./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-2b9ec6c-1-106_1a-drivers--usb--gadget--g_printer.ko-entry_point_ldv-val-v0.8.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-2b9ec6c-1-106_1a-drivers--usb--gadget--g_printer.ko-entry_point_ldv-val-v0.8.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF --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 bf5e73d985bafa5e008f16fba6fb54da90c4b127699bd918a748611ea9b79793 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:23:36,298 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:23:36,300 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:23:36,332 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:23:36,333 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:23:36,334 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:23:36,336 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:23:36,338 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:23:36,341 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:23:36,342 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:23:36,343 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:23:36,345 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:23:36,345 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:23:36,347 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:23:36,349 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:23:36,350 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:23:36,352 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:23:36,353 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:23:36,355 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:23:36,358 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:23:36,360 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:23:36,362 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:23:36,364 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:23:36,365 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:23:36,369 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:23:36,369 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:23:36,370 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:23:36,371 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:23:36,372 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:23:36,373 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:23:36,373 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:23:36,374 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:23:36,375 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:23:36,376 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:23:36,377 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:23:36,378 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:23:36,378 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:23:36,379 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:23:36,379 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:23:36,380 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:23:36,381 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:23:36,384 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-12 22:23:36,410 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:23:36,411 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:23:36,412 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:23:36,412 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:23:36,412 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:23:36,412 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:23:36,413 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:23:36,413 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 22:23:36,413 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:23:36,413 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:23:36,414 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 22:23:36,414 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 22:23:36,414 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:23:36,414 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 22:23:36,415 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 22:23:36,415 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 22:23:36,416 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:23:36,416 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 22:23:36,416 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:23:36,416 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:23:36,416 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:23:36,417 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:23:36,417 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:23:36,417 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:23:36,417 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:23:36,418 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:23:36,418 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:23:36,418 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:23:36,418 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:23:36,419 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:23:36,419 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:23:36,419 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:23:36,419 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 22:23:36,420 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 22:23:36,420 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:23:36,420 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:23:36,420 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:23:36,421 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_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bf5e73d985bafa5e008f16fba6fb54da90c4b127699bd918a748611ea9b79793 [2021-11-12 22:23:36,727 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:23:36,749 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:23:36,752 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:23:36,753 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:23:36,754 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:23:36,755 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-2b9ec6c-1-106_1a-drivers--usb--gadget--g_printer.ko-entry_point_ldv-val-v0.8.cil.out.i [2021-11-12 22:23:36,826 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/data/84b568890/b5b03c03e7514364b649d4273bbd5c8a/FLAG90eb80387 [2021-11-12 22:23:37,692 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:23:37,694 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-2b9ec6c-1-106_1a-drivers--usb--gadget--g_printer.ko-entry_point_ldv-val-v0.8.cil.out.i [2021-11-12 22:23:37,751 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/data/84b568890/b5b03c03e7514364b649d4273bbd5c8a/FLAG90eb80387 [2021-11-12 22:23:38,229 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/data/84b568890/b5b03c03e7514364b649d4273bbd5c8a [2021-11-12 22:23:38,232 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:23:38,233 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:23:38,235 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:23:38,235 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:23:38,239 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:23:38,240 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:23:38" (1/1) ... [2021-11-12 22:23:38,241 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c04abb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:23:38, skipping insertion in model container [2021-11-12 22:23:38,241 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:23:38" (1/1) ... [2021-11-12 22:23:38,249 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:23:38,346 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:23:39,083 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:23:39,193 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:23:39,315 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:23:39,327 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:23:39,342 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:23:39,342 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:23:39,349 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:23:39,358 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:23:39,392 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:23:39,393 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:23:39,395 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:23:39,407 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:23:39,435 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:23:39,443 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:23:39,449 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:23:39,467 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:23:39,472 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:23:39,478 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:23:39,485 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:23:39,495 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:23:39,501 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:23:39,511 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:23:39,518 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:23:39,524 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:23:39,547 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:23:39,562 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:23:39,564 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:23:39,565 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:23:39,572 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:23:39,595 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:23:39,609 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:23:39,613 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:23:39,618 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:23:39,619 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:23:39,677 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:23:39,679 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:23:39,685 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:23:39,712 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:23:39,713 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:23:39,713 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:23:39,717 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:23:39,731 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:23:39,734 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:23:39,743 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:23:39,792 WARN L228 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_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-2b9ec6c-1-106_1a-drivers--usb--gadget--g_printer.ko-entry_point_ldv-val-v0.8.cil.out.i[158797,158810] [2021-11-12 22:23:39,825 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:23:39,864 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) [2021-11-12 22:23:39,865 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@68154a16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:23:39, skipping insertion in model container [2021-11-12 22:23:39,865 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:23:39,865 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 22:23:39,867 INFO L158 Benchmark]: Toolchain (without parser) took 1632.74ms. Allocated memory is still 102.8MB. Free memory was 79.1MB in the beginning and 62.7MB in the end (delta: 16.4MB). Peak memory consumption was 48.6MB. Max. memory is 16.1GB. [2021-11-12 22:23:39,867 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 102.8MB. Free memory is still 81.0MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 22:23:39,868 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1630.12ms. Allocated memory is still 102.8MB. Free memory was 79.1MB in the beginning and 62.7MB in the end (delta: 16.4MB). Peak memory consumption was 48.6MB. Max. memory is 16.1GB. [2021-11-12 22:23:39,870 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 102.8MB. Free memory is still 81.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1630.12ms. Allocated memory is still 102.8MB. Free memory was 79.1MB in the beginning and 62.7MB in the end (delta: 16.4MB). Peak memory consumption was 48.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 2825]: 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_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-2b9ec6c-1-106_1a-drivers--usb--gadget--g_printer.ko-entry_point_ldv-val-v0.8.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF --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 bf5e73d985bafa5e008f16fba6fb54da90c4b127699bd918a748611ea9b79793 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:23:42,261 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:23:42,264 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:23:42,325 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:23:42,326 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:23:42,331 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:23:42,333 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:23:42,337 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:23:42,340 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:23:42,348 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:23:42,350 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:23:42,352 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:23:42,353 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:23:42,355 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:23:42,358 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:23:42,364 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:23:42,366 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:23:42,367 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:23:42,369 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:23:42,379 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:23:42,381 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:23:42,383 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:23:42,386 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:23:42,388 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:23:42,401 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:23:42,402 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:23:42,402 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:23:42,404 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:23:42,405 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:23:42,406 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:23:42,407 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:23:42,407 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:23:42,410 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:23:42,410 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:23:42,412 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:23:42,412 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:23:42,413 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:23:42,414 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:23:42,414 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:23:42,416 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:23:42,417 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:23:42,422 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-12 22:23:42,458 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:23:42,458 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:23:42,459 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:23:42,460 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:23:42,460 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:23:42,460 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:23:42,460 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:23:42,460 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:23:42,461 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:23:42,461 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:23:42,462 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:23:42,462 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:23:42,462 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:23:42,462 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:23:42,462 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:23:42,462 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:23:42,463 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 22:23:42,463 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 22:23:42,463 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:23:42,463 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:23:42,463 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:23:42,464 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:23:42,464 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 22:23:42,464 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:23:42,464 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:23:42,465 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:23:42,465 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:23:42,465 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:23:42,465 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 22:23:42,465 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 22:23:42,465 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:23:42,466 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:23:42,466 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:23:42,466 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_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bf5e73d985bafa5e008f16fba6fb54da90c4b127699bd918a748611ea9b79793 [2021-11-12 22:23:42,871 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:23:42,899 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:23:42,902 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:23:42,903 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:23:42,905 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:23:42,906 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-2b9ec6c-1-106_1a-drivers--usb--gadget--g_printer.ko-entry_point_ldv-val-v0.8.cil.out.i [2021-11-12 22:23:42,980 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/data/d19b8412d/9410ca18cca348d8aa37ae6c45cdd844/FLAG78d4831b6 [2021-11-12 22:23:43,999 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:23:44,000 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-2b9ec6c-1-106_1a-drivers--usb--gadget--g_printer.ko-entry_point_ldv-val-v0.8.cil.out.i [2021-11-12 22:23:44,053 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/data/d19b8412d/9410ca18cca348d8aa37ae6c45cdd844/FLAG78d4831b6 [2021-11-12 22:23:44,419 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/data/d19b8412d/9410ca18cca348d8aa37ae6c45cdd844 [2021-11-12 22:23:44,421 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:23:44,422 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:23:44,424 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:23:44,424 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:23:44,428 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:23:44,429 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:23:44" (1/1) ... [2021-11-12 22:23:44,430 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2122cf8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:23:44, skipping insertion in model container [2021-11-12 22:23:44,430 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:23:44" (1/1) ... [2021-11-12 22:23:44,439 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:23:44,569 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:23:45,678 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:23:46,058 WARN L228 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_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-2b9ec6c-1-106_1a-drivers--usb--gadget--g_printer.ko-entry_point_ldv-val-v0.8.cil.out.i[158797,158810] [2021-11-12 22:23:46,098 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:23:46,162 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 22:23:46,234 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:23:46,564 WARN L228 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_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-2b9ec6c-1-106_1a-drivers--usb--gadget--g_printer.ko-entry_point_ldv-val-v0.8.cil.out.i[158797,158810] [2021-11-12 22:23:46,583 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:23:46,624 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 22:23:46,935 WARN L228 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_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-2b9ec6c-1-106_1a-drivers--usb--gadget--g_printer.ko-entry_point_ldv-val-v0.8.cil.out.i[158797,158810] [2021-11-12 22:23:46,946 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:23:47,067 INFO L208 MainTranslator]: Completed translation [2021-11-12 22:23:47,068 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:23:47 WrapperNode [2021-11-12 22:23:47,068 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:23:47,070 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 22:23:47,070 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 22:23:47,070 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 22:23:47,078 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:23:47" (1/1) ... [2021-11-12 22:23:47,214 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:23:47" (1/1) ... [2021-11-12 22:23:47,353 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 22:23:47,353 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 22:23:47,354 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 22:23:47,354 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 22:23:47,363 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:23:47" (1/1) ... [2021-11-12 22:23:47,364 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:23:47" (1/1) ... [2021-11-12 22:23:47,386 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:23:47" (1/1) ... [2021-11-12 22:23:47,386 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:23:47" (1/1) ... [2021-11-12 22:23:47,528 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:23:47" (1/1) ... [2021-11-12 22:23:47,559 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:23:47" (1/1) ... [2021-11-12 22:23:47,587 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:23:47" (1/1) ... [2021-11-12 22:23:47,618 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 22:23:47,619 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 22:23:47,620 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 22:23:47,620 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 22:23:47,621 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:23:47" (1/1) ... [2021-11-12 22:23:47,628 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:23:47,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:23:47,653 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 22:23:47,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 22:23:47,708 INFO L130 BoogieDeclarations]: Found specification of procedure printer_req_free [2021-11-12 22:23:47,709 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_req_free [2021-11-12 22:23:47,709 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int_nonpositive [2021-11-12 22:23:47,709 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int_nonpositive [2021-11-12 22:23:47,710 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-12 22:23:47,710 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-12 22:23:47,710 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-12 22:23:47,710 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-12 22:23:47,710 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-12 22:23:47,711 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-12 22:23:47,711 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-12 22:23:47,711 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-12 22:23:47,711 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-12 22:23:47,712 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-12 22:23:47,712 INFO L130 BoogieDeclarations]: Found specification of procedure get_gadget_data [2021-11-12 22:23:47,712 INFO L138 BoogieDeclarations]: Found implementation of procedure get_gadget_data [2021-11-12 22:23:47,712 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_free_request [2021-11-12 22:23:47,713 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_free_request [2021-11-12 22:23:47,713 INFO L130 BoogieDeclarations]: Found specification of procedure printer_reset_interface [2021-11-12 22:23:47,713 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_reset_interface [2021-11-12 22:23:47,713 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2021-11-12 22:23:47,713 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2021-11-12 22:23:47,714 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-12 22:23:47,714 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-12 22:23:47,714 INFO L130 BoogieDeclarations]: Found specification of procedure printer_soft_reset [2021-11-12 22:23:47,714 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_soft_reset [2021-11-12 22:23:47,714 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_unregister_class [2021-11-12 22:23:47,715 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_unregister_class [2021-11-12 22:23:47,715 INFO L130 BoogieDeclarations]: Found specification of procedure list_del_init [2021-11-12 22:23:47,715 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del_init [2021-11-12 22:23:47,715 INFO L130 BoogieDeclarations]: Found specification of procedure setup_rx_reqs [2021-11-12 22:23:47,716 INFO L138 BoogieDeclarations]: Found implementation of procedure setup_rx_reqs [2021-11-12 22:23:47,716 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-11-12 22:23:47,716 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-11-12 22:23:47,716 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-12 22:23:47,716 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-12 22:23:47,717 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-12 22:23:47,717 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-12 22:23:47,717 INFO L130 BoogieDeclarations]: Found specification of procedure usb_gadget_vbus_draw [2021-11-12 22:23:47,717 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_gadget_vbus_draw [2021-11-12 22:23:47,717 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-12 22:23:47,718 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-12 22:23:47,718 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-11-12 22:23:47,718 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-11-12 22:23:47,718 INFO L130 BoogieDeclarations]: Found specification of procedure poll_wait [2021-11-12 22:23:47,718 INFO L138 BoogieDeclarations]: Found implementation of procedure poll_wait [2021-11-12 22:23:47,719 INFO L130 BoogieDeclarations]: Found specification of procedure printer_fsync [2021-11-12 22:23:47,719 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_fsync [2021-11-12 22:23:47,719 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 22:23:47,719 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2021-11-12 22:23:47,720 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2021-11-12 22:23:47,720 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-12 22:23:47,720 INFO L130 BoogieDeclarations]: Found specification of procedure printer_open [2021-11-12 22:23:47,720 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_open [2021-11-12 22:23:47,720 INFO L130 BoogieDeclarations]: Found specification of procedure printer_bind [2021-11-12 22:23:47,721 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_bind [2021-11-12 22:23:47,721 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2021-11-12 22:23:47,721 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2021-11-12 22:23:47,721 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-11-12 22:23:47,759 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-11-12 22:23:47,759 INFO L130 BoogieDeclarations]: Found specification of procedure signal_pending [2021-11-12 22:23:47,759 INFO L138 BoogieDeclarations]: Found implementation of procedure signal_pending [2021-11-12 22:23:47,759 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-11-12 22:23:47,759 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-11-12 22:23:47,759 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-12 22:23:47,760 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-12 22:23:47,760 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-12 22:23:47,760 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-12 22:23:47,760 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-12 22:23:47,760 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-12 22:23:47,760 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2021-11-12 22:23:47,760 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2021-11-12 22:23:47,760 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2021-11-12 22:23:47,760 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 22:23:47,761 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-12 22:23:47,761 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-12 22:23:47,761 INFO L130 BoogieDeclarations]: Found specification of procedure list_del [2021-11-12 22:23:47,761 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del [2021-11-12 22:23:47,761 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_chrdev_region [2021-11-12 22:23:47,761 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_chrdev_region [2021-11-12 22:23:47,761 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-11-12 22:23:47,761 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-11-12 22:23:47,762 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2021-11-12 22:23:47,762 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2021-11-12 22:23:47,762 INFO L130 BoogieDeclarations]: Found specification of procedure printer_req_alloc [2021-11-12 22:23:47,762 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_req_alloc [2021-11-12 22:23:47,762 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2021-11-12 22:23:47,762 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2021-11-12 22:23:47,762 INFO L130 BoogieDeclarations]: Found specification of procedure schedule [2021-11-12 22:23:47,762 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule [2021-11-12 22:23:47,762 INFO L130 BoogieDeclarations]: Found specification of procedure list_empty [2021-11-12 22:23:47,762 INFO L138 BoogieDeclarations]: Found implementation of procedure list_empty [2021-11-12 22:23:47,763 INFO L130 BoogieDeclarations]: Found specification of procedure printer_poll [2021-11-12 22:23:47,763 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_poll [2021-11-12 22:23:47,763 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-12 22:23:47,763 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-12 22:23:47,763 INFO L130 BoogieDeclarations]: Found specification of procedure set_printer_interface [2021-11-12 22:23:47,763 INFO L138 BoogieDeclarations]: Found implementation of procedure set_printer_interface [2021-11-12 22:23:47,763 INFO L130 BoogieDeclarations]: Found specification of procedure class_destroy [2021-11-12 22:23:47,763 INFO L138 BoogieDeclarations]: Found implementation of procedure class_destroy [2021-11-12 22:23:47,763 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_queue [2021-11-12 22:23:47,764 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_queue [2021-11-12 22:23:47,764 INFO L130 BoogieDeclarations]: Found specification of procedure set_interface [2021-11-12 22:23:47,764 INFO L138 BoogieDeclarations]: Found implementation of procedure set_interface [2021-11-12 22:23:47,764 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-12 22:23:47,764 INFO L130 BoogieDeclarations]: Found specification of procedure printer_setup_complete [2021-11-12 22:23:47,764 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_setup_complete [2021-11-12 22:23:47,764 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2021-11-12 22:23:47,764 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-12 22:23:47,764 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2021-11-12 22:23:47,765 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~C_INT [2021-11-12 22:23:47,765 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~C_INT [2021-11-12 22:23:47,765 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-12 22:23:47,765 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-12 22:23:47,765 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2021-11-12 22:23:47,765 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2021-11-12 22:23:47,765 INFO L130 BoogieDeclarations]: Found specification of procedure printer_write [2021-11-12 22:23:47,765 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_write [2021-11-12 22:23:47,765 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-12 22:23:47,766 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2021-11-12 22:23:47,767 INFO L130 BoogieDeclarations]: Found specification of procedure printer_unbind [2021-11-12 22:23:47,767 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_unbind [2021-11-12 22:23:47,767 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2021-11-12 22:23:47,768 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2021-11-12 22:23:47,768 INFO L130 BoogieDeclarations]: Found specification of procedure printer_close [2021-11-12 22:23:47,768 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_close [2021-11-12 22:23:47,768 INFO L130 BoogieDeclarations]: Found specification of procedure __list_add [2021-11-12 22:23:47,768 INFO L138 BoogieDeclarations]: Found implementation of procedure __list_add [2021-11-12 22:23:47,769 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-11-12 22:23:47,769 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-11-12 22:23:47,769 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-12 22:23:47,769 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-12 22:23:47,769 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2021-11-12 22:23:47,769 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2021-11-12 22:23:47,770 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-12 22:23:47,770 INFO L130 BoogieDeclarations]: Found specification of procedure init_utsname [2021-11-12 22:23:47,770 INFO L138 BoogieDeclarations]: Found implementation of procedure init_utsname [2021-11-12 22:23:47,770 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_enable [2021-11-12 22:23:47,770 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_enable [2021-11-12 22:23:47,770 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2021-11-12 22:23:47,771 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2021-11-12 22:23:47,771 INFO L130 BoogieDeclarations]: Found specification of procedure list_add [2021-11-12 22:23:47,771 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add [2021-11-12 22:23:47,771 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_autoconfig [2021-11-12 22:23:47,771 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_autoconfig [2021-11-12 22:23:47,771 INFO L130 BoogieDeclarations]: Found specification of procedure prepare_to_wait [2021-11-12 22:23:47,772 INFO L138 BoogieDeclarations]: Found implementation of procedure prepare_to_wait [2021-11-12 22:23:47,772 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-11-12 22:23:47,772 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-11-12 22:23:47,772 INFO L130 BoogieDeclarations]: Found specification of procedure printer_setup [2021-11-12 22:23:47,772 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_setup [2021-11-12 22:23:47,772 INFO L130 BoogieDeclarations]: Found specification of procedure set_gadget_data [2021-11-12 22:23:47,773 INFO L138 BoogieDeclarations]: Found implementation of procedure set_gadget_data [2021-11-12 22:23:47,773 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_disable [2021-11-12 22:23:47,773 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_disable [2021-11-12 22:23:47,773 INFO L130 BoogieDeclarations]: Found specification of procedure __init_waitqueue_head [2021-11-12 22:23:47,773 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_waitqueue_head [2021-11-12 22:23:47,774 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_unregister_chrdev_region [2021-11-12 22:23:47,774 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_unregister_chrdev_region [2021-11-12 22:23:47,774 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-12 22:23:47,774 INFO L130 BoogieDeclarations]: Found specification of procedure finish_wait [2021-11-12 22:23:47,774 INFO L138 BoogieDeclarations]: Found implementation of procedure finish_wait [2021-11-12 22:23:47,774 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 22:23:47,775 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 22:23:47,775 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2021-11-12 22:23:47,775 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2021-11-12 22:23:48,748 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-12 22:24:42,951 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 22:24:42,951 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-12 22:24:42,956 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:24:42 BoogieIcfgContainer [2021-11-12 22:24:42,956 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 22:24:42,958 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 22:24:42,959 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 22:24:42,962 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 22:24:42,962 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 10:23:44" (1/3) ... [2021-11-12 22:24:42,963 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@276594a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:24:42, skipping insertion in model container [2021-11-12 22:24:42,964 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:23:47" (2/3) ... [2021-11-12 22:24:42,964 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@276594a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:24:42, skipping insertion in model container [2021-11-12 22:24:42,964 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:24:42" (3/3) ... [2021-11-12 22:24:42,966 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-stable-2b9ec6c-1-106_1a-drivers--usb--gadget--g_printer.ko-entry_point_ldv-val-v0.8.cil.out.i [2021-11-12 22:24:42,973 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 22:24:42,973 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 22:24:43,035 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 22:24:43,042 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 [2021-11-12 22:24:43,042 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 22:24:43,105 INFO L276 IsEmpty]: Start isEmpty. Operand has 1218 states, 830 states have (on average 1.363855421686747) internal successors, (1132), 873 states have internal predecessors, (1132), 320 states have call successors, (320), 67 states have call predecessors, (320), 66 states have return successors, (315), 312 states have call predecessors, (315), 315 states have call successors, (315) [2021-11-12 22:24:43,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-11-12 22:24:43,127 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:24:43,131 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:24:43,135 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:24:43,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:24:43,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1033882757, now seen corresponding path program 1 times [2021-11-12 22:24:43,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:24:43,171 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [268260264] [2021-11-12 22:24:43,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:24:43,172 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:24:43,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:24:43,179 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:24:43,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 22:24:45,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:24:45,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 1477 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-12 22:24:45,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:24:46,728 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 121 proven. 0 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2021-11-12 22:24:46,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:24:47,358 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2021-11-12 22:24:47,359 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:24:47,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [268260264] [2021-11-12 22:24:47,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [268260264] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:24:47,360 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:24:47,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2021-11-12 22:24:47,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917895909] [2021-11-12 22:24:47,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:24:47,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-12 22:24:47,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:24:47,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-12 22:24:47,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 22:24:47,418 INFO L87 Difference]: Start difference. First operand has 1218 states, 830 states have (on average 1.363855421686747) internal successors, (1132), 873 states have internal predecessors, (1132), 320 states have call successors, (320), 67 states have call predecessors, (320), 66 states have return successors, (315), 312 states have call predecessors, (315), 315 states have call successors, (315) Second operand has 2 states, 2 states have (on average 26.5) internal successors, (53), 2 states have internal predecessors, (53), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-12 22:24:47,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:24:47,653 INFO L93 Difference]: Finished difference Result 2431 states and 3579 transitions. [2021-11-12 22:24:47,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-12 22:24:47,656 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 26.5) internal successors, (53), 2 states have internal predecessors, (53), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 171 [2021-11-12 22:24:47,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:24:47,701 INFO L225 Difference]: With dead ends: 2431 [2021-11-12 22:24:47,702 INFO L226 Difference]: Without dead ends: 1206 [2021-11-12 22:24:47,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 340 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 22:24:47,731 INFO L933 BasicCegarLoop]: 1751 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1751 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.38ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-12 22:24:47,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1751 Invalid, 0 Unknown, 0 Unchecked, 17.38ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-12 22:24:47,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1206 states. [2021-11-12 22:24:47,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1206 to 1206. [2021-11-12 22:24:47,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1206 states, 825 states have (on average 1.3563636363636364) internal successors, (1119), 861 states have internal predecessors, (1119), 315 states have call successors, (315), 66 states have call predecessors, (315), 65 states have return successors, (302), 299 states have call predecessors, (302), 302 states have call successors, (302) [2021-11-12 22:24:47,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1206 states to 1206 states and 1736 transitions. [2021-11-12 22:24:47,960 INFO L78 Accepts]: Start accepts. Automaton has 1206 states and 1736 transitions. Word has length 171 [2021-11-12 22:24:47,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:24:47,961 INFO L470 AbstractCegarLoop]: Abstraction has 1206 states and 1736 transitions. [2021-11-12 22:24:47,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 26.5) internal successors, (53), 2 states have internal predecessors, (53), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-12 22:24:47,962 INFO L276 IsEmpty]: Start isEmpty. Operand 1206 states and 1736 transitions. [2021-11-12 22:24:47,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-11-12 22:24:47,971 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:24:47,972 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:24:48,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 22:24:48,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:24:48,188 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:24:48,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:24:48,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1726476551, now seen corresponding path program 1 times [2021-11-12 22:24:48,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:24:48,191 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1739776841] [2021-11-12 22:24:48,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:24:48,192 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:24:48,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:24:48,193 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:24:48,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 22:24:50,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:24:51,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 1477 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 22:24:51,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:24:51,719 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2021-11-12 22:24:51,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:24:52,673 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-11-12 22:24:52,674 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:24:52,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1739776841] [2021-11-12 22:24:52,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1739776841] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:24:52,674 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:24:52,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 9 [2021-11-12 22:24:52,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308636750] [2021-11-12 22:24:52,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:24:52,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:24:52,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:24:52,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:24:52,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:24:52,679 INFO L87 Difference]: Start difference. First operand 1206 states and 1736 transitions. Second operand has 6 states, 5 states have (on average 9.8) internal successors, (49), 6 states have internal predecessors, (49), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-12 22:24:53,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:24:53,205 INFO L93 Difference]: Finished difference Result 2402 states and 3461 transitions. [2021-11-12 22:24:53,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:24:53,206 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.8) internal successors, (49), 6 states have internal predecessors, (49), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 171 [2021-11-12 22:24:53,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:24:53,227 INFO L225 Difference]: With dead ends: 2402 [2021-11-12 22:24:53,227 INFO L226 Difference]: Without dead ends: 1209 [2021-11-12 22:24:53,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 333 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:24:53,238 INFO L933 BasicCegarLoop]: 1727 mSDtfsCounter, 6 mSDsluCounter, 6891 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 250.36ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 8618 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 41.98ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 294.79ms IncrementalHoareTripleChecker+Time [2021-11-12 22:24:53,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 8618 Invalid, 61 Unknown, 0 Unchecked, 41.98ms Time], IncrementalHoareTripleChecker [4 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 294.79ms Time] [2021-11-12 22:24:53,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1209 states. [2021-11-12 22:24:53,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1209 to 1209. [2021-11-12 22:24:53,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1209 states, 827 states have (on average 1.3567110036275696) internal successors, (1122), 864 states have internal predecessors, (1122), 315 states have call successors, (315), 66 states have call predecessors, (315), 66 states have return successors, (303), 299 states have call predecessors, (303), 302 states have call successors, (303) [2021-11-12 22:24:53,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1209 states to 1209 states and 1740 transitions. [2021-11-12 22:24:53,341 INFO L78 Accepts]: Start accepts. Automaton has 1209 states and 1740 transitions. Word has length 171 [2021-11-12 22:24:53,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:24:53,342 INFO L470 AbstractCegarLoop]: Abstraction has 1209 states and 1740 transitions. [2021-11-12 22:24:53,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.8) internal successors, (49), 6 states have internal predecessors, (49), 3 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-12 22:24:53,343 INFO L276 IsEmpty]: Start isEmpty. Operand 1209 states and 1740 transitions. [2021-11-12 22:24:53,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-11-12 22:24:53,349 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:24:53,349 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:24:53,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 22:24:53,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:24:53,564 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:24:53,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:24:53,564 INFO L85 PathProgramCache]: Analyzing trace with hash -696998786, now seen corresponding path program 1 times [2021-11-12 22:24:53,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:24:53,566 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [960982256] [2021-11-12 22:24:53,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:24:53,567 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:24:53,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:24:53,567 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:24:53,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 22:24:56,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:24:56,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 1502 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 22:24:56,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:24:57,015 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 48 proven. 1 refuted. 0 times theorem prover too weak. 286 trivial. 0 not checked. [2021-11-12 22:24:57,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:24:58,198 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 294 trivial. 0 not checked. [2021-11-12 22:24:58,198 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:24:58,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [960982256] [2021-11-12 22:24:58,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [960982256] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:24:58,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1803907223] [2021-11-12 22:24:58,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:24:58,200 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:24:58,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:24:58,207 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:24:58,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-11-12 22:24:59,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:24:59,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 1502 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:24:59,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:25:01,085 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 335 trivial. 0 not checked. [2021-11-12 22:25:01,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:25:01,694 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 335 trivial. 0 not checked. [2021-11-12 22:25:01,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1803907223] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:25:01,694 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:25:01,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [7, 7] total 12 [2021-11-12 22:25:01,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826111212] [2021-11-12 22:25:01,695 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:25:01,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:25:01,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:25:01,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:25:01,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:25:01,697 INFO L87 Difference]: Start difference. First operand 1209 states and 1740 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2021-11-12 22:25:01,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:25:01,885 INFO L93 Difference]: Finished difference Result 2359 states and 3401 transitions. [2021-11-12 22:25:01,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:25:01,886 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) Word has length 176 [2021-11-12 22:25:01,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:25:01,914 INFO L225 Difference]: With dead ends: 2359 [2021-11-12 22:25:01,914 INFO L226 Difference]: Without dead ends: 2335 [2021-11-12 22:25:01,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 700 GetRequests, 690 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:25:01,928 INFO L933 BasicCegarLoop]: 2005 mSDtfsCounter, 1645 mSDsluCounter, 1634 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 40.25ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1645 SdHoareTripleChecker+Valid, 3639 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 20.65ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 47.65ms IncrementalHoareTripleChecker+Time [2021-11-12 22:25:01,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1645 Valid, 3639 Invalid, 22 Unknown, 0 Unchecked, 20.65ms Time], IncrementalHoareTripleChecker [10 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 47.65ms Time] [2021-11-12 22:25:01,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2335 states. [2021-11-12 22:25:02,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2335 to 2328. [2021-11-12 22:25:02,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2328 states, 1602 states have (on average 1.3583021223470662) internal successors, (2176), 1664 states have internal predecessors, (2176), 598 states have call successors, (598), 128 states have call predecessors, (598), 127 states have return successors, (587), 577 states have call predecessors, (587), 586 states have call successors, (587) [2021-11-12 22:25:02,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2328 states to 2328 states and 3361 transitions. [2021-11-12 22:25:02,156 INFO L78 Accepts]: Start accepts. Automaton has 2328 states and 3361 transitions. Word has length 176 [2021-11-12 22:25:02,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:25:02,160 INFO L470 AbstractCegarLoop]: Abstraction has 2328 states and 3361 transitions. [2021-11-12 22:25:02,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2021-11-12 22:25:02,161 INFO L276 IsEmpty]: Start isEmpty. Operand 2328 states and 3361 transitions. [2021-11-12 22:25:02,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-11-12 22:25:02,164 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:25:02,169 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:25:02,222 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 22:25:02,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-11-12 22:25:02,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:25:02,592 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:25:02,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:25:02,593 INFO L85 PathProgramCache]: Analyzing trace with hash -132925552, now seen corresponding path program 1 times [2021-11-12 22:25:02,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:25:02,595 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [97864945] [2021-11-12 22:25:02,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:25:02,595 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:25:02,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:25:02,597 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:25:02,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 22:25:05,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:25:05,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 1503 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 22:25:05,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:25:05,903 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 48 proven. 1 refuted. 0 times theorem prover too weak. 286 trivial. 0 not checked. [2021-11-12 22:25:05,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:25:06,935 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 294 trivial. 0 not checked. [2021-11-12 22:25:06,935 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:25:06,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [97864945] [2021-11-12 22:25:06,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [97864945] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:25:06,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [539268391] [2021-11-12 22:25:06,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:25:06,940 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:25:06,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:25:06,952 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:25:06,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-12 22:25:08,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:25:08,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 1503 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:25:08,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:25:09,521 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 335 trivial. 0 not checked. [2021-11-12 22:25:09,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:25:10,072 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 335 trivial. 0 not checked. [2021-11-12 22:25:10,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [539268391] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:25:10,072 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:25:10,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [7, 7] total 12 [2021-11-12 22:25:10,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310208030] [2021-11-12 22:25:10,073 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:25:10,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:25:10,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:25:10,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:25:10,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:25:10,074 INFO L87 Difference]: Start difference. First operand 2328 states and 3361 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2021-11-12 22:25:10,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:25:10,374 INFO L93 Difference]: Finished difference Result 6892 states and 9966 transitions. [2021-11-12 22:25:10,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:25:10,375 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) Word has length 177 [2021-11-12 22:25:10,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:25:10,427 INFO L225 Difference]: With dead ends: 6892 [2021-11-12 22:25:10,427 INFO L226 Difference]: Without dead ends: 4594 [2021-11-12 22:25:10,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 704 GetRequests, 694 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:25:10,446 INFO L933 BasicCegarLoop]: 2181 mSDtfsCounter, 1644 mSDsluCounter, 1643 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1644 SdHoareTripleChecker+Valid, 3824 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.85ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.63ms IncrementalHoareTripleChecker+Time [2021-11-12 22:25:10,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1644 Valid, 3824 Invalid, 13 Unknown, 0 Unchecked, 16.85ms Time], IncrementalHoareTripleChecker [5 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 28.63ms Time] [2021-11-12 22:25:10,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4594 states. [2021-11-12 22:25:10,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4594 to 4583. [2021-11-12 22:25:10,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4583 states, 3165 states have (on average 1.3605055292259083) internal successors, (4306), 3279 states have internal predecessors, (4306), 1168 states have call successors, (1168), 252 states have call predecessors, (1168), 249 states have return successors, (1151), 1135 states have call predecessors, (1151), 1150 states have call successors, (1151) [2021-11-12 22:25:10,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4583 states to 4583 states and 6625 transitions. [2021-11-12 22:25:10,762 INFO L78 Accepts]: Start accepts. Automaton has 4583 states and 6625 transitions. Word has length 177 [2021-11-12 22:25:10,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:25:10,764 INFO L470 AbstractCegarLoop]: Abstraction has 4583 states and 6625 transitions. [2021-11-12 22:25:10,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2021-11-12 22:25:10,764 INFO L276 IsEmpty]: Start isEmpty. Operand 4583 states and 6625 transitions. [2021-11-12 22:25:10,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-11-12 22:25:10,770 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:25:10,770 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:25:10,825 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-12 22:25:10,997 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-11-12 22:25:11,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:25:11,188 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:25:11,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:25:11,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1415116571, now seen corresponding path program 1 times [2021-11-12 22:25:11,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:25:11,191 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1950862658] [2021-11-12 22:25:11,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:25:11,191 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:25:11,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:25:11,192 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:25:11,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 22:25:13,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:25:13,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 1511 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 22:25:13,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:25:14,470 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 48 proven. 1 refuted. 0 times theorem prover too weak. 286 trivial. 0 not checked. [2021-11-12 22:25:14,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:25:15,415 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 294 trivial. 0 not checked. [2021-11-12 22:25:15,416 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:25:15,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1950862658] [2021-11-12 22:25:15,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1950862658] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:25:15,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [269377062] [2021-11-12 22:25:15,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:25:15,416 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:25:15,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:25:15,418 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:25:15,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-12 22:25:16,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:25:17,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 1511 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:25:17,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:25:17,381 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 335 trivial. 0 not checked. [2021-11-12 22:25:17,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:25:17,826 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 335 trivial. 0 not checked. [2021-11-12 22:25:17,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [269377062] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:25:17,826 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:25:17,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7, 7] total 13 [2021-11-12 22:25:17,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575066660] [2021-11-12 22:25:17,827 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:25:17,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:25:17,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:25:17,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:25:17,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:25:17,829 INFO L87 Difference]: Start difference. First operand 4583 states and 6625 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-12 22:25:20,044 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:25:25,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:25:25,546 INFO L93 Difference]: Finished difference Result 17698 states and 25664 transitions. [2021-11-12 22:25:25,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:25:25,547 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 179 [2021-11-12 22:25:25,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:25:25,697 INFO L225 Difference]: With dead ends: 17698 [2021-11-12 22:25:25,697 INFO L226 Difference]: Without dead ends: 13145 [2021-11-12 22:25:25,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 712 GetRequests, 701 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:25:25,735 INFO L933 BasicCegarLoop]: 2472 mSDtfsCounter, 4227 mSDsluCounter, 2609 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 550 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6294.60ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4227 SdHoareTripleChecker+Valid, 5081 SdHoareTripleChecker+Invalid, 1138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 39.12ms SdHoareTripleChecker+Time, 550 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7038.82ms IncrementalHoareTripleChecker+Time [2021-11-12 22:25:25,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4227 Valid, 5081 Invalid, 1138 Unknown, 0 Unchecked, 39.12ms Time], IncrementalHoareTripleChecker [550 Valid, 587 Invalid, 1 Unknown, 0 Unchecked, 7038.82ms Time] [2021-11-12 22:25:25,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13145 states. [2021-11-12 22:25:26,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13145 to 13129. [2021-11-12 22:25:26,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13129 states, 9064 states have (on average 1.3654015887025597) internal successors, (12376), 9369 states have internal predecessors, (12376), 3344 states have call successors, (3344), 724 states have call predecessors, (3344), 720 states have return successors, (3327), 3287 states have call predecessors, (3327), 3326 states have call successors, (3327) [2021-11-12 22:25:26,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13129 states to 13129 states and 19047 transitions. [2021-11-12 22:25:26,860 INFO L78 Accepts]: Start accepts. Automaton has 13129 states and 19047 transitions. Word has length 179 [2021-11-12 22:25:26,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:25:26,861 INFO L470 AbstractCegarLoop]: Abstraction has 13129 states and 19047 transitions. [2021-11-12 22:25:26,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-12 22:25:26,862 INFO L276 IsEmpty]: Start isEmpty. Operand 13129 states and 19047 transitions. [2021-11-12 22:25:26,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-11-12 22:25:26,869 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:25:26,870 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:25:26,888 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-11-12 22:25:27,136 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-12 22:25:27,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:25:27,293 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:25:27,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:25:27,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1513764674, now seen corresponding path program 1 times [2021-11-12 22:25:27,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:25:27,296 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [460739056] [2021-11-12 22:25:27,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:25:27,296 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:25:27,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:25:27,301 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:25:27,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 22:25:30,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:25:30,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 1548 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 22:25:30,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:25:30,841 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 48 proven. 1 refuted. 0 times theorem prover too weak. 286 trivial. 0 not checked. [2021-11-12 22:25:30,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:25:31,910 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 294 trivial. 0 not checked. [2021-11-12 22:25:31,910 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:25:31,911 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [460739056] [2021-11-12 22:25:31,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [460739056] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:25:31,911 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [249898947] [2021-11-12 22:25:31,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:25:31,911 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:25:31,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:25:31,912 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:25:31,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-12 22:25:33,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:25:33,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 1548 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:25:33,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:25:34,486 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 335 trivial. 0 not checked. [2021-11-12 22:25:34,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:25:35,204 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 335 trivial. 0 not checked. [2021-11-12 22:25:35,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [249898947] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:25:35,204 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:25:35,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [7, 7] total 12 [2021-11-12 22:25:35,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933367458] [2021-11-12 22:25:35,205 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:25:35,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:25:35,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:25:35,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:25:35,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:25:35,207 INFO L87 Difference]: Start difference. First operand 13129 states and 19047 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 3 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (34), 2 states have call predecessors, (34), 2 states have call successors, (34) [2021-11-12 22:25:36,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:25:36,433 INFO L93 Difference]: Finished difference Result 39310 states and 57044 transitions. [2021-11-12 22:25:36,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:25:36,434 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 3 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (34), 2 states have call predecessors, (34), 2 states have call successors, (34) Word has length 195 [2021-11-12 22:25:36,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:25:36,666 INFO L225 Difference]: With dead ends: 39310 [2021-11-12 22:25:36,666 INFO L226 Difference]: Without dead ends: 26208 [2021-11-12 22:25:36,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 776 GetRequests, 766 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:25:36,756 INFO L933 BasicCegarLoop]: 2034 mSDtfsCounter, 1626 mSDsluCounter, 1666 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.31ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1626 SdHoareTripleChecker+Valid, 3700 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.37ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.83ms IncrementalHoareTripleChecker+Time [2021-11-12 22:25:36,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1626 Valid, 3700 Invalid, 13 Unknown, 0 Unchecked, 15.37ms Time], IncrementalHoareTripleChecker [5 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 29.83ms Time] [2021-11-12 22:25:36,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26208 states. [2021-11-12 22:25:38,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26208 to 26164. [2021-11-12 22:25:38,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26164 states, 18079 states have (on average 1.3658941313125725) internal successors, (24694), 18676 states have internal predecessors, (24694), 6652 states have call successors, (6652), 1439 states have call predecessors, (6652), 1432 states have return successors, (6633), 6552 states have call predecessors, (6633), 6632 states have call successors, (6633) [2021-11-12 22:25:38,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26164 states to 26164 states and 37979 transitions. [2021-11-12 22:25:38,496 INFO L78 Accepts]: Start accepts. Automaton has 26164 states and 37979 transitions. Word has length 195 [2021-11-12 22:25:38,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:25:38,501 INFO L470 AbstractCegarLoop]: Abstraction has 26164 states and 37979 transitions. [2021-11-12 22:25:38,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 3 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (34), 2 states have call predecessors, (34), 2 states have call successors, (34) [2021-11-12 22:25:38,501 INFO L276 IsEmpty]: Start isEmpty. Operand 26164 states and 37979 transitions. [2021-11-12 22:25:38,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-11-12 22:25:38,507 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:25:38,507 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:25:38,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-12 22:25:38,779 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 22:25:38,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:25:38,929 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:25:38,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:25:38,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1069416213, now seen corresponding path program 1 times [2021-11-12 22:25:38,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:25:38,933 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [892893860] [2021-11-12 22:25:38,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:25:38,933 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:25:38,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:25:38,936 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:25:38,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 22:25:41,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:25:41,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 1550 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 22:25:41,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:25:42,639 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 48 proven. 1 refuted. 0 times theorem prover too weak. 286 trivial. 0 not checked. [2021-11-12 22:25:42,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:25:43,729 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 294 trivial. 0 not checked. [2021-11-12 22:25:43,729 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:25:43,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [892893860] [2021-11-12 22:25:43,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [892893860] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:25:43,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1861340539] [2021-11-12 22:25:43,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:25:43,730 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:25:43,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:25:43,731 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:25:43,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-12 22:25:46,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:25:46,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 1550 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 22:25:46,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:25:47,116 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 48 proven. 1 refuted. 0 times theorem prover too weak. 286 trivial. 0 not checked. [2021-11-12 22:25:47,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:25:47,886 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 294 trivial. 0 not checked. [2021-11-12 22:25:47,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1861340539] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:25:47,887 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558451154] [2021-11-12 22:25:47,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:25:47,887 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:25:47,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:25:47,888 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:25:47,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-12 22:25:49,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:25:49,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 1550 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 22:25:49,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:25:49,725 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 48 proven. 1 refuted. 0 times theorem prover too weak. 286 trivial. 0 not checked. [2021-11-12 22:25:49,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:25:50,477 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 294 trivial. 0 not checked. [2021-11-12 22:25:50,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558451154] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:25:50,477 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:25:50,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 11 [2021-11-12 22:25:50,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518616435] [2021-11-12 22:25:50,478 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:25:50,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 22:25:50,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:25:50,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 22:25:50,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:25:50,481 INFO L87 Difference]: Start difference. First operand 26164 states and 37979 transitions. Second operand has 11 states, 9 states have (on average 9.88888888888889) internal successors, (89), 11 states have internal predecessors, (89), 4 states have call successors, (28), 2 states have call predecessors, (28), 5 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-12 22:25:52,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:25:52,295 INFO L93 Difference]: Finished difference Result 52461 states and 76137 transitions. [2021-11-12 22:25:52,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 22:25:52,297 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 9.88888888888889) internal successors, (89), 11 states have internal predecessors, (89), 4 states have call successors, (28), 2 states have call predecessors, (28), 5 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) Word has length 197 [2021-11-12 22:25:52,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:25:52,578 INFO L225 Difference]: With dead ends: 52461 [2021-11-12 22:25:52,579 INFO L226 Difference]: Without dead ends: 26310 [2021-11-12 22:25:52,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1180 GetRequests, 1167 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-11-12 22:25:52,669 INFO L933 BasicCegarLoop]: 1718 mSDtfsCounter, 16 mSDsluCounter, 8568 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 385.42ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 10286 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 23.72ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 428.92ms IncrementalHoareTripleChecker+Time [2021-11-12 22:25:52,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 10286 Invalid, 111 Unknown, 0 Unchecked, 23.72ms Time], IncrementalHoareTripleChecker [14 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 428.92ms Time] [2021-11-12 22:25:52,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26310 states. [2021-11-12 22:25:54,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26310 to 26170. [2021-11-12 22:25:54,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26170 states, 18083 states have (on average 1.3658684952718023) internal successors, (24699), 18680 states have internal predecessors, (24699), 6653 states have call successors, (6653), 1440 states have call predecessors, (6653), 1433 states have return successors, (6634), 6553 states have call predecessors, (6634), 6633 states have call successors, (6634) [2021-11-12 22:25:54,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26170 states to 26170 states and 37986 transitions. [2021-11-12 22:25:54,619 INFO L78 Accepts]: Start accepts. Automaton has 26170 states and 37986 transitions. Word has length 197 [2021-11-12 22:25:54,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:25:54,620 INFO L470 AbstractCegarLoop]: Abstraction has 26170 states and 37986 transitions. [2021-11-12 22:25:54,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 9.88888888888889) internal successors, (89), 11 states have internal predecessors, (89), 4 states have call successors, (28), 2 states have call predecessors, (28), 5 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-12 22:25:54,620 INFO L276 IsEmpty]: Start isEmpty. Operand 26170 states and 37986 transitions. [2021-11-12 22:25:54,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-11-12 22:25:54,626 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:25:54,626 INFO L514 BasicCegarLoop]: trace histogram [10, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:25:54,687 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-12 22:25:54,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-12 22:25:55,061 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-12 22:25:55,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:25:55,240 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:25:55,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:25:55,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1784272294, now seen corresponding path program 2 times [2021-11-12 22:25:55,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:25:55,243 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1666071422] [2021-11-12 22:25:55,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 22:25:55,244 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:25:55,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:25:55,246 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:25:55,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-12 22:25:57,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-12 22:25:57,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:25:57,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 1153 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-12 22:25:57,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:25:59,652 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 395 trivial. 0 not checked. [2021-11-12 22:25:59,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:26:02,897 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 395 trivial. 0 not checked. [2021-11-12 22:26:02,897 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:26:02,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1666071422] [2021-11-12 22:26:02,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1666071422] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:26:02,898 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:26:02,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13, 13] imperfect sequences [] total 22 [2021-11-12 22:26:02,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011806652] [2021-11-12 22:26:02,899 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:26:02,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-12 22:26:02,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:26:02,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-12 22:26:02,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-11-12 22:26:02,901 INFO L87 Difference]: Start difference. First operand 26170 states and 37986 transitions. Second operand has 22 states, 19 states have (on average 3.9473684210526314) internal successors, (75), 17 states have internal predecessors, (75), 6 states have call successors, (20), 3 states have call predecessors, (20), 7 states have return successors, (20), 6 states have call predecessors, (20), 5 states have call successors, (20) [2021-11-12 22:26:05,093 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.19s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:26:07,106 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:26:57,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:26:57,437 INFO L93 Difference]: Finished difference Result 95690 states and 139747 transitions. [2021-11-12 22:26:57,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-12 22:26:57,439 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 3.9473684210526314) internal successors, (75), 17 states have internal predecessors, (75), 6 states have call successors, (20), 3 states have call predecessors, (20), 7 states have return successors, (20), 6 states have call predecessors, (20), 5 states have call successors, (20) Word has length 202 [2021-11-12 22:26:57,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:26:58,169 INFO L225 Difference]: With dead ends: 95690 [2021-11-12 22:26:58,170 INFO L226 Difference]: Without dead ends: 69555 [2021-11-12 22:26:58,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 384 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=276, Invalid=1980, Unknown=0, NotChecked=0, Total=2256 [2021-11-12 22:26:58,282 INFO L933 BasicCegarLoop]: 3352 mSDtfsCounter, 4768 mSDsluCounter, 49924 mSDsCounter, 0 mSdLazyCounter, 7417 mSolverCounterSat, 582 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 41657.01ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4847 SdHoareTripleChecker+Valid, 53276 SdHoareTripleChecker+Invalid, 8001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 161.50ms SdHoareTripleChecker+Time, 582 IncrementalHoareTripleChecker+Valid, 7417 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 45487.14ms IncrementalHoareTripleChecker+Time [2021-11-12 22:26:58,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4847 Valid, 53276 Invalid, 8001 Unknown, 0 Unchecked, 161.50ms Time], IncrementalHoareTripleChecker [582 Valid, 7417 Invalid, 2 Unknown, 0 Unchecked, 45487.14ms Time] [2021-11-12 22:26:58,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69555 states. [2021-11-12 22:27:01,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69555 to 45566. [2021-11-12 22:27:01,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45566 states, 31473 states have (on average 1.3664410764782513) internal successors, (43006), 32521 states have internal predecessors, (43006), 11589 states have call successors, (11589), 2498 states have call predecessors, (11589), 2503 states have return successors, (11612), 11428 states have call predecessors, (11612), 11569 states have call successors, (11612) [2021-11-12 22:27:01,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45566 states to 45566 states and 66207 transitions. [2021-11-12 22:27:01,673 INFO L78 Accepts]: Start accepts. Automaton has 45566 states and 66207 transitions. Word has length 202 [2021-11-12 22:27:01,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:27:01,674 INFO L470 AbstractCegarLoop]: Abstraction has 45566 states and 66207 transitions. [2021-11-12 22:27:01,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 3.9473684210526314) internal successors, (75), 17 states have internal predecessors, (75), 6 states have call successors, (20), 3 states have call predecessors, (20), 7 states have return successors, (20), 6 states have call predecessors, (20), 5 states have call successors, (20) [2021-11-12 22:27:01,674 INFO L276 IsEmpty]: Start isEmpty. Operand 45566 states and 66207 transitions. [2021-11-12 22:27:01,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2021-11-12 22:27:01,682 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:27:01,683 INFO L514 BasicCegarLoop]: trace histogram [10, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:27:01,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-12 22:27:01,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:27:01,899 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:27:01,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:27:01,900 INFO L85 PathProgramCache]: Analyzing trace with hash 95363296, now seen corresponding path program 1 times [2021-11-12 22:27:01,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:27:01,902 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [803317223] [2021-11-12 22:27:01,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:27:01,902 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:27:01,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:27:01,904 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:27:01,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-12 22:27:04,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:27:04,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 1623 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:27:04,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:27:05,497 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 68 proven. 3 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-11-12 22:27:05,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:27:06,767 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 332 trivial. 0 not checked. [2021-11-12 22:27:06,767 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:27:06,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [803317223] [2021-11-12 22:27:06,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [803317223] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:27:06,768 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [392527241] [2021-11-12 22:27:06,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:27:06,768 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:27:06,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:27:06,775 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:27:06,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-12 22:27:08,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:27:08,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 1623 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:27:08,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:27:08,804 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 395 trivial. 0 not checked. [2021-11-12 22:27:08,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:27:09,270 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 395 trivial. 0 not checked. [2021-11-12 22:27:09,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [392527241] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:27:09,271 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:27:09,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8, 8] total 14 [2021-11-12 22:27:09,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360703074] [2021-11-12 22:27:09,272 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:27:09,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:27:09,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:27:09,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:27:09,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-11-12 22:27:09,274 INFO L87 Difference]: Start difference. First operand 45566 states and 66207 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 3 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-12 22:27:11,442 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:27:13,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:27:13,461 INFO L93 Difference]: Finished difference Result 91104 states and 132374 transitions. [2021-11-12 22:27:13,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:27:13,461 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 3 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 221 [2021-11-12 22:27:13,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:27:13,872 INFO L225 Difference]: With dead ends: 91104 [2021-11-12 22:27:13,872 INFO L226 Difference]: Without dead ends: 45573 [2021-11-12 22:27:14,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 880 GetRequests, 868 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-11-12 22:27:14,007 INFO L933 BasicCegarLoop]: 3308 mSDtfsCounter, 1608 mSDsluCounter, 1714 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2182.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1608 SdHoareTripleChecker+Valid, 5022 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.96ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2236.96ms IncrementalHoareTripleChecker+Time [2021-11-12 22:27:14,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1608 Valid, 5022 Invalid, 10 Unknown, 0 Unchecked, 8.96ms Time], IncrementalHoareTripleChecker [2 Valid, 7 Invalid, 1 Unknown, 0 Unchecked, 2236.96ms Time] [2021-11-12 22:27:14,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45573 states. [2021-11-12 22:27:16,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45573 to 45553. [2021-11-12 22:27:16,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45553 states, 31460 states have (on average 1.3662110616656071) internal successors, (42981), 32510 states have internal predecessors, (42981), 11589 states have call successors, (11589), 2498 states have call predecessors, (11589), 2503 states have return successors, (11612), 11426 states have call predecessors, (11612), 11569 states have call successors, (11612) [2021-11-12 22:27:16,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45553 states to 45553 states and 66182 transitions. [2021-11-12 22:27:16,790 INFO L78 Accepts]: Start accepts. Automaton has 45553 states and 66182 transitions. Word has length 221 [2021-11-12 22:27:16,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:27:16,791 INFO L470 AbstractCegarLoop]: Abstraction has 45553 states and 66182 transitions. [2021-11-12 22:27:16,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 3 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-12 22:27:16,792 INFO L276 IsEmpty]: Start isEmpty. Operand 45553 states and 66182 transitions. [2021-11-12 22:27:16,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2021-11-12 22:27:16,801 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:27:16,801 INFO L514 BasicCegarLoop]: trace histogram [10, 8, 8, 8, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 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] [2021-11-12 22:27:16,817 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-12 22:27:17,067 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-12 22:27:17,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:27:17,212 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:27:17,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:27:17,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1020198611, now seen corresponding path program 1 times [2021-11-12 22:27:17,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:27:17,216 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [975669010] [2021-11-12 22:27:17,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:27:17,216 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:27:17,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:27:17,218 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:27:17,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-12 22:27:19,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:27:19,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 1661 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:27:20,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:27:20,980 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 116 proven. 3 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2021-11-12 22:27:20,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:27:22,314 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2021-11-12 22:27:22,314 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:27:22,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [975669010] [2021-11-12 22:27:22,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [975669010] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:27:22,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [554675605] [2021-11-12 22:27:22,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:27:22,315 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:27:22,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:27:22,324 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:27:22,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-12 22:27:25,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:27:25,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 1661 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:27:25,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:27:25,811 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 116 proven. 3 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2021-11-12 22:27:25,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:27:26,640 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2021-11-12 22:27:26,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [554675605] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:27:26,640 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455516415] [2021-11-12 22:27:26,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:27:26,640 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:27:26,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:27:26,642 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:27:26,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-12 22:27:27,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:27:27,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 1661 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:27:27,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:27:28,955 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 116 proven. 3 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2021-11-12 22:27:28,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:27:30,450 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2021-11-12 22:27:30,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455516415] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:27:30,450 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:27:30,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 20 [2021-11-12 22:27:30,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120461686] [2021-11-12 22:27:30,451 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:27:30,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-12 22:27:30,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:27:30,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-12 22:27:30,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-11-12 22:27:30,454 INFO L87 Difference]: Start difference. First operand 45553 states and 66182 transitions. Second operand has 20 states, 17 states have (on average 7.294117647058823) internal successors, (124), 20 states have internal predecessors, (124), 5 states have call successors, (42), 2 states have call predecessors, (42), 7 states have return successors, (43), 5 states have call predecessors, (43), 5 states have call successors, (43) [2021-11-12 22:27:33,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:27:33,992 INFO L93 Difference]: Finished difference Result 91470 states and 132850 transitions. [2021-11-12 22:27:33,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-12 22:27:33,993 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 7.294117647058823) internal successors, (124), 20 states have internal predecessors, (124), 5 states have call successors, (42), 2 states have call predecessors, (42), 7 states have return successors, (43), 5 states have call predecessors, (43), 5 states have call successors, (43) Word has length 238 [2021-11-12 22:27:33,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:27:34,514 INFO L225 Difference]: With dead ends: 91470 [2021-11-12 22:27:34,515 INFO L226 Difference]: Without dead ends: 45927 [2021-11-12 22:27:34,639 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1427 GetRequests, 1404 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2021-11-12 22:27:34,639 INFO L933 BasicCegarLoop]: 1719 mSDtfsCounter, 25 mSDsluCounter, 20565 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 955.71ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 22284 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 24.84ms SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1064.30ms IncrementalHoareTripleChecker+Time [2021-11-12 22:27:34,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 22284 Invalid, 255 Unknown, 0 Unchecked, 24.84ms Time], IncrementalHoareTripleChecker [19 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 1064.30ms Time] [2021-11-12 22:27:34,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45927 states. [2021-11-12 22:27:36,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45927 to 45554. [2021-11-12 22:27:36,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45554 states, 31461 states have (on average 1.3662312068910716) internal successors, (42983), 32511 states have internal predecessors, (42983), 11589 states have call successors, (11589), 2498 states have call predecessors, (11589), 2503 states have return successors, (11612), 11426 states have call predecessors, (11612), 11569 states have call successors, (11612) [2021-11-12 22:27:37,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45554 states to 45554 states and 66184 transitions. [2021-11-12 22:27:37,187 INFO L78 Accepts]: Start accepts. Automaton has 45554 states and 66184 transitions. Word has length 238 [2021-11-12 22:27:37,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:27:37,188 INFO L470 AbstractCegarLoop]: Abstraction has 45554 states and 66184 transitions. [2021-11-12 22:27:37,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 7.294117647058823) internal successors, (124), 20 states have internal predecessors, (124), 5 states have call successors, (42), 2 states have call predecessors, (42), 7 states have return successors, (43), 5 states have call predecessors, (43), 5 states have call successors, (43) [2021-11-12 22:27:37,188 INFO L276 IsEmpty]: Start isEmpty. Operand 45554 states and 66184 transitions. [2021-11-12 22:27:37,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2021-11-12 22:27:37,195 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:27:37,196 INFO L514 BasicCegarLoop]: trace histogram [15, 8, 8, 8, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 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] [2021-11-12 22:27:37,225 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-11-12 22:27:37,483 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-12 22:27:37,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-12 22:27:37,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:27:37,813 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:27:37,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:27:37,814 INFO L85 PathProgramCache]: Analyzing trace with hash 765719176, now seen corresponding path program 2 times [2021-11-12 22:27:37,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:27:37,816 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [71110113] [2021-11-12 22:27:37,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 22:27:37,816 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:27:37,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:27:37,817 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:27:37,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-12 22:27:40,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-12 22:27:40,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:27:40,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 1127 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-12 22:27:40,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:27:42,158 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2021-11-12 22:27:42,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:27:44,602 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2021-11-12 22:27:44,602 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:27:44,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [71110113] [2021-11-12 22:27:44,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [71110113] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:27:44,603 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:27:44,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11, 11] imperfect sequences [] total 17 [2021-11-12 22:27:44,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765683890] [2021-11-12 22:27:44,603 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:27:44,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-12 22:27:44,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:27:44,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-12 22:27:44,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-11-12 22:27:44,610 INFO L87 Difference]: Start difference. First operand 45554 states and 66184 transitions. Second operand has 17 states, 15 states have (on average 6.133333333333334) internal successors, (92), 13 states have internal predecessors, (92), 5 states have call successors, (31), 3 states have call predecessors, (31), 6 states have return successors, (29), 6 states have call predecessors, (29), 5 states have call successors, (29) [2021-11-12 22:27:46,858 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.25s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:27:48,873 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:27:50,885 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:27:52,896 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 [] [2021-11-12 22:28:31,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:28:31,687 INFO L93 Difference]: Finished difference Result 85540 states and 124286 transitions. [2021-11-12 22:28:31,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-12 22:28:31,689 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 6.133333333333334) internal successors, (92), 13 states have internal predecessors, (92), 5 states have call successors, (31), 3 states have call predecessors, (31), 6 states have return successors, (29), 6 states have call predecessors, (29), 5 states have call successors, (29) Word has length 243 [2021-11-12 22:28:31,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:28:31,865 INFO L225 Difference]: With dead ends: 85540 [2021-11-12 22:28:31,865 INFO L226 Difference]: Without dead ends: 40019 [2021-11-12 22:28:31,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 498 GetRequests, 470 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2021-11-12 22:28:31,971 INFO L933 BasicCegarLoop]: 3319 mSDtfsCounter, 2712 mSDsluCounter, 34004 mSDsCounter, 0 mSdLazyCounter, 4764 mSolverCounterSat, 441 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 38172.30ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2716 SdHoareTripleChecker+Valid, 37323 SdHoareTripleChecker+Invalid, 5209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 107.22ms SdHoareTripleChecker+Time, 441 IncrementalHoareTripleChecker+Valid, 4764 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 41298.98ms IncrementalHoareTripleChecker+Time [2021-11-12 22:28:31,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2716 Valid, 37323 Invalid, 5209 Unknown, 0 Unchecked, 107.22ms Time], IncrementalHoareTripleChecker [441 Valid, 4764 Invalid, 4 Unknown, 0 Unchecked, 41298.98ms Time] [2021-11-12 22:28:32,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40019 states. [2021-11-12 22:28:33,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40019 to 38809. [2021-11-12 22:28:33,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38809 states, 26783 states have (on average 1.3669118470671695) internal successors, (36610), 27677 states have internal predecessors, (36610), 9896 states have call successors, (9896), 2124 states have call predecessors, (9896), 2129 states have return successors, (9920), 9763 states have call predecessors, (9920), 9884 states have call successors, (9920) [2021-11-12 22:28:34,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38809 states to 38809 states and 56426 transitions. [2021-11-12 22:28:34,097 INFO L78 Accepts]: Start accepts. Automaton has 38809 states and 56426 transitions. Word has length 243 [2021-11-12 22:28:34,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:28:34,098 INFO L470 AbstractCegarLoop]: Abstraction has 38809 states and 56426 transitions. [2021-11-12 22:28:34,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 6.133333333333334) internal successors, (92), 13 states have internal predecessors, (92), 5 states have call successors, (31), 3 states have call predecessors, (31), 6 states have return successors, (29), 6 states have call predecessors, (29), 5 states have call successors, (29) [2021-11-12 22:28:34,099 INFO L276 IsEmpty]: Start isEmpty. Operand 38809 states and 56426 transitions. [2021-11-12 22:28:34,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2021-11-12 22:28:34,108 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:28:34,108 INFO L514 BasicCegarLoop]: trace histogram [15, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:28:34,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-12 22:28:34,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:28:34,332 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:28:34,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:28:34,332 INFO L85 PathProgramCache]: Analyzing trace with hash -418595555, now seen corresponding path program 1 times [2021-11-12 22:28:34,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:28:34,335 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [166150448] [2021-11-12 22:28:34,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:28:34,335 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:28:34,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:28:34,336 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:28:34,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-12 22:28:37,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:28:37,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 1661 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:28:37,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:28:38,161 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 96 proven. 6 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2021-11-12 22:28:38,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:28:39,862 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 386 trivial. 0 not checked. [2021-11-12 22:28:39,863 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:28:39,863 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [166150448] [2021-11-12 22:28:39,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [166150448] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:28:39,863 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [321613809] [2021-11-12 22:28:39,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:28:39,863 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:28:39,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:28:39,866 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:28:39,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-12 22:28:41,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:28:41,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 1661 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 22:28:41,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:28:41,707 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2021-11-12 22:28:41,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:28:42,304 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2021-11-12 22:28:42,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [321613809] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:28:42,304 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:28:42,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [9, 9] total 19 [2021-11-12 22:28:42,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133375535] [2021-11-12 22:28:42,305 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:28:42,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:28:42,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:28:42,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:28:42,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-11-12 22:28:42,307 INFO L87 Difference]: Start difference. First operand 38809 states and 56426 transitions. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-12 22:28:44,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:28:44,310 INFO L93 Difference]: Finished difference Result 72218 states and 105190 transitions. [2021-11-12 22:28:44,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:28:44,311 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 238 [2021-11-12 22:28:44,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:28:44,437 INFO L225 Difference]: With dead ends: 72218 [2021-11-12 22:28:44,437 INFO L226 Difference]: Without dead ends: 33465 [2021-11-12 22:28:44,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 954 GetRequests, 934 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-11-12 22:28:44,669 INFO L933 BasicCegarLoop]: 2233 mSDtfsCounter, 1373 mSDsluCounter, 8095 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 438 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 336.81ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1432 SdHoareTripleChecker+Valid, 10328 SdHoareTripleChecker+Invalid, 471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.60ms SdHoareTripleChecker+Time, 438 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 409.72ms IncrementalHoareTripleChecker+Time [2021-11-12 22:28:44,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1432 Valid, 10328 Invalid, 471 Unknown, 0 Unchecked, 11.60ms Time], IncrementalHoareTripleChecker [438 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 409.72ms Time] [2021-11-12 22:28:44,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33465 states. [2021-11-12 22:28:46,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33465 to 32366. [2021-11-12 22:28:46,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32366 states, 22335 states have (on average 1.3666442802775913) internal successors, (30524), 23079 states have internal predecessors, (30524), 8251 states have call successors, (8251), 1776 states have call predecessors, (8251), 1779 states have return successors, (8271), 8140 states have call predecessors, (8271), 8241 states have call successors, (8271) [2021-11-12 22:28:46,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32366 states to 32366 states and 47046 transitions. [2021-11-12 22:28:46,192 INFO L78 Accepts]: Start accepts. Automaton has 32366 states and 47046 transitions. Word has length 238 [2021-11-12 22:28:46,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:28:46,192 INFO L470 AbstractCegarLoop]: Abstraction has 32366 states and 47046 transitions. [2021-11-12 22:28:46,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-12 22:28:46,193 INFO L276 IsEmpty]: Start isEmpty. Operand 32366 states and 47046 transitions. [2021-11-12 22:28:46,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2021-11-12 22:28:46,201 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:28:46,202 INFO L514 BasicCegarLoop]: trace histogram [15, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 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] [2021-11-12 22:28:46,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-12 22:28:46,423 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (23)] Ended with exit code 0 [2021-11-12 22:28:46,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:28:46,616 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:28:46,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:28:46,616 INFO L85 PathProgramCache]: Analyzing trace with hash 156883065, now seen corresponding path program 1 times [2021-11-12 22:28:46,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:28:46,618 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [647376277] [2021-11-12 22:28:46,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:28:46,618 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:28:46,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:28:46,619 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:28:46,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-12 22:28:48,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:28:49,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 1671 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:28:49,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:28:49,783 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 96 proven. 6 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2021-11-12 22:28:49,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:28:51,290 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2021-11-12 22:28:51,290 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:28:51,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [647376277] [2021-11-12 22:28:51,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [647376277] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:28:51,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1402858550] [2021-11-12 22:28:51,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:28:51,290 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:28:51,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:28:51,292 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:28:51,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-11-12 22:28:52,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:28:52,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 1671 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 22:28:52,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:28:53,126 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2021-11-12 22:28:53,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:28:53,544 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 490 trivial. 0 not checked. [2021-11-12 22:28:53,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1402858550] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:28:53,544 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:28:53,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [9, 9] total 19 [2021-11-12 22:28:53,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711385493] [2021-11-12 22:28:53,545 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:28:53,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:28:53,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:28:53,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:28:53,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-11-12 22:28:53,546 INFO L87 Difference]: Start difference. First operand 32366 states and 47046 transitions. Second operand has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-12 22:28:55,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:28:55,050 INFO L93 Difference]: Finished difference Result 33643 states and 49101 transitions. [2021-11-12 22:28:55,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:28:55,051 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 242 [2021-11-12 22:28:55,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:28:55,136 INFO L225 Difference]: With dead ends: 33643 [2021-11-12 22:28:55,136 INFO L226 Difference]: Without dead ends: 20715 [2021-11-12 22:28:55,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 970 GetRequests, 950 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-11-12 22:28:55,172 INFO L933 BasicCegarLoop]: 2125 mSDtfsCounter, 1467 mSDsluCounter, 7906 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 407 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 334.82ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1527 SdHoareTripleChecker+Valid, 10031 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.21ms SdHoareTripleChecker+Time, 407 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 405.45ms IncrementalHoareTripleChecker+Time [2021-11-12 22:28:55,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1527 Valid, 10031 Invalid, 441 Unknown, 0 Unchecked, 11.21ms Time], IncrementalHoareTripleChecker [407 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 405.45ms Time] [2021-11-12 22:28:55,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20715 states. [2021-11-12 22:28:56,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20715 to 19480. [2021-11-12 22:28:56,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19480 states, 13443 states have (on average 1.3654690173324406) internal successors, (18356), 13890 states have internal predecessors, (18356), 4961 states have call successors, (4961), 1073 states have call predecessors, (4961), 1075 states have return successors, (4971), 4894 states have call predecessors, (4971), 4953 states have call successors, (4971) [2021-11-12 22:28:56,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19480 states to 19480 states and 28288 transitions. [2021-11-12 22:28:56,144 INFO L78 Accepts]: Start accepts. Automaton has 19480 states and 28288 transitions. Word has length 242 [2021-11-12 22:28:56,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:28:56,145 INFO L470 AbstractCegarLoop]: Abstraction has 19480 states and 28288 transitions. [2021-11-12 22:28:56,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-12 22:28:56,145 INFO L276 IsEmpty]: Start isEmpty. Operand 19480 states and 28288 transitions. [2021-11-12 22:28:56,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2021-11-12 22:28:56,153 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:28:56,153 INFO L514 BasicCegarLoop]: trace histogram [15, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 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] [2021-11-12 22:28:56,166 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2021-11-12 22:28:56,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-12 22:28:56,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:28:56,554 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:28:56,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:28:56,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1386442970, now seen corresponding path program 1 times [2021-11-12 22:28:56,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:28:56,556 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [636929933] [2021-11-12 22:28:56,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:28:56,556 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:28:56,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:28:56,556 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:28:56,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-12 22:28:58,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:28:58,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 1674 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:28:58,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:28:59,759 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 96 proven. 6 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2021-11-12 22:28:59,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:01,369 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2021-11-12 22:29:01,369 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:29:01,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [636929933] [2021-11-12 22:29:01,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [636929933] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:29:01,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [331237433] [2021-11-12 22:29:01,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:29:01,370 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:29:01,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:29:01,379 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:29:01,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-11-12 22:29:02,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:29:02,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 1674 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 22:29:02,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:03,390 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 490 trivial. 0 not checked. [2021-11-12 22:29:03,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:03,827 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 490 trivial. 0 not checked. [2021-11-12 22:29:03,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [331237433] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:29:03,828 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:29:03,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [9, 9] total 19 [2021-11-12 22:29:03,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605644637] [2021-11-12 22:29:03,829 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:29:03,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:29:03,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:29:03,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:29:03,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-11-12 22:29:03,830 INFO L87 Difference]: Start difference. First operand 19480 states and 28288 transitions. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 2 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2021-11-12 22:29:05,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:29:05,122 INFO L93 Difference]: Finished difference Result 20765 states and 30360 transitions. [2021-11-12 22:29:05,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:29:05,123 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 2 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) Word has length 245 [2021-11-12 22:29:05,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:29:05,165 INFO L225 Difference]: With dead ends: 20765 [2021-11-12 22:29:05,165 INFO L226 Difference]: Without dead ends: 14308 [2021-11-12 22:29:05,181 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 982 GetRequests, 962 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-11-12 22:29:05,181 INFO L933 BasicCegarLoop]: 2230 mSDtfsCounter, 1415 mSDsluCounter, 7915 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 427 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 357.44ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1477 SdHoareTripleChecker+Valid, 10145 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.08ms SdHoareTripleChecker+Time, 427 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 432.48ms IncrementalHoareTripleChecker+Time [2021-11-12 22:29:05,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1477 Valid, 10145 Invalid, 467 Unknown, 0 Unchecked, 12.08ms Time], IncrementalHoareTripleChecker [427 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 432.48ms Time] [2021-11-12 22:29:05,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14308 states. [2021-11-12 22:29:05,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14308 to 13050. [2021-11-12 22:29:05,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13050 states, 9005 states have (on average 1.3639089394780677) internal successors, (12282), 9305 states have internal predecessors, (12282), 3320 states have call successors, (3320), 723 states have call predecessors, (3320), 724 states have return successors, (3324), 3273 states have call predecessors, (3324), 3312 states have call successors, (3324) [2021-11-12 22:29:05,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13050 states to 13050 states and 18926 transitions. [2021-11-12 22:29:05,790 INFO L78 Accepts]: Start accepts. Automaton has 13050 states and 18926 transitions. Word has length 245 [2021-11-12 22:29:05,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:29:05,790 INFO L470 AbstractCegarLoop]: Abstraction has 13050 states and 18926 transitions. [2021-11-12 22:29:05,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 2 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2021-11-12 22:29:05,791 INFO L276 IsEmpty]: Start isEmpty. Operand 13050 states and 18926 transitions. [2021-11-12 22:29:05,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2021-11-12 22:29:05,799 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:29:05,799 INFO L514 BasicCegarLoop]: trace histogram [15, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 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] [2021-11-12 22:29:05,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-12 22:29:06,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2021-11-12 22:29:06,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:29:06,216 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:29:06,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:29:06,216 INFO L85 PathProgramCache]: Analyzing trace with hash 215868703, now seen corresponding path program 1 times [2021-11-12 22:29:06,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:29:06,218 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [779920284] [2021-11-12 22:29:06,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:29:06,219 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:29:06,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:29:06,220 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:29:06,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-12 22:29:08,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:29:08,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 1686 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:29:08,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:09,545 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 96 proven. 6 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2021-11-12 22:29:09,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:11,099 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2021-11-12 22:29:11,099 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:29:11,100 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [779920284] [2021-11-12 22:29:11,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [779920284] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:29:11,100 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [883811463] [2021-11-12 22:29:11,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:29:11,100 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:29:11,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:29:11,101 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:29:11,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-11-12 22:29:12,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:29:12,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 1686 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 22:29:12,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:12,871 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 490 trivial. 0 not checked. [2021-11-12 22:29:12,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:13,285 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 490 trivial. 0 not checked. [2021-11-12 22:29:13,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [883811463] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:29:13,285 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:29:13,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [9, 9] total 19 [2021-11-12 22:29:13,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304687528] [2021-11-12 22:29:13,286 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:29:13,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:29:13,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:29:13,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:29:13,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-11-12 22:29:13,287 INFO L87 Difference]: Start difference. First operand 13050 states and 18926 transitions. Second operand has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-12 22:29:14,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:29:14,504 INFO L93 Difference]: Finished difference Result 26051 states and 37795 transitions. [2021-11-12 22:29:14,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:29:14,505 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 248 [2021-11-12 22:29:14,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:29:14,549 INFO L225 Difference]: With dead ends: 26051 [2021-11-12 22:29:14,549 INFO L226 Difference]: Without dead ends: 13057 [2021-11-12 22:29:14,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 994 GetRequests, 973 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-11-12 22:29:14,580 INFO L933 BasicCegarLoop]: 2079 mSDtfsCounter, 1377 mSDsluCounter, 7265 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 423 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 333.39ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1378 SdHoareTripleChecker+Valid, 9344 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.20ms SdHoareTripleChecker+Time, 423 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 404.43ms IncrementalHoareTripleChecker+Time [2021-11-12 22:29:14,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1378 Valid, 9344 Invalid, 449 Unknown, 0 Unchecked, 10.20ms Time], IncrementalHoareTripleChecker [423 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 404.43ms Time] [2021-11-12 22:29:14,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13057 states. [2021-11-12 22:29:15,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13057 to 13044. [2021-11-12 22:29:15,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13044 states, 9002 states have (on average 1.3638080426571872) internal successors, (12277), 9302 states have internal predecessors, (12277), 3318 states have call successors, (3318), 721 states have call predecessors, (3318), 723 states have return successors, (3322), 3272 states have call predecessors, (3322), 3310 states have call successors, (3322) [2021-11-12 22:29:15,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13044 states to 13044 states and 18917 transitions. [2021-11-12 22:29:15,252 INFO L78 Accepts]: Start accepts. Automaton has 13044 states and 18917 transitions. Word has length 248 [2021-11-12 22:29:15,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:29:15,253 INFO L470 AbstractCegarLoop]: Abstraction has 13044 states and 18917 transitions. [2021-11-12 22:29:15,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-12 22:29:15,253 INFO L276 IsEmpty]: Start isEmpty. Operand 13044 states and 18917 transitions. [2021-11-12 22:29:15,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2021-11-12 22:29:15,260 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:29:15,261 INFO L514 BasicCegarLoop]: trace histogram [15, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 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] [2021-11-12 22:29:15,277 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2021-11-12 22:29:15,502 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-12 22:29:15,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:29:15,672 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:29:15,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:29:15,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1596885938, now seen corresponding path program 1 times [2021-11-12 22:29:15,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:29:15,675 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [380654879] [2021-11-12 22:29:15,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:29:15,675 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:29:15,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:29:15,676 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:29:15,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-12 22:29:17,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:29:18,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 1676 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:29:18,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:18,785 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 96 proven. 6 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2021-11-12 22:29:18,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:20,293 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2021-11-12 22:29:20,294 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:29:20,294 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [380654879] [2021-11-12 22:29:20,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [380654879] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:29:20,294 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [889019214] [2021-11-12 22:29:20,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:29:20,294 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:29:20,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:29:20,295 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:29:20,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2021-11-12 22:29:21,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:29:21,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 1676 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:29:21,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:22,271 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 490 trivial. 0 not checked. [2021-11-12 22:29:22,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:22,717 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 490 trivial. 0 not checked. [2021-11-12 22:29:22,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [889019214] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:29:22,717 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:29:22,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [9, 9] total 21 [2021-11-12 22:29:22,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288781323] [2021-11-12 22:29:22,718 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:29:22,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:29:22,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:29:22,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:29:22,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-11-12 22:29:22,720 INFO L87 Difference]: Start difference. First operand 13044 states and 18917 transitions. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 2 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2021-11-12 22:29:25,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:29:25,232 INFO L93 Difference]: Finished difference Result 22909 states and 33193 transitions. [2021-11-12 22:29:25,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 22:29:25,232 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 2 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) Word has length 247 [2021-11-12 22:29:25,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:29:25,265 INFO L225 Difference]: With dead ends: 22909 [2021-11-12 22:29:25,265 INFO L226 Difference]: Without dead ends: 9921 [2021-11-12 22:29:25,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 994 GetRequests, 968 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=113, Invalid=643, Unknown=0, NotChecked=0, Total=756 [2021-11-12 22:29:25,294 INFO L933 BasicCegarLoop]: 1948 mSDtfsCounter, 3361 mSDsluCounter, 9136 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 500 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1231.23ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3361 SdHoareTripleChecker+Valid, 11084 SdHoareTripleChecker+Invalid, 797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 20.18ms SdHoareTripleChecker+Time, 500 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1402.41ms IncrementalHoareTripleChecker+Time [2021-11-12 22:29:25,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3361 Valid, 11084 Invalid, 797 Unknown, 0 Unchecked, 20.18ms Time], IncrementalHoareTripleChecker [500 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 1402.41ms Time] [2021-11-12 22:29:25,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9921 states. [2021-11-12 22:29:25,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9921 to 9909. [2021-11-12 22:29:25,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9909 states, 6833 states have (on average 1.3604566076393971) internal successors, (9296), 7061 states have internal predecessors, (9296), 2514 states have call successors, (2514), 559 states have call predecessors, (2514), 561 states have return successors, (2512), 2477 states have call predecessors, (2512), 2506 states have call successors, (2512) [2021-11-12 22:29:25,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9909 states to 9909 states and 14322 transitions. [2021-11-12 22:29:25,792 INFO L78 Accepts]: Start accepts. Automaton has 9909 states and 14322 transitions. Word has length 247 [2021-11-12 22:29:25,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:29:25,793 INFO L470 AbstractCegarLoop]: Abstraction has 9909 states and 14322 transitions. [2021-11-12 22:29:25,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 2 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2021-11-12 22:29:25,794 INFO L276 IsEmpty]: Start isEmpty. Operand 9909 states and 14322 transitions. [2021-11-12 22:29:25,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2021-11-12 22:29:25,802 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:29:25,802 INFO L514 BasicCegarLoop]: trace histogram [15, 9, 9, 9, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 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] [2021-11-12 22:29:25,828 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2021-11-12 22:29:26,071 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-12 22:29:26,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:29:26,235 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:29:26,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:29:26,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1093976529, now seen corresponding path program 1 times [2021-11-12 22:29:26,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:29:26,241 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2054564764] [2021-11-12 22:29:26,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:29:26,241 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:29:26,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:29:26,243 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:29:26,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-12 22:29:28,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:29:29,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 1721 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:29:29,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:29,905 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 228 proven. 6 refuted. 0 times theorem prover too weak. 403 trivial. 0 not checked. [2021-11-12 22:29:29,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:31,592 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 543 trivial. 0 not checked. [2021-11-12 22:29:31,593 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:29:31,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2054564764] [2021-11-12 22:29:31,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2054564764] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:29:31,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [111654752] [2021-11-12 22:29:31,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:29:31,593 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:29:31,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:29:31,594 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:29:31,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2021-11-12 22:29:34,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:29:34,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 1721 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 22:29:34,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:35,144 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 228 proven. 6 refuted. 0 times theorem prover too weak. 403 trivial. 0 not checked. [2021-11-12 22:29:35,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:36,073 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 543 trivial. 0 not checked. [2021-11-12 22:29:36,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [111654752] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:29:36,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897548899] [2021-11-12 22:29:36,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:29:36,074 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:29:36,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:29:36,075 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:29:36,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-12 22:29:37,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:29:37,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 1721 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:29:37,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:38,308 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 228 proven. 6 refuted. 0 times theorem prover too weak. 403 trivial. 0 not checked. [2021-11-12 22:29:38,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:40,274 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 543 trivial. 0 not checked. [2021-11-12 22:29:40,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897548899] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:29:40,275 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:29:40,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 23 [2021-11-12 22:29:40,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215469681] [2021-11-12 22:29:40,276 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:29:40,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-12 22:29:40,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:29:40,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-12 22:29:40,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-11-12 22:29:40,278 INFO L87 Difference]: Start difference. First operand 9909 states and 14322 transitions. Second operand has 23 states, 20 states have (on average 6.3) internal successors, (126), 23 states have internal predecessors, (126), 5 states have call successors, (44), 2 states have call predecessors, (44), 7 states have return successors, (45), 5 states have call predecessors, (45), 5 states have call successors, (45) [2021-11-12 22:29:42,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:29:42,979 INFO L93 Difference]: Finished difference Result 19905 states and 28856 transitions. [2021-11-12 22:29:42,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-12 22:29:42,980 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 6.3) internal successors, (126), 23 states have internal predecessors, (126), 5 states have call successors, (44), 2 states have call predecessors, (44), 7 states have return successors, (45), 5 states have call predecessors, (45), 5 states have call successors, (45) Word has length 258 [2021-11-12 22:29:42,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:29:43,019 INFO L225 Difference]: With dead ends: 19905 [2021-11-12 22:29:43,019 INFO L226 Difference]: Without dead ends: 10000 [2021-11-12 22:29:43,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1548 GetRequests, 1521 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=147, Invalid=665, Unknown=0, NotChecked=0, Total=812 [2021-11-12 22:29:43,046 INFO L933 BasicCegarLoop]: 1707 mSDtfsCounter, 47 mSDsluCounter, 18724 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1233.09ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 20431 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 22.35ms SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1374.08ms IncrementalHoareTripleChecker+Time [2021-11-12 22:29:43,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 20431 Invalid, 293 Unknown, 0 Unchecked, 22.35ms Time], IncrementalHoareTripleChecker [29 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 1374.08ms Time] [2021-11-12 22:29:43,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10000 states. [2021-11-12 22:29:43,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10000 to 9946. [2021-11-12 22:29:43,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9946 states, 6870 states have (on average 1.3624454148471616) internal successors, (9360), 7098 states have internal predecessors, (9360), 2514 states have call successors, (2514), 559 states have call predecessors, (2514), 561 states have return successors, (2512), 2477 states have call predecessors, (2512), 2506 states have call successors, (2512) [2021-11-12 22:29:43,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9946 states to 9946 states and 14386 transitions. [2021-11-12 22:29:43,533 INFO L78 Accepts]: Start accepts. Automaton has 9946 states and 14386 transitions. Word has length 258 [2021-11-12 22:29:43,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:29:43,533 INFO L470 AbstractCegarLoop]: Abstraction has 9946 states and 14386 transitions. [2021-11-12 22:29:43,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 6.3) internal successors, (126), 23 states have internal predecessors, (126), 5 states have call successors, (44), 2 states have call predecessors, (44), 7 states have return successors, (45), 5 states have call predecessors, (45), 5 states have call successors, (45) [2021-11-12 22:29:43,533 INFO L276 IsEmpty]: Start isEmpty. Operand 9946 states and 14386 transitions. [2021-11-12 22:29:43,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2021-11-12 22:29:43,540 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:29:43,540 INFO L514 BasicCegarLoop]: trace histogram [20, 9, 9, 9, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 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] [2021-11-12 22:29:43,575 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-11-12 22:29:43,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-12 22:29:43,954 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (33)] Ended with exit code 0 [2021-11-12 22:29:44,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:29:44,141 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:29:44,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:29:44,142 INFO L85 PathProgramCache]: Analyzing trace with hash 405796268, now seen corresponding path program 2 times [2021-11-12 22:29:44,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:29:44,144 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [314172319] [2021-11-12 22:29:44,144 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 22:29:44,144 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:29:44,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:29:44,145 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:29:44,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c572c5d8-7e9e-4561-ad14-5c8ce46ea889/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process