./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-063f96c-1-144_1a-drivers--mmc--host--vub300.ko.unsigned-entry_point_ldv-val-v0.8.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/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_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-063f96c-1-144_1a-drivers--mmc--host--vub300.ko.unsigned-entry_point_ldv-val-v0.8.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/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_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/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 1f258bb699a014f11eb0babe874a45670072f33ce1154e31a2f0110b34e4ef74 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:27:09,451 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:27:09,453 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:27:09,497 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:27:09,497 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:27:09,499 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:27:09,501 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:27:09,504 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:27:09,506 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:27:09,507 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:27:09,509 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:27:09,510 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:27:09,511 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:27:09,512 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:27:09,514 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:27:09,516 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:27:09,517 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:27:09,518 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:27:09,521 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:27:09,523 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:27:09,526 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:27:09,531 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:27:09,534 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:27:09,538 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:27:09,544 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:27:09,550 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:27:09,550 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:27:09,551 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:27:09,554 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:27:09,556 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:27:09,556 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:27:09,557 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:27:09,558 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:27:09,559 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:27:09,561 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:27:09,562 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:27:09,564 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:27:09,565 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:27:09,565 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:27:09,566 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:27:09,570 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:27:09,571 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-12 23:27:09,613 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:27:09,617 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:27:09,618 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:27:09,619 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:27:09,619 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:27:09,619 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:27:09,619 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:27:09,620 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:27:09,620 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:27:09,620 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:27:09,621 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:27:09,622 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:27:09,622 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:27:09,622 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:27:09,623 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:27:09,623 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:27:09,624 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:27:09,624 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:27:09,624 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:27:09,625 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:27:09,625 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:27:09,625 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:27:09,625 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:27:09,625 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:27:09,626 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:27:09,626 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:27:09,626 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:27:09,626 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:27:09,627 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:27:09,627 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:27:09,627 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:27:09,627 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:27:09,628 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:27:09,628 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:27:09,628 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:27:09,629 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:27:09,629 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:27:09,629 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_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1f258bb699a014f11eb0babe874a45670072f33ce1154e31a2f0110b34e4ef74 [2021-11-12 23:27:09,937 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:27:09,958 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:27:09,961 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:27:09,962 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:27:09,963 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:27:09,964 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-063f96c-1-144_1a-drivers--mmc--host--vub300.ko.unsigned-entry_point_ldv-val-v0.8.cil.out.i [2021-11-12 23:27:10,048 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/data/9bbdc53e6/fe8ba89f705f4861a2144343c5952fed/FLAG104bae7dd [2021-11-12 23:27:10,901 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:27:10,902 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-063f96c-1-144_1a-drivers--mmc--host--vub300.ko.unsigned-entry_point_ldv-val-v0.8.cil.out.i [2021-11-12 23:27:10,942 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/data/9bbdc53e6/fe8ba89f705f4861a2144343c5952fed/FLAG104bae7dd [2021-11-12 23:27:11,387 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/data/9bbdc53e6/fe8ba89f705f4861a2144343c5952fed [2021-11-12 23:27:11,389 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:27:11,391 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:27:11,408 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:27:11,409 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:27:11,412 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:27:11,412 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:27:11" (1/1) ... [2021-11-12 23:27:11,414 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1be39905 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:27:11, skipping insertion in model container [2021-11-12 23:27:11,414 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:27:11" (1/1) ... [2021-11-12 23:27:11,421 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:27:11,558 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:27:12,819 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 23:27:12,824 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 23:27:12,907 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 23:27:12,914 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 23:27:12,933 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 23:27:12,940 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 23:27:13,085 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 23:27:13,158 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 23:27:13,204 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 23:27:13,239 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 23:27:13,249 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 23:27:13,253 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 23:27:13,261 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 23:27:13,279 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 23:27:13,313 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 23:27:13,320 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 23:27:13,325 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 23:27:13,334 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 23:27:13,339 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 23:27:13,380 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 23:27:13,390 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 23:27:13,421 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 23:27:13,423 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 23:27:13,424 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 23:27:13,425 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 23:27:13,447 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_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-063f96c-1-144_1a-drivers--mmc--host--vub300.ko.unsigned-entry_point_ldv-val-v0.8.cil.out.i[239447,239460] [2021-11-12 23:27:13,469 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 23:27:13,531 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:27:13,555 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 23:27:13,556 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@e327f75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:27:13, skipping insertion in model container [2021-11-12 23:27:13,556 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:27:13,557 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 23:27:13,559 INFO L158 Benchmark]: Toolchain (without parser) took 2166.84ms. Allocated memory was 121.6MB in the beginning and 157.3MB in the end (delta: 35.7MB). Free memory was 76.0MB in the beginning and 115.4MB in the end (delta: -39.3MB). Peak memory consumption was 30.7MB. Max. memory is 16.1GB. [2021-11-12 23:27:13,560 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 77.6MB. Free memory was 51.0MB in the beginning and 51.0MB in the end (delta: 29.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:27:13,561 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2148.46ms. Allocated memory was 121.6MB in the beginning and 157.3MB in the end (delta: 35.7MB). Free memory was 75.8MB in the beginning and 115.4MB in the end (delta: -39.6MB). Peak memory consumption was 30.7MB. Max. memory is 16.1GB. [2021-11-12 23:27:13,563 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 77.6MB. Free memory was 51.0MB in the beginning and 51.0MB in the end (delta: 29.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2148.46ms. Allocated memory was 121.6MB in the beginning and 157.3MB in the end (delta: 35.7MB). Free memory was 75.8MB in the beginning and 115.4MB in the end (delta: -39.6MB). Peak memory consumption was 30.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 4476]: 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_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/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_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-063f96c-1-144_1a-drivers--mmc--host--vub300.ko.unsigned-entry_point_ldv-val-v0.8.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/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_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/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 1f258bb699a014f11eb0babe874a45670072f33ce1154e31a2f0110b34e4ef74 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:27:15,689 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:27:15,691 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:27:15,744 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:27:15,744 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:27:15,748 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:27:15,751 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:27:15,759 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:27:15,763 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:27:15,771 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:27:15,773 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:27:15,775 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:27:15,775 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:27:15,778 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:27:15,780 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:27:15,786 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:27:15,787 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:27:15,790 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:27:15,793 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:27:15,798 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:27:15,800 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:27:15,803 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:27:15,806 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:27:15,809 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:27:15,817 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:27:15,817 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:27:15,817 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:27:15,818 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:27:15,819 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:27:15,820 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:27:15,820 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:27:15,821 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:27:15,822 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:27:15,823 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:27:15,824 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:27:15,825 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:27:15,826 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:27:15,826 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:27:15,826 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:27:15,828 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:27:15,835 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:27:15,835 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-12 23:27:15,911 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:27:15,912 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:27:15,913 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:27:15,913 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:27:15,913 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:27:15,914 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:27:15,914 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:27:15,914 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:27:15,915 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:27:15,915 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:27:15,918 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:27:15,918 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:27:15,918 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:27:15,918 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:27:15,918 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:27:15,919 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:27:15,919 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 23:27:15,919 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 23:27:15,919 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:27:15,919 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:27:15,919 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:27:15,920 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:27:15,920 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 23:27:15,920 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:27:15,920 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:27:15,921 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:27:15,921 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:27:15,921 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:27:15,921 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 23:27:15,921 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 23:27:15,921 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:27:15,922 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:27:15,922 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:27:15,922 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_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1f258bb699a014f11eb0babe874a45670072f33ce1154e31a2f0110b34e4ef74 [2021-11-12 23:27:16,298 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:27:16,323 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:27:16,327 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:27:16,330 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:27:16,331 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:27:16,332 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-063f96c-1-144_1a-drivers--mmc--host--vub300.ko.unsigned-entry_point_ldv-val-v0.8.cil.out.i [2021-11-12 23:27:16,415 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/data/727fa176a/eda700b45caf42668182836b3ae13927/FLAG1236d5d89 [2021-11-12 23:27:17,344 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:27:17,346 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-063f96c-1-144_1a-drivers--mmc--host--vub300.ko.unsigned-entry_point_ldv-val-v0.8.cil.out.i [2021-11-12 23:27:17,401 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/data/727fa176a/eda700b45caf42668182836b3ae13927/FLAG1236d5d89 [2021-11-12 23:27:17,770 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/data/727fa176a/eda700b45caf42668182836b3ae13927 [2021-11-12 23:27:17,772 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:27:17,775 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:27:17,778 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:27:17,778 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:27:17,782 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:27:17,782 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:27:17" (1/1) ... [2021-11-12 23:27:17,784 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40e4bae1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:27:17, skipping insertion in model container [2021-11-12 23:27:17,784 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:27:17" (1/1) ... [2021-11-12 23:27:17,791 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:27:17,966 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:27:20,065 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_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-063f96c-1-144_1a-drivers--mmc--host--vub300.ko.unsigned-entry_point_ldv-val-v0.8.cil.out.i[239447,239460] [2021-11-12 23:27:20,109 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:27:20,138 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 23:27:20,187 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:27:20,515 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_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-063f96c-1-144_1a-drivers--mmc--host--vub300.ko.unsigned-entry_point_ldv-val-v0.8.cil.out.i[239447,239460] [2021-11-12 23:27:20,530 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:27:20,553 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:27:20,953 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_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-063f96c-1-144_1a-drivers--mmc--host--vub300.ko.unsigned-entry_point_ldv-val-v0.8.cil.out.i[239447,239460] [2021-11-12 23:27:21,004 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:27:21,114 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:27:21,114 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:27:21 WrapperNode [2021-11-12 23:27:21,115 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:27:21,116 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:27:21,116 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:27:21,116 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:27:21,123 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:27:21" (1/1) ... [2021-11-12 23:27:21,236 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:27:21" (1/1) ... [2021-11-12 23:27:21,418 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:27:21,419 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:27:21,419 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:27:21,420 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:27:21,429 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:27:21" (1/1) ... [2021-11-12 23:27:21,429 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:27:21" (1/1) ... [2021-11-12 23:27:21,474 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:27:21" (1/1) ... [2021-11-12 23:27:21,475 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:27:21" (1/1) ... [2021-11-12 23:27:21,682 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:27:21" (1/1) ... [2021-11-12 23:27:21,715 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:27:21" (1/1) ... [2021-11-12 23:27:21,752 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:27:21" (1/1) ... [2021-11-12 23:27:21,784 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:27:21,786 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:27:21,786 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:27:21,786 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:27:21,788 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:27:21" (1/1) ... [2021-11-12 23:27:21,795 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:27:21,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:27:21,820 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:27:21,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:27:21,866 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-12 23:27:21,866 INFO L130 BoogieDeclarations]: Found specification of procedure msleep [2021-11-12 23:27:21,866 INFO L138 BoogieDeclarations]: Found implementation of procedure msleep [2021-11-12 23:27:21,866 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_fill_bulk_urb_12 [2021-11-12 23:27:21,867 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_fill_bulk_urb_12 [2021-11-12 23:27:21,867 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-12 23:27:21,867 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-12 23:27:21,867 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-12 23:27:21,867 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-12 23:27:21,867 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-12 23:27:21,868 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-12 23:27:21,868 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-12 23:27:21,868 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-12 23:27:21,868 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-12 23:27:21,868 INFO L130 BoogieDeclarations]: Found specification of procedure vub300_delete [2021-11-12 23:27:21,868 INFO L138 BoogieDeclarations]: Found implementation of procedure vub300_delete [2021-11-12 23:27:21,869 INFO L130 BoogieDeclarations]: Found specification of procedure usb_sg_wait [2021-11-12 23:27:21,869 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_sg_wait [2021-11-12 23:27:21,869 INFO L130 BoogieDeclarations]: Found specification of procedure vub300_usb_bulk_msg [2021-11-12 23:27:21,869 INFO L138 BoogieDeclarations]: Found implementation of procedure vub300_usb_bulk_msg [2021-11-12 23:27:21,869 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_submit_urb [2021-11-12 23:27:21,869 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_submit_urb [2021-11-12 23:27:21,869 INFO L130 BoogieDeclarations]: Found specification of procedure wait_for_completion_timeout [2021-11-12 23:27:21,870 INFO L138 BoogieDeclarations]: Found implementation of procedure wait_for_completion_timeout [2021-11-12 23:27:21,870 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-12 23:27:21,870 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-12 23:27:21,870 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_alloc_urb [2021-11-12 23:27:21,870 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_alloc_urb [2021-11-12 23:27:21,870 INFO L130 BoogieDeclarations]: Found specification of procedure destroy_workqueue [2021-11-12 23:27:21,871 INFO L138 BoogieDeclarations]: Found implementation of procedure destroy_workqueue [2021-11-12 23:27:21,871 INFO L130 BoogieDeclarations]: Found specification of procedure mmc_signal_sdio_irq [2021-11-12 23:27:21,871 INFO L138 BoogieDeclarations]: Found implementation of procedure mmc_signal_sdio_irq [2021-11-12 23:27:21,871 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_get_intfdata_50 [2021-11-12 23:27:21,871 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_get_intfdata_50 [2021-11-12 23:27:21,871 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-11-12 23:27:21,872 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-11-12 23:27:21,872 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-12 23:27:21,872 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-12 23:27:21,873 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-12 23:27:21,873 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-12 23:27:21,873 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-12 23:27:21,873 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-12 23:27:21,873 INFO L130 BoogieDeclarations]: Found specification of procedure mmc_detect_change [2021-11-12 23:27:21,873 INFO L138 BoogieDeclarations]: Found implementation of procedure mmc_detect_change [2021-11-12 23:27:21,874 INFO L130 BoogieDeclarations]: Found specification of procedure del_timer [2021-11-12 23:27:21,874 INFO L138 BoogieDeclarations]: Found implementation of procedure del_timer [2021-11-12 23:27:21,874 INFO L130 BoogieDeclarations]: Found specification of procedure usb_sg_cancel [2021-11-12 23:27:21,874 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_sg_cancel [2021-11-12 23:27:21,874 INFO L130 BoogieDeclarations]: Found specification of procedure usb_sg_init [2021-11-12 23:27:21,874 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_sg_init [2021-11-12 23:27:21,874 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_29 [2021-11-12 23:27:21,875 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_29 [2021-11-12 23:27:21,876 INFO L130 BoogieDeclarations]: Found specification of procedure __command_read_data [2021-11-12 23:27:21,877 INFO L138 BoogieDeclarations]: Found implementation of procedure __command_read_data [2021-11-12 23:27:21,877 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:27:21,877 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_27 [2021-11-12 23:27:21,877 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_27 [2021-11-12 23:27:21,877 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2021-11-12 23:27:21,877 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2021-11-12 23:27:21,878 INFO L130 BoogieDeclarations]: Found specification of procedure usb_unlink_urb [2021-11-12 23:27:21,878 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_unlink_urb [2021-11-12 23:27:21,878 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-12 23:27:21,879 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_13 [2021-11-12 23:27:21,879 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_13 [2021-11-12 23:27:21,879 INFO L130 BoogieDeclarations]: Found specification of procedure add_timer [2021-11-12 23:27:21,879 INFO L138 BoogieDeclarations]: Found implementation of procedure add_timer [2021-11-12 23:27:21,879 INFO L130 BoogieDeclarations]: Found specification of procedure irqpoll_out_completed [2021-11-12 23:27:21,879 INFO L138 BoogieDeclarations]: Found implementation of procedure irqpoll_out_completed [2021-11-12 23:27:21,880 INFO L130 BoogieDeclarations]: Found specification of procedure vub300_disconnect [2021-11-12 23:27:21,880 INFO L138 BoogieDeclarations]: Found implementation of procedure vub300_disconnect [2021-11-12 23:27:21,881 INFO L130 BoogieDeclarations]: Found specification of procedure call_and_disable_work_3 [2021-11-12 23:27:21,881 INFO L138 BoogieDeclarations]: Found implementation of procedure call_and_disable_work_3 [2021-11-12 23:27:21,881 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_15 [2021-11-12 23:27:21,881 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_15 [2021-11-12 23:27:21,881 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-12 23:27:21,881 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-12 23:27:21,882 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-12 23:27:21,882 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-12 23:27:21,882 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-12 23:27:21,882 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-12 23:27:21,882 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2021-11-12 23:27:21,882 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 23:27:21,882 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-12 23:27:21,883 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-12 23:27:21,883 INFO L130 BoogieDeclarations]: Found specification of procedure __mutex_init [2021-11-12 23:27:21,883 INFO L138 BoogieDeclarations]: Found implementation of procedure __mutex_init [2021-11-12 23:27:21,883 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-11-12 23:27:21,884 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-11-12 23:27:21,884 INFO L130 BoogieDeclarations]: Found specification of procedure vub300_enable_sdio_irq [2021-11-12 23:27:21,884 INFO L138 BoogieDeclarations]: Found implementation of procedure vub300_enable_sdio_irq [2021-11-12 23:27:21,885 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2021-11-12 23:27:21,885 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2021-11-12 23:27:21,886 INFO L130 BoogieDeclarations]: Found specification of procedure lockdep_init_map [2021-11-12 23:27:21,886 INFO L138 BoogieDeclarations]: Found implementation of procedure lockdep_init_map [2021-11-12 23:27:21,886 INFO L130 BoogieDeclarations]: Found specification of procedure add_offloaded_reg [2021-11-12 23:27:21,887 INFO L138 BoogieDeclarations]: Found implementation of procedure add_offloaded_reg [2021-11-12 23:27:21,887 INFO L130 BoogieDeclarations]: Found specification of procedure release_firmware [2021-11-12 23:27:21,887 INFO L138 BoogieDeclarations]: Found implementation of procedure release_firmware [2021-11-12 23:27:21,887 INFO L130 BoogieDeclarations]: Found specification of procedure command_out_completed [2021-11-12 23:27:21,888 INFO L138 BoogieDeclarations]: Found implementation of procedure command_out_completed [2021-11-12 23:27:21,888 INFO L130 BoogieDeclarations]: Found specification of procedure roundup_to_multiple_of_64 [2021-11-12 23:27:21,888 INFO L138 BoogieDeclarations]: Found implementation of procedure roundup_to_multiple_of_64 [2021-11-12 23:27:21,888 INFO L130 BoogieDeclarations]: Found specification of procedure flush_workqueue [2021-11-12 23:27:21,888 INFO L138 BoogieDeclarations]: Found implementation of procedure flush_workqueue [2021-11-12 23:27:21,888 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_urb [2021-11-12 23:27:21,889 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_urb [2021-11-12 23:27:21,889 INFO L130 BoogieDeclarations]: Found specification of procedure vub300_cmndwork_thread [2021-11-12 23:27:21,889 INFO L138 BoogieDeclarations]: Found implementation of procedure vub300_cmndwork_thread [2021-11-12 23:27:21,889 INFO L130 BoogieDeclarations]: Found specification of procedure activate_pending_timer_4 [2021-11-12 23:27:21,890 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_pending_timer_4 [2021-11-12 23:27:21,890 INFO L130 BoogieDeclarations]: Found specification of procedure send_command [2021-11-12 23:27:21,890 INFO L138 BoogieDeclarations]: Found implementation of procedure send_command [2021-11-12 23:27:21,891 INFO L130 BoogieDeclarations]: Found specification of procedure kref_get [2021-11-12 23:27:21,891 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_get [2021-11-12 23:27:21,894 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_xfer_bulk [2021-11-12 23:27:21,894 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_xfer_bulk [2021-11-12 23:27:21,894 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-12 23:27:21,894 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-12 23:27:21,895 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2021-11-12 23:27:21,897 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2021-11-12 23:27:21,897 INFO L130 BoogieDeclarations]: Found specification of procedure send_irqpoll [2021-11-12 23:27:21,897 INFO L138 BoogieDeclarations]: Found implementation of procedure send_irqpoll [2021-11-12 23:27:21,897 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2021-11-12 23:27:21,904 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2021-11-12 23:27:21,904 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-12 23:27:21,904 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-12 23:27:21,904 INFO L130 BoogieDeclarations]: Found specification of procedure init_completion [2021-11-12 23:27:21,905 INFO L138 BoogieDeclarations]: Found implementation of procedure init_completion [2021-11-12 23:27:21,905 INFO L130 BoogieDeclarations]: Found specification of procedure vub300_response_error [2021-11-12 23:27:21,905 INFO L138 BoogieDeclarations]: Found implementation of procedure vub300_response_error [2021-11-12 23:27:21,905 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-12 23:27:21,905 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_is_bulk_out [2021-11-12 23:27:21,905 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_is_bulk_out [2021-11-12 23:27:21,905 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2021-11-12 23:27:21,905 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-12 23:27:21,906 INFO L130 BoogieDeclarations]: Found specification of procedure mmc_free_host [2021-11-12 23:27:21,906 INFO L138 BoogieDeclarations]: Found implementation of procedure mmc_free_host [2021-11-12 23:27:21,906 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2021-11-12 23:27:21,906 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-12 23:27:21,906 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-12 23:27:21,906 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_32 [2021-11-12 23:27:21,906 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_32 [2021-11-12 23:27:21,907 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2021-11-12 23:27:21,907 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2021-11-12 23:27:21,907 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-12 23:27:21,907 INFO L130 BoogieDeclarations]: Found specification of procedure vub300_queue_poll_work [2021-11-12 23:27:21,907 INFO L138 BoogieDeclarations]: Found implementation of procedure vub300_queue_poll_work [2021-11-12 23:27:21,907 INFO L130 BoogieDeclarations]: Found specification of procedure disable_suitable_timer_4 [2021-11-12 23:27:21,907 INFO L138 BoogieDeclarations]: Found implementation of procedure disable_suitable_timer_4 [2021-11-12 23:27:21,907 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2021-11-12 23:27:21,908 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2021-11-12 23:27:21,908 INFO L130 BoogieDeclarations]: Found specification of procedure complete [2021-11-12 23:27:21,908 INFO L138 BoogieDeclarations]: Found implementation of procedure complete [2021-11-12 23:27:21,908 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_is_bulk_in [2021-11-12 23:27:21,908 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_is_bulk_in [2021-11-12 23:27:21,908 INFO L130 BoogieDeclarations]: Found specification of procedure sg_copy_to_buffer [2021-11-12 23:27:21,908 INFO L138 BoogieDeclarations]: Found implementation of procedure sg_copy_to_buffer [2021-11-12 23:27:21,909 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_kref_put_9 [2021-11-12 23:27:21,909 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_kref_put_9 [2021-11-12 23:27:21,909 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-11-12 23:27:21,909 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-11-12 23:27:21,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-12 23:27:21,909 INFO L130 BoogieDeclarations]: Found specification of procedure __download_offload_pseudocode [2021-11-12 23:27:21,909 INFO L138 BoogieDeclarations]: Found implementation of procedure __download_offload_pseudocode [2021-11-12 23:27:21,910 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2021-11-12 23:27:21,910 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~C_INT~TO~VOID [2021-11-12 23:27:21,910 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~C_INT~TO~VOID [2021-11-12 23:27:21,910 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2021-11-12 23:27:21,910 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-12 23:27:21,910 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-12 23:27:21,910 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-12 23:27:21,910 INFO L130 BoogieDeclarations]: Found specification of procedure reg_timer_4 [2021-11-12 23:27:21,911 INFO L138 BoogieDeclarations]: Found implementation of procedure reg_timer_4 [2021-11-12 23:27:21,911 INFO L130 BoogieDeclarations]: Found specification of procedure vub300_pollwork_thread [2021-11-12 23:27:21,911 INFO L138 BoogieDeclarations]: Found implementation of procedure vub300_pollwork_thread [2021-11-12 23:27:21,911 INFO L130 BoogieDeclarations]: Found specification of procedure interface_to_InterfaceNumber [2021-11-12 23:27:21,911 INFO L138 BoogieDeclarations]: Found implementation of procedure interface_to_InterfaceNumber [2021-11-12 23:27:21,911 INFO L130 BoogieDeclarations]: Found specification of procedure usb_control_msg [2021-11-12 23:27:21,911 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_control_msg [2021-11-12 23:27:21,912 INFO L130 BoogieDeclarations]: Found specification of procedure mod_timer [2021-11-12 23:27:21,912 INFO L138 BoogieDeclarations]: Found implementation of procedure mod_timer [2021-11-12 23:27:21,912 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_urb [2021-11-12 23:27:21,912 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_urb [2021-11-12 23:27:21,912 INFO L130 BoogieDeclarations]: Found specification of procedure __do_poll [2021-11-12 23:27:21,912 INFO L138 BoogieDeclarations]: Found implementation of procedure __do_poll [2021-11-12 23:27:21,912 INFO L130 BoogieDeclarations]: Found specification of procedure call_and_disable_all_3 [2021-11-12 23:27:21,913 INFO L138 BoogieDeclarations]: Found implementation of procedure call_and_disable_all_3 [2021-11-12 23:27:21,913 INFO L130 BoogieDeclarations]: Found specification of procedure new_system_port_status [2021-11-12 23:27:21,913 INFO L138 BoogieDeclarations]: Found implementation of procedure new_system_port_status [2021-11-12 23:27:21,913 INFO L130 BoogieDeclarations]: Found specification of procedure mmc_request_done [2021-11-12 23:27:21,913 INFO L138 BoogieDeclarations]: Found implementation of procedure mmc_request_done [2021-11-12 23:27:21,913 INFO L130 BoogieDeclarations]: Found specification of procedure __init_work [2021-11-12 23:27:21,913 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_work [2021-11-12 23:27:21,913 INFO L130 BoogieDeclarations]: Found specification of procedure msecs_to_jiffies [2021-11-12 23:27:21,914 INFO L138 BoogieDeclarations]: Found implementation of procedure msecs_to_jiffies [2021-11-12 23:27:21,914 INFO L130 BoogieDeclarations]: Found specification of procedure __command_write_data [2021-11-12 23:27:21,914 INFO L138 BoogieDeclarations]: Found implementation of procedure __command_write_data [2021-11-12 23:27:21,914 INFO L130 BoogieDeclarations]: Found specification of procedure request_firmware [2021-11-12 23:27:21,914 INFO L138 BoogieDeclarations]: Found implementation of procedure request_firmware [2021-11-12 23:27:21,914 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~C_ULONG~TO~VOID [2021-11-12 23:27:21,914 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~C_ULONG~TO~VOID [2021-11-12 23:27:21,915 INFO L130 BoogieDeclarations]: Found specification of procedure delayed_work_timer_fn [2021-11-12 23:27:21,915 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_set_intfdata_47 [2021-11-12 23:27:21,915 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_set_intfdata_47 [2021-11-12 23:27:21,915 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_urb [2021-11-12 23:27:21,915 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_urb [2021-11-12 23:27:21,915 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-12 23:27:21,915 INFO L130 BoogieDeclarations]: Found specification of procedure usb_string [2021-11-12 23:27:21,915 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_string [2021-11-12 23:27:21,916 INFO L130 BoogieDeclarations]: Found specification of procedure mmc_priv [2021-11-12 23:27:21,916 INFO L138 BoogieDeclarations]: Found implementation of procedure mmc_priv [2021-11-12 23:27:21,916 INFO L130 BoogieDeclarations]: Found specification of procedure queue_work [2021-11-12 23:27:21,916 INFO L138 BoogieDeclarations]: Found implementation of procedure queue_work [2021-11-12 23:27:21,916 INFO L130 BoogieDeclarations]: Found specification of procedure vub300_deadwork_thread [2021-11-12 23:27:21,916 INFO L138 BoogieDeclarations]: Found implementation of procedure vub300_deadwork_thread [2021-11-12 23:27:21,916 INFO L130 BoogieDeclarations]: Found specification of procedure check_vub300_port_status [2021-11-12 23:27:21,917 INFO L138 BoogieDeclarations]: Found implementation of procedure check_vub300_port_status [2021-11-12 23:27:21,917 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2021-11-12 23:27:21,917 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:27:21,917 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:27:33,096 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-12 23:28:18,286 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:28:18,286 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-12 23:28:18,291 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:28:18 BoogieIcfgContainer [2021-11-12 23:28:18,291 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:28:18,293 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:28:18,293 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:28:18,296 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:28:18,296 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:27:17" (1/3) ... [2021-11-12 23:28:18,297 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f00dd27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:28:18, skipping insertion in model container [2021-11-12 23:28:18,297 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:27:21" (2/3) ... [2021-11-12 23:28:18,298 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f00dd27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:28:18, skipping insertion in model container [2021-11-12 23:28:18,298 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:28:18" (3/3) ... [2021-11-12 23:28:18,299 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-stable-063f96c-1-144_1a-drivers--mmc--host--vub300.ko.unsigned-entry_point_ldv-val-v0.8.cil.out.i [2021-11-12 23:28:18,304 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:28:18,305 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 23:28:18,360 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:28:18,366 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 23:28:18,367 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 23:28:18,417 INFO L276 IsEmpty]: Start isEmpty. Operand has 1581 states, 1104 states have (on average 1.3967391304347827) internal successors, (1542), 1170 states have internal predecessors, (1542), 382 states have call successors, (382), 94 states have call predecessors, (382), 93 states have return successors, (373), 347 states have call predecessors, (373), 373 states have call successors, (373) [2021-11-12 23:28:18,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-12 23:28:18,435 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:28:18,437 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:28:18,437 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:28:18,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:28:18,443 INFO L85 PathProgramCache]: Analyzing trace with hash -956630900, now seen corresponding path program 1 times [2021-11-12 23:28:18,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:28:18,463 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1737553453] [2021-11-12 23:28:18,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:28:18,464 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:28:18,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:28:18,467 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:28:18,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 23:28:19,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:28:19,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 1061 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-12 23:28:19,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:28:20,778 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-12 23:28:20,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:28:21,390 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-11-12 23:28:21,391 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:28:21,392 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1737553453] [2021-11-12 23:28:21,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1737553453] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:28:21,392 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:28:21,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2021-11-12 23:28:21,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362068872] [2021-11-12 23:28:21,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:28:21,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-12 23:28:21,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:28:21,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-12 23:28:21,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 23:28:21,433 INFO L87 Difference]: Start difference. First operand has 1581 states, 1104 states have (on average 1.3967391304347827) internal successors, (1542), 1170 states have internal predecessors, (1542), 382 states have call successors, (382), 94 states have call predecessors, (382), 93 states have return successors, (373), 347 states have call predecessors, (373), 373 states have call successors, (373) Second operand has 2 states, 2 states have (on average 28.5) internal successors, (57), 2 states have internal predecessors, (57), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-12 23:28:21,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:28:21,592 INFO L93 Difference]: Finished difference Result 3157 states and 4649 transitions. [2021-11-12 23:28:21,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-12 23:28:21,594 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 28.5) internal successors, (57), 2 states have internal predecessors, (57), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 113 [2021-11-12 23:28:21,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:28:21,622 INFO L225 Difference]: With dead ends: 3157 [2021-11-12 23:28:21,622 INFO L226 Difference]: Without dead ends: 1565 [2021-11-12 23:28:21,639 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 23:28:21,643 INFO L933 BasicCegarLoop]: 2290 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2290 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.84ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-12 23:28:21,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 2290 Invalid, 0 Unknown, 0 Unchecked, 13.84ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-12 23:28:21,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1565 states. [2021-11-12 23:28:21,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1565 to 1565. [2021-11-12 23:28:21,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1565 states, 1099 states have (on average 1.3876251137397635) internal successors, (1525), 1154 states have internal predecessors, (1525), 373 states have call successors, (373), 93 states have call predecessors, (373), 92 states have return successors, (369), 343 states have call predecessors, (369), 369 states have call successors, (369) [2021-11-12 23:28:21,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1565 states to 1565 states and 2267 transitions. [2021-11-12 23:28:21,828 INFO L78 Accepts]: Start accepts. Automaton has 1565 states and 2267 transitions. Word has length 113 [2021-11-12 23:28:21,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:28:21,829 INFO L470 AbstractCegarLoop]: Abstraction has 1565 states and 2267 transitions. [2021-11-12 23:28:21,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 28.5) internal successors, (57), 2 states have internal predecessors, (57), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-12 23:28:21,830 INFO L276 IsEmpty]: Start isEmpty. Operand 1565 states and 2267 transitions. [2021-11-12 23:28:21,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-12 23:28:21,841 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:28:21,842 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:28:21,872 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 23:28:22,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:28:22,064 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:28:22,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:28:22,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1997437564, now seen corresponding path program 1 times [2021-11-12 23:28:22,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:28:22,068 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1673255247] [2021-11-12 23:28:22,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:28:22,068 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:28:22,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:28:22,070 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:28:22,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 23:28:23,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:28:23,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 1061 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:28:23,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:28:24,288 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-12 23:28:24,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:28:25,988 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-12 23:28:25,988 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:28:25,988 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1673255247] [2021-11-12 23:28:25,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1673255247] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:28:25,989 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:28:25,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 9 [2021-11-12 23:28:25,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216560373] [2021-11-12 23:28:25,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:28:25,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:28:25,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:28:25,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:28:25,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:28:25,993 INFO L87 Difference]: Start difference. First operand 1565 states and 2267 transitions. Second operand has 6 states, 5 states have (on average 10.6) internal successors, (53), 6 states have internal predecessors, (53), 3 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-12 23:28:27,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:28:27,024 INFO L93 Difference]: Finished difference Result 3124 states and 4529 transitions. [2021-11-12 23:28:27,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:28:27,025 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.6) internal successors, (53), 6 states have internal predecessors, (53), 3 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 113 [2021-11-12 23:28:27,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:28:27,043 INFO L225 Difference]: With dead ends: 3124 [2021-11-12 23:28:27,043 INFO L226 Difference]: Without dead ends: 1568 [2021-11-12 23:28:27,052 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:28:27,053 INFO L933 BasicCegarLoop]: 2258 mSDtfsCounter, 6 mSDsluCounter, 9018 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 594.39ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 11276 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 52.15ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 637.89ms IncrementalHoareTripleChecker+Time [2021-11-12 23:28:27,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 11276 Invalid, 55 Unknown, 0 Unchecked, 52.15ms Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 637.89ms Time] [2021-11-12 23:28:27,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1568 states. [2021-11-12 23:28:27,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1568 to 1568. [2021-11-12 23:28:27,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1568 states, 1101 states have (on average 1.387829246139873) internal successors, (1528), 1157 states have internal predecessors, (1528), 373 states have call successors, (373), 93 states have call predecessors, (373), 93 states have return successors, (373), 343 states have call predecessors, (373), 369 states have call successors, (373) [2021-11-12 23:28:27,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1568 states to 1568 states and 2274 transitions. [2021-11-12 23:28:27,165 INFO L78 Accepts]: Start accepts. Automaton has 1568 states and 2274 transitions. Word has length 113 [2021-11-12 23:28:27,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:28:27,167 INFO L470 AbstractCegarLoop]: Abstraction has 1568 states and 2274 transitions. [2021-11-12 23:28:27,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.6) internal successors, (53), 6 states have internal predecessors, (53), 3 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-12 23:28:27,168 INFO L276 IsEmpty]: Start isEmpty. Operand 1568 states and 2274 transitions. [2021-11-12 23:28:27,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-12 23:28:27,173 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:28:27,174 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-11-12 23:28:27,204 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-12 23:28:27,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:28:27,398 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:28:27,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:28:27,398 INFO L85 PathProgramCache]: Analyzing trace with hash -54256158, now seen corresponding path program 1 times [2021-11-12 23:28:27,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:28:27,401 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1302958180] [2021-11-12 23:28:27,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:28:27,402 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:28:27,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:28:27,404 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:28:27,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 23:28:28,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:28:28,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 1071 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:28:28,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:28:29,622 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-11-12 23:28:29,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:28:31,387 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-11-12 23:28:31,387 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:28:31,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1302958180] [2021-11-12 23:28:31,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1302958180] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:28:31,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1872396080] [2021-11-12 23:28:31,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:28:31,388 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:28:31,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:28:31,392 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:28:31,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-11-12 23:28:32,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:28:32,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 1071 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:28:32,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:28:34,512 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-11-12 23:28:34,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:28:35,319 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-11-12 23:28:35,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1872396080] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:28:35,320 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:28:35,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [7, 7] total 12 [2021-11-12 23:28:35,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331860815] [2021-11-12 23:28:35,321 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:28:35,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:28:35,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:28:35,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:28:35,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:28:35,323 INFO L87 Difference]: Start difference. First operand 1568 states and 2274 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-12 23:28:35,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:28:35,593 INFO L93 Difference]: Finished difference Result 4651 states and 6894 transitions. [2021-11-12 23:28:35,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:28:35,594 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 115 [2021-11-12 23:28:35,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:28:35,625 INFO L225 Difference]: With dead ends: 4651 [2021-11-12 23:28:35,626 INFO L226 Difference]: Without dead ends: 3106 [2021-11-12 23:28:35,638 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 456 GetRequests, 446 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:28:35,644 INFO L933 BasicCegarLoop]: 2881 mSDtfsCounter, 2198 mSDsluCounter, 2258 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 96.61ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2198 SdHoareTripleChecker+Valid, 5139 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 19.15ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 101.28ms IncrementalHoareTripleChecker+Time [2021-11-12 23:28:35,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2198 Valid, 5139 Invalid, 13 Unknown, 0 Unchecked, 19.15ms Time], IncrementalHoareTripleChecker [3 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 101.28ms Time] [2021-11-12 23:28:35,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3106 states. [2021-11-12 23:28:35,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3106 to 3101. [2021-11-12 23:28:35,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3101 states, 2181 states have (on average 1.3888124713434205) internal successors, (3029), 2289 states have internal predecessors, (3029), 735 states have call successors, (735), 184 states have call predecessors, (735), 184 states have return successors, (770), 679 states have call predecessors, (770), 731 states have call successors, (770) [2021-11-12 23:28:35,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3101 states to 3101 states and 4534 transitions. [2021-11-12 23:28:35,840 INFO L78 Accepts]: Start accepts. Automaton has 3101 states and 4534 transitions. Word has length 115 [2021-11-12 23:28:35,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:28:35,843 INFO L470 AbstractCegarLoop]: Abstraction has 3101 states and 4534 transitions. [2021-11-12 23:28:35,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-12 23:28:35,843 INFO L276 IsEmpty]: Start isEmpty. Operand 3101 states and 4534 transitions. [2021-11-12 23:28:35,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-12 23:28:35,846 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:28:35,847 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-11-12 23:28:35,876 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 23:28:36,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-11-12 23:28:36,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:28:36,261 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:28:36,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:28:36,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1682486720, now seen corresponding path program 1 times [2021-11-12 23:28:36,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:28:36,263 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1174798595] [2021-11-12 23:28:36,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:28:36,263 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:28:36,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:28:36,264 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:28:36,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 23:28:37,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:28:37,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 1072 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:28:37,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:28:38,660 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-11-12 23:28:38,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:28:40,592 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-11-12 23:28:40,592 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:28:40,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1174798595] [2021-11-12 23:28:40,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1174798595] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:28:40,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1865007641] [2021-11-12 23:28:40,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:28:40,593 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:28:40,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:28:40,595 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:28:40,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-12 23:28:41,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:28:41,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 1072 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:28:41,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:28:43,674 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-11-12 23:28:43,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:28:44,533 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-11-12 23:28:44,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1865007641] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:28:44,533 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:28:44,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [7, 7] total 12 [2021-11-12 23:28:44,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224089601] [2021-11-12 23:28:44,534 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:28:44,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:28:44,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:28:44,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:28:44,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:28:44,536 INFO L87 Difference]: Start difference. First operand 3101 states and 4534 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 3 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-12 23:28:44,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:28:44,942 INFO L93 Difference]: Finished difference Result 8894 states and 13248 transitions. [2021-11-12 23:28:44,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:28:44,943 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 3 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 116 [2021-11-12 23:28:44,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:28:45,010 INFO L225 Difference]: With dead ends: 8894 [2021-11-12 23:28:45,011 INFO L226 Difference]: Without dead ends: 5816 [2021-11-12 23:28:45,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 460 GetRequests, 450 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:28:45,038 INFO L933 BasicCegarLoop]: 2593 mSDtfsCounter, 1944 mSDsluCounter, 2228 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 77.61ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1944 SdHoareTripleChecker+Valid, 4821 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.56ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 81.53ms IncrementalHoareTripleChecker+Time [2021-11-12 23:28:45,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1944 Valid, 4821 Invalid, 9 Unknown, 0 Unchecked, 16.56ms Time], IncrementalHoareTripleChecker [2 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 81.53ms Time] [2021-11-12 23:28:45,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5816 states. [2021-11-12 23:28:45,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5816 to 5806. [2021-11-12 23:28:45,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5806 states, 4084 states have (on average 1.3949559255631734) internal successors, (5697), 4294 states have internal predecessors, (5697), 1371 states have call successors, (1371), 350 states have call predecessors, (1371), 350 states have return successors, (1439), 1263 states have call predecessors, (1439), 1367 states have call successors, (1439) [2021-11-12 23:28:45,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5806 states to 5806 states and 8507 transitions. [2021-11-12 23:28:45,420 INFO L78 Accepts]: Start accepts. Automaton has 5806 states and 8507 transitions. Word has length 116 [2021-11-12 23:28:45,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:28:45,420 INFO L470 AbstractCegarLoop]: Abstraction has 5806 states and 8507 transitions. [2021-11-12 23:28:45,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 3 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-12 23:28:45,421 INFO L276 IsEmpty]: Start isEmpty. Operand 5806 states and 8507 transitions. [2021-11-12 23:28:45,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-12 23:28:45,425 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:28:45,425 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-11-12 23:28:45,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-12 23:28:45,660 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (7)] Ended with exit code 0 [2021-11-12 23:28:45,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:28:45,848 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:28:45,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:28:45,849 INFO L85 PathProgramCache]: Analyzing trace with hash -618021723, now seen corresponding path program 1 times [2021-11-12 23:28:45,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:28:45,850 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1684437358] [2021-11-12 23:28:45,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:28:45,851 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:28:45,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:28:45,852 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:28:45,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 23:28:47,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:28:47,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 1073 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:28:47,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:28:48,217 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-11-12 23:28:48,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:28:49,905 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-11-12 23:28:49,905 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:28:49,905 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1684437358] [2021-11-12 23:28:49,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1684437358] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:28:49,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2114909463] [2021-11-12 23:28:49,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:28:49,906 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:28:49,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:28:49,909 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:28:49,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-12 23:28:50,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:28:50,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 1073 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:28:50,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:28:52,541 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-11-12 23:28:52,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:28:53,217 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-11-12 23:28:53,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2114909463] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:28:53,217 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:28:53,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [7, 7] total 12 [2021-11-12 23:28:53,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730739045] [2021-11-12 23:28:53,218 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:28:53,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:28:53,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:28:53,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:28:53,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:28:53,219 INFO L87 Difference]: Start difference. First operand 5806 states and 8507 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-12 23:28:53,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:28:53,412 INFO L93 Difference]: Finished difference Result 5808 states and 8508 transitions. [2021-11-12 23:28:53,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:28:53,412 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 117 [2021-11-12 23:28:53,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:28:53,459 INFO L225 Difference]: With dead ends: 5808 [2021-11-12 23:28:53,459 INFO L226 Difference]: Without dead ends: 5805 [2021-11-12 23:28:53,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 464 GetRequests, 454 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:28:53,464 INFO L933 BasicCegarLoop]: 2264 mSDtfsCounter, 2199 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.60ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2199 SdHoareTripleChecker+Valid, 2264 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.08ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.62ms IncrementalHoareTripleChecker+Time [2021-11-12 23:28:53,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2199 Valid, 2264 Invalid, 1 Unknown, 0 Unchecked, 7.08ms Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 7.62ms Time] [2021-11-12 23:28:53,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5805 states. [2021-11-12 23:28:53,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5805 to 5805. [2021-11-12 23:28:53,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5805 states, 4084 states have (on average 1.3947110675808032) internal successors, (5696), 4293 states have internal predecessors, (5696), 1370 states have call successors, (1370), 350 states have call predecessors, (1370), 350 states have return successors, (1439), 1263 states have call predecessors, (1439), 1367 states have call successors, (1439) [2021-11-12 23:28:53,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5805 states to 5805 states and 8505 transitions. [2021-11-12 23:28:53,825 INFO L78 Accepts]: Start accepts. Automaton has 5805 states and 8505 transitions. Word has length 117 [2021-11-12 23:28:53,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:28:53,826 INFO L470 AbstractCegarLoop]: Abstraction has 5805 states and 8505 transitions. [2021-11-12 23:28:53,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-12 23:28:53,827 INFO L276 IsEmpty]: Start isEmpty. Operand 5805 states and 8505 transitions. [2021-11-12 23:28:53,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-12 23:28:53,830 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:28:53,831 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-11-12 23:28:53,842 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-11-12 23:28:54,073 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-12 23:28:54,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:28:54,242 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:28:54,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:28:54,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1979340317, now seen corresponding path program 1 times [2021-11-12 23:28:54,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:28:54,244 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [53599401] [2021-11-12 23:28:54,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:28:54,244 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:28:54,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:28:54,247 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:28:54,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 23:28:55,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:28:55,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 1074 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:28:55,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:28:56,308 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-11-12 23:28:56,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:28:57,934 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-11-12 23:28:57,934 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:28:57,934 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [53599401] [2021-11-12 23:28:57,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [53599401] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:28:57,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [137837130] [2021-11-12 23:28:57,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:28:57,935 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:28:57,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:28:57,936 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:28:57,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-12 23:28:58,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:28:58,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 1074 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:28:58,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:29:00,594 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-11-12 23:29:00,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:29:01,275 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-11-12 23:29:01,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [137837130] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:29:01,276 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:29:01,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [7, 7] total 12 [2021-11-12 23:29:01,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688560926] [2021-11-12 23:29:01,276 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:29:01,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:29:01,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:29:01,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:29:01,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:29:01,278 INFO L87 Difference]: Start difference. First operand 5805 states and 8505 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-12 23:29:01,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:29:01,466 INFO L93 Difference]: Finished difference Result 5807 states and 8506 transitions. [2021-11-12 23:29:01,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:29:01,467 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 118 [2021-11-12 23:29:01,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:29:01,514 INFO L225 Difference]: With dead ends: 5807 [2021-11-12 23:29:01,514 INFO L226 Difference]: Without dead ends: 5775 [2021-11-12 23:29:01,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 458 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:29:01,521 INFO L933 BasicCegarLoop]: 2263 mSDtfsCounter, 2196 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2196 SdHoareTripleChecker+Valid, 2263 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.30ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-12 23:29:01,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2196 Valid, 2263 Invalid, 0 Unknown, 0 Unchecked, 7.30ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-12 23:29:01,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5775 states. [2021-11-12 23:29:01,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5775 to 5775. [2021-11-12 23:29:01,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5775 states, 4068 states have (on average 1.3952802359882006) internal successors, (5676), 4276 states have internal predecessors, (5676), 1357 states have call successors, (1357), 349 states have call predecessors, (1357), 349 states have return successors, (1427), 1251 states have call predecessors, (1427), 1355 states have call successors, (1427) [2021-11-12 23:29:01,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5775 states to 5775 states and 8460 transitions. [2021-11-12 23:29:01,892 INFO L78 Accepts]: Start accepts. Automaton has 5775 states and 8460 transitions. Word has length 118 [2021-11-12 23:29:01,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:29:01,892 INFO L470 AbstractCegarLoop]: Abstraction has 5775 states and 8460 transitions. [2021-11-12 23:29:01,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-12 23:29:01,893 INFO L276 IsEmpty]: Start isEmpty. Operand 5775 states and 8460 transitions. [2021-11-12 23:29:01,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-11-12 23:29:01,904 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:29:01,904 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2021-11-12 23:29:01,920 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-12 23:29:02,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 23:29:02,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:29:02,321 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:29:02,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:29:02,321 INFO L85 PathProgramCache]: Analyzing trace with hash -965151074, now seen corresponding path program 1 times [2021-11-12 23:29:02,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:29:02,323 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1935066074] [2021-11-12 23:29:02,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:29:02,323 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:29:02,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:29:02,324 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:29:02,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 23:29:03,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:29:03,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 1293 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:29:03,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:29:04,822 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-12 23:29:04,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:29:06,801 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-11-12 23:29:06,801 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:29:06,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1935066074] [2021-11-12 23:29:06,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1935066074] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:29:06,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1976076970] [2021-11-12 23:29:06,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:29:06,802 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:29:06,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:29:06,808 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:29:06,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-12 23:29:07,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:29:07,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 1293 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:29:07,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:29:08,924 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-11-12 23:29:08,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:29:09,706 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-11-12 23:29:09,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1976076970] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:29:09,706 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:29:09,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7, 7] total 12 [2021-11-12 23:29:09,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517640942] [2021-11-12 23:29:09,707 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:29:09,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:29:09,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:29:09,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:29:09,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:29:09,709 INFO L87 Difference]: Start difference. First operand 5775 states and 8460 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, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-12 23:29:10,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:29:10,818 INFO L93 Difference]: Finished difference Result 16672 states and 24422 transitions. [2021-11-12 23:29:10,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:29:10,819 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, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 168 [2021-11-12 23:29:10,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:29:10,985 INFO L225 Difference]: With dead ends: 16672 [2021-11-12 23:29:10,985 INFO L226 Difference]: Without dead ends: 10920 [2021-11-12 23:29:11,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 668 GetRequests, 658 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:29:11,016 INFO L933 BasicCegarLoop]: 2684 mSDtfsCounter, 1924 mSDsluCounter, 2176 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 450.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1924 SdHoareTripleChecker+Valid, 4860 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.74ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 486.84ms IncrementalHoareTripleChecker+Time [2021-11-12 23:29:11,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1924 Valid, 4860 Invalid, 24 Unknown, 0 Unchecked, 13.74ms Time], IncrementalHoareTripleChecker [3 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 486.84ms Time] [2021-11-12 23:29:11,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10920 states. [2021-11-12 23:29:11,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10920 to 10899. [2021-11-12 23:29:11,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10899 states, 7672 states have (on average 1.3983315954118873) internal successors, (10728), 8084 states have internal predecessors, (10728), 2549 states have call successors, (2549), 677 states have call predecessors, (2549), 677 states have return successors, (2685), 2339 states have call predecessors, (2685), 2547 states have call successors, (2685) [2021-11-12 23:29:11,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10899 states to 10899 states and 15962 transitions. [2021-11-12 23:29:11,830 INFO L78 Accepts]: Start accepts. Automaton has 10899 states and 15962 transitions. Word has length 168 [2021-11-12 23:29:11,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:29:11,831 INFO L470 AbstractCegarLoop]: Abstraction has 10899 states and 15962 transitions. [2021-11-12 23:29:11,831 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, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-12 23:29:11,831 INFO L276 IsEmpty]: Start isEmpty. Operand 10899 states and 15962 transitions. [2021-11-12 23:29:11,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2021-11-12 23:29:11,856 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:29:11,856 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 2, 2, 2, 2, 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] [2021-11-12 23:29:11,889 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-12 23:29:12,088 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-12 23:29:12,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:29:12,272 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:29:12,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:29:12,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1976178723, now seen corresponding path program 1 times [2021-11-12 23:29:12,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:29:12,275 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1891576664] [2021-11-12 23:29:12,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:29:12,275 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:29:12,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:29:12,277 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:29:12,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-12 23:29:13,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:29:13,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 1430 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:29:13,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:29:15,291 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 68 proven. 1 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-12 23:29:15,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:29:17,744 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2021-11-12 23:29:17,745 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:29:17,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1891576664] [2021-11-12 23:29:17,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1891576664] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:29:17,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1848601620] [2021-11-12 23:29:17,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:29:17,746 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:29:17,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:29:17,756 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:29:17,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-12 23:29:19,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:29:19,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 1430 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:29:19,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:29:20,006 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-11-12 23:29:20,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:29:20,654 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-11-12 23:29:20,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1848601620] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:29:20,655 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:29:20,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7, 7] total 12 [2021-11-12 23:29:20,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285959998] [2021-11-12 23:29:20,655 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:29:20,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:29:20,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:29:20,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:29:20,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:29:20,656 INFO L87 Difference]: Start difference. First operand 10899 states and 15962 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-12 23:29:22,745 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:29:23,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:29:23,334 INFO L93 Difference]: Finished difference Result 21794 states and 31920 transitions. [2021-11-12 23:29:23,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:29:23,335 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 206 [2021-11-12 23:29:23,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:29:23,392 INFO L225 Difference]: With dead ends: 21794 [2021-11-12 23:29:23,392 INFO L226 Difference]: Without dead ends: 10916 [2021-11-12 23:29:23,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 820 GetRequests, 810 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:29:23,443 INFO L933 BasicCegarLoop]: 2260 mSDtfsCounter, 8 mSDsluCounter, 2255 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2117.23ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 4515 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.97ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2158.30ms IncrementalHoareTripleChecker+Time [2021-11-12 23:29:23,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 4515 Invalid, 6 Unknown, 0 Unchecked, 7.97ms Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 1 Unknown, 0 Unchecked, 2158.30ms Time] [2021-11-12 23:29:23,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10916 states. [2021-11-12 23:29:23,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10916 to 10902. [2021-11-12 23:29:23,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10902 states, 7675 states have (on average 1.397915309446254) internal successors, (10729), 8087 states have internal predecessors, (10729), 2549 states have call successors, (2549), 677 states have call predecessors, (2549), 677 states have return successors, (2685), 2339 states have call predecessors, (2685), 2547 states have call successors, (2685) [2021-11-12 23:29:24,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10902 states to 10902 states and 15963 transitions. [2021-11-12 23:29:24,101 INFO L78 Accepts]: Start accepts. Automaton has 10902 states and 15963 transitions. Word has length 206 [2021-11-12 23:29:24,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:29:24,102 INFO L470 AbstractCegarLoop]: Abstraction has 10902 states and 15963 transitions. [2021-11-12 23:29:24,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-12 23:29:24,102 INFO L276 IsEmpty]: Start isEmpty. Operand 10902 states and 15963 transitions. [2021-11-12 23:29:24,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2021-11-12 23:29:24,133 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:29:24,134 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 3, 2, 2, 2, 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] [2021-11-12 23:29:24,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-12 23:29:24,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-12 23:29:24,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:29:24,556 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:29:24,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:29:24,556 INFO L85 PathProgramCache]: Analyzing trace with hash -149187914, now seen corresponding path program 1 times [2021-11-12 23:29:24,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:29:24,558 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [436095810] [2021-11-12 23:29:24,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:29:24,559 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:29:24,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:29:24,560 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:29:24,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-12 23:29:26,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:29:26,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 1477 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:29:26,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:29:27,718 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 124 proven. 1 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2021-11-12 23:29:27,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:29:29,781 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2021-11-12 23:29:29,781 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:29:29,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [436095810] [2021-11-12 23:29:29,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [436095810] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:29:29,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1093570934] [2021-11-12 23:29:29,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:29:29,782 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:29:29,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:29:29,790 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:29:29,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-12 23:29:30,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:29:30,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 1477 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:29:30,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:29:32,361 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-11-12 23:29:32,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:29:33,373 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 239 trivial. 0 not checked. [2021-11-12 23:29:33,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1093570934] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:29:33,373 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:29:33,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7, 7] total 13 [2021-11-12 23:29:33,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361261697] [2021-11-12 23:29:33,374 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:29:33,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:29:33,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:29:33,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:29:33,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:29:33,375 INFO L87 Difference]: Start difference. First operand 10902 states and 15963 transitions. Second operand has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 4 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2021-11-12 23:29:35,462 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:29:42,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:29:42,227 INFO L93 Difference]: Finished difference Result 26758 states and 39132 transitions. [2021-11-12 23:29:42,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:29:42,228 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 4 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) Word has length 223 [2021-11-12 23:29:42,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:29:42,319 INFO L225 Difference]: With dead ends: 26758 [2021-11-12 23:29:42,319 INFO L226 Difference]: Without dead ends: 15879 [2021-11-12 23:29:42,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 888 GetRequests, 877 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:29:42,440 INFO L933 BasicCegarLoop]: 5571 mSDtfsCounter, 3930 mSDsluCounter, 4939 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 18 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7648.66ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3930 SdHoareTripleChecker+Valid, 10510 SdHoareTripleChecker+Invalid, 630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 28.77ms SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8143.58ms IncrementalHoareTripleChecker+Time [2021-11-12 23:29:42,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3930 Valid, 10510 Invalid, 630 Unknown, 0 Unchecked, 28.77ms Time], IncrementalHoareTripleChecker [18 Valid, 611 Invalid, 1 Unknown, 0 Unchecked, 8143.58ms Time] [2021-11-12 23:29:42,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15879 states. [2021-11-12 23:29:43,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15879 to 15873. [2021-11-12 23:29:43,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15873 states, 11173 states have (on average 1.3956860288194755) internal successors, (15594), 11775 states have internal predecessors, (15594), 3685 states have call successors, (3685), 1014 states have call predecessors, (3685), 1014 states have return successors, (3887), 3369 states have call predecessors, (3887), 3683 states have call successors, (3887) [2021-11-12 23:29:43,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15873 states to 15873 states and 23166 transitions. [2021-11-12 23:29:43,475 INFO L78 Accepts]: Start accepts. Automaton has 15873 states and 23166 transitions. Word has length 223 [2021-11-12 23:29:43,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:29:43,476 INFO L470 AbstractCegarLoop]: Abstraction has 15873 states and 23166 transitions. [2021-11-12 23:29:43,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 4 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2021-11-12 23:29:43,477 INFO L276 IsEmpty]: Start isEmpty. Operand 15873 states and 23166 transitions. [2021-11-12 23:29:43,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2021-11-12 23:29:43,583 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:29:43,584 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:29:43,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-12 23:29:43,838 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-12 23:29:43,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:29:43,999 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:29:43,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:29:44,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1287257945, now seen corresponding path program 1 times [2021-11-12 23:29:44,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:29:44,001 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [515451296] [2021-11-12 23:29:44,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:29:44,002 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:29:44,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:29:44,003 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:29:44,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-12 23:29:45,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:29:45,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 1714 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:29:45,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:29:47,793 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-11-12 23:29:47,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:29:49,924 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-12 23:29:49,925 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:29:49,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [515451296] [2021-11-12 23:29:49,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [515451296] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:29:49,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [597160406] [2021-11-12 23:29:49,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:29:49,925 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:29:49,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:29:49,932 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:29:49,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-12 23:29:51,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:29:51,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 1714 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-12 23:29:51,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:29:54,326 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-11-12 23:29:54,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:30:00,790 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2021-11-12 23:30:00,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [597160406] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:30:00,790 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:30:00,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 7, 11] total 26 [2021-11-12 23:30:00,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107655046] [2021-11-12 23:30:00,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:30:00,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-12 23:30:00,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:30:00,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-12 23:30:00,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2021-11-12 23:30:00,793 INFO L87 Difference]: Start difference. First operand 15873 states and 23166 transitions. Second operand has 9 states, 8 states have (on average 19.75) internal successors, (158), 7 states have internal predecessors, (158), 3 states have call successors, (35), 2 states have call predecessors, (35), 5 states have return successors, (34), 4 states have call predecessors, (34), 3 states have call successors, (34) [2021-11-12 23:30:02,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:30:02,302 INFO L93 Difference]: Finished difference Result 24218 states and 35723 transitions. [2021-11-12 23:30:02,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:30:02,303 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 19.75) internal successors, (158), 7 states have internal predecessors, (158), 3 states have call successors, (35), 2 states have call predecessors, (35), 5 states have return successors, (34), 4 states have call predecessors, (34), 3 states have call successors, (34) Word has length 283 [2021-11-12 23:30:02,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:30:02,553 INFO L225 Difference]: With dead ends: 24218 [2021-11-12 23:30:02,553 INFO L226 Difference]: Without dead ends: 16269 [2021-11-12 23:30:02,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1128 GetRequests, 1104 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2021-11-12 23:30:02,584 INFO L933 BasicCegarLoop]: 2284 mSDtfsCounter, 22 mSDsluCounter, 15953 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 786.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 18237 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 38.94ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 833.25ms IncrementalHoareTripleChecker+Time [2021-11-12 23:30:02,584 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 18237 Invalid, 86 Unknown, 0 Unchecked, 38.94ms Time], IncrementalHoareTripleChecker [0 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 833.25ms Time] [2021-11-12 23:30:02,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16269 states. [2021-11-12 23:30:03,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16269 to 15969. [2021-11-12 23:30:03,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15969 states, 11227 states have (on average 1.3937828449274072) internal successors, (15648), 11847 states have internal predecessors, (15648), 3697 states have call successors, (3697), 1014 states have call predecessors, (3697), 1044 states have return successors, (3965), 3393 states have call predecessors, (3965), 3695 states have call successors, (3965) [2021-11-12 23:30:03,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15969 states to 15969 states and 23310 transitions. [2021-11-12 23:30:03,369 INFO L78 Accepts]: Start accepts. Automaton has 15969 states and 23310 transitions. Word has length 283 [2021-11-12 23:30:03,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:30:03,370 INFO L470 AbstractCegarLoop]: Abstraction has 15969 states and 23310 transitions. [2021-11-12 23:30:03,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 19.75) internal successors, (158), 7 states have internal predecessors, (158), 3 states have call successors, (35), 2 states have call predecessors, (35), 5 states have return successors, (34), 4 states have call predecessors, (34), 3 states have call successors, (34) [2021-11-12 23:30:03,371 INFO L276 IsEmpty]: Start isEmpty. Operand 15969 states and 23310 transitions. [2021-11-12 23:30:03,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2021-11-12 23:30:03,442 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:30:03,442 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:30:03,458 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-11-12 23:30:03,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-12 23:30:03,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:30:03,856 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:30:03,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:30:03,856 INFO L85 PathProgramCache]: Analyzing trace with hash 110767632, now seen corresponding path program 1 times [2021-11-12 23:30:03,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:30:03,858 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2054012] [2021-11-12 23:30:03,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:30:03,859 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:30:03,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:30:03,860 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:30:03,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-12 23:30:05,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:30:05,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 1731 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:30:05,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:30:07,781 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 33 proven. 1 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-11-12 23:30:07,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:30:09,737 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-11-12 23:30:09,737 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:30:09,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2054012] [2021-11-12 23:30:09,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2054012] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:30:09,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1589990003] [2021-11-12 23:30:09,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:30:09,737 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:30:09,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:30:09,738 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:30:09,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-12 23:30:12,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:30:12,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 1731 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:30:12,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:30:14,243 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 33 proven. 1 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-11-12 23:30:14,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:30:15,785 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-11-12 23:30:15,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1589990003] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:30:15,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590044657] [2021-11-12 23:30:15,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:30:15,786 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:30:15,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:30:15,788 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:30:15,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-12 23:30:16,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:30:16,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 1731 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 23:30:16,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:30:19,992 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-12 23:30:19,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:30:22,638 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2021-11-12 23:30:22,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590044657] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:30:22,638 INFO L186 FreeRefinementEngine]: Found 2 perfect and 4 imperfect interpolant sequences. [2021-11-12 23:30:22,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 9] imperfect sequences [7, 7, 7, 7] total 23 [2021-11-12 23:30:22,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838868215] [2021-11-12 23:30:22,639 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:30:22,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-12 23:30:22,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:30:22,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-12 23:30:22,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-11-12 23:30:22,641 INFO L87 Difference]: Start difference. First operand 15969 states and 23310 transitions. Second operand has 14 states, 14 states have (on average 19.928571428571427) internal successors, (279), 14 states have internal predecessors, (279), 2 states have call successors, (62), 2 states have call predecessors, (62), 2 states have return successors, (61), 2 states have call predecessors, (61), 2 states have call successors, (61) [2021-11-12 23:30:24,781 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:30:26,788 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:30:28,794 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:30:30,805 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:31:11,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:31:11,598 INFO L93 Difference]: Finished difference Result 37956 states and 56464 transitions. [2021-11-12 23:31:11,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-12 23:31:11,599 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 19.928571428571427) internal successors, (279), 14 states have internal predecessors, (279), 2 states have call successors, (62), 2 states have call predecessors, (62), 2 states have return successors, (61), 2 states have call predecessors, (61), 2 states have call successors, (61) Word has length 290 [2021-11-12 23:31:11,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:31:11,812 INFO L225 Difference]: With dead ends: 37956 [2021-11-12 23:31:11,812 INFO L226 Difference]: Without dead ends: 22020 [2021-11-12 23:31:11,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1742 GetRequests, 1713 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=206, Invalid=724, Unknown=0, NotChecked=0, Total=930 [2021-11-12 23:31:11,859 INFO L933 BasicCegarLoop]: 3115 mSDtfsCounter, 7662 mSDsluCounter, 6975 mSDsCounter, 0 mSdLazyCounter, 4592 mSolverCounterSat, 2642 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 44075.55ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7776 SdHoareTripleChecker+Valid, 10090 SdHoareTripleChecker+Invalid, 7238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 80.45ms SdHoareTripleChecker+Time, 2642 IncrementalHoareTripleChecker+Valid, 4592 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 45510.27ms IncrementalHoareTripleChecker+Time [2021-11-12 23:31:11,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7776 Valid, 10090 Invalid, 7238 Unknown, 0 Unchecked, 80.45ms Time], IncrementalHoareTripleChecker [2642 Valid, 4592 Invalid, 4 Unknown, 0 Unchecked, 45510.27ms Time] [2021-11-12 23:31:11,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22020 states. [2021-11-12 23:31:12,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22020 to 15945. [2021-11-12 23:31:12,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15945 states, 11215 states have (on average 1.3931341952741862) internal successors, (15624), 11835 states have internal predecessors, (15624), 3685 states have call successors, (3685), 1014 states have call predecessors, (3685), 1044 states have return successors, (3947), 3381 states have call predecessors, (3947), 3683 states have call successors, (3947) [2021-11-12 23:31:12,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15945 states to 15945 states and 23256 transitions. [2021-11-12 23:31:12,991 INFO L78 Accepts]: Start accepts. Automaton has 15945 states and 23256 transitions. Word has length 290 [2021-11-12 23:31:12,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:31:12,992 INFO L470 AbstractCegarLoop]: Abstraction has 15945 states and 23256 transitions. [2021-11-12 23:31:12,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 19.928571428571427) internal successors, (279), 14 states have internal predecessors, (279), 2 states have call successors, (62), 2 states have call predecessors, (62), 2 states have return successors, (61), 2 states have call predecessors, (61), 2 states have call successors, (61) [2021-11-12 23:31:12,992 INFO L276 IsEmpty]: Start isEmpty. Operand 15945 states and 23256 transitions. [2021-11-12 23:31:13,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2021-11-12 23:31:13,044 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:31:13,044 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:31:13,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-12 23:31:13,299 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-12 23:31:13,517 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-12 23:31:13,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:31:13,658 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:31:13,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:31:13,658 INFO L85 PathProgramCache]: Analyzing trace with hash -446877123, now seen corresponding path program 1 times [2021-11-12 23:31:13,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:31:13,661 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [579964867] [2021-11-12 23:31:13,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:31:13,661 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:31:13,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:31:13,669 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:31:13,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-12 23:31:15,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:31:15,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 1729 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:31:15,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:31:17,480 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 33 proven. 1 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-11-12 23:31:17,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:31:19,528 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-11-12 23:31:19,528 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:31:19,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [579964867] [2021-11-12 23:31:19,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [579964867] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:31:19,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [985812580] [2021-11-12 23:31:19,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:31:19,529 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:31:19,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:31:19,529 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:31:19,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-12 23:31:22,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:31:22,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 1729 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:31:22,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:31:24,159 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 33 proven. 1 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-11-12 23:31:24,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:31:25,708 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-11-12 23:31:25,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [985812580] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:31:25,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574426906] [2021-11-12 23:31:25,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:31:25,709 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:31:25,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:31:25,716 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:31:25,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-12 23:31:26,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:31:26,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 1729 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:31:26,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:31:29,710 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-12 23:31:29,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:31:32,078 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2021-11-12 23:31:32,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574426906] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:31:32,078 INFO L186 FreeRefinementEngine]: Found 2 perfect and 4 imperfect interpolant sequences. [2021-11-12 23:31:32,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 6] imperfect sequences [7, 7, 7, 7] total 18 [2021-11-12 23:31:32,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504307964] [2021-11-12 23:31:32,079 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:31:32,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-12 23:31:32,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:31:32,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-12 23:31:32,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-11-12 23:31:32,080 INFO L87 Difference]: Start difference. First operand 15945 states and 23256 transitions. Second operand has 9 states, 9 states have (on average 30.77777777777778) internal successors, (277), 9 states have internal predecessors, (277), 2 states have call successors, (62), 2 states have call predecessors, (62), 2 states have return successors, (61), 2 states have call predecessors, (61), 2 states have call successors, (61) [2021-11-12 23:31:34,191 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:31:36,200 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:31:51,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:31:51,324 INFO L93 Difference]: Finished difference Result 31846 states and 46444 transitions. [2021-11-12 23:31:51,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:31:51,325 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 30.77777777777778) internal successors, (277), 9 states have internal predecessors, (277), 2 states have call successors, (62), 2 states have call predecessors, (62), 2 states have return successors, (61), 2 states have call predecessors, (61), 2 states have call successors, (61) Word has length 289 [2021-11-12 23:31:51,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:31:51,417 INFO L225 Difference]: With dead ends: 31846 [2021-11-12 23:31:51,418 INFO L226 Difference]: Without dead ends: 15934 [2021-11-12 23:31:51,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1729 GetRequests, 1712 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-11-12 23:31:51,472 INFO L933 BasicCegarLoop]: 2130 mSDtfsCounter, 2621 mSDsluCounter, 2523 mSDsCounter, 0 mSdLazyCounter, 1506 mSolverCounterSat, 123 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17397.87ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2737 SdHoareTripleChecker+Valid, 4653 SdHoareTripleChecker+Invalid, 1631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 23.23ms SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 1506 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18077.07ms IncrementalHoareTripleChecker+Time [2021-11-12 23:31:51,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2737 Valid, 4653 Invalid, 1631 Unknown, 0 Unchecked, 23.23ms Time], IncrementalHoareTripleChecker [123 Valid, 1506 Invalid, 2 Unknown, 0 Unchecked, 18077.07ms Time] [2021-11-12 23:31:51,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15934 states. [2021-11-12 23:31:52,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15934 to 15921. [2021-11-12 23:31:52,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15921 states, 11203 states have (on average 1.3924841560296348) internal successors, (15600), 11823 states have internal predecessors, (15600), 3673 states have call successors, (3673), 1014 states have call predecessors, (3673), 1044 states have return successors, (3929), 3369 states have call predecessors, (3929), 3671 states have call successors, (3929) [2021-11-12 23:31:52,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15921 states to 15921 states and 23202 transitions. [2021-11-12 23:31:52,509 INFO L78 Accepts]: Start accepts. Automaton has 15921 states and 23202 transitions. Word has length 289 [2021-11-12 23:31:52,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:31:52,510 INFO L470 AbstractCegarLoop]: Abstraction has 15921 states and 23202 transitions. [2021-11-12 23:31:52,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 30.77777777777778) internal successors, (277), 9 states have internal predecessors, (277), 2 states have call successors, (62), 2 states have call predecessors, (62), 2 states have return successors, (61), 2 states have call predecessors, (61), 2 states have call successors, (61) [2021-11-12 23:31:52,511 INFO L276 IsEmpty]: Start isEmpty. Operand 15921 states and 23202 transitions. [2021-11-12 23:31:52,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2021-11-12 23:31:52,673 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:31:52,673 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:31:52,699 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-11-12 23:31:52,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-12 23:31:53,121 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-12 23:31:53,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:31:53,295 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:31:53,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:31:53,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1641817263, now seen corresponding path program 1 times [2021-11-12 23:31:53,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:31:53,297 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2007952782] [2021-11-12 23:31:53,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:31:53,297 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:31:53,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:31:53,298 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:31:53,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-12 23:31:54,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:31:54,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 1727 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:31:54,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:31:57,050 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 33 proven. 1 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-11-12 23:31:57,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:31:59,306 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-11-12 23:31:59,306 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:31:59,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2007952782] [2021-11-12 23:31:59,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2007952782] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:31:59,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [546874241] [2021-11-12 23:31:59,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:31:59,307 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:31:59,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:31:59,308 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:31:59,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-11-12 23:32:01,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:32:01,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 1727 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:32:01,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:32:03,725 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 33 proven. 1 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-11-12 23:32:03,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:32:05,299 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-11-12 23:32:05,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [546874241] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:32:05,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991332333] [2021-11-12 23:32:05,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:32:05,300 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:32:05,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:32:05,302 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:32:05,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-12 23:32:06,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:32:06,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 1727 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:32:06,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:32:08,900 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-12 23:32:08,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:32:11,004 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2021-11-12 23:32:11,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991332333] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:32:11,005 INFO L186 FreeRefinementEngine]: Found 2 perfect and 4 imperfect interpolant sequences. [2021-11-12 23:32:11,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 6] imperfect sequences [7, 7, 7, 7] total 18 [2021-11-12 23:32:11,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099147510] [2021-11-12 23:32:11,005 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:32:11,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-12 23:32:11,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:32:11,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-12 23:32:11,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-11-12 23:32:11,007 INFO L87 Difference]: Start difference. First operand 15921 states and 23202 transitions. Second operand has 9 states, 9 states have (on average 30.555555555555557) internal successors, (275), 9 states have internal predecessors, (275), 2 states have call successors, (62), 2 states have call predecessors, (62), 2 states have return successors, (61), 2 states have call predecessors, (61), 2 states have call successors, (61) [2021-11-12 23:32:13,096 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:32:15,106 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:32:29,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:32:29,619 INFO L93 Difference]: Finished difference Result 31798 states and 46336 transitions. [2021-11-12 23:32:29,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:32:29,620 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 30.555555555555557) internal successors, (275), 9 states have internal predecessors, (275), 2 states have call successors, (62), 2 states have call predecessors, (62), 2 states have return successors, (61), 2 states have call predecessors, (61), 2 states have call successors, (61) Word has length 288 [2021-11-12 23:32:29,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:32:29,692 INFO L225 Difference]: With dead ends: 31798 [2021-11-12 23:32:29,693 INFO L226 Difference]: Without dead ends: 15910 [2021-11-12 23:32:29,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1723 GetRequests, 1706 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-11-12 23:32:29,738 INFO L933 BasicCegarLoop]: 2127 mSDtfsCounter, 5625 mSDsluCounter, 2521 mSDsCounter, 0 mSdLazyCounter, 1502 mSolverCounterSat, 1595 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16746.80ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5740 SdHoareTripleChecker+Valid, 4648 SdHoareTripleChecker+Invalid, 3099 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 25.91ms SdHoareTripleChecker+Time, 1595 IncrementalHoareTripleChecker+Valid, 1502 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17484.79ms IncrementalHoareTripleChecker+Time [2021-11-12 23:32:29,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5740 Valid, 4648 Invalid, 3099 Unknown, 0 Unchecked, 25.91ms Time], IncrementalHoareTripleChecker [1595 Valid, 1502 Invalid, 2 Unknown, 0 Unchecked, 17484.79ms Time] [2021-11-12 23:32:29,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15910 states. [2021-11-12 23:32:30,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15910 to 15897. [2021-11-12 23:32:30,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15897 states, 11191 states have (on average 1.3918327227236171) internal successors, (15576), 11811 states have internal predecessors, (15576), 3661 states have call successors, (3661), 1014 states have call predecessors, (3661), 1044 states have return successors, (3911), 3357 states have call predecessors, (3911), 3659 states have call successors, (3911) [2021-11-12 23:32:30,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15897 states to 15897 states and 23148 transitions. [2021-11-12 23:32:30,658 INFO L78 Accepts]: Start accepts. Automaton has 15897 states and 23148 transitions. Word has length 288 [2021-11-12 23:32:30,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:32:30,659 INFO L470 AbstractCegarLoop]: Abstraction has 15897 states and 23148 transitions. [2021-11-12 23:32:30,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 30.555555555555557) internal successors, (275), 9 states have internal predecessors, (275), 2 states have call successors, (62), 2 states have call predecessors, (62), 2 states have return successors, (61), 2 states have call predecessors, (61), 2 states have call successors, (61) [2021-11-12 23:32:30,659 INFO L276 IsEmpty]: Start isEmpty. Operand 15897 states and 23148 transitions. [2021-11-12 23:32:30,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2021-11-12 23:32:30,706 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:32:30,706 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:32:30,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-12 23:32:30,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2021-11-12 23:32:31,160 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-12 23:32:31,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:32:31,321 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:32:31,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:32:31,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1907875364, now seen corresponding path program 1 times [2021-11-12 23:32:31,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:32:31,323 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [123103521] [2021-11-12 23:32:31,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:32:31,323 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:32:31,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:32:31,324 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:32:31,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-12 23:32:32,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:32:32,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 1733 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:32:32,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:32:35,071 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 33 proven. 1 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-11-12 23:32:35,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:32:37,206 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-11-12 23:32:37,206 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:32:37,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [123103521] [2021-11-12 23:32:37,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [123103521] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:32:37,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2117004426] [2021-11-12 23:32:37,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:32:37,207 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:32:37,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:32:37,232 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:32:37,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-11-12 23:32:39,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:32:39,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 1733 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:32:39,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:32:41,635 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 33 proven. 1 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-11-12 23:32:41,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:32:43,238 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-11-12 23:32:43,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2117004426] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:32:43,238 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342343821] [2021-11-12 23:32:43,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:32:43,239 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:32:43,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:32:43,240 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:32:43,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-12 23:32:44,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:32:44,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 1733 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:32:44,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:32:46,879 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-12 23:32:46,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:32:48,845 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2021-11-12 23:32:48,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342343821] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:32:48,846 INFO L186 FreeRefinementEngine]: Found 2 perfect and 4 imperfect interpolant sequences. [2021-11-12 23:32:48,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 6] imperfect sequences [7, 7, 7, 7] total 18 [2021-11-12 23:32:48,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987440730] [2021-11-12 23:32:48,847 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:32:48,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-12 23:32:48,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:32:48,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-12 23:32:48,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-11-12 23:32:48,849 INFO L87 Difference]: Start difference. First operand 15897 states and 23148 transitions. Second operand has 9 states, 9 states have (on average 31.22222222222222) internal successors, (281), 9 states have internal predecessors, (281), 2 states have call successors, (62), 2 states have call predecessors, (62), 2 states have return successors, (61), 2 states have call predecessors, (61), 2 states have call successors, (61) [2021-11-12 23:32:50,939 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:32:52,952 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:33:08,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:33:08,167 INFO L93 Difference]: Finished difference Result 31750 states and 46228 transitions. [2021-11-12 23:33:08,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:33:08,168 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 31.22222222222222) internal successors, (281), 9 states have internal predecessors, (281), 2 states have call successors, (62), 2 states have call predecessors, (62), 2 states have return successors, (61), 2 states have call predecessors, (61), 2 states have call successors, (61) Word has length 291 [2021-11-12 23:33:08,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:33:08,242 INFO L225 Difference]: With dead ends: 31750 [2021-11-12 23:33:08,242 INFO L226 Difference]: Without dead ends: 15886 [2021-11-12 23:33:08,283 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1741 GetRequests, 1724 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-11-12 23:33:08,284 INFO L933 BasicCegarLoop]: 2124 mSDtfsCounter, 6195 mSDsluCounter, 2519 mSDsCounter, 0 mSdLazyCounter, 1498 mSolverCounterSat, 2190 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17264.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6309 SdHoareTripleChecker+Valid, 4643 SdHoareTripleChecker+Invalid, 3690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 28.54ms SdHoareTripleChecker+Time, 2190 IncrementalHoareTripleChecker+Valid, 1498 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18042.48ms IncrementalHoareTripleChecker+Time [2021-11-12 23:33:08,285 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6309 Valid, 4643 Invalid, 3690 Unknown, 0 Unchecked, 28.54ms Time], IncrementalHoareTripleChecker [2190 Valid, 1498 Invalid, 2 Unknown, 0 Unchecked, 18042.48ms Time] [2021-11-12 23:33:08,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15886 states. [2021-11-12 23:33:09,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15886 to 15873. [2021-11-12 23:33:09,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15873 states, 11179 states have (on average 1.3911798908668038) internal successors, (15552), 11799 states have internal predecessors, (15552), 3649 states have call successors, (3649), 1014 states have call predecessors, (3649), 1044 states have return successors, (3893), 3345 states have call predecessors, (3893), 3647 states have call successors, (3893) [2021-11-12 23:33:09,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15873 states to 15873 states and 23094 transitions. [2021-11-12 23:33:09,168 INFO L78 Accepts]: Start accepts. Automaton has 15873 states and 23094 transitions. Word has length 291 [2021-11-12 23:33:09,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:33:09,168 INFO L470 AbstractCegarLoop]: Abstraction has 15873 states and 23094 transitions. [2021-11-12 23:33:09,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 31.22222222222222) internal successors, (281), 9 states have internal predecessors, (281), 2 states have call successors, (62), 2 states have call predecessors, (62), 2 states have return successors, (61), 2 states have call predecessors, (61), 2 states have call successors, (61) [2021-11-12 23:33:09,169 INFO L276 IsEmpty]: Start isEmpty. Operand 15873 states and 23094 transitions. [2021-11-12 23:33:09,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2021-11-12 23:33:09,199 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:33:09,199 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-12 23:33:09,234 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (30)] Ended with exit code 0 [2021-11-12 23:33:09,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-12 23:33:09,652 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2021-11-12 23:33:09,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:33:09,821 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:33:09,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:33:09,822 INFO L85 PathProgramCache]: Analyzing trace with hash 960073296, now seen corresponding path program 1 times [2021-11-12 23:33:09,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:33:09,824 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [393736207] [2021-11-12 23:33:09,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:33:09,824 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:33:09,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:33:09,825 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:33:09,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-12 23:33:11,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:33:11,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 1723 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:33:11,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:33:13,708 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 124 proven. 1 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2021-11-12 23:33:13,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:33:16,227 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2021-11-12 23:33:16,227 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:33:16,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [393736207] [2021-11-12 23:33:16,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [393736207] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:33:16,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [906795811] [2021-11-12 23:33:16,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:33:16,228 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:33:16,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:33:16,228 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:33:16,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2021-11-12 23:33:17,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:33:17,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 1723 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:33:17,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:33:18,959 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 362 trivial. 0 not checked. [2021-11-12 23:33:18,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:33:20,209 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 362 trivial. 0 not checked. [2021-11-12 23:33:20,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [906795811] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:33:20,210 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:33:20,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [7, 7] total 17 [2021-11-12 23:33:20,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363632614] [2021-11-12 23:33:20,211 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:33:20,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:33:20,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:33:20,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:33:20,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-11-12 23:33:20,213 INFO L87 Difference]: Start difference. First operand 15873 states and 23094 transitions. Second operand has 8 states, 8 states have (on average 16.375) internal successors, (131), 8 states have internal predecessors, (131), 2 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (42), 2 states have call predecessors, (42), 2 states have call successors, (42) [2021-11-12 23:33:22,300 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:33:44,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:33:44,133 INFO L93 Difference]: Finished difference Result 35225 states and 51871 transitions. [2021-11-12 23:33:44,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-12 23:33:44,134 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 16.375) internal successors, (131), 8 states have internal predecessors, (131), 2 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (42), 2 states have call predecessors, (42), 2 states have call successors, (42) Word has length 298 [2021-11-12 23:33:44,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:33:44,226 INFO L225 Difference]: With dead ends: 35225 [2021-11-12 23:33:44,226 INFO L226 Difference]: Without dead ends: 29782 [2021-11-12 23:33:44,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1203 GetRequests, 1178 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2021-11-12 23:33:44,247 INFO L933 BasicCegarLoop]: 4655 mSDtfsCounter, 7812 mSDsluCounter, 22778 mSDsCounter, 0 mSdLazyCounter, 1798 mSolverCounterSat, 1336 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19616.43ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7917 SdHoareTripleChecker+Valid, 27433 SdHoareTripleChecker+Invalid, 3135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 72.20ms SdHoareTripleChecker+Time, 1336 IncrementalHoareTripleChecker+Valid, 1798 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20751.03ms IncrementalHoareTripleChecker+Time [2021-11-12 23:33:44,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7917 Valid, 27433 Invalid, 3135 Unknown, 0 Unchecked, 72.20ms Time], IncrementalHoareTripleChecker [1336 Valid, 1798 Invalid, 1 Unknown, 0 Unchecked, 20751.03ms Time] [2021-11-12 23:33:44,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29782 states. [2021-11-12 23:33:45,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29782 to 15895. [2021-11-12 23:33:45,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15895 states, 11193 states have (on average 1.3906906102028054) internal successors, (15566), 11813 states have internal predecessors, (15566), 3657 states have call successors, (3657), 1014 states have call predecessors, (3657), 1044 states have return successors, (3901), 3353 states have call predecessors, (3901), 3655 states have call successors, (3901) [2021-11-12 23:33:45,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15895 states to 15895 states and 23124 transitions. [2021-11-12 23:33:45,449 INFO L78 Accepts]: Start accepts. Automaton has 15895 states and 23124 transitions. Word has length 298 [2021-11-12 23:33:45,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:33:45,450 INFO L470 AbstractCegarLoop]: Abstraction has 15895 states and 23124 transitions. [2021-11-12 23:33:45,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.375) internal successors, (131), 8 states have internal predecessors, (131), 2 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (42), 2 states have call predecessors, (42), 2 states have call successors, (42) [2021-11-12 23:33:45,451 INFO L276 IsEmpty]: Start isEmpty. Operand 15895 states and 23124 transitions. [2021-11-12 23:33:45,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2021-11-12 23:33:45,468 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:33:45,469 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-12 23:33:45,498 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-11-12 23:33:45,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2021-11-12 23:33:45,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:33:45,870 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:33:45,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:33:45,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1733822894, now seen corresponding path program 1 times [2021-11-12 23:33:45,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:33:45,872 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1118576620] [2021-11-12 23:33:45,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:33:45,872 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:33:45,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:33:45,873 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:33:45,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-12 23:33:47,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:33:47,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 1721 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:33:47,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:33:49,595 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 124 proven. 1 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2021-11-12 23:33:49,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:33:52,043 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2021-11-12 23:33:52,043 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:33:52,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1118576620] [2021-11-12 23:33:52,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1118576620] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:33:52,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [819915694] [2021-11-12 23:33:52,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:33:52,044 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:33:52,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:33:52,045 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:33:52,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2021-11-12 23:33:53,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:33:53,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 1721 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-12 23:33:53,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:33:55,578 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 357 trivial. 0 not checked. [2021-11-12 23:33:55,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:33:57,744 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2021-11-12 23:33:57,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [819915694] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:33:57,744 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326403632] [2021-11-12 23:33:57,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:33:57,744 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:33:57,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:33:57,745 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:33:57,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-12 23:33:58,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:33:58,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 1721 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:33:58,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:34:00,209 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 358 trivial. 0 not checked. [2021-11-12 23:34:00,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:34:01,417 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2021-11-12 23:34:01,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326403632] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:34:01,417 INFO L186 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2021-11-12 23:34:01,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 7, 7, 5, 5] total 19 [2021-11-12 23:34:01,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635120876] [2021-11-12 23:34:01,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:34:01,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:34:01,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:34:01,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:34:01,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-11-12 23:34:01,420 INFO L87 Difference]: Start difference. First operand 15895 states and 23124 transitions. Second operand has 5 states, 5 states have (on average 24.0) internal successors, (120), 4 states have internal predecessors, (120), 2 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (30), 3 states have call predecessors, (30), 2 states have call successors, (30) [2021-11-12 23:34:03,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:34:03,057 INFO L93 Difference]: Finished difference Result 21380 states and 31141 transitions. [2021-11-12 23:34:03,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:34:03,058 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.0) internal successors, (120), 4 states have internal predecessors, (120), 2 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (30), 3 states have call predecessors, (30), 2 states have call successors, (30) Word has length 298 [2021-11-12 23:34:03,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:34:03,114 INFO L225 Difference]: With dead ends: 21380 [2021-11-12 23:34:03,114 INFO L226 Difference]: Without dead ends: 15915 [2021-11-12 23:34:03,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1783 GetRequests, 1765 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-11-12 23:34:03,135 INFO L933 BasicCegarLoop]: 2247 mSDtfsCounter, 1 mSDsluCounter, 6731 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 516.01ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 8978 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.90ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 527.49ms IncrementalHoareTripleChecker+Time [2021-11-12 23:34:03,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 8978 Invalid, 16 Unknown, 0 Unchecked, 13.90ms Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 527.49ms Time] [2021-11-12 23:34:03,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15915 states. [2021-11-12 23:34:04,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15915 to 15903. [2021-11-12 23:34:04,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15903 states, 11201 states have (on average 1.3904115703955005) internal successors, (15574), 11817 states have internal predecessors, (15574), 3657 states have call successors, (3657), 1014 states have call predecessors, (3657), 1044 states have return successors, (3901), 3357 states have call predecessors, (3901), 3655 states have call successors, (3901) [2021-11-12 23:34:04,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15903 states to 15903 states and 23132 transitions. [2021-11-12 23:34:04,236 INFO L78 Accepts]: Start accepts. Automaton has 15903 states and 23132 transitions. Word has length 298 [2021-11-12 23:34:04,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:34:04,237 INFO L470 AbstractCegarLoop]: Abstraction has 15903 states and 23132 transitions. [2021-11-12 23:34:04,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.0) internal successors, (120), 4 states have internal predecessors, (120), 2 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (30), 3 states have call predecessors, (30), 2 states have call successors, (30) [2021-11-12 23:34:04,237 INFO L276 IsEmpty]: Start isEmpty. Operand 15903 states and 23132 transitions. [2021-11-12 23:34:04,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2021-11-12 23:34:04,257 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:34:04,258 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 3, 3, 3, 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] [2021-11-12 23:34:04,303 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-12 23:34:04,482 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 0 [2021-11-12 23:34:04,699 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-11-12 23:34:04,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:34:04,871 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:34:04,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:34:04,871 INFO L85 PathProgramCache]: Analyzing trace with hash 689998524, now seen corresponding path program 1 times [2021-11-12 23:34:04,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:34:04,873 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1177268030] [2021-11-12 23:34:04,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:34:04,873 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:34:04,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:34:04,874 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:34:04,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-11-12 23:34:06,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:34:06,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 1736 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:34:06,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:34:08,741 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 140 proven. 1 refuted. 0 times theorem prover too weak. 257 trivial. 0 not checked. [2021-11-12 23:34:08,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:34:11,239 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 387 trivial. 0 not checked. [2021-11-12 23:34:11,239 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:34:11,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1177268030] [2021-11-12 23:34:11,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1177268030] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:34:11,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1926633227] [2021-11-12 23:34:11,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:34:11,240 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:34:11,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:34:11,241 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:34:11,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2021-11-12 23:34:12,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:34:12,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 1736 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-12 23:34:12,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:34:15,525 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 383 trivial. 0 not checked. [2021-11-12 23:34:15,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:34:19,488 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2021-11-12 23:34:19,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1926633227] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:34:19,488 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-12 23:34:19,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 7, 11] total 26 [2021-11-12 23:34:19,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548330826] [2021-11-12 23:34:19,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:34:19,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-12 23:34:19,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:34:19,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-12 23:34:19,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2021-11-12 23:34:19,490 INFO L87 Difference]: Start difference. First operand 15903 states and 23132 transitions. Second operand has 9 states, 8 states have (on average 15.0) internal successors, (120), 7 states have internal predecessors, (120), 3 states have call successors, (32), 2 states have call predecessors, (32), 4 states have return successors, (31), 4 states have call predecessors, (31), 3 states have call successors, (31) [2021-11-12 23:34:21,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:34:21,192 INFO L93 Difference]: Finished difference Result 19927 states and 29176 transitions. [2021-11-12 23:34:21,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:34:21,193 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 15.0) internal successors, (120), 7 states have internal predecessors, (120), 3 states have call successors, (32), 2 states have call predecessors, (32), 4 states have return successors, (31), 4 states have call predecessors, (31), 3 states have call successors, (31) Word has length 304 [2021-11-12 23:34:21,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:34:21,242 INFO L225 Difference]: With dead ends: 19927 [2021-11-12 23:34:21,242 INFO L226 Difference]: Without dead ends: 17188 [2021-11-12 23:34:21,252 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1212 GetRequests, 1188 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2021-11-12 23:34:21,253 INFO L933 BasicCegarLoop]: 2865 mSDtfsCounter, 455 mSDsluCounter, 16644 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 784.56ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 563 SdHoareTripleChecker+Valid, 19509 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 19.89ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 834.33ms IncrementalHoareTripleChecker+Time [2021-11-12 23:34:21,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [563 Valid, 19509 Invalid, 91 Unknown, 0 Unchecked, 19.89ms Time], IncrementalHoareTripleChecker [0 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 834.33ms Time] [2021-11-12 23:34:21,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17188 states. [2021-11-12 23:34:22,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17188 to 15907. [2021-11-12 23:34:22,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15907 states, 11203 states have (on average 1.3903418727126662) internal successors, (15576), 11819 states have internal predecessors, (15576), 3659 states have call successors, (3659), 1014 states have call predecessors, (3659), 1044 states have return successors, (3903), 3359 states have call predecessors, (3903), 3657 states have call successors, (3903) [2021-11-12 23:34:22,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15907 states to 15907 states and 23138 transitions. [2021-11-12 23:34:22,145 INFO L78 Accepts]: Start accepts. Automaton has 15907 states and 23138 transitions. Word has length 304 [2021-11-12 23:34:22,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:34:22,146 INFO L470 AbstractCegarLoop]: Abstraction has 15907 states and 23138 transitions. [2021-11-12 23:34:22,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 15.0) internal successors, (120), 7 states have internal predecessors, (120), 3 states have call successors, (32), 2 states have call predecessors, (32), 4 states have return successors, (31), 4 states have call predecessors, (31), 3 states have call successors, (31) [2021-11-12 23:34:22,146 INFO L276 IsEmpty]: Start isEmpty. Operand 15907 states and 23138 transitions. [2021-11-12 23:34:22,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2021-11-12 23:34:22,166 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:34:22,166 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 3, 3, 3, 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] [2021-11-12 23:34:22,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (38)] Forceful destruction successful, exit code 0 [2021-11-12 23:34:22,394 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2021-11-12 23:34:22,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:34:22,567 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:34:22,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:34:22,567 INFO L85 PathProgramCache]: Analyzing trace with hash -708709660, now seen corresponding path program 1 times [2021-11-12 23:34:22,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:34:22,568 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1953339543] [2021-11-12 23:34:22,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:34:22,569 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:34:22,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:34:22,569 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:34:22,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-11-12 23:34:23,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:34:24,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 1736 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:34:24,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:34:26,376 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 140 proven. 1 refuted. 0 times theorem prover too weak. 257 trivial. 0 not checked. [2021-11-12 23:34:26,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:34:28,884 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 387 trivial. 0 not checked. [2021-11-12 23:34:28,884 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:34:28,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1953339543] [2021-11-12 23:34:28,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1953339543] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:34:28,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [93005528] [2021-11-12 23:34:28,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:34:28,885 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:34:28,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:34:28,886 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:34:28,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2021-11-12 23:34:31,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:34:31,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 1736 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:34:31,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:34:33,048 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 140 proven. 1 refuted. 0 times theorem prover too weak. 257 trivial. 0 not checked. [2021-11-12 23:34:33,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:34:34,777 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 387 trivial. 0 not checked. [2021-11-12 23:34:34,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [93005528] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:34:34,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682652860] [2021-11-12 23:34:34,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:34:34,778 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:34:34,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:34:34,779 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:34:34,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-12 23:34:35,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:34:35,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 1736 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:34:35,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:34:37,687 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 140 proven. 1 refuted. 0 times theorem prover too weak. 257 trivial. 0 not checked. [2021-11-12 23:34:37,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:34:39,500 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 387 trivial. 0 not checked. [2021-11-12 23:34:39,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682652860] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:34:39,501 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:34:39,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 11 [2021-11-12 23:34:39,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393041221] [2021-11-12 23:34:39,502 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:34:39,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 23:34:39,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:34:39,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 23:34:39,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:34:39,504 INFO L87 Difference]: Start difference. First operand 15907 states and 23138 transitions. Second operand has 11 states, 9 states have (on average 18.11111111111111) internal successors, (163), 11 states have internal predecessors, (163), 4 states have call successors, (60), 2 states have call predecessors, (60), 5 states have return successors, (60), 4 states have call predecessors, (60), 4 states have call successors, (60) [2021-11-12 23:34:41,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:34:41,840 INFO L93 Difference]: Finished difference Result 31864 states and 46415 transitions. [2021-11-12 23:34:41,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:34:41,842 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 18.11111111111111) internal successors, (163), 11 states have internal predecessors, (163), 4 states have call successors, (60), 2 states have call predecessors, (60), 5 states have return successors, (60), 4 states have call predecessors, (60), 4 states have call successors, (60) Word has length 305 [2021-11-12 23:34:41,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:34:41,895 INFO L225 Difference]: With dead ends: 31864 [2021-11-12 23:34:41,895 INFO L226 Difference]: Without dead ends: 15976 [2021-11-12 23:34:41,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1827 GetRequests, 1815 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:34:41,929 INFO L933 BasicCegarLoop]: 2237 mSDtfsCounter, 9 mSDsluCounter, 15631 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1027.66ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 17868 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.02ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1083.74ms IncrementalHoareTripleChecker+Time [2021-11-12 23:34:41,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 17868 Invalid, 135 Unknown, 0 Unchecked, 16.02ms Time], IncrementalHoareTripleChecker [3 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 1083.74ms Time] [2021-11-12 23:34:41,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15976 states. [2021-11-12 23:34:42,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15976 to 15908. [2021-11-12 23:34:42,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15908 states, 11204 states have (on average 1.3903962870403428) internal successors, (15578), 11820 states have internal predecessors, (15578), 3659 states have call successors, (3659), 1014 states have call predecessors, (3659), 1044 states have return successors, (3903), 3359 states have call predecessors, (3903), 3657 states have call successors, (3903) [2021-11-12 23:34:42,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15908 states to 15908 states and 23140 transitions. [2021-11-12 23:34:42,745 INFO L78 Accepts]: Start accepts. Automaton has 15908 states and 23140 transitions. Word has length 305 [2021-11-12 23:34:42,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:34:42,745 INFO L470 AbstractCegarLoop]: Abstraction has 15908 states and 23140 transitions. [2021-11-12 23:34:42,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 18.11111111111111) internal successors, (163), 11 states have internal predecessors, (163), 4 states have call successors, (60), 2 states have call predecessors, (60), 5 states have return successors, (60), 4 states have call predecessors, (60), 4 states have call successors, (60) [2021-11-12 23:34:42,745 INFO L276 IsEmpty]: Start isEmpty. Operand 15908 states and 23140 transitions. [2021-11-12 23:34:42,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2021-11-12 23:34:42,765 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:34:42,766 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-12 23:34:42,804 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-11-12 23:34:42,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2021-11-12 23:34:43,182 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (40)] Forceful destruction successful, exit code 0 [2021-11-12 23:34:43,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:34:43,367 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:34:43,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:34:43,367 INFO L85 PathProgramCache]: Analyzing trace with hash 1028053062, now seen corresponding path program 2 times [2021-11-12 23:34:43,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:34:43,368 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [42585252] [2021-11-12 23:34:43,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 23:34:43,369 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:34:43,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:34:43,369 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:34:43,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2021-11-12 23:35:47,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 23:35:47,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:35:48,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 1746 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:35:48,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:35:50,550 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 145 proven. 3 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2021-11-12 23:35:50,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:35:53,375 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 389 trivial. 0 not checked. [2021-11-12 23:35:53,375 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:35:53,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [42585252] [2021-11-12 23:35:53,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [42585252] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:35:53,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [590810082] [2021-11-12 23:35:53,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 23:35:53,376 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:35:53,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:35:53,377 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:35:53,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7de8c89-3b00-4cd3-b8c0-1fb85475fecd/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process