./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-challenges/linux-3.8-rc1-32_7a-drivers--usb--misc--sisusbvga--sisusbvga.ko-ldv_main0_sequence_infinite_withcheck_stateful.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_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/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_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-challenges/linux-3.8-rc1-32_7a-drivers--usb--misc--sisusbvga--sisusbvga.ko-ldv_main0_sequence_infinite_withcheck_stateful.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/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_8855f282-5b43-4fe0-a2e7-6fde38549d60/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 d62cca735e5e5c3ed49d61d09e2b8d7696fac03708570c9e23afbb5bfdcaa275 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:23:51,227 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:23:51,230 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:23:51,284 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:23:51,285 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:23:51,289 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:23:51,291 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:23:51,293 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:23:51,295 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:23:51,296 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:23:51,297 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:23:51,299 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:23:51,299 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:23:51,310 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:23:51,311 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:23:51,315 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:23:51,322 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:23:51,323 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:23:51,325 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:23:51,327 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:23:51,330 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:23:51,331 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:23:51,333 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:23:51,335 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:23:51,339 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:23:51,344 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:23:51,345 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:23:51,346 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:23:51,348 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:23:51,350 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:23:51,351 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:23:51,352 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:23:51,354 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:23:51,355 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:23:51,357 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:23:51,357 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:23:51,358 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:23:51,358 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:23:51,358 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:23:51,359 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:23:51,360 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:23:51,361 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-12 22:23:51,405 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:23:51,405 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:23:51,407 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:23:51,408 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:23:51,408 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:23:51,408 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:23:51,408 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:23:51,409 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 22:23:51,412 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:23:51,412 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:23:51,413 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 22:23:51,413 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 22:23:51,413 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:23:51,413 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 22:23:51,414 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 22:23:51,414 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 22:23:51,415 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:23:51,415 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 22:23:51,415 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:23:51,415 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:23:51,415 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:23:51,416 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:23:51,416 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:23:51,416 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:23:51,416 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:23:51,416 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:23:51,417 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:23:51,417 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:23:51,417 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:23:51,417 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:23:51,418 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:23:51,418 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:23:51,418 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 22:23:51,418 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 22:23:51,418 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:23:51,419 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:23:51,419 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:23:51,419 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_8855f282-5b43-4fe0-a2e7-6fde38549d60/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d62cca735e5e5c3ed49d61d09e2b8d7696fac03708570c9e23afbb5bfdcaa275 [2021-11-12 22:23:51,735 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:23:51,755 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:23:51,758 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:23:51,759 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:23:51,760 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:23:51,761 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/ldv-challenges/linux-3.8-rc1-32_7a-drivers--usb--misc--sisusbvga--sisusbvga.ko-ldv_main0_sequence_infinite_withcheck_stateful.cil.out.i [2021-11-12 22:23:51,828 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/data/3eb987879/770faccbb49244b9915f5cf68ce22b9c/FLAG0155c1bb2 [2021-11-12 22:23:52,871 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:23:52,871 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/sv-benchmarks/c/ldv-challenges/linux-3.8-rc1-32_7a-drivers--usb--misc--sisusbvga--sisusbvga.ko-ldv_main0_sequence_infinite_withcheck_stateful.cil.out.i [2021-11-12 22:23:52,927 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/data/3eb987879/770faccbb49244b9915f5cf68ce22b9c/FLAG0155c1bb2 [2021-11-12 22:23:53,214 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/data/3eb987879/770faccbb49244b9915f5cf68ce22b9c [2021-11-12 22:23:53,216 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:23:53,218 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:23:53,219 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:23:53,220 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:23:53,223 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:23:53,224 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:23:53" (1/1) ... [2021-11-12 22:23:53,225 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6dfdc4bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:23:53, skipping insertion in model container [2021-11-12 22:23:53,225 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:23:53" (1/1) ... [2021-11-12 22:23:53,233 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:23:53,401 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:23:54,917 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 22:23:54,936 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 22:23:55,075 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 22:23:55,081 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 22:23:55,172 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 22:23:55,178 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 22:23:55,457 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 22:23:55,457 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 22:23:55,458 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 22:23:55,474 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 22:23:55,478 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 22:23:55,487 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 22:23:55,501 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 22:23:55,518 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 22:23:55,539 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 22:23:55,568 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 22:23:55,588 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 22:23:55,600 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 22:23:55,611 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 22:23:55,720 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 22:23:55,726 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 22:23:55,732 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 22:23:55,738 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 22:23:55,743 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 22:23:55,751 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 22:23:55,756 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 22:23:56,583 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_8855f282-5b43-4fe0-a2e7-6fde38549d60/sv-benchmarks/c/ldv-challenges/linux-3.8-rc1-32_7a-drivers--usb--misc--sisusbvga--sisusbvga.ko-ldv_main0_sequence_infinite_withcheck_stateful.cil.out.i[361017,361030] [2021-11-12 22:23:56,693 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:23:56,801 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 22:23:56,802 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@22d67187 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:23:56, skipping insertion in model container [2021-11-12 22:23:56,802 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:23:56,802 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 22:23:56,805 INFO L158 Benchmark]: Toolchain (without parser) took 3585.37ms. Allocated memory was 123.7MB in the beginning and 167.8MB in the end (delta: 44.0MB). Free memory was 92.5MB in the beginning and 74.5MB in the end (delta: 18.0MB). Peak memory consumption was 68.0MB. Max. memory is 16.1GB. [2021-11-12 22:23:56,806 INFO L158 Benchmark]: CDTParser took 0.27ms. Allocated memory is still 123.7MB. Free memory is still 100.9MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 22:23:56,807 INFO L158 Benchmark]: CACSL2BoogieTranslator took 3582.83ms. Allocated memory was 123.7MB in the beginning and 167.8MB in the end (delta: 44.0MB). Free memory was 92.2MB in the beginning and 74.5MB in the end (delta: 17.7MB). Peak memory consumption was 68.0MB. Max. memory is 16.1GB. [2021-11-12 22:23:56,809 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27ms. Allocated memory is still 123.7MB. Free memory is still 100.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 3582.83ms. Allocated memory was 123.7MB in the beginning and 167.8MB in the end (delta: 44.0MB). Free memory was 92.2MB in the beginning and 74.5MB in the end (delta: 17.7MB). Peak memory consumption was 68.0MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 3973]: 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_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/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_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-challenges/linux-3.8-rc1-32_7a-drivers--usb--misc--sisusbvga--sisusbvga.ko-ldv_main0_sequence_infinite_withcheck_stateful.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/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_8855f282-5b43-4fe0-a2e7-6fde38549d60/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 d62cca735e5e5c3ed49d61d09e2b8d7696fac03708570c9e23afbb5bfdcaa275 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:23:59,379 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:23:59,382 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:23:59,443 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:23:59,444 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:23:59,450 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:23:59,454 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:23:59,461 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:23:59,465 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:23:59,479 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:23:59,480 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:23:59,483 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:23:59,484 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:23:59,487 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:23:59,489 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:23:59,493 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:23:59,494 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:23:59,496 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:23:59,502 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:23:59,506 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:23:59,512 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:23:59,514 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:23:59,517 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:23:59,520 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:23:59,531 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:23:59,532 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:23:59,532 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:23:59,535 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:23:59,536 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:23:59,537 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:23:59,538 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:23:59,540 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:23:59,542 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:23:59,543 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:23:59,545 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:23:59,546 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:23:59,556 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:23:59,556 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:23:59,557 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:23:59,559 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:23:59,560 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:23:59,561 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-12 22:23:59,605 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:23:59,606 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:23:59,607 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:23:59,607 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:23:59,607 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:23:59,608 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:23:59,608 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:23:59,608 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:23:59,609 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:23:59,609 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:23:59,610 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:23:59,610 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:23:59,610 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:23:59,611 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:23:59,611 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:23:59,611 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:23:59,611 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 22:23:59,612 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 22:23:59,612 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:23:59,612 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:23:59,612 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:23:59,613 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:23:59,613 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 22:23:59,613 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:23:59,614 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:23:59,614 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:23:59,614 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:23:59,614 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:23:59,615 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 22:23:59,615 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 22:23:59,615 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:23:59,615 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:23:59,616 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:23:59,616 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_8855f282-5b43-4fe0-a2e7-6fde38549d60/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d62cca735e5e5c3ed49d61d09e2b8d7696fac03708570c9e23afbb5bfdcaa275 [2021-11-12 22:24:00,030 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:24:00,052 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:24:00,054 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:24:00,056 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:24:00,057 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:24:00,058 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/ldv-challenges/linux-3.8-rc1-32_7a-drivers--usb--misc--sisusbvga--sisusbvga.ko-ldv_main0_sequence_infinite_withcheck_stateful.cil.out.i [2021-11-12 22:24:00,138 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/data/265e13160/340b6a1142294fcaa1b2b7dd555c752d/FLAGbb4eb80e6 [2021-11-12 22:24:01,355 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:24:01,356 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/sv-benchmarks/c/ldv-challenges/linux-3.8-rc1-32_7a-drivers--usb--misc--sisusbvga--sisusbvga.ko-ldv_main0_sequence_infinite_withcheck_stateful.cil.out.i [2021-11-12 22:24:01,428 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/data/265e13160/340b6a1142294fcaa1b2b7dd555c752d/FLAGbb4eb80e6 [2021-11-12 22:24:01,629 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/data/265e13160/340b6a1142294fcaa1b2b7dd555c752d [2021-11-12 22:24:01,633 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:24:01,635 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:24:01,638 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:24:01,638 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:24:01,642 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:24:01,643 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:24:01" (1/1) ... [2021-11-12 22:24:01,644 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6df07916 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:24:01, skipping insertion in model container [2021-11-12 22:24:01,644 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:24:01" (1/1) ... [2021-11-12 22:24:01,652 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:24:01,850 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:24:04,987 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_8855f282-5b43-4fe0-a2e7-6fde38549d60/sv-benchmarks/c/ldv-challenges/linux-3.8-rc1-32_7a-drivers--usb--misc--sisusbvga--sisusbvga.ko-ldv_main0_sequence_infinite_withcheck_stateful.cil.out.i[361017,361030] [2021-11-12 22:24:05,086 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:24:05,278 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 22:24:05,408 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:24:05,999 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_8855f282-5b43-4fe0-a2e7-6fde38549d60/sv-benchmarks/c/ldv-challenges/linux-3.8-rc1-32_7a-drivers--usb--misc--sisusbvga--sisusbvga.ko-ldv_main0_sequence_infinite_withcheck_stateful.cil.out.i[361017,361030] [2021-11-12 22:24:06,010 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:24:06,133 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 22:24:06,666 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_8855f282-5b43-4fe0-a2e7-6fde38549d60/sv-benchmarks/c/ldv-challenges/linux-3.8-rc1-32_7a-drivers--usb--misc--sisusbvga--sisusbvga.ko-ldv_main0_sequence_infinite_withcheck_stateful.cil.out.i[361017,361030] [2021-11-12 22:24:06,676 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:24:07,037 INFO L208 MainTranslator]: Completed translation [2021-11-12 22:24:07,038 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:24:07 WrapperNode [2021-11-12 22:24:07,039 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:24:07,040 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 22:24:07,040 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 22:24:07,041 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 22:24:07,048 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:24:07" (1/1) ... [2021-11-12 22:24:07,249 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:24:07" (1/1) ... [2021-11-12 22:24:07,605 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 22:24:07,605 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 22:24:07,606 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 22:24:07,606 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 22:24:07,616 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:24:07" (1/1) ... [2021-11-12 22:24:07,616 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:24:07" (1/1) ... [2021-11-12 22:24:07,687 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:24:07" (1/1) ... [2021-11-12 22:24:07,687 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:24:07" (1/1) ... [2021-11-12 22:24:08,086 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:24:07" (1/1) ... [2021-11-12 22:24:08,131 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:24:07" (1/1) ... [2021-11-12 22:24:08,169 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:24:07" (1/1) ... [2021-11-12 22:24:08,357 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 22:24:08,358 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 22:24:08,359 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 22:24:08,359 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 22:24:08,359 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:24:07" (1/1) ... [2021-11-12 22:24:08,367 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:24:08,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:24:08,409 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 22:24:08,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 22:24:08,459 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-12 22:24:08,460 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_intfdata [2021-11-12 22:24:08,460 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_intfdata [2021-11-12 22:24:08,460 INFO L130 BoogieDeclarations]: Found specification of procedure usb_submit_urb [2021-11-12 22:24:08,460 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_submit_urb [2021-11-12 22:24:08,460 INFO L130 BoogieDeclarations]: Found specification of procedure kref_sub [2021-11-12 22:24:08,461 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_sub [2021-11-12 22:24:08,461 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-12 22:24:08,461 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-12 22:24:08,461 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-12 22:24:08,461 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-12 22:24:08,462 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-12 22:24:08,462 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2021-11-12 22:24:08,462 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2021-11-12 22:24:08,462 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_recv_bulk_msg [2021-11-12 22:24:08,462 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_recv_bulk_msg [2021-11-12 22:24:08,463 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-12 22:24:08,463 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-12 22:24:08,463 INFO L130 BoogieDeclarations]: Found specification of procedure sisusbcon_save_screen [2021-11-12 22:24:08,463 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusbcon_save_screen [2021-11-12 22:24:08,464 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_free_buffers [2021-11-12 22:24:08,464 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_free_buffers [2021-11-12 22:24:08,464 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_disconnect [2021-11-12 22:24:08,464 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_disconnect [2021-11-12 22:24:08,464 INFO L130 BoogieDeclarations]: Found specification of procedure sisusbcon_deinit [2021-11-12 22:24:08,465 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusbcon_deinit [2021-11-12 22:24:08,465 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_write_memio_byte [2021-11-12 22:24:08,465 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_write_memio_byte [2021-11-12 22:24:08,465 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-11-12 22:24:08,465 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-11-12 22:24:08,466 INFO L130 BoogieDeclarations]: Found specification of procedure usb_fill_bulk_urb [2021-11-12 22:24:08,466 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_fill_bulk_urb [2021-11-12 22:24:08,466 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-12 22:24:08,466 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-12 22:24:08,466 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_set_cursor [2021-11-12 22:24:08,467 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_set_cursor [2021-11-12 22:24:08,467 INFO L130 BoogieDeclarations]: Found specification of procedure usb_deregister_dev [2021-11-12 22:24:08,467 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_deregister_dev [2021-11-12 22:24:08,467 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_return_value [2021-11-12 22:24:08,467 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_return_value [2021-11-12 22:24:08,468 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_write_memio_word [2021-11-12 22:24:08,468 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_write_memio_word [2021-11-12 22:24:08,468 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-12 22:24:08,468 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-12 22:24:08,468 INFO L130 BoogieDeclarations]: Found specification of procedure SiS_SetReg [2021-11-12 22:24:08,469 INFO L138 BoogieDeclarations]: Found implementation of procedure SiS_SetReg [2021-11-12 22:24:08,469 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2021-11-12 22:24:08,469 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2021-11-12 22:24:08,469 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_get_sisusb_lock_and_check [2021-11-12 22:24:08,470 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_get_sisusb_lock_and_check [2021-11-12 22:24:08,470 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 22:24:08,470 INFO L130 BoogieDeclarations]: Found specification of procedure take_over_console [2021-11-12 22:24:08,470 INFO L138 BoogieDeclarations]: Found implementation of procedure take_over_console [2021-11-12 22:24:08,470 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_sisusb_valid [2021-11-12 22:24:08,471 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_sisusb_valid [2021-11-12 22:24:08,471 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-12 22:24:08,471 INFO L130 BoogieDeclarations]: Found specification of procedure SiS_SetRegOR [2021-11-12 22:24:08,471 INFO L138 BoogieDeclarations]: Found implementation of procedure SiS_SetRegOR [2021-11-12 22:24:08,471 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_lock_of_sisusb_usb_data [2021-11-12 22:24:08,472 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_lock_of_sisusb_usb_data [2021-11-12 22:24:08,472 INFO L130 BoogieDeclarations]: Found specification of procedure __xadd_wrong_size [2021-11-12 22:24:08,472 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_check_rbc [2021-11-12 22:24:08,472 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_check_rbc [2021-11-12 22:24:08,472 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-12 22:24:08,473 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-12 22:24:08,473 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-12 22:24:08,473 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-12 22:24:08,473 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-12 22:24:08,474 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-12 22:24:08,474 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2021-11-12 22:24:08,474 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2021-11-12 22:24:08,474 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2021-11-12 22:24:08,474 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 22:24:08,475 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-12 22:24:08,475 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-12 22:24:08,475 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_outurb_available [2021-11-12 22:24:08,475 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_outurb_available [2021-11-12 22:24:08,475 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_kill_all_busy [2021-11-12 22:24:08,476 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_kill_all_busy [2021-11-12 22:24:08,476 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-11-12 22:24:08,476 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-11-12 22:24:08,476 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_intfdata [2021-11-12 22:24:08,476 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_intfdata [2021-11-12 22:24:08,477 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_getidxreg [2021-11-12 22:24:08,477 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_getidxreg [2021-11-12 22:24:08,477 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_handler_precall [2021-11-12 22:24:08,477 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_handler_precall [2021-11-12 22:24:08,477 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_urb [2021-11-12 22:24:08,478 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_urb [2021-11-12 22:24:08,478 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_writeb [2021-11-12 22:24:08,478 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_writeb [2021-11-12 22:24:08,478 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2021-11-12 22:24:08,478 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2021-11-12 22:24:08,479 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_set_default_mode [2021-11-12 22:24:08,479 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_set_default_mode [2021-11-12 22:24:08,479 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_read_memio_byte [2021-11-12 22:24:08,479 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_read_memio_byte [2021-11-12 22:24:08,479 INFO L130 BoogieDeclarations]: Found specification of procedure SiS_DisplayOn [2021-11-12 22:24:08,480 INFO L138 BoogieDeclarations]: Found implementation of procedure SiS_DisplayOn [2021-11-12 22:24:08,480 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_setidxregandor [2021-11-12 22:24:08,480 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_setidxregandor [2021-11-12 22:24:08,480 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_write_mem_bulk [2021-11-12 22:24:08,480 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_write_mem_bulk [2021-11-12 22:24:08,481 INFO L130 BoogieDeclarations]: Found specification of procedure kref_get [2021-11-12 22:24:08,481 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_get [2021-11-12 22:24:08,481 INFO L130 BoogieDeclarations]: Found specification of procedure sisusbdummycon_init [2021-11-12 22:24:08,481 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusbdummycon_init [2021-11-12 22:24:08,481 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_initialize [2021-11-12 22:24:08,482 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_initialize [2021-11-12 22:24:08,482 INFO L130 BoogieDeclarations]: Found specification of procedure SiS_GetReg [2021-11-12 22:24:08,482 INFO L138 BoogieDeclarations]: Found implementation of procedure SiS_GetReg [2021-11-12 22:24:08,482 INFO L130 BoogieDeclarations]: Found specification of procedure sisusbcon_do_font_op [2021-11-12 22:24:08,482 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusbcon_do_font_op [2021-11-12 22:24:08,483 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_init_gfxdevice [2021-11-12 22:24:08,483 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_init_gfxdevice [2021-11-12 22:24:08,483 INFO L130 BoogieDeclarations]: Found specification of procedure SiS_SetRegByte [2021-11-12 22:24:08,483 INFO L138 BoogieDeclarations]: Found implementation of procedure SiS_SetRegByte [2021-11-12 22:24:08,483 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_free_urbs [2021-11-12 22:24:08,484 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_free_urbs [2021-11-12 22:24:08,484 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-12 22:24:08,484 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-12 22:24:08,484 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_send_bridge_packet [2021-11-12 22:24:08,484 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_send_bridge_packet [2021-11-12 22:24:08,485 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2021-11-12 22:24:08,485 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2021-11-12 22:24:08,485 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2021-11-12 22:24:08,485 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2021-11-12 22:24:08,485 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_ioctl [2021-11-12 22:24:08,486 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_ioctl [2021-11-12 22:24:08,486 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_read_memio_word [2021-11-12 22:24:08,486 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_read_memio_word [2021-11-12 22:24:08,486 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_get_sisusb [2021-11-12 22:24:08,486 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_get_sisusb [2021-11-12 22:24:08,487 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-12 22:24:08,487 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-12 22:24:08,487 INFO L130 BoogieDeclarations]: Found specification of procedure sisusbcon_cursor [2021-11-12 22:24:08,487 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusbcon_cursor [2021-11-12 22:24:08,487 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_is_inactive [2021-11-12 22:24:08,488 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_is_inactive [2021-11-12 22:24:08,488 INFO L130 BoogieDeclarations]: Found specification of procedure vfree [2021-11-12 22:24:08,488 INFO L138 BoogieDeclarations]: Found implementation of procedure vfree [2021-11-12 22:24:08,488 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_clear_vram [2021-11-12 22:24:08,488 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_clear_vram [2021-11-12 22:24:08,488 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_write_pci_config [2021-11-12 22:24:08,489 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_write_pci_config [2021-11-12 22:24:08,489 INFO L130 BoogieDeclarations]: Found specification of procedure copy_to_user [2021-11-12 22:24:08,489 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_to_user [2021-11-12 22:24:08,489 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-12 22:24:08,489 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2021-11-12 22:24:08,490 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-12 22:24:08,490 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_send_bulk_msg [2021-11-12 22:24:08,490 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_send_bulk_msg [2021-11-12 22:24:08,490 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2021-11-12 22:24:08,491 INFO L130 BoogieDeclarations]: Found specification of procedure kref_put [2021-11-12 22:24:08,491 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_put [2021-11-12 22:24:08,491 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-12 22:24:08,491 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-12 22:24:08,491 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_readb [2021-11-12 22:24:08,491 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_readb [2021-11-12 22:24:08,492 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_setidxregor [2021-11-12 22:24:08,492 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_setidxregor [2021-11-12 22:24:08,492 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-12 22:24:08,492 INFO L130 BoogieDeclarations]: Found specification of procedure vmalloc [2021-11-12 22:24:08,492 INFO L138 BoogieDeclarations]: Found implementation of procedure vmalloc [2021-11-12 22:24:08,493 INFO L130 BoogieDeclarations]: Found specification of procedure copy_from_user [2021-11-12 22:24:08,493 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_from_user [2021-11-12 22:24:08,493 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_send_packet [2021-11-12 22:24:08,493 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_send_packet [2021-11-12 22:24:08,493 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_read_memio_long [2021-11-12 22:24:08,493 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_read_memio_long [2021-11-12 22:24:08,494 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_reset_text_mode [2021-11-12 22:24:08,494 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_reset_text_mode [2021-11-12 22:24:08,494 INFO L130 BoogieDeclarations]: Found specification of procedure SiSUSB_InitPtr [2021-11-12 22:24:08,494 INFO L138 BoogieDeclarations]: Found implementation of procedure SiSUSB_InitPtr [2021-11-12 22:24:08,494 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-12 22:24:08,494 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_read_pci_config [2021-11-12 22:24:08,495 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_read_pci_config [2021-11-12 22:24:08,495 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-12 22:24:08,495 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_setidxreg [2021-11-12 22:24:08,495 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_setidxreg [2021-11-12 22:24:08,495 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2021-11-12 22:24:08,495 INFO L130 BoogieDeclarations]: Found specification of procedure SiS_SetRegANDOR [2021-11-12 22:24:08,496 INFO L138 BoogieDeclarations]: Found implementation of procedure SiS_SetRegANDOR [2021-11-12 22:24:08,496 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2021-11-12 22:24:08,496 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-12 22:24:08,496 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-12 22:24:08,496 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-12 22:24:08,497 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_wait_all_out_complete [2021-11-12 22:24:08,497 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_wait_all_out_complete [2021-11-12 22:24:08,497 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2021-11-12 22:24:08,497 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2021-11-12 22:24:08,497 INFO L130 BoogieDeclarations]: Found specification of procedure SiS_SetRegAND [2021-11-12 22:24:08,497 INFO L138 BoogieDeclarations]: Found implementation of procedure SiS_SetRegAND [2021-11-12 22:24:08,498 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_setidxregand [2021-11-12 22:24:08,498 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_setidxregand [2021-11-12 22:24:08,498 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_urb [2021-11-12 22:24:08,498 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_urb [2021-11-12 22:24:08,498 INFO L130 BoogieDeclarations]: Found specification of procedure SiS_SetSegmentReg [2021-11-12 22:24:08,498 INFO L138 BoogieDeclarations]: Found implementation of procedure SiS_SetSegmentReg [2021-11-12 22:24:08,499 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_copy_memory [2021-11-12 22:24:08,499 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_copy_memory [2021-11-12 22:24:08,499 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_setreg [2021-11-12 22:24:08,499 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_setreg [2021-11-12 22:24:08,499 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_lock_of_sisusb_usb_data [2021-11-12 22:24:08,499 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_lock_of_sisusb_usb_data [2021-11-12 22:24:08,500 INFO L130 BoogieDeclarations]: Found specification of procedure sisusbcon_set_start_address [2021-11-12 22:24:08,500 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusbcon_set_start_address [2021-11-12 22:24:08,500 INFO L130 BoogieDeclarations]: Found specification of procedure prepare_to_wait [2021-11-12 22:24:08,500 INFO L138 BoogieDeclarations]: Found implementation of procedure prepare_to_wait [2021-11-12 22:24:08,500 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-11-12 22:24:08,501 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-11-12 22:24:08,501 INFO L130 BoogieDeclarations]: Found specification of procedure SiS_WriteDAC [2021-11-12 22:24:08,501 INFO L138 BoogieDeclarations]: Found implementation of procedure SiS_WriteDAC [2021-11-12 22:24:08,501 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_read_mem_bulk [2021-11-12 22:24:08,501 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_read_mem_bulk [2021-11-12 22:24:08,501 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_getreg [2021-11-12 22:24:08,502 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_getreg [2021-11-12 22:24:08,502 INFO L130 BoogieDeclarations]: Found specification of procedure SiSUSBSetMode [2021-11-12 22:24:08,502 INFO L138 BoogieDeclarations]: Found implementation of procedure SiSUSBSetMode [2021-11-12 22:24:08,502 INFO L130 BoogieDeclarations]: Found specification of procedure vc_resize [2021-11-12 22:24:08,502 INFO L138 BoogieDeclarations]: Found implementation of procedure vc_resize [2021-11-12 22:24:08,502 INFO L130 BoogieDeclarations]: Found specification of procedure sisusbcon_init [2021-11-12 22:24:08,503 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusbcon_init [2021-11-12 22:24:08,503 INFO L130 BoogieDeclarations]: Found specification of procedure schedule_timeout [2021-11-12 22:24:08,503 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule_timeout [2021-11-12 22:24:08,503 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-12 22:24:08,503 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_write_memio_long [2021-11-12 22:24:08,503 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_write_memio_long [2021-11-12 22:24:08,504 INFO L130 BoogieDeclarations]: Found specification of procedure SiS_GetRegByte [2021-11-12 22:24:08,504 INFO L138 BoogieDeclarations]: Found implementation of procedure SiS_GetRegByte [2021-11-12 22:24:08,504 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2021-11-12 22:24:08,504 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2021-11-12 22:24:08,504 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_triggersr16 [2021-11-12 22:24:08,504 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_triggersr16 [2021-11-12 22:24:08,505 INFO L130 BoogieDeclarations]: Found specification of procedure finish_wait [2021-11-12 22:24:08,505 INFO L138 BoogieDeclarations]: Found implementation of procedure finish_wait [2021-11-12 22:24:08,505 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 22:24:08,505 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 22:24:08,505 INFO L130 BoogieDeclarations]: Found specification of procedure sisusb_all_free [2021-11-12 22:24:08,505 INFO L138 BoogieDeclarations]: Found implementation of procedure sisusb_all_free [2021-11-12 22:26:33,507 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 22:26:33,509 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-12 22:26:33,516 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:26:33 BoogieIcfgContainer [2021-11-12 22:26:33,517 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 22:26:33,520 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 22:26:33,520 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 22:26:33,523 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 22:26:33,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 10:24:01" (1/3) ... [2021-11-12 22:26:33,524 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c673821 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:26:33, skipping insertion in model container [2021-11-12 22:26:33,525 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:24:07" (2/3) ... [2021-11-12 22:26:33,525 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c673821 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:26:33, skipping insertion in model container [2021-11-12 22:26:33,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:26:33" (3/3) ... [2021-11-12 22:26:33,535 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.8-rc1-32_7a-drivers--usb--misc--sisusbvga--sisusbvga.ko-ldv_main0_sequence_infinite_withcheck_stateful.cil.out.i [2021-11-12 22:26:33,541 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 22:26:33,542 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 22:26:33,614 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 22:26:33,621 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 22:26:33,621 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 22:26:33,702 INFO L276 IsEmpty]: Start isEmpty. Operand has 2753 states, 1882 states have (on average 1.3575982996811902) internal successors, (2555), 1909 states have internal predecessors, (2555), 765 states have call successors, (765), 104 states have call predecessors, (765), 104 states have return successors, (765), 761 states have call predecessors, (765), 765 states have call successors, (765) [2021-11-12 22:26:33,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-12 22:26:33,708 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:26:33,709 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:26:33,709 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:26:33,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:26:33,715 INFO L85 PathProgramCache]: Analyzing trace with hash -674524315, now seen corresponding path program 1 times [2021-11-12 22:26:33,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:26:33,745 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2093013734] [2021-11-12 22:26:33,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:26:33,746 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:26:33,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:26:33,749 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:26:33,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 22:26:41,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:26:42,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 4920 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:26:42,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:26:42,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:26:42,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:26:43,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:26:43,444 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:26:43,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2093013734] [2021-11-12 22:26:43,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2093013734] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:26:43,445 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:26:43,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-12 22:26:43,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769507730] [2021-11-12 22:26:43,448 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:26:43,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:26:43,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:26:43,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:26:43,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:26:43,489 INFO L87 Difference]: Start difference. First operand has 2753 states, 1882 states have (on average 1.3575982996811902) internal successors, (2555), 1909 states have internal predecessors, (2555), 765 states have call successors, (765), 104 states have call predecessors, (765), 104 states have return successors, (765), 761 states have call predecessors, (765), 765 states have call successors, (765) Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-12 22:26:44,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:26:44,048 INFO L93 Difference]: Finished difference Result 5497 states and 8246 transitions. [2021-11-12 22:26:44,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:26:44,051 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2021-11-12 22:26:44,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:26:44,094 INFO L225 Difference]: With dead ends: 5497 [2021-11-12 22:26:44,094 INFO L226 Difference]: Without dead ends: 2748 [2021-11-12 22:26:44,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:26:44,129 INFO L933 BasicCegarLoop]: 4075 mSDtfsCounter, 3 mSDsluCounter, 4073 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 170.87ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 8148 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 50.21ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 176.07ms IncrementalHoareTripleChecker+Time [2021-11-12 22:26:44,134 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 8148 Invalid, 8 Unknown, 0 Unchecked, 50.21ms Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 176.07ms Time] [2021-11-12 22:26:44,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2748 states. [2021-11-12 22:26:44,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2748 to 2748. [2021-11-12 22:26:44,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2748 states, 1880 states have (on average 1.3563829787234043) internal successors, (2550), 1905 states have internal predecessors, (2550), 765 states have call successors, (765), 104 states have call predecessors, (765), 102 states have return successors, (759), 755 states have call predecessors, (759), 759 states have call successors, (759) [2021-11-12 22:26:44,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2748 states to 2748 states and 4074 transitions. [2021-11-12 22:26:44,448 INFO L78 Accepts]: Start accepts. Automaton has 2748 states and 4074 transitions. Word has length 19 [2021-11-12 22:26:44,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:26:44,450 INFO L470 AbstractCegarLoop]: Abstraction has 2748 states and 4074 transitions. [2021-11-12 22:26:44,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-12 22:26:44,451 INFO L276 IsEmpty]: Start isEmpty. Operand 2748 states and 4074 transitions. [2021-11-12 22:26:44,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-12 22:26:44,453 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:26:44,453 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:26:44,628 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 22:26:44,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:26:44,671 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:26:44,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:26:44,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1163472365, now seen corresponding path program 1 times [2021-11-12 22:26:44,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:26:44,679 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [684867463] [2021-11-12 22:26:44,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:26:44,683 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:26:44,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:26:44,684 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:26:44,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 22:26:52,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:26:53,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 4930 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:26:53,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:26:54,482 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:26:54,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:26:55,630 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:26:55,631 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:26:55,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [684867463] [2021-11-12 22:26:55,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [684867463] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:26:55,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2073687994] [2021-11-12 22:26:55,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:26:55,632 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:26:55,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:26:55,648 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:26:55,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2021-11-12 22:26:57,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:26:58,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 4930 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:26:58,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:26:59,329 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 22:26:59,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:27:00,354 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 22:27:00,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2073687994] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:27:00,355 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:27:00,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-12 22:27:00,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471100017] [2021-11-12 22:27:00,356 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:27:00,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:27:00,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:27:00,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:27:00,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:27:00,357 INFO L87 Difference]: Start difference. First operand 2748 states and 4074 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-12 22:27:02,711 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.35s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:27:02,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:27:02,958 INFO L93 Difference]: Finished difference Result 2750 states and 4075 transitions. [2021-11-12 22:27:02,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:27:02,959 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-11-12 22:27:02,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:27:02,988 INFO L225 Difference]: With dead ends: 2750 [2021-11-12 22:27:02,988 INFO L226 Difference]: Without dead ends: 2747 [2021-11-12 22:27:02,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:27:02,997 INFO L933 BasicCegarLoop]: 4068 mSDtfsCounter, 4051 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2375.31ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4051 SdHoareTripleChecker+Valid, 4070 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 18.53ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2449.09ms IncrementalHoareTripleChecker+Time [2021-11-12 22:27:02,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4051 Valid, 4070 Invalid, 2 Unknown, 0 Unchecked, 18.53ms Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 1 Unknown, 0 Unchecked, 2449.09ms Time] [2021-11-12 22:27:03,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2747 states. [2021-11-12 22:27:03,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2747 to 2747. [2021-11-12 22:27:03,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2747 states, 1880 states have (on average 1.3558510638297872) internal successors, (2549), 1904 states have internal predecessors, (2549), 764 states have call successors, (764), 104 states have call predecessors, (764), 102 states have return successors, (759), 755 states have call predecessors, (759), 759 states have call successors, (759) [2021-11-12 22:27:03,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2747 states to 2747 states and 4072 transitions. [2021-11-12 22:27:03,196 INFO L78 Accepts]: Start accepts. Automaton has 2747 states and 4072 transitions. Word has length 23 [2021-11-12 22:27:03,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:27:03,196 INFO L470 AbstractCegarLoop]: Abstraction has 2747 states and 4072 transitions. [2021-11-12 22:27:03,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-12 22:27:03,197 INFO L276 IsEmpty]: Start isEmpty. Operand 2747 states and 4072 transitions. [2021-11-12 22:27:03,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 22:27:03,198 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:27:03,198 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:27:03,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 22:27:03,450 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (4)] Forceful destruction successful, exit code 0 [2021-11-12 22:27:03,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:27:03,624 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:27:03,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:27:03,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1705536210, now seen corresponding path program 1 times [2021-11-12 22:27:03,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:27:03,632 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [857710881] [2021-11-12 22:27:03,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:27:03,632 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:27:03,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:27:03,633 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:27:03,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 22:27:12,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:27:12,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 4931 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:27:12,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:27:13,718 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:27:13,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:27:14,946 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:27:14,946 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:27:14,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [857710881] [2021-11-12 22:27:14,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [857710881] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:27:14,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [248493233] [2021-11-12 22:27:14,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:27:14,947 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:27:14,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:27:14,948 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:27:14,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2021-11-12 22:27:17,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:27:17,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 4931 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:27:17,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:27:18,725 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 22:27:18,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:27:19,841 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 22:27:19,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [248493233] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:27:19,842 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:27:19,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-12 22:27:19,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295596983] [2021-11-12 22:27:19,843 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:27:19,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:27:19,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:27:19,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:27:19,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:27:19,844 INFO L87 Difference]: Start difference. First operand 2747 states and 4072 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-12 22:27:22,237 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.39s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:27:22,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:27:22,869 INFO L93 Difference]: Finished difference Result 7214 states and 10691 transitions. [2021-11-12 22:27:22,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:27:22,870 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2021-11-12 22:27:22,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:27:22,928 INFO L225 Difference]: With dead ends: 7214 [2021-11-12 22:27:22,928 INFO L226 Difference]: Without dead ends: 4484 [2021-11-12 22:27:22,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:27:22,963 INFO L933 BasicCegarLoop]: 6164 mSDtfsCounter, 2758 mSDsluCounter, 3815 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2629.51ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2758 SdHoareTripleChecker+Valid, 9979 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 35.65ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2705.12ms IncrementalHoareTripleChecker+Time [2021-11-12 22:27:22,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2758 Valid, 9979 Invalid, 14 Unknown, 0 Unchecked, 35.65ms Time], IncrementalHoareTripleChecker [5 Valid, 8 Invalid, 1 Unknown, 0 Unchecked, 2705.12ms Time] [2021-11-12 22:27:22,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4484 states. [2021-11-12 22:27:23,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4484 to 4481. [2021-11-12 22:27:23,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4481 states, 3045 states have (on average 1.3412151067323481) internal successors, (4084), 3096 states have internal predecessors, (4084), 1254 states have call successors, (1254), 180 states have call predecessors, (1254), 181 states have return successors, (1261), 1230 states have call predecessors, (1261), 1236 states have call successors, (1261) [2021-11-12 22:27:23,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4481 states to 4481 states and 6599 transitions. [2021-11-12 22:27:23,294 INFO L78 Accepts]: Start accepts. Automaton has 4481 states and 6599 transitions. Word has length 24 [2021-11-12 22:27:23,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:27:23,294 INFO L470 AbstractCegarLoop]: Abstraction has 4481 states and 6599 transitions. [2021-11-12 22:27:23,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-12 22:27:23,299 INFO L276 IsEmpty]: Start isEmpty. Operand 4481 states and 6599 transitions. [2021-11-12 22:27:23,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-12 22:27:23,300 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:27:23,301 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:27:23,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 22:27:23,555 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2021-11-12 22:27:23,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:27:23,728 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:27:23,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:27:23,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1329651088, now seen corresponding path program 1 times [2021-11-12 22:27:23,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:27:23,736 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [186235507] [2021-11-12 22:27:23,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:27:23,736 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:27:23,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:27:23,737 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:27:23,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 22:27:32,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:27:32,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 4932 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:27:32,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:27:33,755 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:27:33,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:27:34,998 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:27:34,998 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:27:34,999 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [186235507] [2021-11-12 22:27:34,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [186235507] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:27:34,999 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1826533631] [2021-11-12 22:27:34,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:27:34,999 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:27:35,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:27:35,002 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:27:35,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-12 22:27:37,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:27:37,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 4932 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:27:37,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:27:38,825 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 22:27:38,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:27:40,005 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 22:27:40,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1826533631] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:27:40,005 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:27:40,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-12 22:27:40,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993716797] [2021-11-12 22:27:40,006 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:27:40,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:27:40,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:27:40,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:27:40,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:27:40,008 INFO L87 Difference]: Start difference. First operand 4481 states and 6599 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-12 22:27:42,411 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.40s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:27:42,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:27:42,606 INFO L93 Difference]: Finished difference Result 4483 states and 6600 transitions. [2021-11-12 22:27:42,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:27:42,675 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2021-11-12 22:27:42,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:27:42,720 INFO L225 Difference]: With dead ends: 4483 [2021-11-12 22:27:42,720 INFO L226 Difference]: Without dead ends: 4472 [2021-11-12 22:27:42,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:27:42,727 INFO L933 BasicCegarLoop]: 4067 mSDtfsCounter, 4047 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2391.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4047 SdHoareTripleChecker+Valid, 4069 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.47ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2397.59ms IncrementalHoareTripleChecker+Time [2021-11-12 22:27:42,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4047 Valid, 4069 Invalid, 1 Unknown, 0 Unchecked, 13.47ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 1 Unknown, 0 Unchecked, 2397.59ms Time] [2021-11-12 22:27:42,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4472 states. [2021-11-12 22:27:43,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4472 to 4472. [2021-11-12 22:27:43,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4472 states, 3039 states have (on average 1.3395853899308983) internal successors, (4071), 3089 states have internal predecessors, (4071), 1251 states have call successors, (1251), 179 states have call predecessors, (1251), 181 states have return successors, (1260), 1229 states have call predecessors, (1260), 1235 states have call successors, (1260) [2021-11-12 22:27:43,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4472 states to 4472 states and 6582 transitions. [2021-11-12 22:27:43,075 INFO L78 Accepts]: Start accepts. Automaton has 4472 states and 6582 transitions. Word has length 25 [2021-11-12 22:27:43,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:27:43,075 INFO L470 AbstractCegarLoop]: Abstraction has 4472 states and 6582 transitions. [2021-11-12 22:27:43,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-12 22:27:43,076 INFO L276 IsEmpty]: Start isEmpty. Operand 4472 states and 6582 transitions. [2021-11-12 22:27:43,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-12 22:27:43,088 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:27:43,089 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:27:43,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 22:27:43,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-11-12 22:27:43,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:27:43,510 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:27:43,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:27:43,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1605597790, now seen corresponding path program 1 times [2021-11-12 22:27:43,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:27:43,516 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [166164725] [2021-11-12 22:27:43,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:27:43,516 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:27:43,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:27:43,518 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:27:43,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 22:27:51,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:27:52,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 5017 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:27:52,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:27:53,667 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:27:53,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:27:55,300 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 22:27:55,301 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:27:55,301 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [166164725] [2021-11-12 22:27:55,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [166164725] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:27:55,301 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [341115014] [2021-11-12 22:27:55,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:27:55,302 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:27:55,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:27:55,304 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:27:55,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-12 22:27:57,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:27:57,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 5017 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:27:57,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:27:59,568 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 22:27:59,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:28:01,312 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 22:28:01,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [341115014] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:28:01,313 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:28:01,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 10 [2021-11-12 22:28:01,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064120174] [2021-11-12 22:28:01,313 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:28:01,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:28:01,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:28:01,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:28:01,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:28:01,315 INFO L87 Difference]: Start difference. First operand 4472 states and 6582 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-12 22:28:05,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:28:05,631 INFO L93 Difference]: Finished difference Result 9455 states and 13999 transitions. [2021-11-12 22:28:05,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:28:05,636 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 50 [2021-11-12 22:28:05,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:28:05,688 INFO L225 Difference]: With dead ends: 9455 [2021-11-12 22:28:05,688 INFO L226 Difference]: Without dead ends: 5000 [2021-11-12 22:28:05,721 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:28:05,722 INFO L933 BasicCegarLoop]: 4139 mSDtfsCounter, 431 mSDsluCounter, 7886 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3894.59ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 568 SdHoareTripleChecker+Valid, 12025 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 29.89ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3981.42ms IncrementalHoareTripleChecker+Time [2021-11-12 22:28:05,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [568 Valid, 12025 Invalid, 136 Unknown, 0 Unchecked, 29.89ms Time], IncrementalHoareTripleChecker [12 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 3981.42ms Time] [2021-11-12 22:28:05,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5000 states. [2021-11-12 22:28:06,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5000 to 4946. [2021-11-12 22:28:06,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4946 states, 3389 states have (on average 1.3505458837415167) internal successors, (4577), 3453 states have internal predecessors, (4577), 1375 states have call successors, (1375), 179 states have call predecessors, (1375), 181 states have return successors, (1394), 1351 states have call predecessors, (1394), 1359 states have call successors, (1394) [2021-11-12 22:28:06,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4946 states to 4946 states and 7346 transitions. [2021-11-12 22:28:06,176 INFO L78 Accepts]: Start accepts. Automaton has 4946 states and 7346 transitions. Word has length 50 [2021-11-12 22:28:06,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:28:06,176 INFO L470 AbstractCegarLoop]: Abstraction has 4946 states and 7346 transitions. [2021-11-12 22:28:06,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-12 22:28:06,177 INFO L276 IsEmpty]: Start isEmpty. Operand 4946 states and 7346 transitions. [2021-11-12 22:28:06,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-12 22:28:06,180 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:28:06,180 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:28:06,337 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-12 22:28:06,421 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (10)] Ended with exit code 0 [2021-11-12 22:28:06,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:28:06,604 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:28:06,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:28:06,604 INFO L85 PathProgramCache]: Analyzing trace with hash 2079986282, now seen corresponding path program 1 times [2021-11-12 22:28:06,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:28:06,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [237663448] [2021-11-12 22:28:06,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:28:06,610 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:28:06,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:28:06,610 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:28:06,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-12 22:28:14,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:28:15,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 5036 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:28:15,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:28:17,253 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:28:17,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:28:19,118 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 22:28:19,119 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:28:19,119 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [237663448] [2021-11-12 22:28:19,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [237663448] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:28:19,119 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [605703452] [2021-11-12 22:28:19,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:28:19,119 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:28:19,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:28:19,120 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:28:19,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-12 22:28:21,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:28:21,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 5036 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:28:21,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:28:22,638 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 22:28:22,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:28:23,566 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 22:28:23,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [605703452] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:28:23,566 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:28:23,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-12 22:28:23,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428031025] [2021-11-12 22:28:23,567 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:28:23,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:28:23,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:28:23,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:28:23,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:28:23,569 INFO L87 Difference]: Start difference. First operand 4946 states and 7346 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-12 22:28:25,963 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.39s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:28:26,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:28:26,596 INFO L93 Difference]: Finished difference Result 9877 states and 14704 transitions. [2021-11-12 22:28:26,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:28:26,597 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 61 [2021-11-12 22:28:26,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:28:26,680 INFO L225 Difference]: With dead ends: 9877 [2021-11-12 22:28:26,681 INFO L226 Difference]: Without dead ends: 4948 [2021-11-12 22:28:26,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:28:26,729 INFO L933 BasicCegarLoop]: 4867 mSDtfsCounter, 3791 mSDsluCounter, 2752 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2590.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3791 SdHoareTripleChecker+Valid, 7619 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 19.59ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2663.67ms IncrementalHoareTripleChecker+Time [2021-11-12 22:28:26,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3791 Valid, 7619 Invalid, 9 Unknown, 0 Unchecked, 19.59ms Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 1 Unknown, 0 Unchecked, 2663.67ms Time] [2021-11-12 22:28:26,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4948 states. [2021-11-12 22:28:27,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4948 to 4910. [2021-11-12 22:28:27,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4910 states, 3363 states have (on average 1.3496877787689563) internal successors, (4539), 3425 states have internal predecessors, (4539), 1365 states have call successors, (1365), 179 states have call predecessors, (1365), 181 states have return successors, (1363), 1343 states have call predecessors, (1363), 1339 states have call successors, (1363) [2021-11-12 22:28:27,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4910 states to 4910 states and 7267 transitions. [2021-11-12 22:28:27,102 INFO L78 Accepts]: Start accepts. Automaton has 4910 states and 7267 transitions. Word has length 61 [2021-11-12 22:28:27,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:28:27,104 INFO L470 AbstractCegarLoop]: Abstraction has 4910 states and 7267 transitions. [2021-11-12 22:28:27,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-12 22:28:27,104 INFO L276 IsEmpty]: Start isEmpty. Operand 4910 states and 7267 transitions. [2021-11-12 22:28:27,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-12 22:28:27,124 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:28:27,125 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:28:27,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-12 22:28:27,367 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-11-12 22:28:27,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:28:27,540 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:28:27,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:28:27,540 INFO L85 PathProgramCache]: Analyzing trace with hash -333445840, now seen corresponding path program 1 times [2021-11-12 22:28:27,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:28:27,546 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1454206965] [2021-11-12 22:28:27,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:28:27,546 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:28:27,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:28:27,547 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:28:27,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-12 22:28:36,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:28:37,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 5226 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:28:37,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:28:41,378 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 22:28:41,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:28:44,307 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-12 22:28:44,307 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:28:44,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1454206965] [2021-11-12 22:28:44,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1454206965] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:28:44,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [365541457] [2021-11-12 22:28:44,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:28:44,308 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:28:44,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:28:44,309 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:28:44,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-12 22:28:47,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:28:47,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 5226 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:28:47,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:28:48,423 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-12 22:28:48,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:28:49,195 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-12 22:28:49,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [365541457] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:28:49,195 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:28:49,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-12 22:28:49,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508738684] [2021-11-12 22:28:49,196 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:28:49,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:28:49,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:28:49,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:28:49,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:28:49,198 INFO L87 Difference]: Start difference. First operand 4910 states and 7267 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 22:28:49,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:28:49,725 INFO L93 Difference]: Finished difference Result 9805 states and 14572 transitions. [2021-11-12 22:28:49,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:28:49,726 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 128 [2021-11-12 22:28:49,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:28:49,761 INFO L225 Difference]: With dead ends: 9805 [2021-11-12 22:28:49,761 INFO L226 Difference]: Without dead ends: 4912 [2021-11-12 22:28:49,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 508 GetRequests, 501 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:28:49,792 INFO L933 BasicCegarLoop]: 4060 mSDtfsCounter, 0 mSDsluCounter, 4053 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 251.27ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8113 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.00ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 254.12ms IncrementalHoareTripleChecker+Time [2021-11-12 22:28:49,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 8113 Invalid, 14 Unknown, 0 Unchecked, 14.00ms Time], IncrementalHoareTripleChecker [5 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 254.12ms Time] [2021-11-12 22:28:49,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4912 states. [2021-11-12 22:28:50,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4912 to 4910. [2021-11-12 22:28:50,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4910 states, 3363 states have (on average 1.3479036574487064) internal successors, (4533), 3425 states have internal predecessors, (4533), 1365 states have call successors, (1365), 179 states have call predecessors, (1365), 181 states have return successors, (1363), 1343 states have call predecessors, (1363), 1339 states have call successors, (1363) [2021-11-12 22:28:50,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4910 states to 4910 states and 7261 transitions. [2021-11-12 22:28:50,269 INFO L78 Accepts]: Start accepts. Automaton has 4910 states and 7261 transitions. Word has length 128 [2021-11-12 22:28:50,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:28:50,270 INFO L470 AbstractCegarLoop]: Abstraction has 4910 states and 7261 transitions. [2021-11-12 22:28:50,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 22:28:50,271 INFO L276 IsEmpty]: Start isEmpty. Operand 4910 states and 7261 transitions. [2021-11-12 22:28:50,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-12 22:28:50,294 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:28:50,294 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:28:50,324 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-12 22:28:50,661 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-12 22:28:50,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:28:50,712 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:28:50,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:28:50,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1290668390, now seen corresponding path program 1 times [2021-11-12 22:28:50,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:28:50,719 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [373606104] [2021-11-12 22:28:50,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:28:50,719 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:28:50,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:28:50,721 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:28:50,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-12 22:29:00,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:29:01,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 5232 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:29:01,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:04,985 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 22:29:04,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:07,990 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-12 22:29:07,990 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:29:07,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [373606104] [2021-11-12 22:29:07,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [373606104] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:29:07,991 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2098129568] [2021-11-12 22:29:07,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:29:07,991 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:29:07,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:29:07,992 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:29:07,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-12 22:29:10,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:29:10,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 5232 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:29:10,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:14,243 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-12 22:29:14,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:16,776 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-12 22:29:16,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2098129568] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:29:16,777 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:29:16,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 12 [2021-11-12 22:29:16,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371240221] [2021-11-12 22:29:16,777 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:29:16,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:29:16,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:29:16,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:29:16,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:29:16,779 INFO L87 Difference]: Start difference. First operand 4910 states and 7261 transitions. Second operand has 6 states, 6 states have (on average 20.5) internal successors, (123), 6 states have internal predecessors, (123), 4 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) [2021-11-12 22:29:18,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:29:18,761 INFO L93 Difference]: Finished difference Result 9814 states and 14517 transitions. [2021-11-12 22:29:18,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:29:18,762 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.5) internal successors, (123), 6 states have internal predecessors, (123), 4 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) Word has length 131 [2021-11-12 22:29:18,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:29:18,793 INFO L225 Difference]: With dead ends: 9814 [2021-11-12 22:29:18,794 INFO L226 Difference]: Without dead ends: 4903 [2021-11-12 22:29:18,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 522 GetRequests, 510 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-11-12 22:29:18,821 INFO L933 BasicCegarLoop]: 4068 mSDtfsCounter, 10 mSDsluCounter, 16228 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 628.02ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 20296 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 30.69ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 636.60ms IncrementalHoareTripleChecker+Time [2021-11-12 22:29:18,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 20296 Invalid, 28 Unknown, 0 Unchecked, 30.69ms Time], IncrementalHoareTripleChecker [9 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 636.60ms Time] [2021-11-12 22:29:18,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4903 states. [2021-11-12 22:29:19,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4903 to 4898. [2021-11-12 22:29:19,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4898 states, 3359 states have (on average 1.3462339982137541) internal successors, (4522), 3421 states have internal predecessors, (4522), 1357 states have call successors, (1357), 179 states have call predecessors, (1357), 181 states have return successors, (1355), 1335 states have call predecessors, (1355), 1331 states have call successors, (1355) [2021-11-12 22:29:19,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4898 states to 4898 states and 7234 transitions. [2021-11-12 22:29:19,203 INFO L78 Accepts]: Start accepts. Automaton has 4898 states and 7234 transitions. Word has length 131 [2021-11-12 22:29:19,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:29:19,204 INFO L470 AbstractCegarLoop]: Abstraction has 4898 states and 7234 transitions. [2021-11-12 22:29:19,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.5) internal successors, (123), 6 states have internal predecessors, (123), 4 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) [2021-11-12 22:29:19,204 INFO L276 IsEmpty]: Start isEmpty. Operand 4898 states and 7234 transitions. [2021-11-12 22:29:19,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-11-12 22:29:19,221 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:29:19,222 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:29:19,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2021-11-12 22:29:19,622 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-12 22:29:19,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:29:19,646 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:29:19,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:29:19,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1693989143, now seen corresponding path program 1 times [2021-11-12 22:29:19,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:29:19,653 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1509828588] [2021-11-12 22:29:19,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:29:19,654 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:29:19,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:29:19,655 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:29:19,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-12 22:29:28,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:29:29,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 5331 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:29:29,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:34,486 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-12 22:29:34,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:37,682 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-12 22:29:37,683 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:29:37,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1509828588] [2021-11-12 22:29:37,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1509828588] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:29:37,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1542148641] [2021-11-12 22:29:37,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:29:37,684 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:29:37,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:29:37,685 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:29:37,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-12 22:29:40,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:29:40,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 5331 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:29:40,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:45,908 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 22:29:45,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:49,249 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 22:29:49,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1542148641] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:29:49,250 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:29:49,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 10 [2021-11-12 22:29:49,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745151084] [2021-11-12 22:29:49,250 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:29:49,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:29:49,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:29:49,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:29:49,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:29:49,253 INFO L87 Difference]: Start difference. First operand 4898 states and 7234 transitions. Second operand has 4 states, 4 states have (on average 45.75) internal successors, (183), 4 states have internal predecessors, (183), 4 states have call successors, (45), 2 states have call predecessors, (45), 2 states have return successors, (38), 4 states have call predecessors, (38), 4 states have call successors, (38) [2021-11-12 22:29:52,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:29:52,065 INFO L93 Difference]: Finished difference Result 10763 states and 16063 transitions. [2021-11-12 22:29:52,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:29:52,066 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.75) internal successors, (183), 4 states have internal predecessors, (183), 4 states have call successors, (45), 2 states have call predecessors, (45), 2 states have return successors, (38), 4 states have call predecessors, (38), 4 states have call successors, (38) Word has length 161 [2021-11-12 22:29:52,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:29:52,106 INFO L225 Difference]: With dead ends: 10763 [2021-11-12 22:29:52,106 INFO L226 Difference]: Without dead ends: 5882 [2021-11-12 22:29:52,132 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 640 GetRequests, 632 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:29:52,133 INFO L933 BasicCegarLoop]: 4501 mSDtfsCounter, 911 mSDsluCounter, 4267 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2487.02ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1086 SdHoareTripleChecker+Valid, 8768 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.15ms SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2578.70ms IncrementalHoareTripleChecker+Time [2021-11-12 22:29:52,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1086 Valid, 8768 Invalid, 197 Unknown, 0 Unchecked, 13.15ms Time], IncrementalHoareTripleChecker [113 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 2578.70ms Time] [2021-11-12 22:29:52,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5882 states. [2021-11-12 22:29:52,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5882 to 5834. [2021-11-12 22:29:52,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5834 states, 4105 states have (on average 1.382216808769793) internal successors, (5674), 4167 states have internal predecessors, (5674), 1547 states have call successors, (1547), 179 states have call predecessors, (1547), 181 states have return successors, (1547), 1527 states have call predecessors, (1547), 1521 states have call successors, (1547) [2021-11-12 22:29:52,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5834 states to 5834 states and 8768 transitions. [2021-11-12 22:29:52,644 INFO L78 Accepts]: Start accepts. Automaton has 5834 states and 8768 transitions. Word has length 161 [2021-11-12 22:29:52,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:29:52,646 INFO L470 AbstractCegarLoop]: Abstraction has 5834 states and 8768 transitions. [2021-11-12 22:29:52,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.75) internal successors, (183), 4 states have internal predecessors, (183), 4 states have call successors, (45), 2 states have call predecessors, (45), 2 states have return successors, (38), 4 states have call predecessors, (38), 4 states have call successors, (38) [2021-11-12 22:29:52,646 INFO L276 IsEmpty]: Start isEmpty. Operand 5834 states and 8768 transitions. [2021-11-12 22:29:52,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-11-12 22:29:52,672 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:29:52,672 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:29:52,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-11-12 22:29:53,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-12 22:29:53,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:29:53,100 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:29:53,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:29:53,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1369935639, now seen corresponding path program 1 times [2021-11-12 22:29:53,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:29:53,108 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1524874759] [2021-11-12 22:29:53,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:29:53,108 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:29:53,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:29:53,109 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:29:53,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-12 22:30:03,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:30:04,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 5835 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:30:04,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:30:10,831 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-11-12 22:30:10,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:30:14,588 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-11-12 22:30:14,589 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:30:14,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1524874759] [2021-11-12 22:30:14,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1524874759] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:30:14,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1150350128] [2021-11-12 22:30:14,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:30:14,589 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:30:14,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:30:14,590 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:30:14,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-12 22:30:17,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:30:17,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 5835 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:30:17,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:30:20,841 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-12 22:30:20,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:30:22,106 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-11-12 22:30:22,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1150350128] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:30:22,106 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:30:22,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-12 22:30:22,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409574290] [2021-11-12 22:30:22,107 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:30:22,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:30:22,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:30:22,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:30:22,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:30:22,109 INFO L87 Difference]: Start difference. First operand 5834 states and 8768 transitions. Second operand has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 2 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2021-11-12 22:30:22,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:30:22,670 INFO L93 Difference]: Finished difference Result 11654 states and 17523 transitions. [2021-11-12 22:30:22,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:30:22,682 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 2 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) Word has length 199 [2021-11-12 22:30:22,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:30:22,722 INFO L225 Difference]: With dead ends: 11654 [2021-11-12 22:30:22,722 INFO L226 Difference]: Without dead ends: 5837 [2021-11-12 22:30:22,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 792 GetRequests, 785 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:30:22,754 INFO L933 BasicCegarLoop]: 4037 mSDtfsCounter, 0 mSDsluCounter, 4032 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 329.59ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8069 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.03ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 337.32ms IncrementalHoareTripleChecker+Time [2021-11-12 22:30:22,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 8069 Invalid, 6 Unknown, 0 Unchecked, 9.03ms Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 337.32ms Time] [2021-11-12 22:30:22,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5837 states. [2021-11-12 22:30:23,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5837 to 5837. [2021-11-12 22:30:23,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5837 states, 4108 states have (on average 1.381937682570594) internal successors, (5677), 4170 states have internal predecessors, (5677), 1547 states have call successors, (1547), 179 states have call predecessors, (1547), 181 states have return successors, (1547), 1527 states have call predecessors, (1547), 1521 states have call successors, (1547) [2021-11-12 22:30:23,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5837 states to 5837 states and 8771 transitions. [2021-11-12 22:30:23,301 INFO L78 Accepts]: Start accepts. Automaton has 5837 states and 8771 transitions. Word has length 199 [2021-11-12 22:30:23,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:30:23,302 INFO L470 AbstractCegarLoop]: Abstraction has 5837 states and 8771 transitions. [2021-11-12 22:30:23,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 2 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2021-11-12 22:30:23,303 INFO L276 IsEmpty]: Start isEmpty. Operand 5837 states and 8771 transitions. [2021-11-12 22:30:23,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-12 22:30:23,325 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:30:23,326 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:30:23,549 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-12 22:30:23,581 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-11-12 22:30:23,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:30:23,752 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:30:23,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:30:23,752 INFO L85 PathProgramCache]: Analyzing trace with hash 486087738, now seen corresponding path program 1 times [2021-11-12 22:30:23,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:30:23,759 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [23382816] [2021-11-12 22:30:23,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:30:23,759 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:30:23,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:30:23,760 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:30:23,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-12 22:30:34,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:30:35,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 5636 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:30:35,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:30:39,961 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-12 22:30:39,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:30:43,268 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 22:30:43,269 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:30:43,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [23382816] [2021-11-12 22:30:43,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [23382816] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:30:43,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [736994108] [2021-11-12 22:30:43,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:30:43,269 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:30:43,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:30:43,273 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:30:43,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-11-12 22:30:46,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:30:46,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 5636 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:30:46,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:30:50,754 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-12 22:30:50,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:30:52,459 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-12 22:30:52,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [736994108] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:30:52,459 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:30:52,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 10 [2021-11-12 22:30:52,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798044812] [2021-11-12 22:30:52,460 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:30:52,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:30:52,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:30:52,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:30:52,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:30:52,461 INFO L87 Difference]: Start difference. First operand 5837 states and 8771 transitions. Second operand has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 2 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2021-11-12 22:30:53,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:30:53,434 INFO L93 Difference]: Finished difference Result 11661 states and 17548 transitions. [2021-11-12 22:30:53,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:30:53,435 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 2 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) Word has length 165 [2021-11-12 22:30:53,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:30:53,474 INFO L225 Difference]: With dead ends: 11661 [2021-11-12 22:30:53,474 INFO L226 Difference]: Without dead ends: 5841 [2021-11-12 22:30:53,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 657 GetRequests, 648 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:30:53,507 INFO L933 BasicCegarLoop]: 4035 mSDtfsCounter, 2 mSDsluCounter, 8065 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 332.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 12100 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.18ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 337.80ms IncrementalHoareTripleChecker+Time [2021-11-12 22:30:53,508 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 12100 Invalid, 14 Unknown, 0 Unchecked, 12.18ms Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 337.80ms Time] [2021-11-12 22:30:53,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5841 states. [2021-11-12 22:30:53,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5841 to 5840. [2021-11-12 22:30:53,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5840 states, 4111 states have (on average 1.3816589637557772) internal successors, (5680), 4173 states have internal predecessors, (5680), 1547 states have call successors, (1547), 179 states have call predecessors, (1547), 181 states have return successors, (1547), 1527 states have call predecessors, (1547), 1521 states have call successors, (1547) [2021-11-12 22:30:54,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5840 states to 5840 states and 8774 transitions. [2021-11-12 22:30:54,022 INFO L78 Accepts]: Start accepts. Automaton has 5840 states and 8774 transitions. Word has length 165 [2021-11-12 22:30:54,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:30:54,022 INFO L470 AbstractCegarLoop]: Abstraction has 5840 states and 8774 transitions. [2021-11-12 22:30:54,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 2 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2021-11-12 22:30:54,023 INFO L276 IsEmpty]: Start isEmpty. Operand 5840 states and 8774 transitions. [2021-11-12 22:30:54,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-11-12 22:30:54,045 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:30:54,046 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:30:54,263 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Forcibly destroying the process [2021-11-12 22:30:54,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-12 22:30:54,297 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2021-11-12 22:30:54,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:30:54,469 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:30:54,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:30:54,470 INFO L85 PathProgramCache]: Analyzing trace with hash -530901977, now seen corresponding path program 1 times [2021-11-12 22:30:54,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:30:54,479 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [828993432] [2021-11-12 22:30:54,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:30:54,480 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:30:54,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:30:54,481 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:30:54,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-12 22:31:05,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:31:06,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 5838 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:31:06,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:31:12,022 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-11-12 22:31:12,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:31:15,863 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-11-12 22:31:15,864 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:31:15,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [828993432] [2021-11-12 22:31:15,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [828993432] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:31:15,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [501065455] [2021-11-12 22:31:15,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:31:15,865 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:31:15,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:31:15,872 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:31:15,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-12 22:31:19,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:31:19,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 5838 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:31:19,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:31:21,251 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-11-12 22:31:21,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:31:23,447 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-11-12 22:31:23,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [501065455] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:31:23,448 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:31:23,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 11 [2021-11-12 22:31:23,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324786060] [2021-11-12 22:31:23,448 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:31:23,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:31:23,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:31:23,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:31:23,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:31:23,450 INFO L87 Difference]: Start difference. First operand 5840 states and 8774 transitions. Second operand has 5 states, 5 states have (on average 25.2) internal successors, (126), 5 states have internal predecessors, (126), 3 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2021-11-12 22:31:25,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:31:25,994 INFO L93 Difference]: Finished difference Result 11702 states and 17621 transitions. [2021-11-12 22:31:25,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:31:25,995 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.2) internal successors, (126), 5 states have internal predecessors, (126), 3 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) Word has length 199 [2021-11-12 22:31:25,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:31:26,033 INFO L225 Difference]: With dead ends: 11702 [2021-11-12 22:31:26,034 INFO L226 Difference]: Without dead ends: 5865 [2021-11-12 22:31:26,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 793 GetRequests, 783 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:31:26,065 INFO L933 BasicCegarLoop]: 4060 mSDtfsCounter, 157 mSDsluCounter, 11706 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1855.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 15766 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 24.35ms SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1909.95ms IncrementalHoareTripleChecker+Time [2021-11-12 22:31:26,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 15766 Invalid, 87 Unknown, 0 Unchecked, 24.35ms Time], IncrementalHoareTripleChecker [22 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 1909.95ms Time] [2021-11-12 22:31:26,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5865 states. [2021-11-12 22:31:26,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5865 to 5865. [2021-11-12 22:31:26,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5865 states, 4132 states have (on average 1.3816553727008714) internal successors, (5709), 4198 states have internal predecessors, (5709), 1551 states have call successors, (1551), 179 states have call predecessors, (1551), 181 states have return successors, (1553), 1527 states have call predecessors, (1553), 1525 states have call successors, (1553) [2021-11-12 22:31:26,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5865 states to 5865 states and 8813 transitions. [2021-11-12 22:31:26,555 INFO L78 Accepts]: Start accepts. Automaton has 5865 states and 8813 transitions. Word has length 199 [2021-11-12 22:31:26,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:31:26,556 INFO L470 AbstractCegarLoop]: Abstraction has 5865 states and 8813 transitions. [2021-11-12 22:31:26,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.2) internal successors, (126), 5 states have internal predecessors, (126), 3 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2021-11-12 22:31:26,557 INFO L276 IsEmpty]: Start isEmpty. Operand 5865 states and 8813 transitions. [2021-11-12 22:31:26,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-11-12 22:31:26,590 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:31:26,591 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:31:26,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-11-12 22:31:26,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-12 22:31:27,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:31:27,012 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:31:27,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:31:27,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1063307564, now seen corresponding path program 1 times [2021-11-12 22:31:27,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:31:27,022 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [177757337] [2021-11-12 22:31:27,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:31:27,023 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:31:27,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:31:27,024 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:31:27,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-12 22:31:36,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:31:37,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 5368 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:31:37,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:31:43,588 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-12 22:31:43,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:31:47,421 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-12 22:31:47,421 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:31:47,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [177757337] [2021-11-12 22:31:47,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [177757337] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:31:47,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [930518549] [2021-11-12 22:31:47,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:31:47,422 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:31:47,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:31:47,448 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:31:47,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-12 22:31:50,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:31:50,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 5368 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:31:50,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:31:54,233 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-12 22:31:54,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:31:56,121 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-12 22:31:56,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [930518549] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:31:56,122 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:31:56,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-12 22:31:56,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859184619] [2021-11-12 22:31:56,122 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:31:56,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:31:56,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:31:56,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:31:56,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:31:56,124 INFO L87 Difference]: Start difference. First operand 5865 states and 8813 transitions. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 2 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (38), 2 states have call predecessors, (38), 2 states have call successors, (38) [2021-11-12 22:31:56,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:31:56,526 INFO L93 Difference]: Finished difference Result 11716 states and 17610 transitions. [2021-11-12 22:31:56,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:31:56,527 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 2 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (38), 2 states have call predecessors, (38), 2 states have call successors, (38) Word has length 189 [2021-11-12 22:31:56,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:31:56,560 INFO L225 Difference]: With dead ends: 11716 [2021-11-12 22:31:56,561 INFO L226 Difference]: Without dead ends: 5865 [2021-11-12 22:31:56,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 752 GetRequests, 745 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:31:56,588 INFO L933 BasicCegarLoop]: 4030 mSDtfsCounter, 0 mSDsluCounter, 4025 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 125.42ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8055 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.27ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 129.43ms IncrementalHoareTripleChecker+Time [2021-11-12 22:31:56,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 8055 Invalid, 4 Unknown, 0 Unchecked, 9.27ms Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 129.43ms Time] [2021-11-12 22:31:56,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5865 states. [2021-11-12 22:31:56,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5865 to 5865. [2021-11-12 22:31:56,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5865 states, 4132 states have (on average 1.3809293320425944) internal successors, (5706), 4198 states have internal predecessors, (5706), 1551 states have call successors, (1551), 179 states have call predecessors, (1551), 181 states have return successors, (1553), 1527 states have call predecessors, (1553), 1525 states have call successors, (1553) [2021-11-12 22:31:57,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5865 states to 5865 states and 8810 transitions. [2021-11-12 22:31:57,014 INFO L78 Accepts]: Start accepts. Automaton has 5865 states and 8810 transitions. Word has length 189 [2021-11-12 22:31:57,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:31:57,015 INFO L470 AbstractCegarLoop]: Abstraction has 5865 states and 8810 transitions. [2021-11-12 22:31:57,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 2 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (38), 2 states have call predecessors, (38), 2 states have call successors, (38) [2021-11-12 22:31:57,016 INFO L276 IsEmpty]: Start isEmpty. Operand 5865 states and 8810 transitions. [2021-11-12 22:31:57,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-11-12 22:31:57,059 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:31:57,059 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:31:57,086 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2021-11-12 22:31:57,486 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Forcibly destroying the process [2021-11-12 22:31:57,500 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-12 22:31:57,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:31:57,501 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:31:57,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:31:57,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1648079214, now seen corresponding path program 1 times [2021-11-12 22:31:57,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:31:57,512 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [705951606] [2021-11-12 22:31:57,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:31:57,512 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:31:57,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:31:57,514 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:31:57,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-12 22:32:07,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:32:08,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 5370 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:32:08,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:32:13,976 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-12 22:32:13,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:32:17,466 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-12 22:32:17,466 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:32:17,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [705951606] [2021-11-12 22:32:17,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [705951606] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:32:17,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1650758837] [2021-11-12 22:32:17,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:32:17,467 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:32:17,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:32:17,470 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:32:17,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-11-12 22:32:20,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:32:20,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 5370 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:32:20,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:32:24,710 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-12 22:32:24,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:32:27,132 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-12 22:32:27,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1650758837] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:32:27,133 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:32:27,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-12 22:32:27,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079762305] [2021-11-12 22:32:27,134 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:32:27,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:32:27,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:32:27,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:32:27,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:32:27,135 INFO L87 Difference]: Start difference. First operand 5865 states and 8810 transitions. Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 2 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) [2021-11-12 22:32:27,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:32:27,641 INFO L93 Difference]: Finished difference Result 11714 states and 17644 transitions. [2021-11-12 22:32:27,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:32:27,642 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 2 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) Word has length 189 [2021-11-12 22:32:27,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:32:27,674 INFO L225 Difference]: With dead ends: 11714 [2021-11-12 22:32:27,675 INFO L226 Difference]: Without dead ends: 5866 [2021-11-12 22:32:27,703 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 752 GetRequests, 745 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:32:27,704 INFO L933 BasicCegarLoop]: 4023 mSDtfsCounter, 0 mSDsluCounter, 4017 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 217.67ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8040 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.90ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 220.25ms IncrementalHoareTripleChecker+Time [2021-11-12 22:32:27,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 8040 Invalid, 13 Unknown, 0 Unchecked, 9.90ms Time], IncrementalHoareTripleChecker [5 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 220.25ms Time] [2021-11-12 22:32:27,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5866 states. [2021-11-12 22:32:28,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5866 to 5865. [2021-11-12 22:32:28,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5865 states, 4132 states have (on average 1.3802032913843176) internal successors, (5703), 4198 states have internal predecessors, (5703), 1551 states have call successors, (1551), 179 states have call predecessors, (1551), 181 states have return successors, (1553), 1527 states have call predecessors, (1553), 1525 states have call successors, (1553) [2021-11-12 22:32:28,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5865 states to 5865 states and 8807 transitions. [2021-11-12 22:32:28,133 INFO L78 Accepts]: Start accepts. Automaton has 5865 states and 8807 transitions. Word has length 189 [2021-11-12 22:32:28,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:32:28,134 INFO L470 AbstractCegarLoop]: Abstraction has 5865 states and 8807 transitions. [2021-11-12 22:32:28,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 2 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) [2021-11-12 22:32:28,135 INFO L276 IsEmpty]: Start isEmpty. Operand 5865 states and 8807 transitions. [2021-11-12 22:32:28,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-11-12 22:32:28,166 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:32:28,166 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:32:28,337 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2021-11-12 22:32:28,401 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (28)] Ended with exit code 0 [2021-11-12 22:32:28,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:32:28,580 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:32:28,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:32:28,581 INFO L85 PathProgramCache]: Analyzing trace with hash 814590285, now seen corresponding path program 1 times [2021-11-12 22:32:28,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:32:28,588 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [543855050] [2021-11-12 22:32:28,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:32:28,588 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:32:28,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:32:28,590 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:32:28,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-12 22:32:38,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:32:38,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 5442 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:32:38,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:32:44,682 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-12 22:32:44,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:32:48,432 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-12 22:32:48,432 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:32:48,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [543855050] [2021-11-12 22:32:48,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [543855050] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:32:48,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [410135962] [2021-11-12 22:32:48,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:32:48,434 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:32:48,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:32:48,448 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:32:48,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-11-12 22:32:51,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:32:51,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 5442 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:32:51,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:32:56,563 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 22:32:56,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:32:59,878 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-12 22:32:59,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [410135962] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:32:59,878 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:32:59,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 12 [2021-11-12 22:32:59,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503404716] [2021-11-12 22:32:59,879 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:32:59,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:32:59,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:32:59,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:32:59,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:32:59,880 INFO L87 Difference]: Start difference. First operand 5865 states and 8807 transitions. Second operand has 6 states, 6 states have (on average 32.0) internal successors, (192), 6 states have internal predecessors, (192), 4 states have call successors, (47), 2 states have call predecessors, (47), 2 states have return successors, (40), 4 states have call predecessors, (40), 4 states have call successors, (40) [2021-11-12 22:33:01,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:33:01,038 INFO L93 Difference]: Finished difference Result 11753 states and 17646 transitions. [2021-11-12 22:33:01,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:33:01,039 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 32.0) internal successors, (192), 6 states have internal predecessors, (192), 4 states have call successors, (47), 2 states have call predecessors, (47), 2 states have return successors, (40), 4 states have call predecessors, (40), 4 states have call successors, (40) Word has length 196 [2021-11-12 22:33:01,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:33:01,073 INFO L225 Difference]: With dead ends: 11753 [2021-11-12 22:33:01,073 INFO L226 Difference]: Without dead ends: 5890 [2021-11-12 22:33:01,103 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 781 GetRequests, 770 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:33:01,104 INFO L933 BasicCegarLoop]: 4031 mSDtfsCounter, 21 mSDsluCounter, 12076 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 474.18ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 16107 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.16ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 482.68ms IncrementalHoareTripleChecker+Time [2021-11-12 22:33:01,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 16107 Invalid, 23 Unknown, 0 Unchecked, 16.16ms Time], IncrementalHoareTripleChecker [6 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 482.68ms Time] [2021-11-12 22:33:01,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5890 states. [2021-11-12 22:33:01,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5890 to 5870. [2021-11-12 22:33:01,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5870 states, 4136 states have (on average 1.379110251450677) internal successors, (5704), 4202 states have internal predecessors, (5704), 1552 states have call successors, (1552), 179 states have call predecessors, (1552), 181 states have return successors, (1554), 1528 states have call predecessors, (1554), 1526 states have call successors, (1554) [2021-11-12 22:33:01,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5870 states to 5870 states and 8810 transitions. [2021-11-12 22:33:01,596 INFO L78 Accepts]: Start accepts. Automaton has 5870 states and 8810 transitions. Word has length 196 [2021-11-12 22:33:01,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:33:01,596 INFO L470 AbstractCegarLoop]: Abstraction has 5870 states and 8810 transitions. [2021-11-12 22:33:01,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 32.0) internal successors, (192), 6 states have internal predecessors, (192), 4 states have call successors, (47), 2 states have call predecessors, (47), 2 states have return successors, (40), 4 states have call predecessors, (40), 4 states have call successors, (40) [2021-11-12 22:33:01,597 INFO L276 IsEmpty]: Start isEmpty. Operand 5870 states and 8810 transitions. [2021-11-12 22:33:01,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-11-12 22:33:01,621 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:33:01,622 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:33:01,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-12 22:33:01,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2021-11-12 22:33:02,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:33:02,036 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:33:02,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:33:02,036 INFO L85 PathProgramCache]: Analyzing trace with hash 2015608621, now seen corresponding path program 1 times [2021-11-12 22:33:02,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:33:02,047 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1395428953] [2021-11-12 22:33:02,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:33:02,048 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:33:02,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:33:02,049 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:33:02,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-12 22:33:11,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:33:12,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 5374 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:33:12,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:33:18,421 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-12 22:33:18,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:33:21,963 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-12 22:33:21,963 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:33:21,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1395428953] [2021-11-12 22:33:21,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1395428953] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:33:21,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1794647828] [2021-11-12 22:33:21,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:33:21,964 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:33:21,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:33:21,965 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:33:21,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2021-11-12 22:33:24,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:33:24,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 5374 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 22:33:24,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:33:29,127 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-12 22:33:29,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:33:33,830 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-12 22:33:33,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1794647828] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:33:33,831 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:33:33,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [5, 5] total 18 [2021-11-12 22:33:33,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253386871] [2021-11-12 22:33:33,831 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:33:33,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 22:33:33,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:33:33,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 22:33:33,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-11-12 22:33:33,832 INFO L87 Difference]: Start difference. First operand 5870 states and 8810 transitions. Second operand has 12 states, 10 states have (on average 13.5) internal successors, (135), 8 states have internal predecessors, (135), 6 states have call successors, (36), 8 states have call predecessors, (36), 2 states have return successors, (27), 4 states have call predecessors, (27), 4 states have call successors, (27) [2021-11-12 22:33:38,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:33:38,173 INFO L93 Difference]: Finished difference Result 11015 states and 16536 transitions. [2021-11-12 22:33:38,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:33:38,175 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 13.5) internal successors, (135), 8 states have internal predecessors, (135), 6 states have call successors, (36), 8 states have call predecessors, (36), 2 states have return successors, (27), 4 states have call predecessors, (27), 4 states have call successors, (27) Word has length 191 [2021-11-12 22:33:38,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:33:38,200 INFO L225 Difference]: With dead ends: 11015 [2021-11-12 22:33:38,200 INFO L226 Difference]: Without dead ends: 5162 [2021-11-12 22:33:38,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 762 GetRequests, 744 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-11-12 22:33:38,227 INFO L933 BasicCegarLoop]: 3916 mSDtfsCounter, 45 mSDsluCounter, 39044 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2893.85ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 42960 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 44.15ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2924.33ms IncrementalHoareTripleChecker+Time [2021-11-12 22:33:38,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 42960 Invalid, 116 Unknown, 0 Unchecked, 44.15ms Time], IncrementalHoareTripleChecker [12 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 2924.33ms Time] [2021-11-12 22:33:38,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5162 states. [2021-11-12 22:33:38,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5162 to 5162. [2021-11-12 22:33:38,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5162 states, 3592 states have (on average 1.3660913140311803) internal successors, (4907), 3638 states have internal predecessors, (4907), 1408 states have call successors, (1408), 163 states have call predecessors, (1408), 161 states have return successors, (1408), 1389 states have call predecessors, (1408), 1394 states have call successors, (1408) [2021-11-12 22:33:38,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5162 states to 5162 states and 7723 transitions. [2021-11-12 22:33:38,641 INFO L78 Accepts]: Start accepts. Automaton has 5162 states and 7723 transitions. Word has length 191 [2021-11-12 22:33:38,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:33:38,642 INFO L470 AbstractCegarLoop]: Abstraction has 5162 states and 7723 transitions. [2021-11-12 22:33:38,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 13.5) internal successors, (135), 8 states have internal predecessors, (135), 6 states have call successors, (36), 8 states have call predecessors, (36), 2 states have return successors, (27), 4 states have call predecessors, (27), 4 states have call successors, (27) [2021-11-12 22:33:38,642 INFO L276 IsEmpty]: Start isEmpty. Operand 5162 states and 7723 transitions. [2021-11-12 22:33:38,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1026 [2021-11-12 22:33:38,714 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:33:38,715 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 14, 14, 14, 14, 14, 14, 14, 14, 7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:33:38,922 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (31)] Ended with exit code 0 [2021-11-12 22:33:38,958 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (32)] Ended with exit code 0 [2021-11-12 22:33:39,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:33:39,140 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:33:39,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:33:39,140 INFO L85 PathProgramCache]: Analyzing trace with hash 193323677, now seen corresponding path program 1 times [2021-11-12 22:33:39,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:33:39,151 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1024315497] [2021-11-12 22:33:39,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:33:39,151 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:33:39,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:33:39,152 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:33:39,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-12 22:33:55,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:33:56,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 9769 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:33:56,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:34:25,496 INFO L134 CoverageAnalysis]: Checked inductivity of 9827 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9823 trivial. 0 not checked. [2021-11-12 22:34:25,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:34:33,378 INFO L134 CoverageAnalysis]: Checked inductivity of 9827 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 9817 trivial. 0 not checked. [2021-11-12 22:34:33,378 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:34:33,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1024315497] [2021-11-12 22:34:33,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1024315497] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:34:33,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [149734767] [2021-11-12 22:34:33,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:34:33,379 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:34:33,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:34:33,380 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:34:33,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2021-11-12 22:34:38,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:34:38,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 9769 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:34:38,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:34:49,243 INFO L134 CoverageAnalysis]: Checked inductivity of 9827 backedges. 4122 proven. 0 refuted. 0 times theorem prover too weak. 5705 trivial. 0 not checked. [2021-11-12 22:34:49,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:34:54,544 INFO L134 CoverageAnalysis]: Checked inductivity of 9827 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9825 trivial. 0 not checked. [2021-11-12 22:34:54,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [149734767] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:34:54,544 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:34:54,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-12 22:34:54,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195386680] [2021-11-12 22:34:54,546 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:34:54,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:34:54,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:34:54,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:34:54,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:34:54,549 INFO L87 Difference]: Start difference. First operand 5162 states and 7723 transitions. Second operand has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 3 states have call successors, (55), 2 states have call predecessors, (55), 2 states have return successors, (50), 3 states have call predecessors, (50), 3 states have call successors, (50) [2021-11-12 22:34:55,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:34:55,094 INFO L93 Difference]: Finished difference Result 10541 states and 15848 transitions. [2021-11-12 22:34:55,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:34:55,094 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 3 states have call successors, (55), 2 states have call predecessors, (55), 2 states have return successors, (50), 3 states have call predecessors, (50), 3 states have call successors, (50) Word has length 1025 [2021-11-12 22:34:55,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:34:55,120 INFO L225 Difference]: With dead ends: 10541 [2021-11-12 22:34:55,120 INFO L226 Difference]: Without dead ends: 5396 [2021-11-12 22:34:55,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4096 GetRequests, 4089 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:34:55,141 INFO L933 BasicCegarLoop]: 4053 mSDtfsCounter, 94 mSDsluCounter, 3931 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 307.26ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 7984 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.31ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 315.78ms IncrementalHoareTripleChecker+Time [2021-11-12 22:34:55,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 7984 Invalid, 15 Unknown, 0 Unchecked, 10.31ms Time], IncrementalHoareTripleChecker [5 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 315.78ms Time] [2021-11-12 22:34:55,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5396 states. [2021-11-12 22:34:55,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5396 to 5228. [2021-11-12 22:34:55,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5228 states, 3638 states have (on average 1.3658603628367234) internal successors, (4969), 3684 states have internal predecessors, (4969), 1428 states have call successors, (1428), 163 states have call predecessors, (1428), 161 states have return successors, (1428), 1409 states have call predecessors, (1428), 1414 states have call successors, (1428) [2021-11-12 22:34:55,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5228 states to 5228 states and 7825 transitions. [2021-11-12 22:34:55,624 INFO L78 Accepts]: Start accepts. Automaton has 5228 states and 7825 transitions. Word has length 1025 [2021-11-12 22:34:55,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:34:55,627 INFO L470 AbstractCegarLoop]: Abstraction has 5228 states and 7825 transitions. [2021-11-12 22:34:55,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 3 states have call successors, (55), 2 states have call predecessors, (55), 2 states have return successors, (50), 3 states have call predecessors, (50), 3 states have call successors, (50) [2021-11-12 22:34:55,627 INFO L276 IsEmpty]: Start isEmpty. Operand 5228 states and 7825 transitions. [2021-11-12 22:34:55,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 969 [2021-11-12 22:34:55,703 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:34:55,704 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 14, 14, 14, 14, 14, 14, 14, 14, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:34:55,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (34)] Forceful destruction successful, exit code 0 [2021-11-12 22:34:56,131 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (33)] Forcibly destroying the process [2021-11-12 22:34:56,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 137 [2021-11-12 22:34:56,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:34:56,247 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:34:56,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:34:56,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1175007381, now seen corresponding path program 1 times [2021-11-12 22:34:56,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:34:56,269 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [115085122] [2021-11-12 22:34:56,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:34:56,270 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:34:56,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:34:56,271 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:34:56,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-12 22:35:11,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:35:12,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 9428 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:35:12,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:35:39,675 INFO L134 CoverageAnalysis]: Checked inductivity of 9721 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 9715 trivial. 0 not checked. [2021-11-12 22:35:39,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:35:46,322 INFO L134 CoverageAnalysis]: Checked inductivity of 9721 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 9715 trivial. 0 not checked. [2021-11-12 22:35:46,322 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:35:46,322 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [115085122] [2021-11-12 22:35:46,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [115085122] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:35:46,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1409349394] [2021-11-12 22:35:46,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:35:46,323 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:35:46,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:35:46,326 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:35:46,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2021-11-12 22:35:50,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:35:51,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 9428 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:35:51,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:36:15,874 INFO L134 CoverageAnalysis]: Checked inductivity of 9721 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9719 trivial. 0 not checked. [2021-11-12 22:36:15,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:36:20,349 INFO L134 CoverageAnalysis]: Checked inductivity of 9721 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9719 trivial. 0 not checked. [2021-11-12 22:36:20,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1409349394] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:36:20,349 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:36:20,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-12 22:36:20,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681108044] [2021-11-12 22:36:20,351 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:36:20,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:36:20,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:36:20,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:36:20,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:36:20,405 INFO L87 Difference]: Start difference. First operand 5228 states and 7825 transitions. Second operand has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 2 states have call successors, (65), 2 states have call predecessors, (65), 2 states have return successors, (59), 2 states have call predecessors, (59), 2 states have call successors, (59) [2021-11-12 22:36:20,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:36:20,746 INFO L93 Difference]: Finished difference Result 10440 states and 15651 transitions. [2021-11-12 22:36:20,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:36:20,747 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 2 states have call successors, (65), 2 states have call predecessors, (65), 2 states have return successors, (59), 2 states have call predecessors, (59), 2 states have call successors, (59) Word has length 968 [2021-11-12 22:36:20,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:36:20,776 INFO L225 Difference]: With dead ends: 10440 [2021-11-12 22:36:20,776 INFO L226 Difference]: Without dead ends: 5229 [2021-11-12 22:36:20,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3868 GetRequests, 3861 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:36:20,804 INFO L933 BasicCegarLoop]: 3927 mSDtfsCounter, 0 mSDsluCounter, 3922 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 161.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 7849 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.42ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 164.08ms IncrementalHoareTripleChecker+Time [2021-11-12 22:36:20,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 7849 Invalid, 6 Unknown, 0 Unchecked, 7.42ms Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 164.08ms Time] [2021-11-12 22:36:20,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5229 states. [2021-11-12 22:36:21,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5229 to 5229. [2021-11-12 22:36:21,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5229 states, 3639 states have (on average 1.3657598241275075) internal successors, (4970), 3685 states have internal predecessors, (4970), 1428 states have call successors, (1428), 163 states have call predecessors, (1428), 161 states have return successors, (1428), 1409 states have call predecessors, (1428), 1414 states have call successors, (1428) [2021-11-12 22:36:21,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5229 states to 5229 states and 7826 transitions. [2021-11-12 22:36:21,178 INFO L78 Accepts]: Start accepts. Automaton has 5229 states and 7826 transitions. Word has length 968 [2021-11-12 22:36:21,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:36:21,179 INFO L470 AbstractCegarLoop]: Abstraction has 5229 states and 7826 transitions. [2021-11-12 22:36:21,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 2 states have call successors, (65), 2 states have call predecessors, (65), 2 states have return successors, (59), 2 states have call predecessors, (59), 2 states have call successors, (59) [2021-11-12 22:36:21,180 INFO L276 IsEmpty]: Start isEmpty. Operand 5229 states and 7826 transitions. [2021-11-12 22:36:21,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 964 [2021-11-12 22:36:21,218 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:36:21,219 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 14, 14, 14, 14, 14, 14, 14, 14, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:36:21,435 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (35)] Forcibly destroying the process [2021-11-12 22:36:21,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-11-12 22:36:21,528 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (36)] Forceful destruction successful, exit code 0 [2021-11-12 22:36:21,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:36:21,702 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:36:21,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:36:21,703 INFO L85 PathProgramCache]: Analyzing trace with hash 198361314, now seen corresponding path program 1 times [2021-11-12 22:36:21,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:36:21,712 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [886241843] [2021-11-12 22:36:21,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:36:21,713 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:36:21,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:36:21,714 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:36:21,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8855f282-5b43-4fe0-a2e7-6fde38549d60/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-11-12 22:36:36,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:36:37,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 9419 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:36:37,967 INFO L286 TraceCheckSpWp]: Computing forward predicates...