28:27,417 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_asy_data_transmit [2022-11-19 08:28:27,417 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_alloc [2022-11-19 08:28:27,417 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_alloc [2022-11-19 08:28:27,417 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-11-19 08:28:27,417 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-11-19 08:28:27,418 INFO L130 BoogieDeclarations]: Found specification of procedure x25_asy_ioctl [2022-11-19 08:28:27,418 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_asy_ioctl [2022-11-19 08:28:27,418 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-19 08:28:27,418 INFO L130 BoogieDeclarations]: Found specification of procedure x25_asy_timeout [2022-11-19 08:28:27,419 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_asy_timeout [2022-11-19 08:28:27,419 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-19 08:28:27,419 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-19 08:28:27,419 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-19 08:28:27,419 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-19 08:28:27,419 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2022-11-19 08:28:27,421 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2022-11-19 08:28:27,421 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-19 08:28:27,421 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-19 08:28:27,421 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2022-11-19 08:28:27,421 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2022-11-19 08:28:27,422 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-19 08:28:27,422 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_set_bit [2022-11-19 08:28:27,422 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_set_bit [2022-11-19 08:28:27,422 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_free_int [2022-11-19 08:28:27,422 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_free_int [2022-11-19 08:28:27,423 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 08:28:27,423 INFO L130 BoogieDeclarations]: Found specification of procedure x25_asy_change_mtu [2022-11-19 08:28:27,423 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_asy_change_mtu [2022-11-19 08:28:27,424 INFO L130 BoogieDeclarations]: Found specification of procedure x25_type_trans [2022-11-19 08:28:27,424 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_type_trans [2022-11-19 08:28:27,427 INFO L130 BoogieDeclarations]: Found specification of procedure __kmalloc [2022-11-19 08:28:27,427 INFO L138 BoogieDeclarations]: Found implementation of procedure __kmalloc [2022-11-19 08:28:27,428 INFO L130 BoogieDeclarations]: Found specification of procedure x25_asy_unlock [2022-11-19 08:28:27,428 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_asy_unlock [2022-11-19 08:28:27,429 INFO L130 BoogieDeclarations]: Found specification of procedure x25_asy_compat_ioctl [2022-11-19 08:28:27,429 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_asy_compat_ioctl [2022-11-19 08:28:27,429 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-19 08:28:27,429 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-19 08:28:27,430 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_to_user [2022-11-19 08:28:27,430 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_to_user [2022-11-19 08:28:27,430 INFO L130 BoogieDeclarations]: Found specification of procedure x25_asy_data_indication [2022-11-19 08:28:27,430 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_asy_data_indication [2022-11-19 08:28:27,430 INFO L130 BoogieDeclarations]: Found specification of procedure netif_running [2022-11-19 08:28:27,430 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_running [2022-11-19 08:28:27,431 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-19 08:28:27,431 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_set_remove [2022-11-19 08:28:27,431 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_set_remove [2022-11-19 08:28:27,431 INFO L130 BoogieDeclarations]: Found specification of procedure x25_asy_disconnected [2022-11-19 08:28:27,431 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_asy_disconnected [2022-11-19 08:28:27,431 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~int~TO~int [2022-11-19 08:28:27,432 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~int~TO~int [2022-11-19 08:28:27,432 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 08:28:27,432 INFO L130 BoogieDeclarations]: Found specification of procedure netif_queue_stopped [2022-11-19 08:28:27,432 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_queue_stopped [2022-11-19 08:28:27,432 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-19 08:28:27,432 INFO L130 BoogieDeclarations]: Found specification of procedure skb_put [2022-11-19 08:28:27,433 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_put [2022-11-19 08:28:27,433 INFO L130 BoogieDeclarations]: Found specification of procedure x25_asy_connected [2022-11-19 08:28:27,433 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_asy_connected [2022-11-19 08:28:27,434 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2022-11-19 08:28:27,434 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2022-11-19 08:28:27,434 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2022-11-19 08:28:27,434 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2022-11-19 08:28:27,435 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2022-11-19 08:28:27,435 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2022-11-19 08:28:27,435 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2022-11-19 08:28:27,435 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2022-11-19 08:28:27,436 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2022-11-19 08:28:27,437 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2022-11-19 08:28:27,437 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2022-11-19 08:28:27,437 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2022-11-19 08:28:27,437 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 08:28:27,438 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_bh [2022-11-19 08:28:27,438 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_bh [2022-11-19 08:28:27,438 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_clear_bit [2022-11-19 08:28:27,439 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_clear_bit [2022-11-19 08:28:27,439 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-11-19 08:28:27,439 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2022-11-19 08:28:27,439 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2022-11-19 08:28:27,439 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 08:28:27,439 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 08:28:27,439 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_bh [2022-11-19 08:28:27,440 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_bh [2022-11-19 08:28:27,907 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 08:28:27,912 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 08:28:28,247 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-19 08:28:29,688 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 08:28:30,165 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 08:28:30,166 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-19 08:28:30,172 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:28:30 BoogieIcfgContainer [2022-11-19 08:28:30,173 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 08:28:30,181 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 08:28:30,181 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 08:28:30,185 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 08:28:30,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:28:24" (1/3) ... [2022-11-19 08:28:30,187 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48474969 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:28:30, skipping insertion in model container [2022-11-19 08:28:30,187 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:28:26" (2/3) ... [2022-11-19 08:28:30,189 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48474969 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:28:30, skipping insertion in model container [2022-11-19 08:28:30,189 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:28:30" (3/3) ... [2022-11-19 08:28:30,200 INFO L112 eAbstractionObserver]: Analyzing ICFG 205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--x25_asy.ko-entry_point.cil.out.i [2022-11-19 08:28:30,227 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 08:28:30,227 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 08:28:30,321 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 08:28:30,328 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;@1851bff9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 08:28:30,328 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 08:28:30,334 INFO L276 IsEmpty]: Start isEmpty. Operand has 555 states, 359 states have (on average 1.392757660167131) internal successors, (500), 375 states have internal predecessors, (500), 152 states have call successors, (152), 43 states have call predecessors, (152), 42 states have return successors, (147), 145 states have call predecessors, (147), 147 states have call successors, (147) [2022-11-19 08:28:30,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-19 08:28:30,349 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:28:30,350 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:28:30,350 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:28:30,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:28:30,356 INFO L85 PathProgramCache]: Analyzing trace with hash -818409730, now seen corresponding path program 1 times [2022-11-19 08:28:30,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:28:30,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509368357] [2022-11-19 08:28:30,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:28:30,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:28:30,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:28:30,886 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-19 08:28:30,886 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:28:30,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509368357] [2022-11-19 08:28:30,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509368357] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:28:30,888 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:28:30,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:28:30,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586110579] [2022-11-19 08:28:30,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:28:30,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:28:30,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:28:30,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:28:30,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:28:30,930 INFO L87 Difference]: Start difference. First operand has 555 states, 359 states have (on average 1.392757660167131) internal successors, (500), 375 states have internal predecessors, (500), 152 states have call successors, (152), 43 states have call predecessors, (152), 42 states have return successors, (147), 145 states have call predecessors, (147), 147 states have call successors, (147) Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-19 08:28:31,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:28:31,778 INFO L93 Difference]: Finished difference Result 1610 states and 2376 transitions. [2022-11-19 08:28:31,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:28:31,785 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 46 [2022-11-19 08:28:31,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:28:31,805 INFO L225 Difference]: With dead ends: 1610 [2022-11-19 08:28:31,806 INFO L226 Difference]: Without dead ends: 1052 [2022-11-19 08:28:31,815 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 [2022-11-19 08:28:31,818 INFO L413 NwaCegarLoop]: 829 mSDtfsCounter, 733 mSDsluCounter, 681 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 733 SdHoareTripleChecker+Valid, 1510 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:28:31,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [733 Valid, 1510 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 08:28:31,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1052 states. [2022-11-19 08:28:31,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1052 to 1052. [2022-11-19 08:28:31,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1052 states, 690 states have (on average 1.3695652173913044) internal successors, (945), 708 states have internal predecessors, (945), 279 states have call successors, (279), 83 states have call predecessors, (279), 82 states have return successors, (278), 274 states have call predecessors, (278), 278 states have call successors, (278) [2022-11-19 08:28:32,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1052 states to 1052 states and 1502 transitions. [2022-11-19 08:28:32,006 INFO L78 Accepts]: Start accepts. Automaton has 1052 states and 1502 transitions. Word has length 46 [2022-11-19 08:28:32,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:28:32,007 INFO L495 AbstractCegarLoop]: Abstraction has 1052 states and 1502 transitions. [2022-11-19 08:28:32,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-19 08:28:32,008 INFO L276 IsEmpty]: Start isEmpty. Operand 1052 states and 1502 transitions. [2022-11-19 08:28:32,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-19 08:28:32,012 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:28:32,012 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:28:32,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 08:28:32,013 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:28:32,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:28:32,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1003482438, now seen corresponding path program 1 times [2022-11-19 08:28:32,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:28:32,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950059563] [2022-11-19 08:28:32,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:28:32,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:28:32,081 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:28:32,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [456205975] [2022-11-19 08:28:32,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:28:32,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:28:32,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8ea5647-c438-456b-8aa3-0807d89a8589/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:28:32,087 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8ea5647-c438-456b-8aa3-0807d89a8589/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:28:32,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8ea5647-c438-456b-8aa3-0807d89a8589/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 08:28:32,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:28:32,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 878 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 08:28:32,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:28:32,714 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-19 08:28:32,715 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:28:32,715 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:28:32,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950059563] [2022-11-19 08:28:32,715 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:28:32,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456205975] [2022-11-19 08:28:32,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456205975] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:28:32,716 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:28:32,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:28:32,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923498253] [2022-11-19 08:28:32,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:28:32,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:28:32,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:28:32,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:28:32,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:28:32,719 INFO L87 Difference]: Start difference. First operand 1052 states and 1502 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-19 08:28:33,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:28:33,475 INFO L93 Difference]: Finished difference Result 2093 states and 3044 transitions. [2022-11-19 08:28:33,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:28:33,476 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 46 [2022-11-19 08:28:33,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:28:33,491 INFO L225 Difference]: With dead ends: 2093 [2022-11-19 08:28:33,491 INFO L226 Difference]: Without dead ends: 2075 [2022-11-19 08:28:33,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:28:33,495 INFO L413 NwaCegarLoop]: 873 mSDtfsCounter, 763 mSDsluCounter, 1564 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 763 SdHoareTripleChecker+Valid, 2437 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 08:28:33,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [763 Valid, 2437 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 08:28:33,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2075 states. [2022-11-19 08:28:33,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2075 to 2067. [2022-11-19 08:28:33,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2067 states, 1355 states have (on average 1.3712177121771219) internal successors, (1858), 1391 states have internal predecessors, (1858), 547 states have call successors, (547), 165 states have call predecessors, (547), 164 states have return successors, (602), 538 states have call predecessors, (602), 546 states have call successors, (602) [2022-11-19 08:28:33,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2067 states to 2067 states and 3007 transitions. [2022-11-19 08:28:33,629 INFO L78 Accepts]: Start accepts. Automaton has 2067 states and 3007 transitions. Word has length 46 [2022-11-19 08:28:33,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:28:33,630 INFO L495 AbstractCegarLoop]: Abstraction has 2067 states and 3007 transitions. [2022-11-19 08:28:33,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-19 08:28:33,630 INFO L276 IsEmpty]: Start isEmpty. Operand 2067 states and 3007 transitions. [2022-11-19 08:28:33,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-19 08:28:33,637 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:28:33,637 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:28:33,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8ea5647-c438-456b-8aa3-0807d89a8589/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 08:28:33,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8ea5647-c438-456b-8aa3-0807d89a8589/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:28:33,847 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:28:33,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:28:33,847 INFO L85 PathProgramCache]: Analyzing trace with hash 546088643, now seen corresponding path program 1 times [2022-11-19 08:28:33,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:28:33,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111111267] [2022-11-19 08:28:33,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:28:33,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:28:33,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:28:33,993 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:28:33,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111111267] [2022-11-19 08:28:33,999 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-19 08:28:33,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544270399] [2022-11-19 08:28:33,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:28:33,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:28:33,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8ea5647-c438-456b-8aa3-0807d89a8589/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:28:34,001 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8ea5647-c438-456b-8aa3-0807d89a8589/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:28:34,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8ea5647-c438-456b-8aa3-0807d89a8589/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 08:28:34,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:28:34,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 1021 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 08:28:34,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:28:34,591 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-19 08:28:34,592 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:28:34,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544270399] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:28:34,592 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:28:34,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:28:34,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425813682] [2022-11-19 08:28:34,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:28:34,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:28:34,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:28:34,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:28:34,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:28:34,602 INFO L87 Difference]: Start difference. First operand 2067 states and 3007 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-19 08:28:35,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:28:35,366 INFO L93 Difference]: Finished difference Result 5833 states and 8456 transitions. [2022-11-19 08:28:35,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:28:35,368 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 77 [2022-11-19 08:28:35,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:28:35,389 INFO L225 Difference]: With dead ends: 5833 [2022-11-19 08:28:35,389 INFO L226 Difference]: Without dead ends: 3777 [2022-11-19 08:28:35,398 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:28:35,399 INFO L413 NwaCegarLoop]: 786 mSDtfsCounter, 627 mSDsluCounter, 632 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 627 SdHoareTripleChecker+Valid, 1418 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:28:35,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [627 Valid, 1418 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 08:28:35,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3777 states. [2022-11-19 08:28:35,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3777 to 3771. [2022-11-19 08:28:35,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3771 states, 2512 states have (on average 1.3730095541401275) internal successors, (3449), 2573 states have internal predecessors, (3449), 946 states have call successors, (946), 313 states have call predecessors, (946), 312 states have return successors, (1021), 932 states have call predecessors, (1021), 945 states have call successors, (1021) [2022-11-19 08:28:35,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3771 states to 3771 states and 5416 transitions. [2022-11-19 08:28:35,642 INFO L78 Accepts]: Start accepts. Automaton has 3771 states and 5416 transitions. Word has length 77 [2022-11-19 08:28:35,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:28:35,642 INFO L495 AbstractCegarLoop]: Abstraction has 3771 states and 5416 transitions. [2022-11-19 08:28:35,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-19 08:28:35,643 INFO L276 IsEmpty]: Start isEmpty. Operand 3771 states and 5416 transitions. [2022-11-19 08:28:35,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-19 08:28:35,648 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:28:35,648 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:28:35,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8ea5647-c438-456b-8aa3-0807d89a8589/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 08:28:35,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8ea5647-c438-456b-8aa3-0807d89a8589/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:28:35,865 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:28:35,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:28:35,866 INFO L85 PathProgramCache]: Analyzing trace with hash -752541214, now seen corresponding path program 1 times [2022-11-19 08:28:35,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:28:35,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951385928] [2022-11-19 08:28:35,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:28:35,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:28:35,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:28:35,977 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:28:35,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951385928] [2022-11-19 08:28:35,977 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-19 08:28:35,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389032023] [2022-11-19 08:28:35,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:28:35,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:28:35,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8ea5647-c438-456b-8aa3-0807d89a8589/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:28:35,979 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8ea5647-c438-456b-8aa3-0807d89a8589/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:28:35,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8ea5647-c438-456b-8aa3-0807d89a8589/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 08:28:36,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:28:36,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 1092 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 08:28:36,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:28:36,498 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-19 08:28:36,498 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:28:36,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389032023] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:28:36,499 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:28:36,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:28:36,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98950749] [2022-11-19 08:28:36,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:28:36,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:28:36,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:28:36,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:28:36,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:28:36,503 INFO L87 Difference]: Start difference. First operand 3771 states and 5416 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-19 08:28:37,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:28:37,449 INFO L93 Difference]: Finished difference Result 10415 states and 14928 transitions. [2022-11-19 08:28:37,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:28:37,451 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 88 [2022-11-19 08:28:37,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:28:37,496 INFO L225 Difference]: With dead ends: 10415 [2022-11-19 08:28:37,496 INFO L226 Difference]: Without dead ends: 6655 [2022-11-19 08:28:37,513 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:28:37,515 INFO L413 NwaCegarLoop]: 786 mSDtfsCounter, 612 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 612 SdHoareTripleChecker+Valid, 1428 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:28:37,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [612 Valid, 1428 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 08:28:37,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6655 states. [2022-11-19 08:28:37,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6655 to 6639. [2022-11-19 08:28:37,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6639 states, 4516 states have (on average 1.3768821966341895) internal successors, (6218), 4629 states have internal predecessors, (6218), 1548 states have call successors, (1548), 575 states have call predecessors, (1548), 574 states have return successors, (1683), 1510 states have call predecessors, (1683), 1547 states have call successors, (1683) [2022-11-19 08:28:37,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6639 states to 6639 states and 9449 transitions. [2022-11-19 08:28:37,973 INFO L78 Accepts]: Start accepts. Automaton has 6639 states and 9449 transitions. Word has length 88 [2022-11-19 08:28:37,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:28:37,973 INFO L495 AbstractCegarLoop]: Abstraction has 6639 states and 9449 transitions. [2022-11-19 08:28:37,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-19 08:28:37,973 INFO L276 IsEmpty]: Start isEmpty. Operand 6639 states and 9449 transitions. [2022-11-19 08:28:37,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-19 08:28:37,981 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:28:37,981 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:28:37,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8ea5647-c438-456b-8aa3-0807d89a8589/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 08:28:38,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8ea5647-c438-456b-8aa3-0807d89a8589/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:28:38,189 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:28:38,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:28:38,190 INFO L85 PathProgramCache]: Analyzing trace with hash -267203436, now seen corresponding path program 1 times [2022-11-19 08:28:38,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:28:38,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867285968] [2022-11-19 08:28:38,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:28:38,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:28:38,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:28:38,307 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:28:38,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867285968] [2022-11-19 08:28:38,311 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-19 08:28:38,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249312664] [2022-11-19 08:28:38,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:28:38,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:28:38,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8ea5647-c438-456b-8aa3-0807d89a8589/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:28:38,313 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8ea5647-c438-456b-8aa3-0807d89a8589/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:28:38,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8ea5647-c438-456b-8aa3-0807d89a8589/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 08:28:38,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:28:38,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 1228 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 08:28:38,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:28:38,832 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-19 08:28:38,832 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:28:38,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249312664] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:28:38,833 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:28:38,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:28:38,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577377001] [2022-11-19 08:28:38,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:28:38,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:28:38,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:28:38,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:28:38,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:28:38,835 INFO L87 Difference]: Start difference. First operand 6639 states and 9449 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-19 08:28:39,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:28:39,776 INFO L93 Difference]: Finished difference Result 17063 states and 24236 transitions. [2022-11-19 08:28:39,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:28:39,780 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 101 [2022-11-19 08:28:39,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:28:39,852 INFO L225 Difference]: With dead ends: 17063 [2022-11-19 08:28:39,852 INFO L226 Difference]: Without dead ends: 10435 [2022-11-19 08:28:39,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:28:39,884 INFO L413 NwaCegarLoop]: 931 mSDtfsCounter, 538 mSDsluCounter, 646 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 538 SdHoareTripleChecker+Valid, 1577 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:28:39,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [538 Valid, 1577 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 08:28:39,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10435 states. [2022-11-19 08:28:40,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10435 to 10422. [2022-11-19 08:28:40,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10422 states, 7157 states have (on average 1.3667737878999582) internal successors, (9782), 7331 states have internal predecessors, (9782), 2322 states have call successors, (2322), 943 states have call predecessors, (2322), 942 states have return successors, (2559), 2267 states have call predecessors, (2559), 2321 states have call successors, (2559) [2022-11-19 08:28:40,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10422 states to 10422 states and 14663 transitions. [2022-11-19 08:28:40,486 INFO L78 Accepts]: Start accepts. Automaton has 10422 states and 14663 transitions. Word has length 101 [2022-11-19 08:28:40,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:28:40,487 INFO L495 AbstractCegarLoop]: Abstraction has 10422 states and 14663 transitions. [2022-11-19 08:28:40,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-19 08:28:40,488 INFO L276 IsEmpty]: Start isEmpty. Operand 10422 states and 14663 transitions. [2022-11-19 08:28:40,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-11-19 08:28:40,497 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:28:40,497 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:28:40,512 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8ea5647-c438-456b-8aa3-0807d89a8589/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 08:28:40,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8ea5647-c438-456b-8aa3-0807d89a8589/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:28:40,713 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:28:40,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:28:40,714 INFO L85 PathProgramCache]: Analyzing trace with hash 713149012, now seen corresponding path program 1 times [2022-11-19 08:28:40,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:28:40,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225954647] [2022-11-19 08:28:40,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:28:40,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:28:40,763 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:28:40,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [397587981] [2022-11-19 08:28:40,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:28:40,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:28:40,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8ea5647-c438-456b-8aa3-0807d89a8589/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:28:40,765 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8ea5647-c438-456b-8aa3-0807d89a8589/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:28:40,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8ea5647-c438-456b-8aa3-0807d89a8589/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 08:28:41,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:28:41,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 1167 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 08:28:41,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:28:41,443 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-11-19 08:28:41,443 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:28:41,444 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:28:41,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225954647] [2022-11-19 08:28:41,444 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:28:41,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397587981] [2022-11-19 08:28:41,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397587981] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:28:41,444 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:28:41,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:28:41,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299713205] [2022-11-19 08:28:41,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:28:41,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:28:41,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:28:41,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:28:41,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:28:41,446 INFO L87 Difference]: Start difference. First operand 10422 states and 14663 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-19 08:28:42,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:28:42,984 INFO L93 Difference]: Finished difference Result 30836 states and 43263 transitions. [2022-11-19 08:28:42,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:28:42,985 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 106 [2022-11-19 08:28:42,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:28:43,087 INFO L225 Difference]: With dead ends: 30836 [2022-11-19 08:28:43,087 INFO L226 Difference]: Without dead ends: 20433 [2022-11-19 08:28:43,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:28:43,126 INFO L413 NwaCegarLoop]: 791 mSDtfsCounter, 724 mSDsluCounter, 615 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 724 SdHoareTripleChecker+Valid, 1406 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 08:28:43,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [724 Valid, 1406 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 08:28:43,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20433 states. [2022-11-19 08:28:43,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20433 to 16183. [2022-11-19 08:28:43,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16183 states, 11063 states have (on average 1.3618367531411009) internal successors, (15066), 11350 states have internal predecessors, (15066), 3611 states have call successors, (3611), 1509 states have call predecessors, (3611), 1508 states have return successors, (3956), 3523 states have call predecessors, (3956), 3610 states have call successors, (3956) [2022-11-19 08:28:44,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16183 states to 16183 states and 22633 transitions. [2022-11-19 08:28:44,063 INFO L78 Accepts]: Start accepts. Automaton has 16183 states and 22633 transitions. Word has length 106 [2022-11-19 08:28:44,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:28:44,064 INFO L495 AbstractCegarLoop]: Abstraction has 16183 states and 22633 transitions. [2022-11-19 08:28:44,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-19 08:28:44,065 INFO L276 IsEmpty]: Start isEmpty. Operand 16183 states and 22633 transitions. [2022-11-19 08:28:44,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-11-19 08:28:44,077 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:28:44,078 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:28:44,093 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8ea5647-c438-456b-8aa3-0807d89a8589/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 08:28:44,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8ea5647-c438-456b-8aa3-0807d89a8589/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:28:44,287 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:28:44,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:28:44,288 INFO L85 PathProgramCache]: Analyzing trace with hash 2063998002, now seen corresponding path program 1 times [2022-11-19 08:28:44,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:28:44,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798817713] [2022-11-19 08:28:44,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:28:44,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:28:44,329 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:28:44,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1881873989] [2022-11-19 08:28:44,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:28:44,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:28:44,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8ea5647-c438-456b-8aa3-0807d89a8589/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:28:44,332 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8ea5647-c438-456b-8aa3-0807d89a8589/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:28:44,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8ea5647-c438-456b-8aa3-0807d89a8589/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 08:28:44,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:28:44,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 1167 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 08:28:44,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:28:44,929 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-11-19 08:28:44,929 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:28:44,929 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:28:44,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798817713] [2022-11-19 08:28:44,930 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:28:44,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881873989] [2022-11-19 08:28:44,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881873989] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:28:44,930 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:28:44,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:28:44,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888061869] [2022-11-19 08:28:44,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:28:44,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:28:44,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:28:44,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:28:44,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:28:44,939 INFO L87 Difference]: Start difference. First operand 16183 states and 22633 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-19 08:28:45,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:28:45,939 INFO L93 Difference]: Finished difference Result 24481 states and 34660 transitions. [2022-11-19 08:28:45,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:28:45,939 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 106 [2022-11-19 08:28:45,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:28:46,022 INFO L225 Difference]: With dead ends: 24481 [2022-11-19 08:28:46,023 INFO L226 Difference]: Without dead ends: 16271 [2022-11-19 08:28:46,059 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:28:46,060 INFO L413 NwaCegarLoop]: 681 mSDtfsCounter, 4 mSDsluCounter, 675 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 1356 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:28:46,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 1356 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 08:28:46,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16271 states. [2022-11-19 08:28:47,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16271 to 16271. [2022-11-19 08:28:47,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16271 states, 11129 states have (on average 1.359690897654776) internal successors, (15132), 11438 states have internal predecessors, (15132), 3611 states have call successors, (3611), 1509 states have call predecessors, (3611), 1530 states have return successors, (3998), 3523 states have call predecessors, (3998), 3610 states have call successors, (3998) [2022-11-19 08:28:47,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16271 states to 16271 states and 22741 transitions. [2022-11-19 08:28:47,224 INFO L78 Accepts]: Start accepts. Automaton has 16271 states and 22741 transitions. Word has length 106 [2022-11-19 08:28:47,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:28:47,226 INFO L495 AbstractCegarLoop]: Abstraction has 16271 states and 22741 transitions. [2022-11-19 08:28:47,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-19 08:28:47,227 INFO L276 IsEmpty]: Start isEmpty. Operand 16271 states and 22741 transitions. [2022-11-19 08:28:47,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-11-19 08:28:47,243 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:28:47,243 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:28:47,259 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8ea5647-c438-456b-8aa3-0807d89a8589/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-19 08:28:47,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8ea5647-c438-456b-8aa3-0807d89a8589/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-19 08:28:47,453 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:28:47,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:28:47,453 INFO L85 PathProgramCache]: Analyzing trace with hash -150432000, now seen corresponding path program 1 times [2022-11-19 08:28:47,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:28:47,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555628828] [2022-11-19 08:28:47,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:28:47,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:28:47,503 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:28:47,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1246230028] [2022-11-19 08:28:47,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:28:47,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:28:47,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8ea5647-c438-456b-8aa3-0807d89a8589/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:28:47,505 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8ea5647-c438-456b-8aa3-0807d89a8589/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:28:47,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8ea5647-c438-456b-8aa3-0807d89a8589/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 08:28:47,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:28:47,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 1175 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 08:28:47,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:28:48,143 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-19 08:28:48,144 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:28:48,144 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:28:48,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555628828] [2022-11-19 08:28:48,144 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:28:48,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246230028] [2022-11-19 08:28:48,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246230028] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:28:48,145 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:28:48,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 08:28:48,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328208267] [2022-11-19 08:28:48,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:28:48,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 08:28:48,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:28:48,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 08:28:48,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:28:48,150 INFO L87 Difference]: Start difference. First operand 16271 states and 22741 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 4 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-11-19 08:28:52,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:28:52,273 INFO L93 Difference]: Finished difference Result 33305 states and 46934 transitions. [2022-11-19 08:28:52,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 08:28:52,273 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 4 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 107 [2022-11-19 08:28:52,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:28:52,342 INFO L225 Difference]: With dead ends: 33305 [2022-11-19 08:28:52,342 INFO L226 Difference]: Without dead ends: 17053 [2022-11-19 08:28:52,382 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-19 08:28:52,383 INFO L413 NwaCegarLoop]: 568 mSDtfsCounter, 877 mSDsluCounter, 1435 mSDsCounter, 0 mSdLazyCounter, 2336 mSolverCounterSat, 467 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 987 SdHoareTripleChecker+Valid, 2003 SdHoareTripleChecker+Invalid, 2803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 467 IncrementalHoareTripleChecker+Valid, 2336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:28:52,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [987 Valid, 2003 Invalid, 2803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [467 Valid, 2336 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-11-19 08:28:52,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17053 states. [2022-11-19 08:28:53,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17053 to 16603. [2022-11-19 08:28:53,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16603 states, 11315 states have (on average 1.3507733097657977) internal successors, (15284), 11622 states have internal predecessors, (15284), 3707 states have call successors, (3707), 1509 states have call predecessors, (3707), 1580 states have return successors, (3946), 3671 states have call predecessors, (3946), 3706 states have call successors, (3946) [2022-11-19 08:28:53,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16603 states to 16603 states and 22937 transitions. [2022-11-19 08:28:53,283 INFO L78 Accepts]: Start accepts. Automaton has 16603 states and 22937 transitions. Word has length 107 [2022-11-19 08:28:53,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:28:53,283 INFO L495 AbstractCegarLoop]: Abstraction has 16603 states and 22937 transitions. [2022-11-19 08:28:53,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 4 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-11-19 08:28:53,284 INFO L276 IsEmpty]: Start isEmpty. Operand 16603 states and 22937 transitions. [2022-11-19 08:28:53,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-19 08:28:53,298 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:28:53,298 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:28:53,306 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8ea5647-c438-456b-8aa3-0807d89a8589/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-19 08:28:53,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8ea5647-c438-456b-8aa3-0807d89a8589/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:28:53,507 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:28:53,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:28:53,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1965190999, now seen corresponding path program 1 times [2022-11-19 08:28:53,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:28:53,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977216483] [2022-11-19 08:28:53,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:28:53,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:28:53,547 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:28:53,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1480804659] [2022-11-19 08:28:53,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:28:53,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:28:53,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8ea5647-c438-456b-8aa3-0807d89a8589/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:28:53,549 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8ea5647-c438-456b-8aa3-0807d89a8589/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:28:53,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8ea5647-c438-456b-8aa3-0807d89a8589/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-19 08:28:54,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:28:54,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 1230 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 08:28:54,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:28:54,277 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-11-19 08:28:54,278 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:28:54,278 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:28:54,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977216483] [2022-11-19 08:28:54,278 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:28:54,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480804659] [2022-11-19 08:28:54,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480804659] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:28:54,279 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:28:54,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:28:54,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23540135] [2022-11-19 08:28:54,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:28:54,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:28:54,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:28:54,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:28:54,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:28:54,281 INFO L87 Difference]: Start difference. First operand 16603 states and 22937 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 3 states have internal predecessors, (57), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-19 08:28:55,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:28:55,935 INFO L93 Difference]: Finished difference Result 16753 states and 23152 transitions. [2022-11-19 08:28:55,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:28:55,936 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 3 states have internal predecessors, (57), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 116 [2022-11-19 08:28:55,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:28:56,020 INFO L225 Difference]: With dead ends: 16753 [2022-11-19 08:28:56,020 INFO L226 Difference]: Without dead ends: 16717 [2022-11-19 08:28:56,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:28:56,031 INFO L413 NwaCegarLoop]: 677 mSDtfsCounter, 713 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 717 SdHoareTripleChecker+Valid, 1060 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-19 08:28:56,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [717 Valid, 1060 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 505 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-19 08:28:56,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16717 states. [2022-11-19 08:28:57,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16717 to 16615. [2022-11-19 08:28:57,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16615 states, 11327 states have (on average 1.3504016950648892) internal successors, (15296), 11634 states have internal predecessors, (15296), 3707 states have call successors, (3707), 1509 states have call predecessors, (3707), 1580 states have return successors, (3946), 3671 states have call predecessors, (3946), 3706 states have call successors, (3946) [2022-11-19 08:28:57,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16615 states to 16615 states and 22949 transitions. [2022-11-19 08:28:57,152 INFO L78 Accepts]: Start accepts. Automaton has 16615 states and 22949 transitions. Word has length 116 [2022-11-19 08:28:57,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:28:57,153 INFO L495 AbstractCegarLoop]: Abstraction has 16615 states and 22949 transitions. [2022-11-19 08:28:57,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 3 states have internal predecessors, (57), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-19 08:28:57,153 INFO L276 IsEmpty]: Start isEmpty. Operand 16615 states and 22949 transitions. [2022-11-19 08:28:57,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-19 08:28:57,165 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:28:57,165 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:28:57,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8ea5647-c438-456b-8aa3-0807d89a8589/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-19 08:28:57,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8ea5647-c438-456b-8aa3-0807d89a8589/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:28:57,373 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:28:57,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:28:57,373 INFO L85 PathProgramCache]: Analyzing trace with hash -136955271, now seen corresponding path program 1 times [2022-11-19 08:28:57,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:28:57,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193712966] [2022-11-19 08:28:57,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:28:57,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:28:57,421 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:28:57,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1295088811] [2022-11-19 08:28:57,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:28:57,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:28:57,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8ea5647-c438-456b-8aa3-0807d89a8589/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:28:57,424 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8ea5647-c438-456b-8aa3-0807d89a8589/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:28:57,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8ea5647-c438-456b-8aa3-0807d89a8589/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-19 08:28:57,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:28:57,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 1255 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 08:28:57,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:28:58,031 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 94 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-19 08:28:58,031 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:28:58,032 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:28:58,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193712966] [2022-11-19 08:28:58,032 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:28:58,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295088811] [2022-11-19 08:28:58,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295088811] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:28:58,032 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:28:58,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:28:58,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963897120] [2022-11-19 08:28:58,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:28:58,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:28:58,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:28:58,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:28:58,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:28:58,034 INFO L87 Difference]: Start difference. First operand 16615 states and 22949 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-19 08:28:58,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:28:58,785 INFO L93 Difference]: Finished difference Result 24975 states and 34511 transitions. [2022-11-19 08:28:58,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:28:58,786 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 113 [2022-11-19 08:28:58,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:28:58,824 INFO L225 Difference]: With dead ends: 24975 [2022-11-19 08:28:58,824 INFO L226 Difference]: Without dead ends: 8071 [2022-11-19 08:28:58,867 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:28:58,868 INFO L413 NwaCegarLoop]: 788 mSDtfsCounter, 697 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 697 SdHoareTripleChecker+Valid, 921 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:28:58,869 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [697 Valid, 921 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:28:58,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8071 states. [2022-11-19 08:28:59,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8071 to 8071. [2022-11-19 08:28:59,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8071 states, 5486 states have (on average 1.344331024425811) internal successors, (7375), 5642 states have internal predecessors, (7375), 1812 states have call successors, (1812), 737 states have call predecessors, (1812), 772 states have return successors, (1931), 1788 states have call predecessors, (1931), 1811 states have call successors, (1931) [2022-11-19 08:28:59,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8071 states to 8071 states and 11118 transitions. [2022-11-19 08:28:59,542 INFO L78 Accepts]: Start accepts. Automaton has 8071 states and 11118 transitions. Word has length 113 [2022-11-19 08:28:59,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:28:59,543 INFO L495 AbstractCegarLoop]: Abstraction has 8071 states and 11118 transitions. [2022-11-19 08:28:59,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-19 08:28:59,543 INFO L276 IsEmpty]: Start isEmpty. Operand 8071 states and 11118 transitions. [2022-11-19 08:28:59,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-11-19 08:28:59,553 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:28:59,553 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:28:59,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8ea5647-c438-456b-8aa3-0807d89a8589/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-19 08:28:59,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8ea5647-c438-456b-8aa3-0807d89a8589/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:28:59,762 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:28:59,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:28:59,763 INFO L85 PathProgramCache]: Analyzing trace with hash 676505891, now seen corresponding path program 1 times [2022-11-19 08:28:59,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:28:59,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994518444] [2022-11-19 08:28:59,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:28:59,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:28:59,803 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:28:59,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2074838516] [2022-11-19 08:28:59,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:28:59,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:28:59,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8ea5647-c438-456b-8aa3-0807d89a8589/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:28:59,804 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8ea5647-c438-456b-8aa3-0807d89a8589/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:28:59,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8ea5647-c438-456b-8aa3-0807d89a8589/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-19 08:29:00,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:29:00,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 1243 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-19 08:29:00,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:29:00,557 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-11-19 08:29:00,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:29:00,729 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-11-19 08:29:00,729 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:29:00,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994518444] [2022-11-19 08:29:00,729 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:29:00,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074838516] [2022-11-19 08:29:00,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074838516] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:29:00,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [909490414] [2022-11-19 08:29:00,771 INFO L159 IcfgInterpreter]: Started Sifa with 81 locations of interest [2022-11-19 08:29:00,771 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:29:00,775 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:29:00,781 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:29:00,781 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:29:01,756 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 7 treesize of output 6 [2022-11-19 08:29:01,889 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 7 treesize of output 6 [2022-11-19 08:29:03,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:29:03,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:29:03,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:29:03,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 19 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 34 [2022-11-19 08:29:04,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:29:04,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:29:04,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:29:04,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 19 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 34 [2022-11-19 08:29:25,369 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_zalloc with input of size 82 for LOIs [2022-11-19 08:29:25,388 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:29:42,571 WARN L233 SmtUtils]: Spent 6.05s on a formula simplification. DAG size of input: 638 DAG size of output: 636 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:29:48,970 WARN L233 SmtUtils]: Spent 6.19s on a formula simplification. DAG size of input: 650 DAG size of output: 648 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:29:55,538 WARN L233 SmtUtils]: Spent 6.32s on a formula simplification. DAG size of input: 661 DAG size of output: 652 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:30:02,272 WARN L233 SmtUtils]: Spent 6.49s on a formula simplification. DAG size of input: 671 DAG size of output: 662 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:30:09,298 WARN L233 SmtUtils]: Spent 6.75s on a formula simplification. DAG size of input: 679 DAG size of output: 666 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:30:17,277 WARN L233 SmtUtils]: Spent 7.62s on a formula simplification. DAG size of input: 713 DAG size of output: 700 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:30:25,509 WARN L233 SmtUtils]: Spent 7.88s on a formula simplification. DAG size of input: 736 DAG size of output: 705 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:30:34,069 WARN L233 SmtUtils]: Spent 8.28s on a formula simplification. DAG size of input: 748 DAG size of output: 717 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:30:43,114 WARN L233 SmtUtils]: Spent 8.71s on a formula simplification. DAG size of input: 759 DAG size of output: 728 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:30:52,028 WARN L233 SmtUtils]: Spent 8.55s on a formula simplification. DAG size of input: 761 DAG size of output: 730 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:31:00,731 WARN L233 SmtUtils]: Spent 8.33s on a formula simplification. DAG size of input: 751 DAG size of output: 720 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:31:09,762 WARN L233 SmtUtils]: Spent 8.65s on a formula simplification. DAG size of input: 762 DAG size of output: 731 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:31:18,974 WARN L233 SmtUtils]: Spent 8.80s on a formula simplification. DAG size of input: 764 DAG size of output: 733 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:31:27,868 WARN L233 SmtUtils]: Spent 8.47s on a formula simplification. DAG size of input: 754 DAG size of output: 723 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:31:37,344 WARN L233 SmtUtils]: Spent 8.99s on a formula simplification. DAG size of input: 785 DAG size of output: 746 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:31:46,458 WARN L233 SmtUtils]: Spent 8.69s on a formula simplification. DAG size of input: 764 DAG size of output: 733 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:31:55,346 WARN L233 SmtUtils]: Spent 8.44s on a formula simplification. DAG size of input: 752 DAG size of output: 721 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:32:04,274 WARN L233 SmtUtils]: Spent 8.43s on a formula simplification. DAG size of input: 754 DAG size of output: 723 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:32:04,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [909490414] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:32:04,280 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:32:04,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [4, 5] total 32 [2022-11-19 08:32:04,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438558581] [2022-11-19 08:32:04,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:32:04,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-19 08:32:04,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:32:04,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-19 08:32:04,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=827, Unknown=0, NotChecked=0, Total=992 [2022-11-19 08:32:04,283 INFO L87 Difference]: Start difference. First operand 8071 states and 11118 transitions. Second operand has 26 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 19 states have internal predecessors, (62), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2022-11-19 08:32:13,684 WARN L233 SmtUtils]: Spent 9.12s on a formula simplification. DAG size of input: 801 DAG size of output: 800 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:32:23,154 WARN L233 SmtUtils]: Spent 9.26s on a formula simplification. DAG size of input: 809 DAG size of output: 808 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:32:32,791 WARN L233 SmtUtils]: Spent 9.42s on a formula simplification. DAG size of input: 815 DAG size of output: 814 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:33:04,153 WARN L233 SmtUtils]: Spent 5.11s on a formula simplification that was a NOOP. DAG size: 842 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:33:09,963 WARN L233 SmtUtils]: Spent 5.13s on a formula simplification that was a NOOP. DAG size: 846 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:33:16,060 WARN L233 SmtUtils]: Spent 5.67s on a formula simplification that was a NOOP. DAG size: 880 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:33:22,894 WARN L233 SmtUtils]: Spent 5.83s on a formula simplification that was a NOOP. DAG size: 885 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:33:50,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:33:50,090 INFO L93 Difference]: Finished difference Result 16175 states and 22299 transitions. [2022-11-19 08:33:50,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-19 08:33:50,091 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 19 states have internal predecessors, (62), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) Word has length 121 [2022-11-19 08:33:50,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:33:50,119 INFO L225 Difference]: With dead ends: 16175 [2022-11-19 08:33:50,120 INFO L226 Difference]: Without dead ends: 8123 [2022-11-19 08:33:50,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 233.8s TimeCoverageRelationStatistics Valid=275, Invalid=1617, Unknown=0, NotChecked=0, Total=1892 [2022-11-19 08:33:50,136 INFO L413 NwaCegarLoop]: 683 mSDtfsCounter, 74 mSDsluCounter, 6150 mSDsCounter, 0 mSdLazyCounter, 3832 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 6833 SdHoareTripleChecker+Invalid, 3899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 3832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:33:50,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 6833 Invalid, 3899 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [67 Valid, 3832 Invalid, 0 Unknown, 0 Unchecked, 30.2s Time] [2022-11-19 08:33:50,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8123 states. [2022-11-19 08:33:50,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8123 to 8100. [2022-11-19 08:33:50,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8100 states, 5510 states have (on average 1.3439201451905627) internal successors, (7405), 5666 states have internal predecessors, (7405), 1816 states have call successors, (1816), 737 states have call predecessors, (1816), 773 states have return successors, (1944), 1793 states have call predecessors, (1944), 1815 states have call successors, (1944) [2022-11-19 08:33:50,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8100 states to 8100 states and 11165 transitions. [2022-11-19 08:33:50,659 INFO L78 Accepts]: Start accepts. Automaton has 8100 states and 11165 transitions. Word has length 121 [2022-11-19 08:33:50,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:33:50,660 INFO L495 AbstractCegarLoop]: Abstraction has 8100 states and 11165 transitions. [2022-11-19 08:33:50,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 19 states have internal predecessors, (62), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2022-11-19 08:33:50,660 INFO L276 IsEmpty]: Start isEmpty. Operand 8100 states and 11165 transitions. [2022-11-19 08:33:50,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-19 08:33:50,670 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:33:50,671 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:33:50,681 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8ea5647-c438-456b-8aa3-0807d89a8589/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-19 08:33:50,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8ea5647-c438-456b-8aa3-0807d89a8589/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-19 08:33:50,879 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:33:50,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:33:50,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1511247393, now seen corresponding path program 1 times [2022-11-19 08:33:50,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:33:50,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71700431] [2022-11-19 08:33:50,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:33:50,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:33:50,941 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:33:50,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1827740440] [2022-11-19 08:33:50,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:33:50,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:33:50,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8ea5647-c438-456b-8aa3-0807d89a8589/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:33:50,954 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8ea5647-c438-456b-8aa3-0807d89a8589/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:33:50,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8ea5647-c438-456b-8aa3-0807d89a8589/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-19 08:33:51,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:33:51,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 1284 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-19 08:33:51,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:33:51,672 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-11-19 08:33:51,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:33:51,814 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-11-19 08:33:51,814 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:33:51,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71700431] [2022-11-19 08:33:51,815 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:33:51,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827740440] [2022-11-19 08:33:51,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827740440] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:33:51,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1495845881] [2022-11-19 08:33:51,819 INFO L159 IcfgInterpreter]: Started Sifa with 85 locations of interest [2022-11-19 08:33:51,819 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:33:51,819 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:33:51,820 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:33:51,820 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:33:52,410 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 7 treesize of output 6 [2022-11-19 08:33:52,611 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 7 treesize of output 6 [2022-11-19 08:33:53,003 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 [2022-11-19 08:33:53,010 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 8 treesize of output 7 [2022-11-19 08:33:53,018 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 7 treesize of output 6 [2022-11-19 08:33:53,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:33:53,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:33:53,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:33:53,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 19 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 34 [2022-11-19 08:33:54,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:33:54,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:33:54,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:33:54,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 19 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 34 [2022-11-19 08:33:57,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-19 08:33:57,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-19 08:33:57,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-19 08:33:58,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-19 08:33:58,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-19 08:33:58,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-19 08:34:03,371 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_zalloc with input of size 154 for LOIs [2022-11-19 08:34:03,544 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 8 treesize of output 7 [2022-11-19 08:34:03,563 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 [2022-11-19 08:34:03,641 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 7 treesize of output 6 [2022-11-19 08:34:05,005 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 182 for LOIs [2022-11-19 08:34:05,183 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:34:36,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1495845881] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:34:36,344 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:34:36,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [4, 5] total 36 [2022-11-19 08:34:36,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354088004] [2022-11-19 08:34:36,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:34:36,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-19 08:34:36,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:34:36,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-19 08:34:36,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1088, Unknown=0, NotChecked=0, Total=1260 [2022-11-19 08:34:36,346 INFO L87 Difference]: Start difference. First operand 8100 states and 11165 transitions. Second operand has 30 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 21 states have internal predecessors, (65), 7 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 7 states have call predecessors, (15), 7 states have call successors, (15) [2022-11-19 08:34:47,126 WARN L233 SmtUtils]: Spent 10.50s on a formula simplification. DAG size of input: 851 DAG size of output: 809 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:34:58,022 WARN L233 SmtUtils]: Spent 10.64s on a formula simplification. DAG size of input: 859 DAG size of output: 817 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:35:09,079 WARN L233 SmtUtils]: Spent 10.81s on a formula simplification. DAG size of input: 864 DAG size of output: 820 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:35:21,297 WARN L233 SmtUtils]: Spent 11.93s on a formula simplification. DAG size of input: 887 DAG size of output: 843 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:35:31,183 WARN L233 SmtUtils]: Spent 9.65s on a formula simplification. DAG size of input: 823 DAG size of output: 822 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:35:41,721 WARN L233 SmtUtils]: Spent 10.29s on a formula simplification. DAG size of input: 833 DAG size of output: 806 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:35:51,251 WARN L233 SmtUtils]: Spent 9.33s on a formula simplification. DAG size of input: 810 DAG size of output: 809 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:36:03,550 WARN L233 SmtUtils]: Spent 9.53s on a formula simplification. DAG size of input: 814 DAG size of output: 812 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:36:13,448 WARN L233 SmtUtils]: Spent 9.69s on a formula simplification. DAG size of input: 827 DAG size of output: 825 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:36:24,530 WARN L233 SmtUtils]: Spent 9.82s on a formula simplification. DAG size of input: 834 DAG size of output: 827 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:36:34,820 WARN L233 SmtUtils]: Spent 10.05s on a formula simplification. DAG size of input: 845 DAG size of output: 838 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:36:49,370 WARN L233 SmtUtils]: Spent 11.78s on a formula simplification. DAG size of input: 867 DAG size of output: 860 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:37:03,331 WARN L233 SmtUtils]: Spent 13.67s on a formula simplification. DAG size of input: 965 DAG size of output: 906 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:37:19,762 WARN L233 SmtUtils]: Spent 12.55s on a formula simplification. DAG size of input: 918 DAG size of output: 890 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:37:26,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:37:26,832 INFO L93 Difference]: Finished difference Result 16187 states and 22306 transitions. [2022-11-19 08:37:26,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-19 08:37:26,833 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 21 states have internal predecessors, (65), 7 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 7 states have call predecessors, (15), 7 states have call successors, (15) Word has length 125 [2022-11-19 08:37:26,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:37:26,864 INFO L225 Difference]: With dead ends: 16187 [2022-11-19 08:37:26,864 INFO L226 Difference]: Without dead ends: 8135 [2022-11-19 08:37:26,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 339 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 916 ImplicationChecksByTransitivity, 190.1s TimeCoverageRelationStatistics Valid=387, Invalid=3035, Unknown=0, NotChecked=0, Total=3422 [2022-11-19 08:37:26,885 INFO L413 NwaCegarLoop]: 660 mSDtfsCounter, 71 mSDsluCounter, 7545 mSDsCounter, 0 mSdLazyCounter, 3627 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 8205 SdHoareTripleChecker+Invalid, 3975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 3627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 307 IncrementalHoareTripleChecker+Unchecked, 10.9s IncrementalHoareTripleChecker+Time [2022-11-19 08:37:26,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 8205 Invalid, 3975 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [41 Valid, 3627 Invalid, 0 Unknown, 307 Unchecked, 10.9s Time] [2022-11-19 08:37:26,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8135 states. [2022-11-19 08:37:27,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8135 to 8103. [2022-11-19 08:37:27,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8103 states, 5512 states have (on average 1.3439767779390421) internal successors, (7408), 5669 states have internal predecessors, (7408), 1816 states have call successors, (1816), 738 states have call predecessors, (1816), 774 states have return successors, (1944), 1792 states have call predecessors, (1944), 1815 states have call successors, (1944) [2022-11-19 08:37:27,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8103 states to 8103 states and 11168 transitions. [2022-11-19 08:37:27,421 INFO L78 Accepts]: Start accepts. Automaton has 8103 states and 11168 transitions. Word has length 125 [2022-11-19 08:37:27,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:37:27,421 INFO L495 AbstractCegarLoop]: Abstraction has 8103 states and 11168 transitions. [2022-11-19 08:37:27,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 21 states have internal predecessors, (65), 7 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 7 states have call predecessors, (15), 7 states have call successors, (15) [2022-11-19 08:37:27,422 INFO L276 IsEmpty]: Start isEmpty. Operand 8103 states and 11168 transitions. [2022-11-19 08:37:27,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-11-19 08:37:27,430 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:37:27,430 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:37:27,439 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8ea5647-c438-456b-8aa3-0807d89a8589/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-19 08:37:27,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8ea5647-c438-456b-8aa3-0807d89a8589/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-19 08:37:27,639 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:37:27,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:37:27,639 INFO L85 PathProgramCache]: Analyzing trace with hash -341951678, now seen corresponding path program 1 times [2022-11-19 08:37:27,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:37:27,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931495525] [2022-11-19 08:37:27,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:37:27,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:37:27,687 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:37:27,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [360746712] [2022-11-19 08:37:27,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:37:27,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:37:27,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8ea5647-c438-456b-8aa3-0807d89a8589/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:37:27,690 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8ea5647-c438-456b-8aa3-0807d89a8589/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:37:27,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8ea5647-c438-456b-8aa3-0807d89a8589/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-19 08:37:28,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:37:28,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 1278 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-19 08:37:28,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:37:28,389 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-11-19 08:37:28,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:37:28,536 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-11-19 08:37:28,536 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:37:28,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931495525] [2022-11-19 08:37:28,536 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:37:28,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360746712] [2022-11-19 08:37:28,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360746712] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:37:28,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [487717651] [2022-11-19 08:37:28,540 INFO L159 IcfgInterpreter]: Started Sifa with 86 locations of interest [2022-11-19 08:37:28,540 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:37:28,541 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:37:28,541 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:37:28,541 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:37:29,058 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 7 treesize of output 6 [2022-11-19 08:37:29,098 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 7 treesize of output 6 [2022-11-19 08:37:29,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:37:29,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:37:29,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:37:29,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 19 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 34 [2022-11-19 08:37:30,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:37:30,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:37:30,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:37:30,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 19 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 34 [2022-11-19 08:38:17,740 INFO L197 IcfgInterpreter]: Interpreting procedure __kmalloc with input of size 630 for LOIs [2022-11-19 08:38:19,456 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_zalloc with input of size 82 for LOIs [2022-11-19 08:38:19,472 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_malloc with input of size 630 for LOIs [2022-11-19 08:38:19,860 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:38:36,734 WARN L233 SmtUtils]: Spent 5.90s on a formula simplification. DAG size of input: 638 DAG size of output: 636 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:38:43,157 WARN L233 SmtUtils]: Spent 6.22s on a formula simplification. DAG size of input: 650 DAG size of output: 648 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:38:49,663 WARN L233 SmtUtils]: Spent 6.29s on a formula simplification. DAG size of input: 661 DAG size of output: 652 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:38:56,377 WARN L233 SmtUtils]: Spent 6.47s on a formula simplification. DAG size of input: 671 DAG size of output: 662 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:39:03,342 WARN L233 SmtUtils]: Spent 6.70s on a formula simplification. DAG size of input: 679 DAG size of output: 666 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:39:11,248 WARN L233 SmtUtils]: Spent 7.60s on a formula simplification. DAG size of input: 713 DAG size of output: 700 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:39:19,536 WARN L233 SmtUtils]: Spent 7.95s on a formula simplification. DAG size of input: 736 DAG size of output: 705 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:39:28,164 WARN L233 SmtUtils]: Spent 8.35s on a formula simplification. DAG size of input: 748 DAG size of output: 717 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:39:37,130 WARN L233 SmtUtils]: Spent 8.65s on a formula simplification. DAG size of input: 759 DAG size of output: 728 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:39:45,960 WARN L233 SmtUtils]: Spent 8.52s on a formula simplification. DAG size of input: 761 DAG size of output: 730 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:39:54,760 WARN L233 SmtUtils]: Spent 8.44s on a formula simplification. DAG size of input: 751 DAG size of output: 720 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:40:03,795 WARN L233 SmtUtils]: Spent 8.65s on a formula simplification. DAG size of input: 762 DAG size of output: 731 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:40:13,017 WARN L233 SmtUtils]: Spent 8.81s on a formula simplification. DAG size of input: 764 DAG size of output: 733 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:40:22,048 WARN L233 SmtUtils]: Spent 8.59s on a formula simplification. DAG size of input: 754 DAG size of output: 723 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:40:31,694 WARN L233 SmtUtils]: Spent 9.14s on a formula simplification. DAG size of input: 785 DAG size of output: 746 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:40:38,282 WARN L233 SmtUtils]: Spent 5.67s on a formula simplification. DAG size of input: 630 DAG size of output: 625 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:40:44,428 WARN L233 SmtUtils]: Spent 5.76s on a formula simplification. DAG size of input: 635 DAG size of output: 630 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:40:50,467 WARN L233 SmtUtils]: Spent 5.64s on a formula simplification. DAG size of input: 630 DAG size of output: 625 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:40:56,687 WARN L233 SmtUtils]: Spent 5.80s on a formula simplification. DAG size of input: 638 DAG size of output: 633 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:41:03,118 WARN L233 SmtUtils]: Spent 6.00s on a formula simplification. DAG size of input: 644 DAG size of output: 639 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:41:09,324 WARN L233 SmtUtils]: Spent 5.74s on a formula simplification. DAG size of input: 637 DAG size of output: 629 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:41:15,534 WARN L233 SmtUtils]: Spent 5.76s on a formula simplification. DAG size of input: 637 DAG size of output: 629 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:41:31,770 WARN L233 SmtUtils]: Spent 15.36s on a formula simplification. DAG size of input: 930 DAG size of output: 753 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:41:47,826 WARN L233 SmtUtils]: Spent 15.15s on a formula simplification. DAG size of input: 933 DAG size of output: 752 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)