./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-42f9f8d-1-111_1a-sound--oss--opl3.ko-entry_point_ldv-val-v0.8.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-42f9f8d-1-111_1a-sound--oss--opl3.ko-entry_point_ldv-val-v0.8.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs --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 d7bcbc7066f71bf6da4f6dede38e3e78b7607c55d003b39ab5a687b04791c2e1 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:29:46,202 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:29:46,204 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:29:46,240 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:29:46,243 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:29:46,248 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:29:46,251 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:29:46,257 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:29:46,259 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:29:46,260 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:29:46,262 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:29:46,263 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:29:46,264 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:29:46,265 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:29:46,267 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:29:46,268 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:29:46,270 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:29:46,271 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:29:46,279 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:29:46,281 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:29:46,283 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:29:46,292 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:29:46,293 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:29:46,294 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:29:46,298 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:29:46,299 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:29:46,299 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:29:46,300 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:29:46,301 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:29:46,308 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:29:46,309 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:29:46,310 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:29:46,311 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:29:46,312 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:29:46,313 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:29:46,314 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:29:46,314 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:29:46,315 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:29:46,315 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:29:46,316 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:29:46,317 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:29:46,320 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-19 14:29:46,370 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:29:46,370 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:29:46,377 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:29:46,377 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:29:46,378 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:29:46,378 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:29:46,378 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:29:46,378 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 14:29:46,384 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:29:46,385 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:29:46,385 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 14:29:46,385 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 14:29:46,385 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:29:46,386 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 14:29:46,386 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 14:29:46,386 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 14:29:46,387 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:29:46,387 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 14:29:46,387 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:29:46,388 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:29:46,388 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:29:46,388 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:29:46,388 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:29:46,388 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:29:46,389 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:29:46,389 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:29:46,389 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:29:46,389 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:29:46,390 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:29:46,390 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:29:46,390 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:29:46,390 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:29:46,390 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 14:29:46,391 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 14:29:46,391 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:29:46,391 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:29:46,391 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:29:46,391 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d7bcbc7066f71bf6da4f6dede38e3e78b7607c55d003b39ab5a687b04791c2e1 [2021-11-19 14:29:46,659 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:29:46,690 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:29:46,695 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:29:46,696 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:29:46,697 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:29:46,698 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-42f9f8d-1-111_1a-sound--oss--opl3.ko-entry_point_ldv-val-v0.8.cil.out.i [2021-11-19 14:29:46,783 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/data/ad0e13e5c/90a0c229d62e44ba972145ab4788d216/FLAGe83250fcd [2021-11-19 14:29:47,558 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:29:47,559 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-42f9f8d-1-111_1a-sound--oss--opl3.ko-entry_point_ldv-val-v0.8.cil.out.i [2021-11-19 14:29:47,606 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/data/ad0e13e5c/90a0c229d62e44ba972145ab4788d216/FLAGe83250fcd [2021-11-19 14:29:48,116 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/data/ad0e13e5c/90a0c229d62e44ba972145ab4788d216 [2021-11-19 14:29:48,120 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:29:48,124 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:29:48,128 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:29:48,128 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:29:48,132 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:29:48,132 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:29:48" (1/1) ... [2021-11-19 14:29:48,134 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41232164 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:29:48, skipping insertion in model container [2021-11-19 14:29:48,134 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:29:48" (1/1) ... [2021-11-19 14:29:48,141 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:29:48,246 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:29:49,201 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-42f9f8d-1-111_1a-sound--oss--opl3.ko-entry_point_ldv-val-v0.8.cil.out.i[209427,209440] [2021-11-19 14:29:49,216 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:29:49,409 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-19 14:29:49,411 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@350d861e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:29:49, skipping insertion in model container [2021-11-19 14:29:49,411 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:29:49,412 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 14:29:49,414 INFO L158 Benchmark]: Toolchain (without parser) took 1288.98ms. Allocated memory was 94.4MB in the beginning and 125.8MB in the end (delta: 31.5MB). Free memory was 51.3MB in the beginning and 79.2MB in the end (delta: -27.9MB). Peak memory consumption was 25.8MB. Max. memory is 16.1GB. [2021-11-19 14:29:49,415 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 94.4MB. Free memory was 63.7MB in the beginning and 63.7MB in the end (delta: 29.4kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 14:29:49,417 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1284.09ms. Allocated memory was 94.4MB in the beginning and 125.8MB in the end (delta: 31.5MB). Free memory was 51.2MB in the beginning and 79.2MB in the end (delta: -28.1MB). Peak memory consumption was 25.8MB. Max. memory is 16.1GB. [2021-11-19 14:29:49,420 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 94.4MB. Free memory was 63.7MB in the beginning and 63.7MB in the end (delta: 29.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1284.09ms. Allocated memory was 94.4MB in the beginning and 125.8MB in the end (delta: 31.5MB). Free memory was 51.2MB in the beginning and 79.2MB in the end (delta: -28.1MB). Peak memory consumption was 25.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 2842]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-42f9f8d-1-111_1a-sound--oss--opl3.ko-entry_point_ldv-val-v0.8.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs --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 d7bcbc7066f71bf6da4f6dede38e3e78b7607c55d003b39ab5a687b04791c2e1 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:29:51,737 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:29:51,739 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:29:51,788 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:29:51,789 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:29:51,795 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:29:51,799 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:29:51,804 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:29:51,808 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:29:51,815 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:29:51,817 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:29:51,819 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:29:51,819 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:29:51,822 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:29:51,824 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:29:51,827 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:29:51,828 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:29:51,829 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:29:51,834 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:29:51,843 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:29:51,845 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:29:51,847 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:29:51,850 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:29:51,852 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:29:51,855 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:29:51,856 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:29:51,857 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:29:51,859 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:29:51,859 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:29:51,860 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:29:51,861 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:29:51,862 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:29:51,864 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:29:51,864 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:29:51,866 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:29:51,866 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:29:51,867 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:29:51,867 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:29:51,882 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:29:51,885 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:29:51,885 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:29:51,886 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-19 14:29:51,929 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:29:51,929 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:29:51,943 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:29:51,943 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:29:51,943 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:29:51,943 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:29:51,944 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:29:51,944 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:29:51,944 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:29:51,944 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:29:51,945 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:29:51,945 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:29:51,946 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:29:51,946 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:29:51,946 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:29:51,946 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:29:51,947 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 14:29:51,947 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 14:29:51,947 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:29:51,947 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:29:51,947 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:29:51,948 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:29:51,948 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 14:29:51,948 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:29:51,948 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:29:51,949 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:29:51,949 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:29:51,949 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:29:51,949 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 14:29:51,950 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 14:29:51,950 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:29:51,950 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:29:51,950 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:29:51,951 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d7bcbc7066f71bf6da4f6dede38e3e78b7607c55d003b39ab5a687b04791c2e1 [2021-11-19 14:29:52,345 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:29:52,380 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:29:52,385 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:29:52,387 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:29:52,388 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:29:52,390 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-42f9f8d-1-111_1a-sound--oss--opl3.ko-entry_point_ldv-val-v0.8.cil.out.i [2021-11-19 14:29:52,468 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/data/1158c0e15/22e5681ca9ee4a3da49932ecb93b0704/FLAG858059e3f [2021-11-19 14:29:53,387 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:29:53,388 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-42f9f8d-1-111_1a-sound--oss--opl3.ko-entry_point_ldv-val-v0.8.cil.out.i [2021-11-19 14:29:53,438 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/data/1158c0e15/22e5681ca9ee4a3da49932ecb93b0704/FLAG858059e3f [2021-11-19 14:29:53,820 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/data/1158c0e15/22e5681ca9ee4a3da49932ecb93b0704 [2021-11-19 14:29:53,826 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:29:53,827 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:29:53,828 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:29:53,829 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:29:53,831 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:29:53,832 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:29:53" (1/1) ... [2021-11-19 14:29:53,833 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7629fc51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:29:53, skipping insertion in model container [2021-11-19 14:29:53,833 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:29:53" (1/1) ... [2021-11-19 14:29:53,840 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:29:53,935 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:29:55,119 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-42f9f8d-1-111_1a-sound--oss--opl3.ko-entry_point_ldv-val-v0.8.cil.out.i[209427,209440] [2021-11-19 14:29:55,136 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:29:55,251 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 14:29:55,286 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:29:55,604 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-42f9f8d-1-111_1a-sound--oss--opl3.ko-entry_point_ldv-val-v0.8.cil.out.i[209427,209440] [2021-11-19 14:29:55,621 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:29:55,701 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 14:29:55,973 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-42f9f8d-1-111_1a-sound--oss--opl3.ko-entry_point_ldv-val-v0.8.cil.out.i[209427,209440] [2021-11-19 14:29:55,979 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:29:56,127 INFO L208 MainTranslator]: Completed translation [2021-11-19 14:29:56,128 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:29:56 WrapperNode [2021-11-19 14:29:56,128 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:29:56,130 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 14:29:56,130 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 14:29:56,130 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 14:29:56,137 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:29:56" (1/1) ... [2021-11-19 14:29:56,231 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:29:56" (1/1) ... [2021-11-19 14:29:56,443 INFO L137 Inliner]: procedures = 120, calls = 3465, calls flagged for inlining = 27, calls inlined = 27, statements flattened = 4219 [2021-11-19 14:29:56,444 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 14:29:56,445 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 14:29:56,446 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 14:29:56,446 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 14:29:56,455 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:29:56" (1/1) ... [2021-11-19 14:29:56,456 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:29:56" (1/1) ... [2021-11-19 14:29:56,510 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:29:56" (1/1) ... [2021-11-19 14:29:56,510 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:29:56" (1/1) ... [2021-11-19 14:29:56,680 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:29:56" (1/1) ... [2021-11-19 14:29:56,711 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:29:56" (1/1) ... [2021-11-19 14:29:56,742 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:29:56" (1/1) ... [2021-11-19 14:29:56,775 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 14:29:56,777 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 14:29:56,780 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 14:29:56,783 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 14:29:56,784 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:29:56" (1/1) ... [2021-11-19 14:29:56,791 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:29:56,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:29:56,815 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 14:29:56,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 14:29:56,854 INFO L130 BoogieDeclarations]: Found specification of procedure opl3_alloc_voice [2021-11-19 14:29:56,855 INFO L138 BoogieDeclarations]: Found implementation of procedure opl3_alloc_voice [2021-11-19 14:29:56,855 INFO L130 BoogieDeclarations]: Found specification of procedure opl3_set_instr [2021-11-19 14:29:56,855 INFO L138 BoogieDeclarations]: Found implementation of procedure opl3_set_instr [2021-11-19 14:29:56,855 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-19 14:29:56,855 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_strcpy [2021-11-19 14:29:56,856 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_strcpy [2021-11-19 14:29:56,856 INFO L130 BoogieDeclarations]: Found specification of procedure opl3_reset [2021-11-19 14:29:56,856 INFO L138 BoogieDeclarations]: Found implementation of procedure opl3_reset [2021-11-19 14:29:56,856 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-19 14:29:56,856 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-19 14:29:56,857 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-19 14:29:56,857 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-19 14:29:56,857 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-19 14:29:56,857 INFO L130 BoogieDeclarations]: Found specification of procedure opl3_setup_voice [2021-11-19 14:29:56,857 INFO L138 BoogieDeclarations]: Found implementation of procedure opl3_setup_voice [2021-11-19 14:29:56,857 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-19 14:29:56,858 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-19 14:29:56,858 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-19 14:29:56,858 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-19 14:29:56,858 INFO L130 BoogieDeclarations]: Found specification of procedure opl3_command [2021-11-19 14:29:56,858 INFO L138 BoogieDeclarations]: Found implementation of procedure opl3_command [2021-11-19 14:29:56,859 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-19 14:29:56,859 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-19 14:29:56,860 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-19 14:29:56,860 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-19 14:29:56,860 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_len [2021-11-19 14:29:56,860 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_len [2021-11-19 14:29:56,861 INFO L130 BoogieDeclarations]: Found specification of procedure __release_region [2021-11-19 14:29:56,861 INFO L138 BoogieDeclarations]: Found implementation of procedure __release_region [2021-11-19 14:29:56,861 INFO L130 BoogieDeclarations]: Found specification of procedure opl3_hw_control [2021-11-19 14:29:56,861 INFO L138 BoogieDeclarations]: Found implementation of procedure opl3_hw_control [2021-11-19 14:29:56,861 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-19 14:29:56,862 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-19 14:29:56,862 INFO L130 BoogieDeclarations]: Found specification of procedure opl3_volume_method [2021-11-19 14:29:56,862 INFO L138 BoogieDeclarations]: Found implementation of procedure opl3_volume_method [2021-11-19 14:29:56,863 INFO L130 BoogieDeclarations]: Found specification of procedure set_voice_volume [2021-11-19 14:29:56,863 INFO L138 BoogieDeclarations]: Found implementation of procedure set_voice_volume [2021-11-19 14:29:56,863 INFO L130 BoogieDeclarations]: Found specification of procedure opl3_aftertouch [2021-11-19 14:29:56,863 INFO L138 BoogieDeclarations]: Found implementation of procedure opl3_aftertouch [2021-11-19 14:29:56,864 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-19 14:29:56,864 INFO L130 BoogieDeclarations]: Found specification of procedure freq_to_fnum [2021-11-19 14:29:56,864 INFO L138 BoogieDeclarations]: Found implementation of procedure freq_to_fnum [2021-11-19 14:29:56,864 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2021-11-19 14:29:56,864 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-19 14:29:56,864 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2021-11-19 14:29:56,865 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-19 14:29:56,865 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-19 14:29:56,865 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2021-11-19 14:29:56,865 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2021-11-19 14:29:56,866 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-19 14:29:56,867 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-19 14:29:56,867 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-19 14:29:56,868 INFO L130 BoogieDeclarations]: Found specification of procedure opl3_load_patch [2021-11-19 14:29:56,869 INFO L138 BoogieDeclarations]: Found implementation of procedure opl3_load_patch [2021-11-19 14:29:56,869 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2021-11-19 14:29:56,870 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2021-11-19 14:29:56,870 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 14:29:56,870 INFO L130 BoogieDeclarations]: Found specification of procedure opl3_start_note [2021-11-19 14:29:56,871 INFO L138 BoogieDeclarations]: Found implementation of procedure opl3_start_note [2021-11-19 14:29:56,871 INFO L130 BoogieDeclarations]: Found specification of procedure opl3_kill_note [2021-11-19 14:29:56,871 INFO L138 BoogieDeclarations]: Found implementation of procedure opl3_kill_note [2021-11-19 14:29:56,871 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2021-11-19 14:29:56,871 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2021-11-19 14:29:56,871 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-19 14:29:56,872 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 14:29:56,872 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2021-11-19 14:29:56,872 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2021-11-19 14:29:56,872 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-19 14:29:56,872 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-19 14:29:56,873 INFO L130 BoogieDeclarations]: Found specification of procedure opl3_ioctl [2021-11-19 14:29:56,873 INFO L138 BoogieDeclarations]: Found implementation of procedure opl3_ioctl [2021-11-19 14:29:56,873 INFO L130 BoogieDeclarations]: Found specification of procedure compute_finetune [2021-11-19 14:29:56,873 INFO L138 BoogieDeclarations]: Found implementation of procedure compute_finetune [2021-11-19 14:29:56,873 INFO L130 BoogieDeclarations]: Found specification of procedure opl3_bender [2021-11-19 14:29:56,873 INFO L138 BoogieDeclarations]: Found implementation of procedure opl3_bender [2021-11-19 14:29:56,874 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-19 14:29:56,874 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-19 14:29:56,874 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-19 14:29:56,874 INFO L130 BoogieDeclarations]: Found specification of procedure opl3_panning [2021-11-19 14:29:56,874 INFO L138 BoogieDeclarations]: Found implementation of procedure opl3_panning [2021-11-19 14:29:56,874 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 14:29:56,875 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-19 14:29:56,875 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-19 14:29:56,875 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2021-11-19 14:29:56,876 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2021-11-19 14:29:56,876 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2021-11-19 14:29:56,876 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 14:29:56,877 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_copy_from_user_7 [2021-11-19 14:29:56,877 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_copy_from_user_7 [2021-11-19 14:29:56,878 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-19 14:29:56,878 INFO L130 BoogieDeclarations]: Found specification of procedure calc_vol [2021-11-19 14:29:56,878 INFO L138 BoogieDeclarations]: Found implementation of procedure calc_vol [2021-11-19 14:29:56,878 INFO L130 BoogieDeclarations]: Found specification of procedure inb [2021-11-19 14:29:56,878 INFO L138 BoogieDeclarations]: Found implementation of procedure inb [2021-11-19 14:29:56,879 INFO L130 BoogieDeclarations]: Found specification of procedure outb [2021-11-19 14:29:56,879 INFO L138 BoogieDeclarations]: Found implementation of procedure outb [2021-11-19 14:29:56,879 INFO L130 BoogieDeclarations]: Found specification of procedure opl3_controller [2021-11-19 14:29:56,879 INFO L138 BoogieDeclarations]: Found implementation of procedure opl3_controller [2021-11-19 14:29:56,879 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-19 14:29:56,879 INFO L130 BoogieDeclarations]: Found specification of procedure store_instr [2021-11-19 14:29:56,880 INFO L138 BoogieDeclarations]: Found implementation of procedure store_instr [2021-11-19 14:29:56,880 INFO L130 BoogieDeclarations]: Found specification of procedure __request_region [2021-11-19 14:29:56,880 INFO L138 BoogieDeclarations]: Found implementation of procedure __request_region [2021-11-19 14:29:56,880 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 14:29:56,881 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 14:29:56,881 INFO L130 BoogieDeclarations]: Found specification of procedure bend_pitch [2021-11-19 14:29:56,881 INFO L138 BoogieDeclarations]: Found implementation of procedure bend_pitch [2021-11-19 14:29:57,375 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 14:29:57,378 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 14:30:05,474 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-19 14:30:32,565 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 14:30:32,587 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 14:30:32,587 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-19 14:30:32,592 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:30:32 BoogieIcfgContainer [2021-11-19 14:30:32,592 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 14:30:32,594 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 14:30:32,594 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 14:30:32,598 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 14:30:32,598 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 02:29:53" (1/3) ... [2021-11-19 14:30:32,599 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@180c1d51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:30:32, skipping insertion in model container [2021-11-19 14:30:32,599 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:29:56" (2/3) ... [2021-11-19 14:30:32,600 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@180c1d51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:30:32, skipping insertion in model container [2021-11-19 14:30:32,600 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:30:32" (3/3) ... [2021-11-19 14:30:32,602 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-stable-42f9f8d-1-111_1a-sound--oss--opl3.ko-entry_point_ldv-val-v0.8.cil.out.i [2021-11-19 14:30:32,608 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 14:30:32,609 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 14:30:32,679 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 14:30:32,688 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-19 14:30:32,688 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 14:30:32,734 INFO L276 IsEmpty]: Start isEmpty. Operand has 828 states, 583 states have (on average 1.397941680960549) internal successors, (815), 599 states have internal predecessors, (815), 205 states have call successors, (205), 39 states have call predecessors, (205), 38 states have return successors, (202), 198 states have call predecessors, (202), 202 states have call successors, (202) [2021-11-19 14:30:32,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2021-11-19 14:30:32,763 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:30:32,765 INFO L514 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:30:32,766 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:30:32,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:30:32,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1211381963, now seen corresponding path program 1 times [2021-11-19 14:30:32,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:30:32,804 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [377096437] [2021-11-19 14:30:32,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:30:32,806 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:30:32,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:30:32,813 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:30:32,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 14:30:35,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:30:35,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 4506 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-19 14:30:35,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:30:37,849 INFO L134 CoverageAnalysis]: Checked inductivity of 3789 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 3738 trivial. 0 not checked. [2021-11-19 14:30:37,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:30:39,353 INFO L134 CoverageAnalysis]: Checked inductivity of 3789 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 3774 trivial. 0 not checked. [2021-11-19 14:30:39,354 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:30:39,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [377096437] [2021-11-19 14:30:39,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [377096437] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:30:39,356 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:30:39,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2021-11-19 14:30:39,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699681063] [2021-11-19 14:30:39,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:30:39,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-19 14:30:39,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:30:39,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-19 14:30:39,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 14:30:39,408 INFO L87 Difference]: Start difference. First operand has 828 states, 583 states have (on average 1.397941680960549) internal successors, (815), 599 states have internal predecessors, (815), 205 states have call successors, (205), 39 states have call predecessors, (205), 38 states have return successors, (202), 198 states have call predecessors, (202), 202 states have call successors, (202) Second operand has 2 states, 2 states have (on average 42.0) internal successors, (84), 2 states have internal predecessors, (84), 2 states have call successors, (50), 2 states have call predecessors, (50), 2 states have return successors, (48), 2 states have call predecessors, (48), 2 states have call successors, (48) [2021-11-19 14:30:39,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:30:39,620 INFO L93 Difference]: Finished difference Result 1652 states and 2462 transitions. [2021-11-19 14:30:39,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 14:30:39,624 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 42.0) internal successors, (84), 2 states have internal predecessors, (84), 2 states have call successors, (50), 2 states have call predecessors, (50), 2 states have return successors, (48), 2 states have call predecessors, (48), 2 states have call successors, (48) Word has length 358 [2021-11-19 14:30:39,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:30:39,681 INFO L225 Difference]: With dead ends: 1652 [2021-11-19 14:30:39,688 INFO L226 Difference]: Without dead ends: 807 [2021-11-19 14:30:39,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 714 GetRequests, 714 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 14:30:39,726 INFO L933 BasicCegarLoop]: 1216 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1216 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:30:39,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1216 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:30:39,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2021-11-19 14:30:39,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 807. [2021-11-19 14:30:39,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 807 states, 569 states have (on average 1.3848857644991213) internal successors, (788), 581 states have internal predecessors, (788), 199 states have call successors, (199), 38 states have call predecessors, (199), 38 states have return successors, (199), 195 states have call predecessors, (199), 199 states have call successors, (199) [2021-11-19 14:30:39,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 1186 transitions. [2021-11-19 14:30:39,980 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 1186 transitions. Word has length 358 [2021-11-19 14:30:39,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:30:39,981 INFO L470 AbstractCegarLoop]: Abstraction has 807 states and 1186 transitions. [2021-11-19 14:30:39,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 42.0) internal successors, (84), 2 states have internal predecessors, (84), 2 states have call successors, (50), 2 states have call predecessors, (50), 2 states have return successors, (48), 2 states have call predecessors, (48), 2 states have call successors, (48) [2021-11-19 14:30:39,982 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 1186 transitions. [2021-11-19 14:30:39,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2021-11-19 14:30:39,996 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:30:39,997 INFO L514 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:30:40,069 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 14:30:40,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:30:40,217 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:30:40,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:30:40,222 INFO L85 PathProgramCache]: Analyzing trace with hash 597337405, now seen corresponding path program 1 times [2021-11-19 14:30:40,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:30:40,230 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [864225567] [2021-11-19 14:30:40,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:30:40,231 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:30:40,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:30:40,233 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:30:40,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 14:30:42,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:30:43,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 4506 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:30:43,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:30:45,111 INFO L134 CoverageAnalysis]: Checked inductivity of 3789 backedges. 190 proven. 0 refuted. 0 times theorem prover too weak. 3599 trivial. 0 not checked. [2021-11-19 14:30:45,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:30:46,384 INFO L134 CoverageAnalysis]: Checked inductivity of 3789 backedges. 0 proven. 152 refuted. 0 times theorem prover too weak. 3637 trivial. 0 not checked. [2021-11-19 14:30:46,384 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:30:46,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [864225567] [2021-11-19 14:30:46,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [864225567] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:30:46,385 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:30:46,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:30:46,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554989649] [2021-11-19 14:30:46,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:30:46,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:30:46,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:30:46,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:30:46,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:30:46,388 INFO L87 Difference]: Start difference. First operand 807 states and 1186 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (48), 2 states have call predecessors, (48), 3 states have return successors, (45), 2 states have call predecessors, (45), 2 states have call successors, (45) [2021-11-19 14:30:47,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:30:47,129 INFO L93 Difference]: Finished difference Result 1596 states and 2388 transitions. [2021-11-19 14:30:47,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:30:47,131 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (48), 2 states have call predecessors, (48), 3 states have return successors, (45), 2 states have call predecessors, (45), 2 states have call successors, (45) Word has length 358 [2021-11-19 14:30:47,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:30:47,141 INFO L225 Difference]: With dead ends: 1596 [2021-11-19 14:30:47,141 INFO L226 Difference]: Without dead ends: 808 [2021-11-19 14:30:47,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 715 GetRequests, 710 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:30:47,149 INFO L933 BasicCegarLoop]: 1184 mSDtfsCounter, 3 mSDsluCounter, 2289 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 3473 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:30:47,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 3473 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 14:30:47,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 808 states. [2021-11-19 14:30:47,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 808 to 808. [2021-11-19 14:30:47,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 808 states, 570 states have (on average 1.3842105263157896) internal successors, (789), 582 states have internal predecessors, (789), 199 states have call successors, (199), 38 states have call predecessors, (199), 38 states have return successors, (199), 195 states have call predecessors, (199), 199 states have call successors, (199) [2021-11-19 14:30:47,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 1187 transitions. [2021-11-19 14:30:47,214 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 1187 transitions. Word has length 358 [2021-11-19 14:30:47,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:30:47,217 INFO L470 AbstractCegarLoop]: Abstraction has 808 states and 1187 transitions. [2021-11-19 14:30:47,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (48), 2 states have call predecessors, (48), 3 states have return successors, (45), 2 states have call predecessors, (45), 2 states have call successors, (45) [2021-11-19 14:30:47,218 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 1187 transitions. [2021-11-19 14:30:47,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 398 [2021-11-19 14:30:47,229 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:30:47,230 INFO L514 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:30:47,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 14:30:47,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:30:47,452 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:30:47,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:30:47,453 INFO L85 PathProgramCache]: Analyzing trace with hash -363889413, now seen corresponding path program 1 times [2021-11-19 14:30:47,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:30:47,459 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1162799611] [2021-11-19 14:30:47,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:30:47,460 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:30:47,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:30:47,461 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:30:47,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 14:30:50,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:30:50,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 4701 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:30:50,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:30:51,949 INFO L134 CoverageAnalysis]: Checked inductivity of 6051 backedges. 304 proven. 1 refuted. 0 times theorem prover too weak. 5746 trivial. 0 not checked. [2021-11-19 14:30:51,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:30:53,385 INFO L134 CoverageAnalysis]: Checked inductivity of 6051 backedges. 0 proven. 267 refuted. 0 times theorem prover too weak. 5784 trivial. 0 not checked. [2021-11-19 14:30:53,385 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:30:53,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1162799611] [2021-11-19 14:30:53,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1162799611] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:30:53,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1467358703] [2021-11-19 14:30:53,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:30:53,386 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:30:53,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:30:53,391 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:30:53,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-11-19 14:30:55,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:30:55,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 4701 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:30:55,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:30:56,153 INFO L134 CoverageAnalysis]: Checked inductivity of 6051 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6051 trivial. 0 not checked. [2021-11-19 14:30:56,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:30:57,098 INFO L134 CoverageAnalysis]: Checked inductivity of 6051 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6051 trivial. 0 not checked. [2021-11-19 14:30:57,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1467358703] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:30:57,098 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:30:57,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-19 14:30:57,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652372972] [2021-11-19 14:30:57,099 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:30:57,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:30:57,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:30:57,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:30:57,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:30:57,102 INFO L87 Difference]: Start difference. First operand 808 states and 1187 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (48), 2 states have call predecessors, (48), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2021-11-19 14:30:58,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:30:58,377 INFO L93 Difference]: Finished difference Result 1666 states and 2446 transitions. [2021-11-19 14:30:58,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:30:58,378 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (48), 2 states have call predecessors, (48), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) Word has length 397 [2021-11-19 14:30:58,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:30:58,399 INFO L225 Difference]: With dead ends: 1666 [2021-11-19 14:30:58,399 INFO L226 Difference]: Without dead ends: 963 [2021-11-19 14:30:58,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1584 GetRequests, 1577 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:30:58,412 INFO L933 BasicCegarLoop]: 1254 mSDtfsCounter, 361 mSDsluCounter, 946 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 2200 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:30:58,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [361 Valid, 2200 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-19 14:30:58,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2021-11-19 14:30:58,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 963. [2021-11-19 14:30:58,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 677 states have (on average 1.3766617429837518) internal successors, (932), 694 states have internal predecessors, (932), 237 states have call successors, (237), 48 states have call predecessors, (237), 48 states have return successors, (237), 233 states have call predecessors, (237), 237 states have call successors, (237) [2021-11-19 14:30:58,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 1406 transitions. [2021-11-19 14:30:58,503 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 1406 transitions. Word has length 397 [2021-11-19 14:30:58,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:30:58,509 INFO L470 AbstractCegarLoop]: Abstraction has 963 states and 1406 transitions. [2021-11-19 14:30:58,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (48), 2 states have call predecessors, (48), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2021-11-19 14:30:58,509 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 1406 transitions. [2021-11-19 14:30:58,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2021-11-19 14:30:58,517 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:30:58,518 INFO L514 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:30:58,541 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-11-19 14:30:58,807 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-19 14:30:58,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:30:58,942 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:30:58,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:30:58,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1701934199, now seen corresponding path program 1 times [2021-11-19 14:30:58,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:30:58,947 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1154636048] [2021-11-19 14:30:58,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:30:58,947 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:30:58,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:30:58,948 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:30:58,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 14:31:01,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:31:01,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 4720 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:31:01,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:31:03,307 INFO L134 CoverageAnalysis]: Checked inductivity of 6053 backedges. 304 proven. 1 refuted. 0 times theorem prover too weak. 5748 trivial. 0 not checked. [2021-11-19 14:31:03,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:31:04,775 INFO L134 CoverageAnalysis]: Checked inductivity of 6053 backedges. 0 proven. 267 refuted. 0 times theorem prover too weak. 5786 trivial. 0 not checked. [2021-11-19 14:31:04,775 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:31:04,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1154636048] [2021-11-19 14:31:04,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1154636048] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:31:04,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [667829585] [2021-11-19 14:31:04,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:31:04,777 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:31:04,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:31:04,779 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:31:04,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-19 14:31:06,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:31:06,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 4720 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:31:06,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:31:10,812 INFO L134 CoverageAnalysis]: Checked inductivity of 6053 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6051 trivial. 0 not checked. [2021-11-19 14:31:10,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:31:12,464 INFO L134 CoverageAnalysis]: Checked inductivity of 6053 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6051 trivial. 0 not checked. [2021-11-19 14:31:12,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [667829585] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:31:12,465 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:31:12,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [5, 5] total 10 [2021-11-19 14:31:12,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65257267] [2021-11-19 14:31:12,466 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:31:12,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:31:12,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:31:12,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:31:12,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:31:12,469 INFO L87 Difference]: Start difference. First operand 963 states and 1406 transitions. Second operand has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 4 states have call successors, (93), 3 states have call predecessors, (93), 2 states have return successors, (90), 3 states have call predecessors, (90), 3 states have call successors, (90) [2021-11-19 14:31:13,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:31:13,298 INFO L93 Difference]: Finished difference Result 1821 states and 2664 transitions. [2021-11-19 14:31:13,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:31:13,299 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 4 states have call successors, (93), 3 states have call predecessors, (93), 2 states have return successors, (90), 3 states have call predecessors, (90), 3 states have call successors, (90) Word has length 409 [2021-11-19 14:31:13,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:31:13,308 INFO L225 Difference]: With dead ends: 1821 [2021-11-19 14:31:13,308 INFO L226 Difference]: Without dead ends: 963 [2021-11-19 14:31:13,314 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1632 GetRequests, 1624 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:31:13,317 INFO L933 BasicCegarLoop]: 1183 mSDtfsCounter, 1762 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 355 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1762 SdHoareTripleChecker+Valid, 1183 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 355 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:31:13,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1762 Valid, 1183 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [355 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 14:31:13,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2021-11-19 14:31:13,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 963. [2021-11-19 14:31:13,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 677 states have (on average 1.3737075332348596) internal successors, (930), 694 states have internal predecessors, (930), 237 states have call successors, (237), 48 states have call predecessors, (237), 48 states have return successors, (237), 233 states have call predecessors, (237), 237 states have call successors, (237) [2021-11-19 14:31:13,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 1404 transitions. [2021-11-19 14:31:13,385 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 1404 transitions. Word has length 409 [2021-11-19 14:31:13,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:31:13,387 INFO L470 AbstractCegarLoop]: Abstraction has 963 states and 1404 transitions. [2021-11-19 14:31:13,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 4 states have call successors, (93), 3 states have call predecessors, (93), 2 states have return successors, (90), 3 states have call predecessors, (90), 3 states have call successors, (90) [2021-11-19 14:31:13,388 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 1404 transitions. [2021-11-19 14:31:13,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2021-11-19 14:31:13,393 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:31:13,393 INFO L514 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:31:13,418 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-11-19 14:31:13,669 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 14:31:13,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:31:13,809 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:31:13,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:31:13,810 INFO L85 PathProgramCache]: Analyzing trace with hash -2117369933, now seen corresponding path program 1 times [2021-11-19 14:31:13,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:31:13,813 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2114189687] [2021-11-19 14:31:13,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:31:13,813 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:31:13,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:31:13,814 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:31:13,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 14:31:16,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:31:16,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 4726 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:31:16,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:31:18,445 INFO L134 CoverageAnalysis]: Checked inductivity of 6053 backedges. 304 proven. 1 refuted. 0 times theorem prover too weak. 5748 trivial. 0 not checked. [2021-11-19 14:31:18,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:31:20,330 INFO L134 CoverageAnalysis]: Checked inductivity of 6053 backedges. 0 proven. 267 refuted. 0 times theorem prover too weak. 5786 trivial. 0 not checked. [2021-11-19 14:31:20,331 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:31:20,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2114189687] [2021-11-19 14:31:20,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2114189687] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:31:20,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [841593123] [2021-11-19 14:31:20,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:31:20,332 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:31:20,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:31:20,333 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:31:20,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-19 14:31:22,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:31:22,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 4726 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:31:22,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:31:23,685 INFO L134 CoverageAnalysis]: Checked inductivity of 6053 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6051 trivial. 0 not checked. [2021-11-19 14:31:23,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:31:24,671 INFO L134 CoverageAnalysis]: Checked inductivity of 6053 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6051 trivial. 0 not checked. [2021-11-19 14:31:24,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [841593123] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:31:24,672 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:31:24,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 12 [2021-11-19 14:31:24,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456717516] [2021-11-19 14:31:24,674 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:31:24,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:31:24,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:31:24,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:31:24,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:31:24,677 INFO L87 Difference]: Start difference. First operand 963 states and 1404 transitions. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 2 states have call successors, (48), 2 states have call predecessors, (48), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2021-11-19 14:31:26,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:31:26,292 INFO L93 Difference]: Finished difference Result 1828 states and 2669 transitions. [2021-11-19 14:31:26,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:31:26,293 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 2 states have call successors, (48), 2 states have call predecessors, (48), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) Word has length 411 [2021-11-19 14:31:26,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:31:26,309 INFO L225 Difference]: With dead ends: 1828 [2021-11-19 14:31:26,309 INFO L226 Difference]: Without dead ends: 962 [2021-11-19 14:31:26,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1641 GetRequests, 1630 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:31:26,317 INFO L933 BasicCegarLoop]: 1183 mSDtfsCounter, 3 mSDsluCounter, 4722 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 5905 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:31:26,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 5905 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-19 14:31:26,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 962 states. [2021-11-19 14:31:26,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 962 to 950. [2021-11-19 14:31:26,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 950 states, 664 states have (on average 1.3719879518072289) internal successors, (911), 683 states have internal predecessors, (911), 237 states have call successors, (237), 48 states have call predecessors, (237), 48 states have return successors, (237), 231 states have call predecessors, (237), 237 states have call successors, (237) [2021-11-19 14:31:26,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 950 states to 950 states and 1385 transitions. [2021-11-19 14:31:26,391 INFO L78 Accepts]: Start accepts. Automaton has 950 states and 1385 transitions. Word has length 411 [2021-11-19 14:31:26,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:31:26,395 INFO L470 AbstractCegarLoop]: Abstraction has 950 states and 1385 transitions. [2021-11-19 14:31:26,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 2 states have call successors, (48), 2 states have call predecessors, (48), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2021-11-19 14:31:26,396 INFO L276 IsEmpty]: Start isEmpty. Operand 950 states and 1385 transitions. [2021-11-19 14:31:26,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 415 [2021-11-19 14:31:26,402 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:31:26,402 INFO L514 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:31:26,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-19 14:31:26,646 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-11-19 14:31:26,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:31:26,827 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:31:26,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:31:26,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1387715029, now seen corresponding path program 1 times [2021-11-19 14:31:26,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:31:26,834 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1432452635] [2021-11-19 14:31:26,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:31:26,834 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:31:26,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:31:26,837 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:31:26,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 14:31:29,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:31:29,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 4735 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:31:29,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:31:31,822 INFO L134 CoverageAnalysis]: Checked inductivity of 6053 backedges. 304 proven. 1 refuted. 0 times theorem prover too weak. 5748 trivial. 0 not checked. [2021-11-19 14:31:31,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:31:33,288 INFO L134 CoverageAnalysis]: Checked inductivity of 6053 backedges. 0 proven. 267 refuted. 0 times theorem prover too weak. 5786 trivial. 0 not checked. [2021-11-19 14:31:33,289 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:31:33,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1432452635] [2021-11-19 14:31:33,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1432452635] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:31:33,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1750030330] [2021-11-19 14:31:33,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:31:33,290 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:31:33,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:31:33,315 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:31:33,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-19 14:31:35,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:31:35,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 4735 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:31:35,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:31:36,045 INFO L134 CoverageAnalysis]: Checked inductivity of 6053 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6051 trivial. 0 not checked. [2021-11-19 14:31:36,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:31:36,766 INFO L134 CoverageAnalysis]: Checked inductivity of 6053 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6051 trivial. 0 not checked. [2021-11-19 14:31:36,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1750030330] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:31:36,767 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:31:36,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-19 14:31:36,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104896301] [2021-11-19 14:31:36,768 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:31:36,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:31:36,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:31:36,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:31:36,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:31:36,769 INFO L87 Difference]: Start difference. First operand 950 states and 1385 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 2 states have call successors, (48), 2 states have call predecessors, (48), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2021-11-19 14:31:39,531 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:31:41,824 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:31:43,903 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:31:45,705 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:31:49,445 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:31:52,139 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:31:54,838 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:31:58,833 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:32:02,025 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:32:02,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:32:02,249 INFO L93 Difference]: Finished difference Result 2452 states and 3579 transitions. [2021-11-19 14:32:02,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:32:02,254 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 2 states have call successors, (48), 2 states have call predecessors, (48), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) Word has length 414 [2021-11-19 14:32:02,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:32:02,270 INFO L225 Difference]: With dead ends: 2452 [2021-11-19 14:32:02,270 INFO L226 Difference]: Without dead ends: 1607 [2021-11-19 14:32:02,276 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1652 GetRequests, 1645 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:32:02,277 INFO L933 BasicCegarLoop]: 1274 mSDtfsCounter, 953 mSDsluCounter, 994 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 3 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 960 SdHoareTripleChecker+Valid, 2268 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:32:02,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [960 Valid, 2268 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 169 Invalid, 8 Unknown, 0 Unchecked, 25.4s Time] [2021-11-19 14:32:02,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1607 states. [2021-11-19 14:32:02,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1607 to 1599. [2021-11-19 14:32:02,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1599 states, 1150 states have (on average 1.3921739130434783) internal successors, (1601), 1183 states have internal predecessors, (1601), 361 states have call successors, (361), 87 states have call predecessors, (361), 87 states have return successors, (368), 348 states have call predecessors, (368), 361 states have call successors, (368) [2021-11-19 14:32:02,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1599 states to 1599 states and 2330 transitions. [2021-11-19 14:32:02,397 INFO L78 Accepts]: Start accepts. Automaton has 1599 states and 2330 transitions. Word has length 414 [2021-11-19 14:32:02,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:32:02,399 INFO L470 AbstractCegarLoop]: Abstraction has 1599 states and 2330 transitions. [2021-11-19 14:32:02,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 2 states have call successors, (48), 2 states have call predecessors, (48), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2021-11-19 14:32:02,399 INFO L276 IsEmpty]: Start isEmpty. Operand 1599 states and 2330 transitions. [2021-11-19 14:32:02,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 417 [2021-11-19 14:32:02,404 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:32:02,405 INFO L514 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:32:02,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-19 14:32:02,691 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-11-19 14:32:02,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:32:02,819 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:32:02,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:32:02,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1894980806, now seen corresponding path program 1 times [2021-11-19 14:32:02,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:32:02,823 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1073736910] [2021-11-19 14:32:02,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:32:02,823 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:32:02,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:32:02,824 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:32:02,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 14:32:05,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:32:05,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 4737 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:32:05,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:32:06,923 INFO L134 CoverageAnalysis]: Checked inductivity of 6053 backedges. 304 proven. 1 refuted. 0 times theorem prover too weak. 5748 trivial. 0 not checked. [2021-11-19 14:32:06,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:32:08,440 INFO L134 CoverageAnalysis]: Checked inductivity of 6053 backedges. 0 proven. 267 refuted. 0 times theorem prover too weak. 5786 trivial. 0 not checked. [2021-11-19 14:32:08,440 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:32:08,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1073736910] [2021-11-19 14:32:08,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1073736910] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:32:08,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1906023219] [2021-11-19 14:32:08,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:32:08,441 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:32:08,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:32:08,442 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:32:08,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-19 14:32:10,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:32:10,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 4737 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:32:10,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:32:11,449 INFO L134 CoverageAnalysis]: Checked inductivity of 6053 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6051 trivial. 0 not checked. [2021-11-19 14:32:11,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:32:12,343 INFO L134 CoverageAnalysis]: Checked inductivity of 6053 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6051 trivial. 0 not checked. [2021-11-19 14:32:12,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1906023219] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:32:12,344 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:32:12,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 10 [2021-11-19 14:32:12,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263369142] [2021-11-19 14:32:12,345 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:32:12,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:32:12,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:32:12,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:32:12,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:32:12,347 INFO L87 Difference]: Start difference. First operand 1599 states and 2330 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (48), 2 states have call predecessors, (48), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2021-11-19 14:32:12,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:32:12,559 INFO L93 Difference]: Finished difference Result 3095 states and 4512 transitions. [2021-11-19 14:32:12,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:32:12,561 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (48), 2 states have call predecessors, (48), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) Word has length 416 [2021-11-19 14:32:12,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:32:12,579 INFO L225 Difference]: With dead ends: 3095 [2021-11-19 14:32:12,580 INFO L226 Difference]: Without dead ends: 1564 [2021-11-19 14:32:12,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1661 GetRequests, 1652 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:32:12,592 INFO L933 BasicCegarLoop]: 1181 mSDtfsCounter, 1 mSDsluCounter, 2355 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 3536 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:32:12,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 3536 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:32:12,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1564 states. [2021-11-19 14:32:12,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1564 to 1564. [2021-11-19 14:32:12,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1564 states, 1121 states have (on average 1.3862622658340766) internal successors, (1554), 1152 states have internal predecessors, (1554), 357 states have call successors, (357), 85 states have call predecessors, (357), 85 states have return successors, (364), 344 states have call predecessors, (364), 357 states have call successors, (364) [2021-11-19 14:32:12,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1564 states to 1564 states and 2275 transitions. [2021-11-19 14:32:12,706 INFO L78 Accepts]: Start accepts. Automaton has 1564 states and 2275 transitions. Word has length 416 [2021-11-19 14:32:12,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:32:12,707 INFO L470 AbstractCegarLoop]: Abstraction has 1564 states and 2275 transitions. [2021-11-19 14:32:12,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (48), 2 states have call predecessors, (48), 1 states have return successors, (45), 1 states have call predecessors, (45), 1 states have call successors, (45) [2021-11-19 14:32:12,708 INFO L276 IsEmpty]: Start isEmpty. Operand 1564 states and 2275 transitions. [2021-11-19 14:32:12,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2021-11-19 14:32:12,715 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:32:12,716 INFO L514 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:32:12,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-19 14:32:12,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-19 14:32:13,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:32:13,139 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:32:13,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:32:13,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1187917022, now seen corresponding path program 1 times [2021-11-19 14:32:13,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:32:13,144 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [639804013] [2021-11-19 14:32:13,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:32:13,144 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:32:13,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:32:13,145 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:32:13,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-19 14:32:16,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:32:16,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 4990 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:32:16,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:32:19,055 INFO L134 CoverageAnalysis]: Checked inductivity of 6207 backedges. 304 proven. 1 refuted. 0 times theorem prover too weak. 5902 trivial. 0 not checked. [2021-11-19 14:32:19,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:32:20,993 INFO L134 CoverageAnalysis]: Checked inductivity of 6207 backedges. 0 proven. 267 refuted. 0 times theorem prover too weak. 5940 trivial. 0 not checked. [2021-11-19 14:32:20,994 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:32:20,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [639804013] [2021-11-19 14:32:20,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [639804013] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:32:20,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1734831925] [2021-11-19 14:32:20,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:32:20,995 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:32:20,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:32:20,996 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:32:20,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-19 14:32:23,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:32:23,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 4990 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-19 14:32:23,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:32:26,913 INFO L134 CoverageAnalysis]: Checked inductivity of 6207 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6201 trivial. 0 not checked. [2021-11-19 14:32:26,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:32:29,070 INFO L134 CoverageAnalysis]: Checked inductivity of 6207 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6203 trivial. 0 not checked. [2021-11-19 14:32:29,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1734831925] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:32:29,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970496793] [2021-11-19 14:32:29,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:32:29,071 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:32:29,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:32:29,072 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:32:29,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-19 14:32:38,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:32:40,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 4990 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:32:40,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:32:41,647 INFO L134 CoverageAnalysis]: Checked inductivity of 6207 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6207 trivial. 0 not checked. [2021-11-19 14:32:41,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:32:43,351 INFO L134 CoverageAnalysis]: Checked inductivity of 6207 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6207 trivial. 0 not checked. [2021-11-19 14:32:43,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970496793] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:32:43,351 INFO L186 FreeRefinementEngine]: Found 2 perfect and 4 imperfect interpolant sequences. [2021-11-19 14:32:43,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [5, 5, 8, 8] total 28 [2021-11-19 14:32:43,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539051410] [2021-11-19 14:32:43,353 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:32:43,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 14:32:43,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:32:43,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 14:32:43,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=684, Unknown=0, NotChecked=0, Total=756 [2021-11-19 14:32:43,356 INFO L87 Difference]: Start difference. First operand 1564 states and 2275 transitions. Second operand has 10 states, 8 states have (on average 16.5) internal successors, (132), 6 states have internal predecessors, (132), 3 states have call successors, (61), 5 states have call predecessors, (61), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2021-11-19 14:32:44,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:32:44,400 INFO L93 Difference]: Finished difference Result 1622 states and 2346 transitions. [2021-11-19 14:32:44,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:32:44,401 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 16.5) internal successors, (132), 6 states have internal predecessors, (132), 3 states have call successors, (61), 5 states have call predecessors, (61), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) Word has length 527 [2021-11-19 14:32:44,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:32:44,420 INFO L225 Difference]: With dead ends: 1622 [2021-11-19 14:32:44,420 INFO L226 Difference]: Without dead ends: 1620 [2021-11-19 14:32:44,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3159 GetRequests, 3130 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2021-11-19 14:32:44,424 INFO L933 BasicCegarLoop]: 1174 mSDtfsCounter, 54 mSDsluCounter, 8184 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 9358 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:32:44,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 9358 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 14:32:44,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1620 states. [2021-11-19 14:32:44,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1620 to 1620. [2021-11-19 14:32:44,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1620 states, 1159 states have (on average 1.3770491803278688) internal successors, (1596), 1190 states have internal predecessors, (1596), 369 states have call successors, (369), 91 states have call predecessors, (369), 91 states have return successors, (376), 356 states have call predecessors, (376), 369 states have call successors, (376) [2021-11-19 14:32:44,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1620 states to 1620 states and 2341 transitions. [2021-11-19 14:32:44,537 INFO L78 Accepts]: Start accepts. Automaton has 1620 states and 2341 transitions. Word has length 527 [2021-11-19 14:32:44,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:32:44,538 INFO L470 AbstractCegarLoop]: Abstraction has 1620 states and 2341 transitions. [2021-11-19 14:32:44,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 16.5) internal successors, (132), 6 states have internal predecessors, (132), 3 states have call successors, (61), 5 states have call predecessors, (61), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2021-11-19 14:32:44,539 INFO L276 IsEmpty]: Start isEmpty. Operand 1620 states and 2341 transitions. [2021-11-19 14:32:44,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 537 [2021-11-19 14:32:44,547 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:32:44,548 INFO L514 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:32:44,771 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forcibly destroying the process [2021-11-19 14:32:44,867 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 137 [2021-11-19 14:32:44,941 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-11-19 14:32:45,079 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (15)] Ended with exit code 0 [2021-11-19 14:32:45,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:32:45,268 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:32:45,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:32:45,268 INFO L85 PathProgramCache]: Analyzing trace with hash -384530604, now seen corresponding path program 1 times [2021-11-19 14:32:45,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:32:45,273 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1368828423] [2021-11-19 14:32:45,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:32:45,273 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:32:45,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:32:45,274 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:32:45,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-19 14:32:47,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:32:47,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 5011 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:32:47,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:32:50,638 INFO L134 CoverageAnalysis]: Checked inductivity of 6207 backedges. 304 proven. 1 refuted. 0 times theorem prover too weak. 5902 trivial. 0 not checked. [2021-11-19 14:32:50,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:32:52,699 INFO L134 CoverageAnalysis]: Checked inductivity of 6207 backedges. 0 proven. 267 refuted. 0 times theorem prover too weak. 5940 trivial. 0 not checked. [2021-11-19 14:32:52,699 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:32:52,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1368828423] [2021-11-19 14:32:52,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1368828423] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:32:52,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [926050430] [2021-11-19 14:32:52,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:32:52,700 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:32:52,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:32:52,701 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:32:52,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-19 14:32:54,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:32:54,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 5011 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-19 14:32:54,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:32:58,021 INFO L134 CoverageAnalysis]: Checked inductivity of 6207 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6201 trivial. 0 not checked. [2021-11-19 14:32:58,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:33:00,588 INFO L134 CoverageAnalysis]: Checked inductivity of 6207 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6203 trivial. 0 not checked. [2021-11-19 14:33:00,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [926050430] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:33:00,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162055630] [2021-11-19 14:33:00,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:33:00,589 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:33:00,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:33:00,590 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:33:00,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-19 14:33:10,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:33:11,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 5011 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:33:11,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:33:13,111 INFO L134 CoverageAnalysis]: Checked inductivity of 6207 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 6169 trivial. 0 not checked. [2021-11-19 14:33:13,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:33:14,388 INFO L134 CoverageAnalysis]: Checked inductivity of 6207 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 6184 trivial. 0 not checked. [2021-11-19 14:33:14,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162055630] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:33:14,388 INFO L186 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2021-11-19 14:33:14,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 5, 8, 8, 3] total 22 [2021-11-19 14:33:14,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430121494] [2021-11-19 14:33:14,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:33:14,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:33:14,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:33:14,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:33:14,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-11-19 14:33:14,393 INFO L87 Difference]: Start difference. First operand 1620 states and 2341 transitions. Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 2 states have call successors, (60), 2 states have call predecessors, (60), 2 states have return successors, (57), 2 states have call predecessors, (57), 2 states have call successors, (57) [2021-11-19 14:33:14,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:33:14,537 INFO L93 Difference]: Finished difference Result 3159 states and 4736 transitions. [2021-11-19 14:33:14,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:33:14,538 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 2 states have call successors, (60), 2 states have call predecessors, (60), 2 states have return successors, (57), 2 states have call predecessors, (57), 2 states have call successors, (57) Word has length 536 [2021-11-19 14:33:14,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:33:14,558 INFO L225 Difference]: With dead ends: 3159 [2021-11-19 14:33:14,558 INFO L226 Difference]: Without dead ends: 1644 [2021-11-19 14:33:14,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3210 GetRequests, 3190 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-11-19 14:33:14,573 INFO L933 BasicCegarLoop]: 1169 mSDtfsCounter, 2 mSDsluCounter, 1162 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 2331 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:33:14,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 2331 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:33:14,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1644 states. [2021-11-19 14:33:14,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1644 to 1628. [2021-11-19 14:33:14,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1628 states, 1167 states have (on average 1.374464438731791) internal successors, (1604), 1198 states have internal predecessors, (1604), 369 states have call successors, (369), 91 states have call predecessors, (369), 91 states have return successors, (376), 356 states have call predecessors, (376), 369 states have call successors, (376) [2021-11-19 14:33:14,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1628 states to 1628 states and 2349 transitions. [2021-11-19 14:33:14,741 INFO L78 Accepts]: Start accepts. Automaton has 1628 states and 2349 transitions. Word has length 536 [2021-11-19 14:33:14,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:33:14,742 INFO L470 AbstractCegarLoop]: Abstraction has 1628 states and 2349 transitions. [2021-11-19 14:33:14,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 2 states have call successors, (60), 2 states have call predecessors, (60), 2 states have return successors, (57), 2 states have call predecessors, (57), 2 states have call successors, (57) [2021-11-19 14:33:14,743 INFO L276 IsEmpty]: Start isEmpty. Operand 1628 states and 2349 transitions. [2021-11-19 14:33:14,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 561 [2021-11-19 14:33:14,752 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:33:14,752 INFO L514 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 8, 8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:33:14,774 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-11-19 14:33:15,175 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forcibly destroying the process [2021-11-19 14:33:15,325 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 137 [2021-11-19 14:33:15,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-19 14:33:15,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:33:15,526 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:33:15,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:33:15,526 INFO L85 PathProgramCache]: Analyzing trace with hash -506338988, now seen corresponding path program 1 times [2021-11-19 14:33:15,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:33:15,533 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1416630507] [2021-11-19 14:33:15,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:33:15,533 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:33:15,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:33:15,535 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:33:15,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-19 14:33:18,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:33:18,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 5043 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:33:18,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:33:21,780 INFO L134 CoverageAnalysis]: Checked inductivity of 6291 backedges. 304 proven. 1 refuted. 0 times theorem prover too weak. 5986 trivial. 0 not checked. [2021-11-19 14:33:21,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:33:24,035 INFO L134 CoverageAnalysis]: Checked inductivity of 6291 backedges. 0 proven. 267 refuted. 0 times theorem prover too weak. 6024 trivial. 0 not checked. [2021-11-19 14:33:24,036 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:33:24,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1416630507] [2021-11-19 14:33:24,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1416630507] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:33:24,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [653157099] [2021-11-19 14:33:24,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:33:24,037 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:33:24,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:33:24,038 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:33:24,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-19 14:33:26,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:33:26,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 5043 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-19 14:33:26,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:33:30,667 INFO L134 CoverageAnalysis]: Checked inductivity of 6291 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6285 trivial. 0 not checked. [2021-11-19 14:33:30,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:33:32,869 INFO L134 CoverageAnalysis]: Checked inductivity of 6291 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6287 trivial. 0 not checked. [2021-11-19 14:33:32,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [653157099] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:33:32,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86789005] [2021-11-19 14:33:32,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:33:32,869 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:33:32,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:33:32,870 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:33:32,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-19 14:33:41,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:33:43,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 5043 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:33:43,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:33:44,953 INFO L134 CoverageAnalysis]: Checked inductivity of 6291 backedges. 142 proven. 0 refuted. 0 times theorem prover too weak. 6149 trivial. 0 not checked. [2021-11-19 14:33:44,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:33:46,166 INFO L134 CoverageAnalysis]: Checked inductivity of 6291 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6289 trivial. 0 not checked. [2021-11-19 14:33:46,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86789005] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:33:46,166 INFO L186 FreeRefinementEngine]: Found 2 perfect and 4 imperfect interpolant sequences. [2021-11-19 14:33:46,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5, 8, 8] total 22 [2021-11-19 14:33:46,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448082051] [2021-11-19 14:33:46,168 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:33:46,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:33:46,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:33:46,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:33:46,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-11-19 14:33:46,173 INFO L87 Difference]: Start difference. First operand 1628 states and 2349 transitions. Second operand has 4 states, 4 states have (on average 37.75) internal successors, (151), 4 states have internal predecessors, (151), 2 states have call successors, (67), 2 states have call predecessors, (67), 2 states have return successors, (64), 2 states have call predecessors, (64), 2 states have call successors, (64) [2021-11-19 14:33:46,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:33:46,309 INFO L93 Difference]: Finished difference Result 3159 states and 4564 transitions. [2021-11-19 14:33:46,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:33:46,309 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.75) internal successors, (151), 4 states have internal predecessors, (151), 2 states have call successors, (67), 2 states have call predecessors, (67), 2 states have return successors, (64), 2 states have call predecessors, (64), 2 states have call successors, (64) Word has length 560 [2021-11-19 14:33:46,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:33:46,328 INFO L225 Difference]: With dead ends: 3159 [2021-11-19 14:33:46,328 INFO L226 Difference]: Without dead ends: 1636 [2021-11-19 14:33:46,339 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3354 GetRequests, 3334 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-11-19 14:33:46,340 INFO L933 BasicCegarLoop]: 1170 mSDtfsCounter, 2 mSDsluCounter, 2330 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 3500 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:33:46,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 3500 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:33:46,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1636 states. [2021-11-19 14:33:46,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1636 to 1636. [2021-11-19 14:33:46,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1636 states, 1173 states have (on average 1.3725490196078431) internal successors, (1610), 1204 states have internal predecessors, (1610), 371 states have call successors, (371), 91 states have call predecessors, (371), 91 states have return successors, (378), 358 states have call predecessors, (378), 371 states have call successors, (378) [2021-11-19 14:33:46,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1636 states to 1636 states and 2359 transitions. [2021-11-19 14:33:46,446 INFO L78 Accepts]: Start accepts. Automaton has 1636 states and 2359 transitions. Word has length 560 [2021-11-19 14:33:46,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:33:46,448 INFO L470 AbstractCegarLoop]: Abstraction has 1636 states and 2359 transitions. [2021-11-19 14:33:46,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.75) internal successors, (151), 4 states have internal predecessors, (151), 2 states have call successors, (67), 2 states have call predecessors, (67), 2 states have return successors, (64), 2 states have call predecessors, (64), 2 states have call successors, (64) [2021-11-19 14:33:46,448 INFO L276 IsEmpty]: Start isEmpty. Operand 1636 states and 2359 transitions. [2021-11-19 14:33:46,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 613 [2021-11-19 14:33:46,456 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:33:46,457 INFO L514 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 12, 12, 12, 12, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:33:46,670 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forcibly destroying the process [2021-11-19 14:33:46,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-19 14:33:46,786 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-19 14:33:46,931 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (21)] Ended with exit code 0 [2021-11-19 14:33:47,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:33:47,121 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:33:47,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:33:47,121 INFO L85 PathProgramCache]: Analyzing trace with hash -2004080672, now seen corresponding path program 1 times [2021-11-19 14:33:47,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:33:47,125 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1680509468] [2021-11-19 14:33:47,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:33:47,125 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:33:47,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:33:47,126 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:33:47,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-19 14:33:50,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:33:50,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 5131 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:33:50,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:33:53,446 INFO L134 CoverageAnalysis]: Checked inductivity of 6623 backedges. 304 proven. 1 refuted. 0 times theorem prover too weak. 6318 trivial. 0 not checked. [2021-11-19 14:33:53,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:33:55,767 INFO L134 CoverageAnalysis]: Checked inductivity of 6623 backedges. 0 proven. 267 refuted. 0 times theorem prover too weak. 6356 trivial. 0 not checked. [2021-11-19 14:33:55,767 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:33:55,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1680509468] [2021-11-19 14:33:55,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1680509468] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:33:55,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [486987146] [2021-11-19 14:33:55,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:33:55,768 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:33:55,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:33:55,769 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:33:55,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-19 14:33:58,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:33:58,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 5131 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-19 14:33:58,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:34:03,464 INFO L134 CoverageAnalysis]: Checked inductivity of 6623 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6617 trivial. 0 not checked. [2021-11-19 14:34:03,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:34:05,945 INFO L134 CoverageAnalysis]: Checked inductivity of 6623 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6619 trivial. 0 not checked. [2021-11-19 14:34:05,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [486987146] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:34:05,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568911729] [2021-11-19 14:34:05,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:34:05,946 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:34:05,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:34:05,947 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:34:05,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-19 14:34:16,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:34:18,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 5131 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-19 14:34:18,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:34:20,091 INFO L134 CoverageAnalysis]: Checked inductivity of 6623 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6617 trivial. 0 not checked. [2021-11-19 14:34:20,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:34:21,452 INFO L134 CoverageAnalysis]: Checked inductivity of 6623 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6619 trivial. 0 not checked. [2021-11-19 14:34:21,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568911729] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:34:21,452 INFO L186 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2021-11-19 14:34:21,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5, 5, 8, 8, 8] total 20 [2021-11-19 14:34:21,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691368393] [2021-11-19 14:34:21,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:34:21,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:34:21,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:34:21,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:34:21,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-11-19 14:34:21,455 INFO L87 Difference]: Start difference. First operand 1636 states and 2359 transitions. Second operand has 8 states, 8 states have (on average 18.0) internal successors, (144), 7 states have internal predecessors, (144), 2 states have call successors, (62), 2 states have call predecessors, (62), 3 states have return successors, (59), 3 states have call predecessors, (59), 2 states have call successors, (59) [2021-11-19 14:34:24,604 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:34:26,647 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:34:28,725 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:34:30,799 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:34:33,807 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:34:36,048 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:34:39,175 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:34:41,602 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:34:41,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:34:41,827 INFO L93 Difference]: Finished difference Result 3221 states and 4631 transitions. [2021-11-19 14:34:41,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-19 14:34:41,831 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 18.0) internal successors, (144), 7 states have internal predecessors, (144), 2 states have call successors, (62), 2 states have call predecessors, (62), 3 states have return successors, (59), 3 states have call predecessors, (59), 2 states have call successors, (59) Word has length 612 [2021-11-19 14:34:41,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:34:41,850 INFO L225 Difference]: With dead ends: 3221 [2021-11-19 14:34:41,851 INFO L226 Difference]: Without dead ends: 1670 [2021-11-19 14:34:41,862 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3673 GetRequests, 3648 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2021-11-19 14:34:41,863 INFO L933 BasicCegarLoop]: 1168 mSDtfsCounter, 194 mSDsluCounter, 6762 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 5 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 7930 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:34:41,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 7930 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 124 Invalid, 7 Unknown, 0 Unchecked, 19.4s Time] [2021-11-19 14:34:41,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1670 states. [2021-11-19 14:34:41,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1670 to 1662. [2021-11-19 14:34:41,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1662 states, 1195 states have (on average 1.3690376569037657) internal successors, (1636), 1227 states have internal predecessors, (1636), 373 states have call successors, (373), 93 states have call predecessors, (373), 93 states have return successors, (380), 359 states have call predecessors, (380), 373 states have call successors, (380) [2021-11-19 14:34:41,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1662 states to 1662 states and 2389 transitions. [2021-11-19 14:34:41,969 INFO L78 Accepts]: Start accepts. Automaton has 1662 states and 2389 transitions. Word has length 612 [2021-11-19 14:34:41,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:34:41,970 INFO L470 AbstractCegarLoop]: Abstraction has 1662 states and 2389 transitions. [2021-11-19 14:34:41,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.0) internal successors, (144), 7 states have internal predecessors, (144), 2 states have call successors, (62), 2 states have call predecessors, (62), 3 states have return successors, (59), 3 states have call predecessors, (59), 2 states have call successors, (59) [2021-11-19 14:34:41,971 INFO L276 IsEmpty]: Start isEmpty. Operand 1662 states and 2389 transitions. [2021-11-19 14:34:41,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 619 [2021-11-19 14:34:41,979 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:34:41,980 INFO L514 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 12, 12, 12, 12, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:34:41,999 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-11-19 14:34:42,399 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forcibly destroying the process [2021-11-19 14:34:42,458 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-19 14:34:42,538 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-19 14:34:42,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:34:42,663 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:34:42,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:34:42,664 INFO L85 PathProgramCache]: Analyzing trace with hash 565021459, now seen corresponding path program 1 times [2021-11-19 14:34:42,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:34:42,668 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [245652709] [2021-11-19 14:34:42,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:34:42,669 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:34:42,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:34:42,670 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:34:42,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-19 14:34:45,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:34:45,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 5146 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:34:45,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:34:48,713 INFO L134 CoverageAnalysis]: Checked inductivity of 6639 backedges. 320 proven. 1 refuted. 0 times theorem prover too weak. 6318 trivial. 0 not checked. [2021-11-19 14:34:48,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:34:50,990 INFO L134 CoverageAnalysis]: Checked inductivity of 6639 backedges. 0 proven. 267 refuted. 0 times theorem prover too weak. 6372 trivial. 0 not checked. [2021-11-19 14:34:50,991 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:34:50,991 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [245652709] [2021-11-19 14:34:50,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [245652709] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:34:50,991 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [899024789] [2021-11-19 14:34:50,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:34:50,992 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:34:50,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:34:51,000 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:34:51,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-11-19 14:34:53,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:34:53,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 5146 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-19 14:34:53,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:34:55,370 INFO L134 CoverageAnalysis]: Checked inductivity of 6639 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6635 trivial. 0 not checked. [2021-11-19 14:34:55,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:34:57,848 INFO L134 CoverageAnalysis]: Checked inductivity of 6639 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6635 trivial. 0 not checked. [2021-11-19 14:34:57,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [899024789] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:34:57,848 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:34:57,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [5, 5] total 18 [2021-11-19 14:34:57,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318377022] [2021-11-19 14:34:57,849 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:34:57,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:34:57,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:34:57,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:34:57,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-11-19 14:34:57,851 INFO L87 Difference]: Start difference. First operand 1662 states and 2389 transitions. Second operand has 12 states, 12 states have (on average 13.5) internal successors, (162), 8 states have internal predecessors, (162), 2 states have call successors, (73), 2 states have call predecessors, (73), 6 states have return successors, (72), 6 states have call predecessors, (72), 2 states have call successors, (72) [2021-11-19 14:34:58,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:34:58,081 INFO L93 Difference]: Finished difference Result 3207 states and 4614 transitions. [2021-11-19 14:34:58,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:34:58,086 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 13.5) internal successors, (162), 8 states have internal predecessors, (162), 2 states have call successors, (73), 2 states have call predecessors, (73), 6 states have return successors, (72), 6 states have call predecessors, (72), 2 states have call successors, (72) Word has length 618 [2021-11-19 14:34:58,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:34:58,101 INFO L225 Difference]: With dead ends: 3207 [2021-11-19 14:34:58,101 INFO L226 Difference]: Without dead ends: 1672 [2021-11-19 14:34:58,109 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2468 GetRequests, 2452 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-11-19 14:34:58,110 INFO L933 BasicCegarLoop]: 1170 mSDtfsCounter, 0 mSDsluCounter, 9352 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 10522 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:34:58,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 10522 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:34:58,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1672 states. [2021-11-19 14:34:58,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1672 to 1672. [2021-11-19 14:34:58,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1672 states, 1201 states have (on average 1.3671940049958369) internal successors, (1642), 1235 states have internal predecessors, (1642), 373 states have call successors, (373), 93 states have call predecessors, (373), 97 states have return successors, (384), 361 states have call predecessors, (384), 373 states have call successors, (384) [2021-11-19 14:34:58,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1672 states to 1672 states and 2399 transitions. [2021-11-19 14:34:58,232 INFO L78 Accepts]: Start accepts. Automaton has 1672 states and 2399 transitions. Word has length 618 [2021-11-19 14:34:58,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:34:58,233 INFO L470 AbstractCegarLoop]: Abstraction has 1672 states and 2399 transitions. [2021-11-19 14:34:58,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 13.5) internal successors, (162), 8 states have internal predecessors, (162), 2 states have call successors, (73), 2 states have call predecessors, (73), 6 states have return successors, (72), 6 states have call predecessors, (72), 2 states have call successors, (72) [2021-11-19 14:34:58,234 INFO L276 IsEmpty]: Start isEmpty. Operand 1672 states and 2399 transitions. [2021-11-19 14:34:58,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 625 [2021-11-19 14:34:58,241 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:34:58,242 INFO L514 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 12, 12, 12, 12, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:34:58,264 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2021-11-19 14:34:58,522 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-19 14:34:58,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:34:58,657 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:34:58,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:34:58,658 INFO L85 PathProgramCache]: Analyzing trace with hash 2088012416, now seen corresponding path program 1 times [2021-11-19 14:34:58,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:34:58,661 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1196846789] [2021-11-19 14:34:58,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:34:58,661 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:34:58,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:34:58,662 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:34:58,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-19 14:35:00,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:35:01,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 5161 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:35:01,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:35:03,727 INFO L134 CoverageAnalysis]: Checked inductivity of 6661 backedges. 336 proven. 1 refuted. 0 times theorem prover too weak. 6324 trivial. 0 not checked. [2021-11-19 14:35:03,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:35:05,597 INFO L134 CoverageAnalysis]: Checked inductivity of 6661 backedges. 0 proven. 267 refuted. 0 times theorem prover too weak. 6394 trivial. 0 not checked. [2021-11-19 14:35:05,597 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:35:05,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1196846789] [2021-11-19 14:35:05,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1196846789] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:35:05,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1797033780] [2021-11-19 14:35:05,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:35:05,598 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:35:05,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:35:05,599 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:35:05,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-11-19 14:35:12,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:35:13,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 5161 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:35:13,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:35:16,315 INFO L134 CoverageAnalysis]: Checked inductivity of 6661 backedges. 336 proven. 1 refuted. 0 times theorem prover too weak. 6324 trivial. 0 not checked. [2021-11-19 14:35:16,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:35:18,353 INFO L134 CoverageAnalysis]: Checked inductivity of 6661 backedges. 0 proven. 267 refuted. 0 times theorem prover too weak. 6394 trivial. 0 not checked. [2021-11-19 14:35:18,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1797033780] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:35:18,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437667219] [2021-11-19 14:35:18,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:35:18,354 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:35:18,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:35:18,355 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:35:18,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-19 14:35:32,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:35:33,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 5161 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:35:33,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:35:36,210 INFO L134 CoverageAnalysis]: Checked inductivity of 6661 backedges. 336 proven. 1 refuted. 0 times theorem prover too weak. 6324 trivial. 0 not checked. [2021-11-19 14:35:36,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:35:37,871 INFO L134 CoverageAnalysis]: Checked inductivity of 6661 backedges. 0 proven. 267 refuted. 0 times theorem prover too weak. 6394 trivial. 0 not checked. [2021-11-19 14:35:37,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437667219] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:35:37,871 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:35:37,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2021-11-19 14:35:37,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766763734] [2021-11-19 14:35:37,872 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:35:37,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:35:37,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:35:37,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:35:37,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:35:37,879 INFO L87 Difference]: Start difference. First operand 1672 states and 2399 transitions. Second operand has 8 states, 8 states have (on average 22.75) internal successors, (182), 8 states have internal predecessors, (182), 2 states have call successors, (116), 2 states have call predecessors, (116), 4 states have return successors, (114), 2 states have call predecessors, (114), 2 states have call successors, (114) [2021-11-19 14:35:38,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:35:38,976 INFO L93 Difference]: Finished difference Result 3331 states and 4859 transitions. [2021-11-19 14:35:38,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:35:38,977 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 22.75) internal successors, (182), 8 states have internal predecessors, (182), 2 states have call successors, (116), 2 states have call predecessors, (116), 4 states have return successors, (114), 2 states have call predecessors, (114), 2 states have call successors, (114) Word has length 624 [2021-11-19 14:35:38,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:35:38,994 INFO L225 Difference]: With dead ends: 3331 [2021-11-19 14:35:38,994 INFO L226 Difference]: Without dead ends: 1675 [2021-11-19 14:35:39,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3740 GetRequests, 3732 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:35:39,050 INFO L933 BasicCegarLoop]: 1169 mSDtfsCounter, 13 mSDsluCounter, 2264 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 3433 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:35:39,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 3433 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 14:35:39,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1675 states. [2021-11-19 14:35:39,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1675 to 1675. [2021-11-19 14:35:39,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1675 states, 1204 states have (on average 1.3662790697674418) internal successors, (1645), 1238 states have internal predecessors, (1645), 373 states have call successors, (373), 93 states have call predecessors, (373), 97 states have return successors, (384), 361 states have call predecessors, (384), 373 states have call successors, (384) [2021-11-19 14:35:39,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1675 states to 1675 states and 2402 transitions. [2021-11-19 14:35:39,151 INFO L78 Accepts]: Start accepts. Automaton has 1675 states and 2402 transitions. Word has length 624 [2021-11-19 14:35:39,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:35:39,152 INFO L470 AbstractCegarLoop]: Abstraction has 1675 states and 2402 transitions. [2021-11-19 14:35:39,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 22.75) internal successors, (182), 8 states have internal predecessors, (182), 2 states have call successors, (116), 2 states have call predecessors, (116), 4 states have return successors, (114), 2 states have call predecessors, (114), 2 states have call successors, (114) [2021-11-19 14:35:39,152 INFO L276 IsEmpty]: Start isEmpty. Operand 1675 states and 2402 transitions. [2021-11-19 14:35:39,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 742 [2021-11-19 14:35:39,170 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:35:39,171 INFO L514 BasicCegarLoop]: trace histogram [156, 39, 39, 39, 39, 12, 12, 12, 12, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:35:39,272 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-19 14:35:39,392 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (29)] Ended with exit code 0 [2021-11-19 14:35:39,772 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forcibly destroying the process [2021-11-19 14:35:39,814 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-19 14:35:39,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:35:39,815 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:35:39,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:35:39,815 INFO L85 PathProgramCache]: Analyzing trace with hash 2068283006, now seen corresponding path program 2 times [2021-11-19 14:35:39,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:35:39,819 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1289040122] [2021-11-19 14:35:39,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:35:39,820 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:35:39,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:35:39,820 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:35:39,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-19 14:36:44,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 14:36:44,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:36:45,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 5746 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:36:45,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:36:46,993 INFO L134 CoverageAnalysis]: Checked inductivity of 22573 backedges. 282 proven. 5 refuted. 0 times theorem prover too weak. 22286 trivial. 0 not checked. [2021-11-19 14:36:46,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:36:48,952 INFO L134 CoverageAnalysis]: Checked inductivity of 22573 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 22566 trivial. 0 not checked. [2021-11-19 14:36:48,953 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:36:48,953 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1289040122] [2021-11-19 14:36:48,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1289040122] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:36:48,953 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [657498700] [2021-11-19 14:36:48,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:36:48,954 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:36:48,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:36:48,960 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:36:48,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2021-11-19 14:38:49,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 14:38:49,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:38:49,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 5746 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:38:49,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:38:51,449 INFO L134 CoverageAnalysis]: Checked inductivity of 22573 backedges. 282 proven. 5 refuted. 0 times theorem prover too weak. 22286 trivial. 0 not checked. [2021-11-19 14:38:51,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:38:52,864 INFO L134 CoverageAnalysis]: Checked inductivity of 22573 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 22566 trivial. 0 not checked. [2021-11-19 14:38:52,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [657498700] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:38:52,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558041429] [2021-11-19 14:38:52,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:38:52,865 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:38:52,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:38:52,866 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:38:52,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-19 14:40:56,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 14:40:56,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:40:57,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 5746 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:40:57,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:40:58,901 INFO L134 CoverageAnalysis]: Checked inductivity of 22573 backedges. 282 proven. 5 refuted. 0 times theorem prover too weak. 22286 trivial. 0 not checked. [2021-11-19 14:40:58,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:41:00,140 INFO L134 CoverageAnalysis]: Checked inductivity of 22573 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 22566 trivial. 0 not checked. [2021-11-19 14:41:00,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558041429] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:41:00,140 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:41:00,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2021-11-19 14:41:00,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246683438] [2021-11-19 14:41:00,142 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:41:00,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:41:00,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:41:00,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:41:00,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:41:00,145 INFO L87 Difference]: Start difference. First operand 1675 states and 2402 transitions. Second operand has 8 states, 8 states have (on average 20.0) internal successors, (160), 8 states have internal predecessors, (160), 6 states have call successors, (72), 2 states have call predecessors, (72), 2 states have return successors, (69), 6 states have call predecessors, (69), 6 states have call successors, (69) [2021-11-19 14:41:00,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:41:00,543 INFO L93 Difference]: Finished difference Result 3240 states and 4661 transitions. [2021-11-19 14:41:00,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:41:00,544 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 20.0) internal successors, (160), 8 states have internal predecessors, (160), 6 states have call successors, (72), 2 states have call predecessors, (72), 2 states have return successors, (69), 6 states have call predecessors, (69), 6 states have call successors, (69) Word has length 741 [2021-11-19 14:41:00,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:41:00,559 INFO L225 Difference]: With dead ends: 3240 [2021-11-19 14:41:00,559 INFO L226 Difference]: Without dead ends: 1699 [2021-11-19 14:41:00,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4442 GetRequests, 4434 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:41:00,568 INFO L933 BasicCegarLoop]: 1176 mSDtfsCounter, 7 mSDsluCounter, 3501 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 4677 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:41:00,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 4677 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:41:00,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1699 states. [2021-11-19 14:41:00,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1699 to 1699. [2021-11-19 14:41:00,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1699 states, 1220 states have (on average 1.3614754098360655) internal successors, (1661), 1254 states have internal predecessors, (1661), 381 states have call successors, (381), 93 states have call predecessors, (381), 97 states have return successors, (392), 369 states have call predecessors, (392), 381 states have call successors, (392) [2021-11-19 14:41:00,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1699 states to 1699 states and 2434 transitions. [2021-11-19 14:41:00,698 INFO L78 Accepts]: Start accepts. Automaton has 1699 states and 2434 transitions. Word has length 741 [2021-11-19 14:41:00,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:41:00,699 INFO L470 AbstractCegarLoop]: Abstraction has 1699 states and 2434 transitions. [2021-11-19 14:41:00,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.0) internal successors, (160), 8 states have internal predecessors, (160), 6 states have call successors, (72), 2 states have call predecessors, (72), 2 states have return successors, (69), 6 states have call predecessors, (69), 6 states have call successors, (69) [2021-11-19 14:41:00,699 INFO L276 IsEmpty]: Start isEmpty. Operand 1699 states and 2434 transitions. [2021-11-19 14:41:00,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 846 [2021-11-19 14:41:00,710 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:41:00,711 INFO L514 BasicCegarLoop]: trace histogram [156, 39, 39, 39, 39, 20, 20, 20, 20, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:41:00,935 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forcibly destroying the process [2021-11-19 14:41:01,025 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 137 [2021-11-19 14:41:01,091 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2021-11-19 14:41:01,326 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (31)] Ended with exit code 0 [2021-11-19 14:41:01,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:41:01,426 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_lenErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:41:01,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:41:01,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1251335062, now seen corresponding path program 3 times [2021-11-19 14:41:01,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:41:01,430 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [584719858] [2021-11-19 14:41:01,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 14:41:01,430 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:41:01,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:41:01,431 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:41:01,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc3b2acc-46d3-40e9-a764-d753d61e02ac/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process