./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 234112184b071eb42f340136dfce6e1a552d788d086baea007a05a3140f2d157 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:59:26,629 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:59:26,631 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:59:26,684 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:59:26,685 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:59:26,690 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:59:26,694 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:59:26,699 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:59:26,703 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:59:26,710 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:59:26,712 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:59:26,715 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:59:26,715 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:59:26,719 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:59:26,721 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:59:26,729 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:59:26,731 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:59:26,734 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:59:26,736 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:59:26,746 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:59:26,749 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:59:26,752 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:59:26,756 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:59:26,758 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:59:26,772 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:59:26,773 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:59:26,773 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:59:26,776 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:59:26,777 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:59:26,779 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:59:26,780 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:59:26,782 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:59:26,784 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:59:26,786 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:59:26,788 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:59:26,789 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:59:26,790 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:59:26,790 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:59:26,791 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:59:26,792 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:59:26,793 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:59:26,794 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-19 14:59:26,851 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:59:26,852 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:59:26,854 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:59:26,854 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:59:26,855 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:59:26,855 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:59:26,855 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:59:26,855 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 14:59:26,864 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:59:26,864 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:59:26,865 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 14:59:26,866 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 14:59:26,866 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:59:26,866 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 14:59:26,867 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 14:59:26,867 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 14:59:26,868 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:59:26,868 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 14:59:26,869 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:59:26,869 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:59:26,869 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:59:26,869 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:59:26,870 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:59:26,870 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:59:26,870 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:59:26,870 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:59:26,871 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:59:26,871 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:59:26,871 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:59:26,873 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:59:26,874 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:59:26,874 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:59:26,875 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 14:59:26,875 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 14:59:26,875 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:59:26,875 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:59:26,876 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:59:26,876 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_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 234112184b071eb42f340136dfce6e1a552d788d086baea007a05a3140f2d157 [2021-11-19 14:59:27,179 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:59:27,213 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:59:27,217 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:59:27,218 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:59:27,219 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:59:27,221 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i [2021-11-19 14:59:27,299 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/data/10cdbf76e/760a747f8d8945679a46cb05f5c72f35/FLAGe053770c0 [2021-11-19 14:59:28,175 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:59:28,176 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i [2021-11-19 14:59:28,225 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/data/10cdbf76e/760a747f8d8945679a46cb05f5c72f35/FLAGe053770c0 [2021-11-19 14:59:28,658 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/data/10cdbf76e/760a747f8d8945679a46cb05f5c72f35 [2021-11-19 14:59:28,661 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:59:28,664 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:59:28,668 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:59:28,668 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:59:28,672 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:59:28,674 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:59:28" (1/1) ... [2021-11-19 14:59:28,676 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a93eb4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:59:28, skipping insertion in model container [2021-11-19 14:59:28,676 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:59:28" (1/1) ... [2021-11-19 14:59:28,683 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:59:28,859 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:59:29,794 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 14:59:29,827 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 14:59:30,372 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 14:59:30,634 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 14:59:30,647 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 14:59:30,653 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 14:59:30,724 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 14:59:30,742 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 14:59:30,748 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 14:59:30,759 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 14:59:30,767 WARN L571 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-19 14:59:31,169 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i[254896,254909] [2021-11-19 14:59:31,238 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:59:31,323 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-19 14:59:31,323 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7369cea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:59:31, skipping insertion in model container [2021-11-19 14:59:31,324 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:59:31,324 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 14:59:31,326 INFO L158 Benchmark]: Toolchain (without parser) took 2661.70ms. Allocated memory is still 146.8MB. Free memory was 103.1MB in the beginning and 92.1MB in the end (delta: 10.9MB). Peak memory consumption was 63.3MB. Max. memory is 16.1GB. [2021-11-19 14:59:31,327 INFO L158 Benchmark]: CDTParser took 0.34ms. Allocated memory is still 90.2MB. Free memory was 47.9MB in the beginning and 47.9MB in the end (delta: 41.4kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 14:59:31,328 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2656.49ms. Allocated memory is still 146.8MB. Free memory was 103.1MB in the beginning and 92.1MB in the end (delta: 10.9MB). Peak memory consumption was 63.3MB. Max. memory is 16.1GB. [2021-11-19 14:59:31,330 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34ms. Allocated memory is still 90.2MB. Free memory was 47.9MB in the beginning and 47.9MB in the end (delta: 41.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2656.49ms. Allocated memory is still 146.8MB. Free memory was 103.1MB in the beginning and 92.1MB in the end (delta: 10.9MB). Peak memory consumption was 63.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 3876]: 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_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 234112184b071eb42f340136dfce6e1a552d788d086baea007a05a3140f2d157 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:59:33,976 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:59:33,981 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:59:34,032 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:59:34,033 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:59:34,034 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:59:34,036 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:59:34,039 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:59:34,042 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:59:34,043 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:59:34,045 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:59:34,047 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:59:34,047 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:59:34,049 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:59:34,051 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:59:34,053 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:59:34,054 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:59:34,055 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:59:34,058 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:59:34,061 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:59:34,063 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:59:34,065 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:59:34,067 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:59:34,069 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:59:34,073 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:59:34,073 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:59:34,075 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:59:34,076 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:59:34,077 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:59:34,078 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:59:34,079 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:59:34,080 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:59:34,081 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:59:34,082 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:59:34,083 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:59:34,084 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:59:34,085 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:59:34,085 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:59:34,085 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:59:34,087 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:59:34,088 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:59:34,094 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-19 14:59:34,144 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:59:34,145 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:59:34,146 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:59:34,147 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:59:34,147 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:59:34,147 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:59:34,147 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:59:34,148 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:59:34,148 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:59:34,148 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:59:34,151 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:59:34,151 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:59:34,151 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:59:34,151 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:59:34,152 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:59:34,152 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:59:34,152 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 14:59:34,152 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 14:59:34,153 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:59:34,153 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:59:34,153 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:59:34,153 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:59:34,153 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 14:59:34,154 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:59:34,154 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:59:34,154 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:59:34,154 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:59:34,155 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:59:34,155 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 14:59:34,155 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 14:59:34,155 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:59:34,155 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:59:34,156 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:59:34,156 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_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 234112184b071eb42f340136dfce6e1a552d788d086baea007a05a3140f2d157 [2021-11-19 14:59:34,587 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:59:34,621 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:59:34,625 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:59:34,626 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:59:34,627 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:59:34,629 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i [2021-11-19 14:59:34,714 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/data/e32423b3d/5694fbddf93c4b3ab030ed8dbd5437b9/FLAG94441497b [2021-11-19 14:59:35,930 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:59:35,931 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i [2021-11-19 14:59:35,991 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/data/e32423b3d/5694fbddf93c4b3ab030ed8dbd5437b9/FLAG94441497b [2021-11-19 14:59:36,229 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/data/e32423b3d/5694fbddf93c4b3ab030ed8dbd5437b9 [2021-11-19 14:59:36,234 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:59:36,238 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:59:36,242 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:59:36,242 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:59:36,246 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:59:36,247 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:59:36" (1/1) ... [2021-11-19 14:59:36,248 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e7dffaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:59:36, skipping insertion in model container [2021-11-19 14:59:36,248 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:59:36" (1/1) ... [2021-11-19 14:59:36,257 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:59:36,468 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:59:38,839 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i[254896,254909] [2021-11-19 14:59:38,908 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:59:39,068 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 14:59:39,115 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:59:39,537 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i[254896,254909] [2021-11-19 14:59:39,547 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:59:39,633 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 14:59:40,072 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i[254896,254909] [2021-11-19 14:59:40,085 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:59:40,561 INFO L208 MainTranslator]: Completed translation [2021-11-19 14:59:40,561 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:59:40 WrapperNode [2021-11-19 14:59:40,562 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:59:40,564 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 14:59:40,564 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 14:59:40,564 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 14:59:40,574 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:59:40" (1/1) ... [2021-11-19 14:59:40,744 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:59:40" (1/1) ... [2021-11-19 14:59:41,052 INFO L137 Inliner]: procedures = 301, calls = 3678, calls flagged for inlining = 140, calls inlined = 119, statements flattened = 7683 [2021-11-19 14:59:41,052 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 14:59:41,053 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 14:59:41,054 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 14:59:41,054 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 14:59:41,064 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:59:40" (1/1) ... [2021-11-19 14:59:41,065 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:59:40" (1/1) ... [2021-11-19 14:59:41,112 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:59:40" (1/1) ... [2021-11-19 14:59:41,112 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:59:40" (1/1) ... [2021-11-19 14:59:41,431 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:59:40" (1/1) ... [2021-11-19 14:59:41,481 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:59:40" (1/1) ... [2021-11-19 14:59:41,534 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:59:40" (1/1) ... [2021-11-19 14:59:41,599 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 14:59:41,601 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 14:59:41,605 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 14:59:41,606 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 14:59:41,607 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:59:40" (1/1) ... [2021-11-19 14:59:41,615 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:59:41,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:59:41,644 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 14:59:41,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 14:59:41,708 INFO L130 BoogieDeclarations]: Found specification of procedure acm_disconnect [2021-11-19 14:59:41,709 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_disconnect [2021-11-19 14:59:41,709 INFO L130 BoogieDeclarations]: Found specification of procedure tty_port_tty_hangup [2021-11-19 14:59:41,709 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_port_tty_hangup [2021-11-19 14:59:41,709 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-19 14:59:41,709 INFO L130 BoogieDeclarations]: Found specification of procedure __cmpxchg_wrong_size [2021-11-19 14:59:41,710 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_intfdata [2021-11-19 14:59:41,710 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_intfdata [2021-11-19 14:59:41,710 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-19 14:59:41,710 INFO L130 BoogieDeclarations]: Found specification of procedure __xchg_wrong_size [2021-11-19 14:59:41,710 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-19 14:59:41,711 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-19 14:59:41,711 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-19 14:59:41,711 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-19 14:59:41,711 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-19 14:59:41,711 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-19 14:59:41,712 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-19 14:59:41,712 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-19 14:59:41,712 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_xfer_int [2021-11-19 14:59:41,712 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_xfer_int [2021-11-19 14:59:41,712 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_cleanup [2021-11-19 14:59:41,713 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_cleanup [2021-11-19 14:59:41,713 INFO L130 BoogieDeclarations]: Found specification of procedure debug_lockdep_rcu_enabled [2021-11-19 14:59:41,713 INFO L138 BoogieDeclarations]: Found implementation of procedure debug_lockdep_rcu_enabled [2021-11-19 14:59:41,713 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2021-11-19 14:59:41,713 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2021-11-19 14:59:41,714 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock [2021-11-19 14:59:41,714 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock [2021-11-19 14:59:41,714 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-19 14:59:41,714 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-19 14:59:41,714 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_maxp [2021-11-19 14:59:41,715 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_maxp [2021-11-19 14:59:41,715 INFO L130 BoogieDeclarations]: Found specification of procedure usb_autopm_get_interface [2021-11-19 14:59:41,715 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_autopm_get_interface [2021-11-19 14:59:41,715 INFO L130 BoogieDeclarations]: Found specification of procedure acm_write_buffers_free [2021-11-19 14:59:41,716 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_write_buffers_free [2021-11-19 14:59:41,716 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-11-19 14:59:41,716 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-11-19 14:59:41,717 INFO L130 BoogieDeclarations]: Found specification of procedure usb_fill_bulk_urb [2021-11-19 14:59:41,717 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_fill_bulk_urb [2021-11-19 14:59:41,717 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-19 14:59:41,717 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-19 14:59:41,718 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_dir_in [2021-11-19 14:59:41,718 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_dir_in [2021-11-19 14:59:41,718 INFO L130 BoogieDeclarations]: Found specification of procedure device_create_file [2021-11-19 14:59:41,718 INFO L138 BoogieDeclarations]: Found implementation of procedure device_create_file [2021-11-19 14:59:41,719 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-19 14:59:41,719 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-19 14:59:41,719 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-19 14:59:41,719 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-19 14:59:41,720 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-11-19 14:59:41,721 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-11-19 14:59:41,721 INFO L130 BoogieDeclarations]: Found specification of procedure tty_port_put [2021-11-19 14:59:41,722 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_port_put [2021-11-19 14:59:41,722 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_chars_in_buffer [2021-11-19 14:59:41,722 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_chars_in_buffer [2021-11-19 14:59:41,722 INFO L130 BoogieDeclarations]: Found specification of procedure acm_resume [2021-11-19 14:59:41,722 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_resume [2021-11-19 14:59:41,723 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 14:59:41,723 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2021-11-19 14:59:41,723 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2021-11-19 14:59:41,724 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-19 14:59:41,724 INFO L130 BoogieDeclarations]: Found specification of procedure acm_ctrl_msg [2021-11-19 14:59:41,725 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_ctrl_msg [2021-11-19 14:59:41,725 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_coherent [2021-11-19 14:59:41,725 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_coherent [2021-11-19 14:59:41,726 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-19 14:59:41,726 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_hangup [2021-11-19 14:59:41,727 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_hangup [2021-11-19 14:59:41,727 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ifnum_to_if [2021-11-19 14:59:41,727 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ifnum_to_if [2021-11-19 14:59:41,727 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock [2021-11-19 14:59:41,728 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock [2021-11-19 14:59:41,728 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-11-19 14:59:41,728 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-11-19 14:59:41,728 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-11-19 14:59:41,728 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-11-19 14:59:41,729 INFO L130 BoogieDeclarations]: Found specification of procedure acm_softint [2021-11-19 14:59:41,729 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_softint [2021-11-19 14:59:41,729 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-19 14:59:41,729 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-19 14:59:41,729 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-19 14:59:41,729 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 14:59:41,730 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-19 14:59:41,731 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-19 14:59:41,731 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2021-11-19 14:59:41,731 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 14:59:41,731 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-19 14:59:41,732 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-19 14:59:41,732 INFO L130 BoogieDeclarations]: Found specification of procedure __might_fault [2021-11-19 14:59:41,733 INFO L138 BoogieDeclarations]: Found implementation of procedure __might_fault [2021-11-19 14:59:41,733 INFO L130 BoogieDeclarations]: Found specification of procedure put_tty_driver [2021-11-19 14:59:41,734 INFO L138 BoogieDeclarations]: Found implementation of procedure put_tty_driver [2021-11-19 14:59:41,734 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-11-19 14:59:41,735 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-11-19 14:59:41,735 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2021-11-19 14:59:41,735 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2021-11-19 14:59:41,736 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_tiocmget [2021-11-19 14:59:41,736 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_tiocmget [2021-11-19 14:59:41,736 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_intfdata [2021-11-19 14:59:41,736 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_intfdata [2021-11-19 14:59:41,736 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_set_termios [2021-11-19 14:59:41,736 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_set_termios [2021-11-19 14:59:41,737 INFO L130 BoogieDeclarations]: Found specification of procedure usb_clear_halt [2021-11-19 14:59:41,737 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_clear_halt [2021-11-19 14:59:41,737 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_from_anchor [2021-11-19 14:59:41,738 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_from_anchor [2021-11-19 14:59:41,738 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_break_ctl [2021-11-19 14:59:41,738 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_break_ctl [2021-11-19 14:59:41,738 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2021-11-19 14:59:41,739 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2021-11-19 14:59:41,739 INFO L130 BoogieDeclarations]: Found specification of procedure usb_autopm_put_interface [2021-11-19 14:59:41,740 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_autopm_put_interface [2021-11-19 14:59:41,743 INFO L130 BoogieDeclarations]: Found specification of procedure acm_start_wb [2021-11-19 14:59:41,744 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_start_wb [2021-11-19 14:59:41,744 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_xfer_bulk [2021-11-19 14:59:41,744 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_xfer_bulk [2021-11-19 14:59:41,745 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-19 14:59:41,747 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-19 14:59:41,747 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2021-11-19 14:59:41,747 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2021-11-19 14:59:41,748 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_throttle [2021-11-19 14:59:41,754 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_throttle [2021-11-19 14:59:41,754 INFO L130 BoogieDeclarations]: Found specification of procedure acm_wb_is_avail [2021-11-19 14:59:41,754 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_wb_is_avail [2021-11-19 14:59:41,755 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2021-11-19 14:59:41,755 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2021-11-19 14:59:41,755 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2021-11-19 14:59:41,755 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2021-11-19 14:59:41,755 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_flags [2021-11-19 14:59:41,756 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_flags [2021-11-19 14:59:41,756 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_write_room [2021-11-19 14:59:41,756 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_write_room [2021-11-19 14:59:41,756 INFO L130 BoogieDeclarations]: Found specification of procedure acm_submit_read_urb [2021-11-19 14:59:41,756 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_submit_read_urb [2021-11-19 14:59:41,756 INFO L130 BoogieDeclarations]: Found specification of procedure usb_fill_int_urb [2021-11-19 14:59:41,757 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_fill_int_urb [2021-11-19 14:59:41,757 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-19 14:59:41,757 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-19 14:59:41,757 INFO L130 BoogieDeclarations]: Found specification of procedure acm_set_control [2021-11-19 14:59:41,757 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_set_control [2021-11-19 14:59:41,757 INFO L130 BoogieDeclarations]: Found specification of procedure copy_to_user [2021-11-19 14:59:41,758 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_to_user [2021-11-19 14:59:41,758 INFO L130 BoogieDeclarations]: Found specification of procedure acm_write_done [2021-11-19 14:59:41,758 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_write_done [2021-11-19 14:59:41,758 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_ioctl [2021-11-19 14:59:41,758 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_ioctl [2021-11-19 14:59:41,758 INFO L130 BoogieDeclarations]: Found specification of procedure acm_release_minor [2021-11-19 14:59:41,759 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_release_minor [2021-11-19 14:59:41,759 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-19 14:59:41,759 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2021-11-19 14:59:41,759 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-19 14:59:41,759 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2021-11-19 14:59:41,759 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irq [2021-11-19 14:59:41,760 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irq [2021-11-19 14:59:41,760 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-19 14:59:41,760 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-19 14:59:41,760 INFO L130 BoogieDeclarations]: Found specification of procedure __read_once_size [2021-11-19 14:59:41,760 INFO L138 BoogieDeclarations]: Found implementation of procedure __read_once_size [2021-11-19 14:59:41,760 INFO L130 BoogieDeclarations]: Found specification of procedure usb_autopm_put_interface_async [2021-11-19 14:59:41,761 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_autopm_put_interface_async [2021-11-19 14:59:41,761 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_unthrottle [2021-11-19 14:59:41,761 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_unthrottle [2021-11-19 14:59:41,761 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2021-11-19 14:59:41,761 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2021-11-19 14:59:41,761 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-19 14:59:41,762 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2021-11-19 14:59:41,762 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2021-11-19 14:59:41,762 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 14:59:41,762 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-19 14:59:41,762 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-19 14:59:41,763 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2021-11-19 14:59:41,763 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2021-11-19 14:59:41,763 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-19 14:59:41,763 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_irq [2021-11-19 14:59:41,763 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_irq [2021-11-19 14:59:41,763 INFO L130 BoogieDeclarations]: Found specification of procedure acm_port_dtr_rts [2021-11-19 14:59:41,764 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_port_dtr_rts [2021-11-19 14:59:41,764 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2021-11-19 14:59:41,764 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2021-11-19 14:59:41,764 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_urb [2021-11-19 14:59:41,764 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_urb [2021-11-19 14:59:41,764 INFO L130 BoogieDeclarations]: Found specification of procedure acm_read_buffers_free [2021-11-19 14:59:41,765 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_read_buffers_free [2021-11-19 14:59:41,765 INFO L130 BoogieDeclarations]: Found specification of procedure acm_submit_read_urbs [2021-11-19 14:59:41,765 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_submit_read_urbs [2021-11-19 14:59:41,765 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_install [2021-11-19 14:59:41,765 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_install [2021-11-19 14:59:41,765 INFO L130 BoogieDeclarations]: Found specification of procedure stop_data_traffic [2021-11-19 14:59:41,766 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_data_traffic [2021-11-19 14:59:41,766 INFO L130 BoogieDeclarations]: Found specification of procedure __init_waitqueue_head [2021-11-19 14:59:41,766 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_waitqueue_head [2021-11-19 14:59:41,766 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2021-11-19 14:59:41,766 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2021-11-19 14:59:41,766 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-19 14:59:41,767 INFO L130 BoogieDeclarations]: Found specification of procedure interface_to_usbdev [2021-11-19 14:59:41,767 INFO L138 BoogieDeclarations]: Found implementation of procedure interface_to_usbdev [2021-11-19 14:59:41,767 INFO L130 BoogieDeclarations]: Found specification of procedure device_remove_file [2021-11-19 14:59:41,767 INFO L138 BoogieDeclarations]: Found implementation of procedure device_remove_file [2021-11-19 14:59:41,767 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_tiocmset [2021-11-19 14:59:41,767 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_tiocmset [2021-11-19 14:59:41,768 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 14:59:41,768 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 14:59:41,768 INFO L130 BoogieDeclarations]: Found specification of procedure tty_unregister_driver [2021-11-19 14:59:41,768 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_unregister_driver [2021-11-19 14:59:41,768 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2021-11-19 14:59:41,768 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2021-11-19 14:59:42,691 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 14:59:42,696 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 14:59:43,501 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-19 15:00:42,143 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 15:00:42,177 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 15:00:42,178 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-19 15:00:42,185 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 03:00:42 BoogieIcfgContainer [2021-11-19 15:00:42,185 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 15:00:42,188 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 15:00:42,189 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 15:00:42,192 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 15:00:42,192 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 02:59:36" (1/3) ... [2021-11-19 15:00:42,193 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d690d00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 03:00:42, skipping insertion in model container [2021-11-19 15:00:42,194 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:59:40" (2/3) ... [2021-11-19 15:00:42,194 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d690d00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 03:00:42, skipping insertion in model container [2021-11-19 15:00:42,194 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 03:00:42" (3/3) ... [2021-11-19 15:00:42,199 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-43_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i [2021-11-19 15:00:42,217 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 15:00:42,217 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 15:00:42,301 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 15:00:42,308 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-19 15:00:42,308 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 15:00:42,372 INFO L276 IsEmpty]: Start isEmpty. Operand has 1522 states, 1092 states have (on average 1.3424908424908424) internal successors, (1466), 1108 states have internal predecessors, (1466), 343 states have call successors, (343), 86 states have call predecessors, (343), 85 states have return successors, (334), 334 states have call predecessors, (334), 334 states have call successors, (334) [2021-11-19 15:00:42,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2021-11-19 15:00:42,420 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:00:42,422 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:00:42,423 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:00:42,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:00:42,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1379845110, now seen corresponding path program 1 times [2021-11-19 15:00:42,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:00:42,459 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [23248366] [2021-11-19 15:00:42,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:00:42,462 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:00:42,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:00:42,474 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:00:42,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 15:00:46,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:00:46,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 4607 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-19 15:00:46,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:00:49,312 INFO L134 CoverageAnalysis]: Checked inductivity of 1526 backedges. 497 proven. 0 refuted. 0 times theorem prover too weak. 1029 trivial. 0 not checked. [2021-11-19 15:00:49,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:00:51,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1526 backedges. 50 proven. 15 refuted. 0 times theorem prover too weak. 1461 trivial. 0 not checked. [2021-11-19 15:00:51,110 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:00:51,110 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [23248366] [2021-11-19 15:00:51,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [23248366] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:00:51,111 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:00:51,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2021-11-19 15:00:51,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295597429] [2021-11-19 15:00:51,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:00:51,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-19 15:00:51,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:00:51,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-19 15:00:51,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 15:00:51,164 INFO L87 Difference]: Start difference. First operand has 1522 states, 1092 states have (on average 1.3424908424908424) internal successors, (1466), 1108 states have internal predecessors, (1466), 343 states have call successors, (343), 86 states have call predecessors, (343), 85 states have return successors, (334), 334 states have call predecessors, (334), 334 states have call successors, (334) Second operand has 2 states, 2 states have (on average 39.5) internal successors, (79), 2 states have internal predecessors, (79), 2 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2021-11-19 15:00:51,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:00:51,434 INFO L93 Difference]: Finished difference Result 3039 states and 4351 transitions. [2021-11-19 15:00:51,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 15:00:51,440 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 39.5) internal successors, (79), 2 states have internal predecessors, (79), 2 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) Word has length 354 [2021-11-19 15:00:51,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:00:51,490 INFO L225 Difference]: With dead ends: 3039 [2021-11-19 15:00:51,491 INFO L226 Difference]: Without dead ends: 1499 [2021-11-19 15:00:51,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 706 GetRequests, 706 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 15:00:51,528 INFO L933 BasicCegarLoop]: 2139 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2139 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 15:00:51,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 2139 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 15:00:51,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1499 states. [2021-11-19 15:00:51,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1499 to 1499. [2021-11-19 15:00:51,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1499 states, 1082 states have (on average 1.3336414048059149) internal successors, (1443), 1087 states have internal predecessors, (1443), 332 states have call successors, (332), 85 states have call predecessors, (332), 84 states have return successors, (331), 331 states have call predecessors, (331), 331 states have call successors, (331) [2021-11-19 15:00:51,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1499 states to 1499 states and 2106 transitions. [2021-11-19 15:00:51,818 INFO L78 Accepts]: Start accepts. Automaton has 1499 states and 2106 transitions. Word has length 354 [2021-11-19 15:00:51,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:00:51,820 INFO L470 AbstractCegarLoop]: Abstraction has 1499 states and 2106 transitions. [2021-11-19 15:00:51,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 39.5) internal successors, (79), 2 states have internal predecessors, (79), 2 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2021-11-19 15:00:51,821 INFO L276 IsEmpty]: Start isEmpty. Operand 1499 states and 2106 transitions. [2021-11-19 15:00:51,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2021-11-19 15:00:51,845 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:00:51,846 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:00:51,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 15:00:52,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:00:52,048 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:00:52,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:00:52,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1666470674, now seen corresponding path program 1 times [2021-11-19 15:00:52,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:00:52,065 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1854164814] [2021-11-19 15:00:52,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:00:52,067 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:00:52,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:00:52,068 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:00:52,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 15:00:57,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:00:57,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 4607 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 15:00:57,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:00:59,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1526 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 1463 trivial. 0 not checked. [2021-11-19 15:00:59,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:01:02,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1526 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 1477 trivial. 0 not checked. [2021-11-19 15:01:02,480 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:01:02,480 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1854164814] [2021-11-19 15:01:02,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1854164814] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:01:02,480 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:01:02,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 9 [2021-11-19 15:01:02,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302448980] [2021-11-19 15:01:02,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:01:02,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 15:01:02,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:01:02,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 15:01:02,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-19 15:01:02,487 INFO L87 Difference]: Start difference. First operand 1499 states and 2106 transitions. Second operand has 6 states, 5 states have (on average 15.0) internal successors, (75), 6 states have internal predecessors, (75), 3 states have call successors, (32), 2 states have call predecessors, (32), 4 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) [2021-11-19 15:01:03,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:01:03,867 INFO L93 Difference]: Finished difference Result 2972 states and 4184 transitions. [2021-11-19 15:01:03,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 15:01:03,868 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 15.0) internal successors, (75), 6 states have internal predecessors, (75), 3 states have call successors, (32), 2 states have call predecessors, (32), 4 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) Word has length 354 [2021-11-19 15:01:03,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:01:03,887 INFO L225 Difference]: With dead ends: 2972 [2021-11-19 15:01:03,888 INFO L226 Difference]: Without dead ends: 1500 [2021-11-19 15:01:03,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 708 GetRequests, 699 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-11-19 15:01:03,897 INFO L933 BasicCegarLoop]: 2095 mSDtfsCounter, 6 mSDsluCounter, 8355 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 10450 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 15:01:03,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 10450 Invalid, 85 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [10 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-19 15:01:03,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1500 states. [2021-11-19 15:01:03,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1500 to 1500. [2021-11-19 15:01:03,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1500 states, 1083 states have (on average 1.3333333333333333) internal successors, (1444), 1088 states have internal predecessors, (1444), 332 states have call successors, (332), 85 states have call predecessors, (332), 84 states have return successors, (331), 331 states have call predecessors, (331), 331 states have call successors, (331) [2021-11-19 15:01:03,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1500 states to 1500 states and 2107 transitions. [2021-11-19 15:01:04,000 INFO L78 Accepts]: Start accepts. Automaton has 1500 states and 2107 transitions. Word has length 354 [2021-11-19 15:01:04,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:01:04,005 INFO L470 AbstractCegarLoop]: Abstraction has 1500 states and 2107 transitions. [2021-11-19 15:01:04,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 15.0) internal successors, (75), 6 states have internal predecessors, (75), 3 states have call successors, (32), 2 states have call predecessors, (32), 4 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) [2021-11-19 15:01:04,006 INFO L276 IsEmpty]: Start isEmpty. Operand 1500 states and 2107 transitions. [2021-11-19 15:01:04,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2021-11-19 15:01:04,019 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:01:04,020 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:01:04,110 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 15:01:04,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:01:04,234 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:01:04,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:01:04,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1573672362, now seen corresponding path program 1 times [2021-11-19 15:01:04,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:01:04,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [162243726] [2021-11-19 15:01:04,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:01:04,246 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:01:04,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:01:04,247 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:01:04,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 15:01:08,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:01:09,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 4647 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 15:01:09,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:01:11,560 INFO L134 CoverageAnalysis]: Checked inductivity of 1618 backedges. 84 proven. 1 refuted. 0 times theorem prover too weak. 1533 trivial. 0 not checked. [2021-11-19 15:01:11,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:01:14,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1618 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 1547 trivial. 0 not checked. [2021-11-19 15:01:14,612 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:01:14,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [162243726] [2021-11-19 15:01:14,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [162243726] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:01:14,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1539471617] [2021-11-19 15:01:14,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:01:14,613 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:01:14,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:01:14,623 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:01:14,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-11-19 15:01:17,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:01:18,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 4647 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 15:01:18,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:01:20,008 INFO L134 CoverageAnalysis]: Checked inductivity of 1618 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1618 trivial. 0 not checked. [2021-11-19 15:01:20,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:01:21,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1618 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1618 trivial. 0 not checked. [2021-11-19 15:01:21,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1539471617] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:01:21,066 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 15:01:21,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7, 7] total 12 [2021-11-19 15:01:21,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925788616] [2021-11-19 15:01:21,067 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:01:21,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 15:01:21,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:01:21,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 15:01:21,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-19 15:01:21,073 INFO L87 Difference]: Start difference. First operand 1500 states and 2107 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2021-11-19 15:01:23,068 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:01:24,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:01:24,179 INFO L93 Difference]: Finished difference Result 4275 states and 5990 transitions. [2021-11-19 15:01:24,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 15:01:24,180 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) Word has length 362 [2021-11-19 15:01:24,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:01:24,206 INFO L225 Difference]: With dead ends: 4275 [2021-11-19 15:01:24,206 INFO L226 Difference]: Without dead ends: 2828 [2021-11-19 15:01:24,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1444 GetRequests, 1434 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-19 15:01:24,217 INFO L933 BasicCegarLoop]: 2386 mSDtfsCounter, 1914 mSDsluCounter, 2010 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1914 SdHoareTripleChecker+Valid, 4396 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-11-19 15:01:24,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1914 Valid, 4396 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-11-19 15:01:24,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2828 states. [2021-11-19 15:01:24,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2828 to 2823. [2021-11-19 15:01:24,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2823 states, 2049 states have (on average 1.3372376769155685) internal successors, (2740), 2060 states have internal predecessors, (2740), 607 states have call successors, (607), 167 states have call predecessors, (607), 166 states have return successors, (606), 605 states have call predecessors, (606), 606 states have call successors, (606) [2021-11-19 15:01:24,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2823 states to 2823 states and 3953 transitions. [2021-11-19 15:01:24,521 INFO L78 Accepts]: Start accepts. Automaton has 2823 states and 3953 transitions. Word has length 362 [2021-11-19 15:01:24,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:01:24,525 INFO L470 AbstractCegarLoop]: Abstraction has 2823 states and 3953 transitions. [2021-11-19 15:01:24,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2021-11-19 15:01:24,526 INFO L276 IsEmpty]: Start isEmpty. Operand 2823 states and 3953 transitions. [2021-11-19 15:01:24,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2021-11-19 15:01:24,538 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:01:24,539 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:01:24,569 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-11-19 15:01:24,846 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 15:01:24,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:01:24,963 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:01:24,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:01:24,964 INFO L85 PathProgramCache]: Analyzing trace with hash 400458956, now seen corresponding path program 1 times [2021-11-19 15:01:24,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:01:24,972 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1257734171] [2021-11-19 15:01:24,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:01:24,973 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:01:24,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:01:24,975 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:01:25,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 15:01:29,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:01:29,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 4716 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 15:01:29,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:01:32,058 INFO L134 CoverageAnalysis]: Checked inductivity of 1618 backedges. 84 proven. 1 refuted. 0 times theorem prover too weak. 1533 trivial. 0 not checked. [2021-11-19 15:01:32,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:01:35,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1618 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 1547 trivial. 0 not checked. [2021-11-19 15:01:35,319 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:01:35,319 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1257734171] [2021-11-19 15:01:35,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1257734171] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:01:35,320 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [180078173] [2021-11-19 15:01:35,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:01:35,321 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:01:35,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:01:35,322 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:01:35,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-19 15:01:38,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:01:39,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 4716 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 15:01:40,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:01:41,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1618 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1618 trivial. 0 not checked. [2021-11-19 15:01:41,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:01:42,166 INFO L134 CoverageAnalysis]: Checked inductivity of 1618 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1618 trivial. 0 not checked. [2021-11-19 15:01:42,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [180078173] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:01:42,166 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 15:01:42,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7, 7] total 12 [2021-11-19 15:01:42,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477152936] [2021-11-19 15:01:42,167 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:01:42,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 15:01:42,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:01:42,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 15:01:42,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-19 15:01:42,169 INFO L87 Difference]: Start difference. First operand 2823 states and 3953 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-19 15:01:44,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:01:44,122 INFO L93 Difference]: Finished difference Result 7155 states and 9994 transitions. [2021-11-19 15:01:44,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 15:01:44,123 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 362 [2021-11-19 15:01:44,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:01:44,166 INFO L225 Difference]: With dead ends: 7155 [2021-11-19 15:01:44,166 INFO L226 Difference]: Without dead ends: 4385 [2021-11-19 15:01:44,179 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1444 GetRequests, 1434 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-19 15:01:44,181 INFO L933 BasicCegarLoop]: 2450 mSDtfsCounter, 1249 mSDsluCounter, 2010 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1249 SdHoareTripleChecker+Valid, 4460 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-19 15:01:44,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1249 Valid, 4460 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-19 15:01:44,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4385 states. [2021-11-19 15:01:44,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4385 to 4380. [2021-11-19 15:01:44,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4380 states, 3221 states have (on average 1.3464762496119218) internal successors, (4337), 3237 states have internal predecessors, (4337), 887 states have call successors, (887), 272 states have call predecessors, (887), 271 states have return successors, (886), 884 states have call predecessors, (886), 886 states have call successors, (886) [2021-11-19 15:01:44,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4380 states to 4380 states and 6110 transitions. [2021-11-19 15:01:44,410 INFO L78 Accepts]: Start accepts. Automaton has 4380 states and 6110 transitions. Word has length 362 [2021-11-19 15:01:44,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:01:44,411 INFO L470 AbstractCegarLoop]: Abstraction has 4380 states and 6110 transitions. [2021-11-19 15:01:44,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-19 15:01:44,412 INFO L276 IsEmpty]: Start isEmpty. Operand 4380 states and 6110 transitions. [2021-11-19 15:01:44,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2021-11-19 15:01:44,422 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:01:44,422 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:01:44,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 15:01:44,670 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-11-19 15:01:44,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 15:01:44,843 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:01:44,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:01:44,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1608125497, now seen corresponding path program 1 times [2021-11-19 15:01:44,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:01:44,850 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [384649181] [2021-11-19 15:01:44,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:01:44,851 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:01:44,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:01:44,853 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:01:44,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 15:01:49,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:01:49,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 4667 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 15:01:49,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:01:51,436 INFO L134 CoverageAnalysis]: Checked inductivity of 1618 backedges. 84 proven. 1 refuted. 0 times theorem prover too weak. 1533 trivial. 0 not checked. [2021-11-19 15:01:51,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:01:54,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1618 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 1547 trivial. 0 not checked. [2021-11-19 15:01:54,344 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:01:54,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [384649181] [2021-11-19 15:01:54,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [384649181] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:01:54,345 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2028264546] [2021-11-19 15:01:54,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:01:54,345 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:01:54,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:01:54,349 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:01:54,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-19 15:01:58,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:01:59,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 4667 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 15:01:59,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:02:00,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1618 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1618 trivial. 0 not checked. [2021-11-19 15:02:00,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:02:02,266 INFO L134 CoverageAnalysis]: Checked inductivity of 1618 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1618 trivial. 0 not checked. [2021-11-19 15:02:02,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2028264546] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:02:02,267 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 15:02:02,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7, 7] total 12 [2021-11-19 15:02:02,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628097636] [2021-11-19 15:02:02,269 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:02:02,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 15:02:02,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:02:02,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 15:02:02,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-19 15:02:02,271 INFO L87 Difference]: Start difference. First operand 4380 states and 6110 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 2 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-19 15:02:05,055 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:02:06,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:02:06,562 INFO L93 Difference]: Finished difference Result 11085 states and 15382 transitions. [2021-11-19 15:02:06,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 15:02:06,563 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 2 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 362 [2021-11-19 15:02:06,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:02:06,617 INFO L225 Difference]: With dead ends: 11085 [2021-11-19 15:02:06,617 INFO L226 Difference]: Without dead ends: 6758 [2021-11-19 15:02:06,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1444 GetRequests, 1434 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-19 15:02:06,638 INFO L933 BasicCegarLoop]: 2558 mSDtfsCounter, 1461 mSDsluCounter, 1947 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1461 SdHoareTripleChecker+Valid, 4505 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:02:06,639 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1461 Valid, 4505 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2021-11-19 15:02:06,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6758 states. [2021-11-19 15:02:06,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6758 to 6755. [2021-11-19 15:02:06,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6755 states, 4950 states have (on average 1.3357575757575757) internal successors, (6612), 4974 states have internal predecessors, (6612), 1365 states have call successors, (1365), 440 states have call predecessors, (1365), 439 states have return successors, (1364), 1362 states have call predecessors, (1364), 1364 states have call successors, (1364) [2021-11-19 15:02:06,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6755 states to 6755 states and 9341 transitions. [2021-11-19 15:02:06,981 INFO L78 Accepts]: Start accepts. Automaton has 6755 states and 9341 transitions. Word has length 362 [2021-11-19 15:02:06,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:02:06,982 INFO L470 AbstractCegarLoop]: Abstraction has 6755 states and 9341 transitions. [2021-11-19 15:02:06,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 2 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-19 15:02:06,984 INFO L276 IsEmpty]: Start isEmpty. Operand 6755 states and 9341 transitions. [2021-11-19 15:02:06,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 421 [2021-11-19 15:02:06,994 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:02:06,995 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 8, 8, 8, 8, 8, 8, 8, 8, 8, 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] [2021-11-19 15:02:07,067 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-19 15:02:07,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-11-19 15:02:07,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 15:02:07,418 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:02:07,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:02:07,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1699374415, now seen corresponding path program 1 times [2021-11-19 15:02:07,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:02:07,425 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [331958576] [2021-11-19 15:02:07,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:02:07,425 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:02:07,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:02:07,426 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:02:07,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 15:02:12,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:02:12,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 4953 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 15:02:12,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:02:15,476 INFO L134 CoverageAnalysis]: Checked inductivity of 1817 backedges. 280 proven. 1 refuted. 0 times theorem prover too weak. 1536 trivial. 0 not checked. [2021-11-19 15:02:15,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:02:18,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1817 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 1746 trivial. 0 not checked. [2021-11-19 15:02:18,820 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:02:18,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [331958576] [2021-11-19 15:02:18,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [331958576] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:02:18,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2107407860] [2021-11-19 15:02:18,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:02:18,822 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:02:18,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:02:18,847 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:02:18,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-19 15:02:22,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:02:24,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 4953 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 15:02:24,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:02:25,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1817 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1814 trivial. 0 not checked. [2021-11-19 15:02:25,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:02:26,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1817 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1814 trivial. 0 not checked. [2021-11-19 15:02:26,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2107407860] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:02:26,478 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 15:02:26,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7, 7] total 12 [2021-11-19 15:02:26,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758101904] [2021-11-19 15:02:26,479 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:02:26,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 15:02:26,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:02:26,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 15:02:26,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-19 15:02:26,481 INFO L87 Difference]: Start difference. First operand 6755 states and 9341 transitions. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2021-11-19 15:02:27,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:02:27,612 INFO L93 Difference]: Finished difference Result 13442 states and 18592 transitions. [2021-11-19 15:02:27,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 15:02:27,613 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) Word has length 420 [2021-11-19 15:02:27,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:02:27,682 INFO L225 Difference]: With dead ends: 13442 [2021-11-19 15:02:27,682 INFO L226 Difference]: Without dead ends: 6755 [2021-11-19 15:02:27,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1676 GetRequests, 1666 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-19 15:02:27,715 INFO L933 BasicCegarLoop]: 2104 mSDtfsCounter, 2102 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2102 SdHoareTripleChecker+Valid, 2104 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 15:02:27,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2102 Valid, 2104 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 15:02:27,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6755 states. [2021-11-19 15:02:28,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6755 to 6701. [2021-11-19 15:02:28,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6701 states, 4910 states have (on average 1.3364562118126273) internal successors, (6562), 4936 states have internal predecessors, (6562), 1357 states have call successors, (1357), 434 states have call predecessors, (1357), 433 states have return successors, (1356), 1352 states have call predecessors, (1356), 1356 states have call successors, (1356) [2021-11-19 15:02:28,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6701 states to 6701 states and 9275 transitions. [2021-11-19 15:02:28,152 INFO L78 Accepts]: Start accepts. Automaton has 6701 states and 9275 transitions. Word has length 420 [2021-11-19 15:02:28,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:02:28,155 INFO L470 AbstractCegarLoop]: Abstraction has 6701 states and 9275 transitions. [2021-11-19 15:02:28,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 2 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2021-11-19 15:02:28,155 INFO L276 IsEmpty]: Start isEmpty. Operand 6701 states and 9275 transitions. [2021-11-19 15:02:28,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 438 [2021-11-19 15:02:28,173 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:02:28,173 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:02:28,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-19 15:02:28,472 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-19 15:02:28,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:02:28,600 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:02:28,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:02:28,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1283468776, now seen corresponding path program 1 times [2021-11-19 15:02:28,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:02:28,607 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1784220953] [2021-11-19 15:02:28,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:02:28,607 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:02:28,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:02:28,608 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:02:28,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 15:02:32,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:02:33,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 4837 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 15:02:33,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:02:35,511 INFO L134 CoverageAnalysis]: Checked inductivity of 2035 backedges. 476 proven. 1 refuted. 0 times theorem prover too weak. 1558 trivial. 0 not checked. [2021-11-19 15:02:35,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:02:38,184 INFO L134 CoverageAnalysis]: Checked inductivity of 2035 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 1964 trivial. 0 not checked. [2021-11-19 15:02:38,184 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:02:38,184 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1784220953] [2021-11-19 15:02:38,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1784220953] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:02:38,184 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1028661735] [2021-11-19 15:02:38,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:02:38,184 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:02:38,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:02:38,185 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:02:38,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-19 15:02:41,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:02:42,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 4837 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 15:02:42,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:02:50,054 INFO L134 CoverageAnalysis]: Checked inductivity of 2035 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2035 trivial. 0 not checked. [2021-11-19 15:02:50,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:02:52,861 INFO L134 CoverageAnalysis]: Checked inductivity of 2035 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2035 trivial. 0 not checked. [2021-11-19 15:02:52,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1028661735] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:02:52,861 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 15:02:52,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [7, 7] total 12 [2021-11-19 15:02:52,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275471685] [2021-11-19 15:02:52,862 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:02:52,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 15:02:52,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:02:52,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 15:02:52,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-19 15:02:52,864 INFO L87 Difference]: Start difference. First operand 6701 states and 9275 transitions. Second operand has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 3 states have call successors, (72), 3 states have call predecessors, (72), 2 states have return successors, (70), 2 states have call predecessors, (70), 2 states have call successors, (70) [2021-11-19 15:02:53,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:02:53,136 INFO L93 Difference]: Finished difference Result 6928 states and 9517 transitions. [2021-11-19 15:02:53,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 15:02:53,137 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 3 states have call successors, (72), 3 states have call predecessors, (72), 2 states have return successors, (70), 2 states have call predecessors, (70), 2 states have call successors, (70) Word has length 437 [2021-11-19 15:02:53,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:02:53,220 INFO L225 Difference]: With dead ends: 6928 [2021-11-19 15:02:53,220 INFO L226 Difference]: Without dead ends: 6925 [2021-11-19 15:02:53,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1744 GetRequests, 1734 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-19 15:02:53,227 INFO L933 BasicCegarLoop]: 2123 mSDtfsCounter, 1819 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1819 SdHoareTripleChecker+Valid, 2305 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 15:02:53,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1819 Valid, 2305 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 15:02:53,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6925 states. [2021-11-19 15:02:53,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6925 to 6925. [2021-11-19 15:02:53,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6925 states, 5063 states have (on average 1.3314240568832707) internal successors, (6741), 5089 states have internal predecessors, (6741), 1384 states have call successors, (1384), 478 states have call predecessors, (1384), 477 states have return successors, (1383), 1379 states have call predecessors, (1383), 1383 states have call successors, (1383) [2021-11-19 15:02:53,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6925 states to 6925 states and 9508 transitions. [2021-11-19 15:02:53,741 INFO L78 Accepts]: Start accepts. Automaton has 6925 states and 9508 transitions. Word has length 437 [2021-11-19 15:02:53,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:02:53,742 INFO L470 AbstractCegarLoop]: Abstraction has 6925 states and 9508 transitions. [2021-11-19 15:02:53,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 3 states have call successors, (72), 3 states have call predecessors, (72), 2 states have return successors, (70), 2 states have call predecessors, (70), 2 states have call successors, (70) [2021-11-19 15:02:53,743 INFO L276 IsEmpty]: Start isEmpty. Operand 6925 states and 9508 transitions. [2021-11-19 15:02:53,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 438 [2021-11-19 15:02:53,761 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:02:53,761 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:02:53,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-19 15:02:54,049 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-19 15:02:54,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:02:54,184 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:02:54,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:02:54,185 INFO L85 PathProgramCache]: Analyzing trace with hash -170299339, now seen corresponding path program 1 times [2021-11-19 15:02:54,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:02:54,191 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1343682561] [2021-11-19 15:02:54,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:02:54,192 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:02:54,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:02:54,193 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:02:54,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-19 15:02:59,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:02:59,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 4857 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 15:02:59,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:03:01,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2033 backedges. 476 proven. 1 refuted. 0 times theorem prover too weak. 1556 trivial. 0 not checked. [2021-11-19 15:03:01,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:03:04,401 INFO L134 CoverageAnalysis]: Checked inductivity of 2033 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 1962 trivial. 0 not checked. [2021-11-19 15:03:04,402 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:03:04,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1343682561] [2021-11-19 15:03:04,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1343682561] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:03:04,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1966675567] [2021-11-19 15:03:04,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:03:04,402 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:03:04,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:03:04,403 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:03:04,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-19 15:03:08,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:03:09,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 4857 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 15:03:09,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:03:11,228 INFO L134 CoverageAnalysis]: Checked inductivity of 2033 backedges. 401 proven. 0 refuted. 0 times theorem prover too weak. 1632 trivial. 0 not checked. [2021-11-19 15:03:11,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:03:12,934 INFO L134 CoverageAnalysis]: Checked inductivity of 2033 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2028 trivial. 0 not checked. [2021-11-19 15:03:12,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1966675567] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:03:12,935 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 15:03:12,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [7, 7] total 15 [2021-11-19 15:03:12,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072142440] [2021-11-19 15:03:12,936 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:03:12,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 15:03:12,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:03:12,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 15:03:12,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-11-19 15:03:12,940 INFO L87 Difference]: Start difference. First operand 6925 states and 9508 transitions. Second operand has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 2 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (40), 2 states have call predecessors, (40), 2 states have call successors, (40) [2021-11-19 15:03:15,700 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.76s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:03:16,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:03:16,430 INFO L93 Difference]: Finished difference Result 13790 states and 18934 transitions. [2021-11-19 15:03:16,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 15:03:16,431 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 2 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (40), 2 states have call predecessors, (40), 2 states have call successors, (40) Word has length 437 [2021-11-19 15:03:16,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:03:16,474 INFO L225 Difference]: With dead ends: 13790 [2021-11-19 15:03:16,474 INFO L226 Difference]: Without dead ends: 6925 [2021-11-19 15:03:16,507 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1745 GetRequests, 1731 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-11-19 15:03:16,508 INFO L933 BasicCegarLoop]: 2104 mSDtfsCounter, 1 mSDsluCounter, 6299 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 8403 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-11-19 15:03:16,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 8403 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 1 Unknown, 0 Unchecked, 3.0s Time] [2021-11-19 15:03:16,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6925 states. [2021-11-19 15:03:17,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6925 to 6925. [2021-11-19 15:03:17,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6925 states, 5063 states have (on average 1.3298439660280466) internal successors, (6733), 5089 states have internal predecessors, (6733), 1384 states have call successors, (1384), 478 states have call predecessors, (1384), 477 states have return successors, (1383), 1379 states have call predecessors, (1383), 1383 states have call successors, (1383) [2021-11-19 15:03:17,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6925 states to 6925 states and 9500 transitions. [2021-11-19 15:03:17,072 INFO L78 Accepts]: Start accepts. Automaton has 6925 states and 9500 transitions. Word has length 437 [2021-11-19 15:03:17,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:03:17,073 INFO L470 AbstractCegarLoop]: Abstraction has 6925 states and 9500 transitions. [2021-11-19 15:03:17,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 2 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (40), 2 states have call predecessors, (40), 2 states have call successors, (40) [2021-11-19 15:03:17,074 INFO L276 IsEmpty]: Start isEmpty. Operand 6925 states and 9500 transitions. [2021-11-19 15:03:17,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 446 [2021-11-19 15:03:17,086 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:03:17,087 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 8, 8, 8, 8, 8, 8, 8, 8, 8, 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] [2021-11-19 15:03:17,185 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-19 15:03:17,345 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-19 15:03:17,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 15:03:17,510 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:03:17,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:03:17,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1055378097, now seen corresponding path program 1 times [2021-11-19 15:03:17,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:03:17,522 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [455319250] [2021-11-19 15:03:17,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:03:17,523 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:03:17,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:03:17,524 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:03:17,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-19 15:03:22,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:03:23,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 4946 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 15:03:23,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:03:26,176 INFO L134 CoverageAnalysis]: Checked inductivity of 2033 backedges. 476 proven. 1 refuted. 0 times theorem prover too weak. 1556 trivial. 0 not checked. [2021-11-19 15:03:26,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:03:29,388 INFO L134 CoverageAnalysis]: Checked inductivity of 2033 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 1962 trivial. 0 not checked. [2021-11-19 15:03:29,388 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:03:29,389 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [455319250] [2021-11-19 15:03:29,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [455319250] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:03:29,389 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [569259979] [2021-11-19 15:03:29,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:03:29,389 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:03:29,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:03:29,400 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:03:29,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-19 15:03:32,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:03:33,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 4946 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 15:03:33,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:03:35,537 INFO L134 CoverageAnalysis]: Checked inductivity of 2033 backedges. 401 proven. 0 refuted. 0 times theorem prover too weak. 1632 trivial. 0 not checked. [2021-11-19 15:03:35,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:03:36,669 INFO L134 CoverageAnalysis]: Checked inductivity of 2033 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2028 trivial. 0 not checked. [2021-11-19 15:03:36,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [569259979] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:03:36,669 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 15:03:36,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [7, 7] total 14 [2021-11-19 15:03:36,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008184852] [2021-11-19 15:03:36,670 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:03:36,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 15:03:36,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:03:36,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 15:03:36,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-11-19 15:03:36,672 INFO L87 Difference]: Start difference. First operand 6925 states and 9500 transitions. Second operand has 5 states, 5 states have (on average 26.2) internal successors, (131), 5 states have internal predecessors, (131), 3 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (41), 3 states have call predecessors, (41), 3 states have call successors, (41) [2021-11-19 15:03:39,229 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.55s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:03:40,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:03:40,138 INFO L93 Difference]: Finished difference Result 13753 states and 18876 transitions. [2021-11-19 15:03:40,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 15:03:40,139 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.2) internal successors, (131), 5 states have internal predecessors, (131), 3 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (41), 3 states have call predecessors, (41), 3 states have call successors, (41) Word has length 445 [2021-11-19 15:03:40,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:03:40,174 INFO L225 Difference]: With dead ends: 13753 [2021-11-19 15:03:40,174 INFO L226 Difference]: Without dead ends: 6854 [2021-11-19 15:03:40,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1778 GetRequests, 1764 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-11-19 15:03:40,211 INFO L933 BasicCegarLoop]: 2101 mSDtfsCounter, 5 mSDsluCounter, 6288 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 8389 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-19 15:03:40,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 8389 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 16 Invalid, 1 Unknown, 0 Unchecked, 2.8s Time] [2021-11-19 15:03:40,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6854 states. [2021-11-19 15:03:40,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6854 to 6826. [2021-11-19 15:03:40,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6826 states, 4991 states have (on average 1.3317972350230414) internal successors, (6647), 5020 states have internal predecessors, (6647), 1367 states have call successors, (1367), 468 states have call predecessors, (1367), 467 states have return successors, (1366), 1359 states have call predecessors, (1366), 1366 states have call successors, (1366) [2021-11-19 15:03:40,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6826 states to 6826 states and 9380 transitions. [2021-11-19 15:03:40,579 INFO L78 Accepts]: Start accepts. Automaton has 6826 states and 9380 transitions. Word has length 445 [2021-11-19 15:03:40,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:03:40,580 INFO L470 AbstractCegarLoop]: Abstraction has 6826 states and 9380 transitions. [2021-11-19 15:03:40,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.2) internal successors, (131), 5 states have internal predecessors, (131), 3 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (41), 3 states have call predecessors, (41), 3 states have call successors, (41) [2021-11-19 15:03:40,580 INFO L276 IsEmpty]: Start isEmpty. Operand 6826 states and 9380 transitions. [2021-11-19 15:03:40,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 465 [2021-11-19 15:03:40,600 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:03:40,601 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 8, 8, 8, 8, 8, 8, 8, 8, 8, 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] [2021-11-19 15:03:40,703 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-19 15:03:40,849 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-19 15:03:41,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 15:03:41,027 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:03:41,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:03:41,027 INFO L85 PathProgramCache]: Analyzing trace with hash -594099730, now seen corresponding path program 1 times [2021-11-19 15:03:41,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:03:41,033 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [454463748] [2021-11-19 15:03:41,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:03:41,034 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:03:41,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:03:41,035 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:03:41,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-19 15:03:45,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:03:45,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 4995 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 15:03:45,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:03:48,502 INFO L134 CoverageAnalysis]: Checked inductivity of 2255 backedges. 672 proven. 1 refuted. 0 times theorem prover too weak. 1582 trivial. 0 not checked. [2021-11-19 15:03:48,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:03:51,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2255 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 2184 trivial. 0 not checked. [2021-11-19 15:03:51,162 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:03:51,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [454463748] [2021-11-19 15:03:51,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [454463748] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:03:51,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1833333493] [2021-11-19 15:03:51,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:03:51,162 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:03:51,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:03:51,163 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:03:51,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-19 15:03:54,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:03:55,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 4995 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 15:03:55,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:03:57,303 INFO L134 CoverageAnalysis]: Checked inductivity of 2255 backedges. 595 proven. 0 refuted. 0 times theorem prover too weak. 1660 trivial. 0 not checked. [2021-11-19 15:03:57,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:03:58,628 INFO L134 CoverageAnalysis]: Checked inductivity of 2255 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2252 trivial. 0 not checked. [2021-11-19 15:03:58,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1833333493] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:03:58,628 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 15:03:58,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7, 7] total 13 [2021-11-19 15:03:58,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348472671] [2021-11-19 15:03:58,629 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:03:58,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 15:03:58,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:03:58,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 15:03:58,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-19 15:03:58,631 INFO L87 Difference]: Start difference. First operand 6826 states and 9380 transitions. Second operand has 4 states, 4 states have (on average 40.5) internal successors, (162), 4 states have internal predecessors, (162), 4 states have call successors, (49), 3 states have call predecessors, (49), 3 states have return successors, (46), 4 states have call predecessors, (46), 4 states have call successors, (46) [2021-11-19 15:04:01,147 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 [] [2021-11-19 15:04:07,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:04:07,208 INFO L93 Difference]: Finished difference Result 18410 states and 25218 transitions. [2021-11-19 15:04:07,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 15:04:07,209 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 40.5) internal successors, (162), 4 states have internal predecessors, (162), 4 states have call successors, (49), 3 states have call predecessors, (49), 3 states have return successors, (46), 4 states have call predecessors, (46), 4 states have call successors, (46) Word has length 464 [2021-11-19 15:04:07,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:04:07,254 INFO L225 Difference]: With dead ends: 18410 [2021-11-19 15:04:07,254 INFO L226 Difference]: Without dead ends: 11652 [2021-11-19 15:04:07,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1852 GetRequests, 1841 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-19 15:04:07,272 INFO L933 BasicCegarLoop]: 2718 mSDtfsCounter, 4209 mSDsluCounter, 2377 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 513 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4209 SdHoareTripleChecker+Valid, 5095 SdHoareTripleChecker+Invalid, 971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 513 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:04:07,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4209 Valid, 5095 Invalid, 971 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [513 Valid, 457 Invalid, 1 Unknown, 0 Unchecked, 8.1s Time] [2021-11-19 15:04:07,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11652 states. [2021-11-19 15:04:07,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11652 to 11582. [2021-11-19 15:04:07,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11582 states, 8567 states have (on average 1.3357067818372825) internal successors, (11443), 8612 states have internal predecessors, (11443), 2185 states have call successors, (2185), 830 states have call predecessors, (2185), 829 states have return successors, (2184), 2169 states have call predecessors, (2184), 2184 states have call successors, (2184) [2021-11-19 15:04:07,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11582 states to 11582 states and 15812 transitions. [2021-11-19 15:04:07,784 INFO L78 Accepts]: Start accepts. Automaton has 11582 states and 15812 transitions. Word has length 464 [2021-11-19 15:04:07,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:04:07,785 INFO L470 AbstractCegarLoop]: Abstraction has 11582 states and 15812 transitions. [2021-11-19 15:04:07,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.5) internal successors, (162), 4 states have internal predecessors, (162), 4 states have call successors, (49), 3 states have call predecessors, (49), 3 states have return successors, (46), 4 states have call predecessors, (46), 4 states have call successors, (46) [2021-11-19 15:04:07,785 INFO L276 IsEmpty]: Start isEmpty. Operand 11582 states and 15812 transitions. [2021-11-19 15:04:07,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2021-11-19 15:04:07,798 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:04:07,799 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 8, 8, 8, 8, 8, 8, 8, 8, 8, 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] [2021-11-19 15:04:07,825 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-11-19 15:04:08,109 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-19 15:04:08,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:04:08,225 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:04:08,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:04:08,226 INFO L85 PathProgramCache]: Analyzing trace with hash 442514555, now seen corresponding path program 1 times [2021-11-19 15:04:08,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:04:08,233 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [831823490] [2021-11-19 15:04:08,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:04:08,233 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:04:08,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:04:08,235 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:04:08,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-19 15:04:12,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:04:12,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 5013 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 15:04:12,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:04:15,321 INFO L134 CoverageAnalysis]: Checked inductivity of 2257 backedges. 672 proven. 1 refuted. 0 times theorem prover too weak. 1584 trivial. 0 not checked. [2021-11-19 15:04:15,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:04:18,045 INFO L134 CoverageAnalysis]: Checked inductivity of 2257 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 2186 trivial. 0 not checked. [2021-11-19 15:04:18,045 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:04:18,046 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [831823490] [2021-11-19 15:04:18,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [831823490] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:04:18,046 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1478562274] [2021-11-19 15:04:18,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:04:18,046 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:04:18,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:04:18,047 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:04:18,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-19 15:04:21,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:04:22,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 5013 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 15:04:22,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:04:23,852 INFO L134 CoverageAnalysis]: Checked inductivity of 2257 backedges. 429 proven. 0 refuted. 0 times theorem prover too weak. 1828 trivial. 0 not checked. [2021-11-19 15:04:23,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:04:25,107 INFO L134 CoverageAnalysis]: Checked inductivity of 2257 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2252 trivial. 0 not checked. [2021-11-19 15:04:25,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1478562274] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:04:25,107 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 15:04:25,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7, 7] total 13 [2021-11-19 15:04:25,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910022140] [2021-11-19 15:04:25,108 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:04:25,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 15:04:25,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:04:25,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 15:04:25,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-19 15:04:25,110 INFO L87 Difference]: Start difference. First operand 11582 states and 15812 transitions. Second operand has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 4 states have call successors, (44), 3 states have call predecessors, (44), 3 states have return successors, (41), 4 states have call predecessors, (41), 4 states have call successors, (41) [2021-11-19 15:04:27,604 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:04:35,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:04:35,445 INFO L93 Difference]: Finished difference Result 34074 states and 46676 transitions. [2021-11-19 15:04:35,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 15:04:35,446 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 4 states have call successors, (44), 3 states have call predecessors, (44), 3 states have return successors, (41), 4 states have call predecessors, (41), 4 states have call successors, (41) Word has length 460 [2021-11-19 15:04:35,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:04:35,556 INFO L225 Difference]: With dead ends: 34074 [2021-11-19 15:04:35,556 INFO L226 Difference]: Without dead ends: 22560 [2021-11-19 15:04:35,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1836 GetRequests, 1825 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-19 15:04:35,593 INFO L933 BasicCegarLoop]: 3266 mSDtfsCounter, 4119 mSDsluCounter, 2890 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 526 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4119 SdHoareTripleChecker+Valid, 6156 SdHoareTripleChecker+Invalid, 1135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 526 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.6s IncrementalHoareTripleChecker+Time [2021-11-19 15:04:35,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4119 Valid, 6156 Invalid, 1135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [526 Valid, 608 Invalid, 1 Unknown, 0 Unchecked, 9.6s Time] [2021-11-19 15:04:35,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22560 states. [2021-11-19 15:04:36,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22560 to 22526. [2021-11-19 15:04:36,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22526 states, 16854 states have (on average 1.3343419959653495) internal successors, (22489), 16939 states have internal predecessors, (22489), 4049 states have call successors, (4049), 1623 states have call predecessors, (4049), 1622 states have return successors, (4048), 4017 states have call predecessors, (4048), 4048 states have call successors, (4048) [2021-11-19 15:04:36,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22526 states to 22526 states and 30586 transitions. [2021-11-19 15:04:36,737 INFO L78 Accepts]: Start accepts. Automaton has 22526 states and 30586 transitions. Word has length 460 [2021-11-19 15:04:36,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:04:36,738 INFO L470 AbstractCegarLoop]: Abstraction has 22526 states and 30586 transitions. [2021-11-19 15:04:36,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 4 states have call successors, (44), 3 states have call predecessors, (44), 3 states have return successors, (41), 4 states have call predecessors, (41), 4 states have call successors, (41) [2021-11-19 15:04:36,739 INFO L276 IsEmpty]: Start isEmpty. Operand 22526 states and 30586 transitions. [2021-11-19 15:04:36,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 485 [2021-11-19 15:04:36,771 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:04:36,772 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 8, 8, 8, 8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 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] [2021-11-19 15:04:36,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-19 15:04:37,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-19 15:04:37,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:04:37,198 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:04:37,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:04:37,198 INFO L85 PathProgramCache]: Analyzing trace with hash 797213022, now seen corresponding path program 1 times [2021-11-19 15:04:37,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:04:37,209 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [945129928] [2021-11-19 15:04:37,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:04:37,210 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:04:37,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:04:37,211 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:04:37,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-19 15:04:41,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:04:42,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 5095 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 15:04:42,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:04:44,987 INFO L134 CoverageAnalysis]: Checked inductivity of 2269 backedges. 672 proven. 1 refuted. 0 times theorem prover too weak. 1596 trivial. 0 not checked. [2021-11-19 15:04:44,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:04:48,011 INFO L134 CoverageAnalysis]: Checked inductivity of 2269 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 2198 trivial. 0 not checked. [2021-11-19 15:04:48,011 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:04:48,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [945129928] [2021-11-19 15:04:48,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [945129928] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:04:48,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [110200031] [2021-11-19 15:04:48,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:04:48,012 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:04:48,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:04:48,023 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:04:48,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-19 15:04:51,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:04:52,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 5095 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-19 15:04:52,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:04:55,559 INFO L134 CoverageAnalysis]: Checked inductivity of 2269 backedges. 602 proven. 7 refuted. 0 times theorem prover too weak. 1660 trivial. 0 not checked. [2021-11-19 15:04:55,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:04:57,665 INFO L134 CoverageAnalysis]: Checked inductivity of 2269 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 2259 trivial. 0 not checked. [2021-11-19 15:04:57,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [110200031] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:04:57,665 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-19 15:04:57,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 7, 6] total 17 [2021-11-19 15:04:57,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035619465] [2021-11-19 15:04:57,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:04:57,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 15:04:57,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:04:57,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 15:04:57,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-11-19 15:04:57,669 INFO L87 Difference]: Start difference. First operand 22526 states and 30586 transitions. Second operand has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 2 states have call successors, (38), 2 states have call predecessors, (38), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2021-11-19 15:05:00,622 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 [] [2021-11-19 15:05:01,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:05:01,384 INFO L93 Difference]: Finished difference Result 45104 states and 61243 transitions. [2021-11-19 15:05:01,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 15:05:01,386 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 2 states have call successors, (38), 2 states have call predecessors, (38), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) Word has length 484 [2021-11-19 15:05:01,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:05:01,499 INFO L225 Difference]: With dead ends: 45104 [2021-11-19 15:05:01,499 INFO L226 Difference]: Without dead ends: 22629 [2021-11-19 15:05:01,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1933 GetRequests, 1917 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-11-19 15:05:01,561 INFO L933 BasicCegarLoop]: 2106 mSDtfsCounter, 232 mSDsluCounter, 4112 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 6218 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-11-19 15:05:01,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 6218 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 1 Unknown, 0 Unchecked, 2.9s Time] [2021-11-19 15:05:01,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22629 states. [2021-11-19 15:05:02,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22629 to 22626. [2021-11-19 15:05:02,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22626 states, 16935 states have (on average 1.3342190729258931) internal successors, (22595), 17021 states have internal predecessors, (22595), 4062 states have call successors, (4062), 1629 states have call predecessors, (4062), 1628 states have return successors, (4061), 4029 states have call predecessors, (4061), 4061 states have call successors, (4061) [2021-11-19 15:05:02,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22626 states to 22626 states and 30718 transitions. [2021-11-19 15:05:02,668 INFO L78 Accepts]: Start accepts. Automaton has 22626 states and 30718 transitions. Word has length 484 [2021-11-19 15:05:02,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:05:02,669 INFO L470 AbstractCegarLoop]: Abstraction has 22626 states and 30718 transitions. [2021-11-19 15:05:02,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 2 states have call successors, (38), 2 states have call predecessors, (38), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2021-11-19 15:05:02,669 INFO L276 IsEmpty]: Start isEmpty. Operand 22626 states and 30718 transitions. [2021-11-19 15:05:02,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 485 [2021-11-19 15:05:02,702 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:05:02,702 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 8, 8, 8, 8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 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] [2021-11-19 15:05:02,804 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-19 15:05:02,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-11-19 15:05:03,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 15:05:03,118 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:05:03,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:05:03,119 INFO L85 PathProgramCache]: Analyzing trace with hash 252340448, now seen corresponding path program 1 times [2021-11-19 15:05:03,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:05:03,129 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [911457298] [2021-11-19 15:05:03,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:05:03,129 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:05:03,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:05:03,130 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:05:03,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-19 15:05:07,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:05:08,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 5095 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 15:05:08,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:05:11,812 INFO L134 CoverageAnalysis]: Checked inductivity of 2269 backedges. 672 proven. 1 refuted. 0 times theorem prover too weak. 1596 trivial. 0 not checked. [2021-11-19 15:05:11,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:05:15,735 INFO L134 CoverageAnalysis]: Checked inductivity of 2269 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 2198 trivial. 0 not checked. [2021-11-19 15:05:15,736 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:05:15,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [911457298] [2021-11-19 15:05:15,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [911457298] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:05:15,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1524535555] [2021-11-19 15:05:15,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:05:15,736 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:05:15,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:05:15,737 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:05:15,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-11-19 15:05:19,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:05:20,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 5095 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-19 15:05:20,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:05:26,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2269 backedges. 602 proven. 7 refuted. 0 times theorem prover too weak. 1660 trivial. 0 not checked. [2021-11-19 15:05:26,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:05:31,226 INFO L134 CoverageAnalysis]: Checked inductivity of 2269 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 2257 trivial. 0 not checked. [2021-11-19 15:05:31,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1524535555] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:05:31,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394556508] [2021-11-19 15:05:31,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:05:31,226 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 15:05:31,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 15:05:31,228 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 15:05:31,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-19 15:05:40,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:05:42,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 5095 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-19 15:05:42,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:05:44,626 INFO L134 CoverageAnalysis]: Checked inductivity of 2269 backedges. 602 proven. 0 refuted. 0 times theorem prover too weak. 1667 trivial. 0 not checked. [2021-11-19 15:05:44,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:05:46,767 INFO L134 CoverageAnalysis]: Checked inductivity of 2269 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 2257 trivial. 0 not checked. [2021-11-19 15:05:46,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394556508] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:05:46,767 INFO L186 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2021-11-19 15:05:46,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7, 7, 10, 8, 8] total 25 [2021-11-19 15:05:46,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733309268] [2021-11-19 15:05:46,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:05:46,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 15:05:46,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:05:46,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 15:05:46,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2021-11-19 15:05:46,770 INFO L87 Difference]: Start difference. First operand 22626 states and 30718 transitions. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 7 states have internal predecessors, (143), 3 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (37), 4 states have call predecessors, (37), 3 states have call successors, (37) [2021-11-19 15:05:51,703 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 [] [2021-11-19 15:05:53,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:05:53,270 INFO L93 Difference]: Finished difference Result 45303 states and 61588 transitions. [2021-11-19 15:05:53,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-19 15:05:53,272 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 7 states have internal predecessors, (143), 3 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (37), 4 states have call predecessors, (37), 3 states have call successors, (37) Word has length 484 [2021-11-19 15:05:53,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:05:53,427 INFO L225 Difference]: With dead ends: 45303 [2021-11-19 15:05:53,428 INFO L226 Difference]: Without dead ends: 22705 [2021-11-19 15:05:53,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2905 GetRequests, 2875 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=119, Invalid=873, Unknown=0, NotChecked=0, Total=992 [2021-11-19 15:05:53,473 INFO L933 BasicCegarLoop]: 2100 mSDtfsCounter, 246 mSDsluCounter, 12501 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 14601 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-11-19 15:05:53,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 14601 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 37 Invalid, 1 Unknown, 0 Unchecked, 3.2s Time] [2021-11-19 15:05:53,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22705 states. [2021-11-19 15:05:54,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22705 to 22686. [2021-11-19 15:05:54,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22686 states, 16965 states have (on average 1.3334512231063955) internal successors, (22622), 17081 states have internal predecessors, (22622), 4062 states have call successors, (4062), 1629 states have call predecessors, (4062), 1658 states have return successors, (4191), 4029 states have call predecessors, (4191), 4061 states have call successors, (4191) [2021-11-19 15:05:54,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22686 states to 22686 states and 30875 transitions. [2021-11-19 15:05:54,653 INFO L78 Accepts]: Start accepts. Automaton has 22686 states and 30875 transitions. Word has length 484 [2021-11-19 15:05:54,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:05:54,654 INFO L470 AbstractCegarLoop]: Abstraction has 22686 states and 30875 transitions. [2021-11-19 15:05:54,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 7 states have internal predecessors, (143), 3 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (37), 4 states have call predecessors, (37), 3 states have call successors, (37) [2021-11-19 15:05:54,654 INFO L276 IsEmpty]: Start isEmpty. Operand 22686 states and 30875 transitions. [2021-11-19 15:05:54,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2021-11-19 15:05:54,685 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:05:54,685 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 8, 8, 8, 8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 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] [2021-11-19 15:05:54,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-19 15:05:54,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2021-11-19 15:05:55,310 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forcibly destroying the process [2021-11-19 15:05:55,392 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 137 [2021-11-19 15:05:55,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 15:05:55,392 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:05:55,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:05:55,393 INFO L85 PathProgramCache]: Analyzing trace with hash -83193416, now seen corresponding path program 1 times [2021-11-19 15:05:55,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:05:55,398 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1929965456] [2021-11-19 15:05:55,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:05:55,399 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:05:55,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:05:55,400 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:05:55,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-19 15:05:59,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:06:00,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 5136 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 15:06:00,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:06:04,901 INFO L134 CoverageAnalysis]: Checked inductivity of 2417 backedges. 784 proven. 1 refuted. 0 times theorem prover too weak. 1632 trivial. 0 not checked. [2021-11-19 15:06:04,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:06:09,368 INFO L134 CoverageAnalysis]: Checked inductivity of 2417 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 2346 trivial. 0 not checked. [2021-11-19 15:06:09,369 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:06:09,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1929965456] [2021-11-19 15:06:09,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1929965456] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:06:09,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2047447679] [2021-11-19 15:06:09,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:06:09,369 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:06:09,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:06:09,370 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:06:09,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-11-19 15:06:12,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:06:14,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 5136 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 15:06:14,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:06:15,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2417 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2417 trivial. 0 not checked. [2021-11-19 15:06:15,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:06:17,444 INFO L134 CoverageAnalysis]: Checked inductivity of 2417 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2417 trivial. 0 not checked. [2021-11-19 15:06:17,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2047447679] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:06:17,444 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 15:06:17,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [7, 7] total 17 [2021-11-19 15:06:17,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758731013] [2021-11-19 15:06:17,445 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:06:17,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 15:06:17,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:06:17,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 15:06:17,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-11-19 15:06:17,447 INFO L87 Difference]: Start difference. First operand 22686 states and 30875 transitions. Second operand has 8 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 4 states have call successors, (42), 4 states have call predecessors, (42), 1 states have return successors, (38), 1 states have call predecessors, (38), 1 states have call successors, (38) [2021-11-19 15:06:18,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:06:18,728 INFO L93 Difference]: Finished difference Result 22721 states and 30909 transitions. [2021-11-19 15:06:18,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 15:06:18,729 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 4 states have call successors, (42), 4 states have call predecessors, (42), 1 states have return successors, (38), 1 states have call predecessors, (38), 1 states have call successors, (38) Word has length 504 [2021-11-19 15:06:18,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:06:18,827 INFO L225 Difference]: With dead ends: 22721 [2021-11-19 15:06:18,828 INFO L226 Difference]: Without dead ends: 22718 [2021-11-19 15:06:18,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2013 GetRequests, 1997 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-11-19 15:06:18,842 INFO L933 BasicCegarLoop]: 2088 mSDtfsCounter, 17 mSDsluCounter, 10398 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 12486 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 15:06:18,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 12486 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 15:06:18,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22718 states. [2021-11-19 15:06:19,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22718 to 22718. [2021-11-19 15:06:19,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22718 states, 16989 states have (on average 1.3326269939372535) internal successors, (22640), 17105 states have internal predecessors, (22640), 4062 states have call successors, (4062), 1637 states have call predecessors, (4062), 1666 states have return successors, (4191), 4029 states have call predecessors, (4191), 4061 states have call successors, (4191) [2021-11-19 15:06:19,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22718 states to 22718 states and 30893 transitions. [2021-11-19 15:06:19,711 INFO L78 Accepts]: Start accepts. Automaton has 22718 states and 30893 transitions. Word has length 504 [2021-11-19 15:06:19,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:06:19,711 INFO L470 AbstractCegarLoop]: Abstraction has 22718 states and 30893 transitions. [2021-11-19 15:06:19,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 4 states have call successors, (42), 4 states have call predecessors, (42), 1 states have return successors, (38), 1 states have call predecessors, (38), 1 states have call successors, (38) [2021-11-19 15:06:19,712 INFO L276 IsEmpty]: Start isEmpty. Operand 22718 states and 30893 transitions. [2021-11-19 15:06:19,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 541 [2021-11-19 15:06:19,765 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:06:19,766 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 8, 8, 8, 8, 8, 8, 8, 8, 8, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:06:19,874 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-19 15:06:20,017 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2021-11-19 15:06:20,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 15:06:20,182 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:06:20,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:06:20,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1274233473, now seen corresponding path program 1 times [2021-11-19 15:06:20,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:06:20,193 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [156747685] [2021-11-19 15:06:20,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:06:20,194 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:06:20,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:06:20,196 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:06:20,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-19 15:06:24,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:06:25,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 5278 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 15:06:25,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:06:30,307 INFO L134 CoverageAnalysis]: Checked inductivity of 2441 backedges. 784 proven. 1 refuted. 0 times theorem prover too weak. 1656 trivial. 0 not checked. [2021-11-19 15:06:30,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:06:34,791 INFO L134 CoverageAnalysis]: Checked inductivity of 2441 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 2370 trivial. 0 not checked. [2021-11-19 15:06:34,791 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:06:34,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [156747685] [2021-11-19 15:06:34,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [156747685] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:06:34,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [973370326] [2021-11-19 15:06:34,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:06:34,791 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:06:34,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:06:34,792 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:06:34,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-11-19 15:06:38,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:06:39,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 5278 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 15:06:39,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:06:41,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2441 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 2425 trivial. 0 not checked. [2021-11-19 15:06:41,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:06:43,486 INFO L134 CoverageAnalysis]: Checked inductivity of 2441 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 2425 trivial. 0 not checked. [2021-11-19 15:06:43,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [973370326] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:06:43,486 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 15:06:43,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [7, 7] total 15 [2021-11-19 15:06:43,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049457933] [2021-11-19 15:06:43,487 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:06:43,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 15:06:43,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:06:43,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 15:06:43,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-11-19 15:06:43,491 INFO L87 Difference]: Start difference. First operand 22718 states and 30893 transitions. Second operand has 6 states, 6 states have (on average 27.333333333333332) internal successors, (164), 6 states have internal predecessors, (164), 2 states have call successors, (55), 2 states have call predecessors, (55), 2 states have return successors, (52), 2 states have call predecessors, (52), 2 states have call successors, (52) [2021-11-19 15:06:45,987 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.49s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:07:02,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:07:02,125 INFO L93 Difference]: Finished difference Result 62241 states and 85317 transitions. [2021-11-19 15:07:02,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 15:07:02,126 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 27.333333333333332) internal successors, (164), 6 states have internal predecessors, (164), 2 states have call successors, (55), 2 states have call predecessors, (55), 2 states have return successors, (52), 2 states have call predecessors, (52), 2 states have call successors, (52) Word has length 540 [2021-11-19 15:07:02,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:07:02,278 INFO L225 Difference]: With dead ends: 62241 [2021-11-19 15:07:02,279 INFO L226 Difference]: Without dead ends: 39691 [2021-11-19 15:07:02,334 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2162 GetRequests, 2145 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-11-19 15:07:02,335 INFO L933 BasicCegarLoop]: 4057 mSDtfsCounter, 5153 mSDsluCounter, 9852 mSDsCounter, 0 mSdLazyCounter, 869 mSolverCounterSat, 408 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5153 SdHoareTripleChecker+Valid, 13909 SdHoareTripleChecker+Invalid, 1278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 408 IncrementalHoareTripleChecker+Valid, 869 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.4s IncrementalHoareTripleChecker+Time [2021-11-19 15:07:02,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5153 Valid, 13909 Invalid, 1278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [408 Valid, 869 Invalid, 1 Unknown, 0 Unchecked, 16.4s Time] [2021-11-19 15:07:02,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39691 states. [2021-11-19 15:07:03,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39691 to 22734. [2021-11-19 15:07:03,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22734 states, 17005 states have (on average 1.3323140252866803) internal successors, (22656), 17121 states have internal predecessors, (22656), 4062 states have call successors, (4062), 1637 states have call predecessors, (4062), 1666 states have return successors, (4191), 4029 states have call predecessors, (4191), 4061 states have call successors, (4191) [2021-11-19 15:07:03,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22734 states to 22734 states and 30909 transitions. [2021-11-19 15:07:03,848 INFO L78 Accepts]: Start accepts. Automaton has 22734 states and 30909 transitions. Word has length 540 [2021-11-19 15:07:03,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:07:03,849 INFO L470 AbstractCegarLoop]: Abstraction has 22734 states and 30909 transitions. [2021-11-19 15:07:03,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 27.333333333333332) internal successors, (164), 6 states have internal predecessors, (164), 2 states have call successors, (55), 2 states have call predecessors, (55), 2 states have return successors, (52), 2 states have call predecessors, (52), 2 states have call successors, (52) [2021-11-19 15:07:03,849 INFO L276 IsEmpty]: Start isEmpty. Operand 22734 states and 30909 transitions. [2021-11-19 15:07:03,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 587 [2021-11-19 15:07:03,902 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:07:03,903 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 8, 8, 8, 8, 8, 8, 8, 8, 8, 4, 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, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:07:03,937 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2021-11-19 15:07:04,192 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-19 15:07:04,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:07:04,318 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:07:04,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:07:04,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1611320480, now seen corresponding path program 1 times [2021-11-19 15:07:04,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:07:04,326 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1402778121] [2021-11-19 15:07:04,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:07:04,327 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:07:04,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:07:04,327 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:07:04,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-19 15:07:08,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:07:09,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 5396 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 15:07:09,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:07:14,809 INFO L134 CoverageAnalysis]: Checked inductivity of 2460 backedges. 784 proven. 1 refuted. 0 times theorem prover too weak. 1675 trivial. 0 not checked. [2021-11-19 15:07:14,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:07:19,866 INFO L134 CoverageAnalysis]: Checked inductivity of 2460 backedges. 2 proven. 71 refuted. 0 times theorem prover too weak. 2387 trivial. 0 not checked. [2021-11-19 15:07:19,867 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:07:19,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1402778121] [2021-11-19 15:07:19,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1402778121] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:07:19,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1732785218] [2021-11-19 15:07:19,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:07:19,867 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:07:19,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:07:19,868 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:07:19,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2021-11-19 15:07:23,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:07:24,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 5396 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 15:07:24,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:07:27,708 INFO L134 CoverageAnalysis]: Checked inductivity of 2460 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 2442 trivial. 0 not checked. [2021-11-19 15:07:27,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:07:30,642 INFO L134 CoverageAnalysis]: Checked inductivity of 2460 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 2442 trivial. 0 not checked. [2021-11-19 15:07:30,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1732785218] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:07:30,643 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 15:07:30,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [7, 7] total 17 [2021-11-19 15:07:30,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778044528] [2021-11-19 15:07:30,644 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:07:30,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 15:07:30,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:07:30,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 15:07:30,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-11-19 15:07:30,645 INFO L87 Difference]: Start difference. First operand 22734 states and 30909 transitions. Second operand has 8 states, 8 states have (on average 26.375) internal successors, (211), 8 states have internal predecessors, (211), 4 states have call successors, (65), 2 states have call predecessors, (65), 2 states have return successors, (62), 4 states have call predecessors, (62), 4 states have call successors, (62) [2021-11-19 15:07:33,206 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.56s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:08:06,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:08:06,060 INFO L93 Difference]: Finished difference Result 70925 states and 98837 transitions. [2021-11-19 15:08:06,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-19 15:08:06,061 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 26.375) internal successors, (211), 8 states have internal predecessors, (211), 4 states have call successors, (65), 2 states have call predecessors, (65), 2 states have return successors, (62), 4 states have call predecessors, (62), 4 states have call successors, (62) Word has length 586 [2021-11-19 15:08:06,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:08:06,252 INFO L225 Difference]: With dead ends: 70925 [2021-11-19 15:08:06,252 INFO L226 Difference]: Without dead ends: 48359 [2021-11-19 15:08:06,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2351 GetRequests, 2328 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2021-11-19 15:08:06,313 INFO L933 BasicCegarLoop]: 5517 mSDtfsCounter, 6244 mSDsluCounter, 17863 mSDsCounter, 0 mSdLazyCounter, 1535 mSolverCounterSat, 1347 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6423 SdHoareTripleChecker+Valid, 23380 SdHoareTripleChecker+Invalid, 2883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1347 IncrementalHoareTripleChecker+Valid, 1535 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.2s IncrementalHoareTripleChecker+Time [2021-11-19 15:08:06,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6423 Valid, 23380 Invalid, 2883 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1347 Valid, 1535 Invalid, 1 Unknown, 0 Unchecked, 31.2s Time] [2021-11-19 15:08:06,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48359 states. [2021-11-19 15:08:08,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48359 to 22910. [2021-11-19 15:08:08,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22910 states, 17109 states have (on average 1.331229177625811) internal successors, (22776), 17225 states have internal predecessors, (22776), 4134 states have call successors, (4134), 1637 states have call predecessors, (4134), 1666 states have return successors, (4263), 4101 states have call predecessors, (4263), 4133 states have call successors, (4263) [2021-11-19 15:08:09,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22910 states to 22910 states and 31173 transitions. [2021-11-19 15:08:09,034 INFO L78 Accepts]: Start accepts. Automaton has 22910 states and 31173 transitions. Word has length 586 [2021-11-19 15:08:09,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:08:09,036 INFO L470 AbstractCegarLoop]: Abstraction has 22910 states and 31173 transitions. [2021-11-19 15:08:09,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 26.375) internal successors, (211), 8 states have internal predecessors, (211), 4 states have call successors, (65), 2 states have call predecessors, (65), 2 states have return successors, (62), 4 states have call predecessors, (62), 4 states have call successors, (62) [2021-11-19 15:08:09,036 INFO L276 IsEmpty]: Start isEmpty. Operand 22910 states and 31173 transitions. [2021-11-19 15:08:09,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 782 [2021-11-19 15:08:09,081 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:08:09,081 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 9, 9, 9, 9, 8, 8, 8, 8, 8, 7, 7, 6, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:08:09,108 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2021-11-19 15:08:09,382 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (31)] Ended with exit code 0 [2021-11-19 15:08:09,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:08:09,494 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:08:09,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:08:09,495 INFO L85 PathProgramCache]: Analyzing trace with hash 352390433, now seen corresponding path program 1 times [2021-11-19 15:08:09,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:08:09,502 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [984542767] [2021-11-19 15:08:09,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:08:09,503 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:08:09,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:08:09,504 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:08:09,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-19 15:08:14,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:08:15,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 6106 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 15:08:15,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:08:23,730 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 791 proven. 1 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2021-11-19 15:08:23,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:08:30,057 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 6 proven. 77 refuted. 0 times theorem prover too weak. 2569 trivial. 0 not checked. [2021-11-19 15:08:30,058 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:08:30,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [984542767] [2021-11-19 15:08:30,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [984542767] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:08:30,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [228756811] [2021-11-19 15:08:30,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:08:30,059 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:08:30,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:08:30,059 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:08:30,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2021-11-19 15:08:33,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:08:34,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 6106 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 15:08:34,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:08:37,805 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 2570 trivial. 0 not checked. [2021-11-19 15:08:37,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:08:39,979 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 2630 trivial. 0 not checked. [2021-11-19 15:08:39,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [228756811] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:08:39,980 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 15:08:39,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7, 7] total 12 [2021-11-19 15:08:39,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532370344] [2021-11-19 15:08:39,981 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:08:39,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 15:08:39,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:08:39,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 15:08:39,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-19 15:08:39,983 INFO L87 Difference]: Start difference. First operand 22910 states and 31173 transitions. Second operand has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 2 states have call successors, (98), 2 states have call predecessors, (98), 2 states have return successors, (95), 2 states have call predecessors, (95), 2 states have call successors, (95) [2021-11-19 15:08:42,131 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:08:42,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:08:42,831 INFO L93 Difference]: Finished difference Result 45660 states and 62157 transitions. [2021-11-19 15:08:42,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 15:08:42,835 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 2 states have call successors, (98), 2 states have call predecessors, (98), 2 states have return successors, (95), 2 states have call predecessors, (95), 2 states have call successors, (95) Word has length 781 [2021-11-19 15:08:42,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:08:42,888 INFO L225 Difference]: With dead ends: 45660 [2021-11-19 15:08:42,888 INFO L226 Difference]: Without dead ends: 22918 [2021-11-19 15:08:42,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3120 GetRequests, 3110 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-19 15:08:42,930 INFO L933 BasicCegarLoop]: 2087 mSDtfsCounter, 0 mSDsluCounter, 2083 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4170 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-19 15:08:42,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 4170 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-19 15:08:42,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22918 states. [2021-11-19 15:08:43,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22918 to 22918. [2021-11-19 15:08:43,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22918 states, 17117 states have (on average 1.3310743705088508) internal successors, (22784), 17233 states have internal predecessors, (22784), 4134 states have call successors, (4134), 1637 states have call predecessors, (4134), 1666 states have return successors, (4263), 4101 states have call predecessors, (4263), 4133 states have call successors, (4263) [2021-11-19 15:08:43,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22918 states to 22918 states and 31181 transitions. [2021-11-19 15:08:43,938 INFO L78 Accepts]: Start accepts. Automaton has 22918 states and 31181 transitions. Word has length 781 [2021-11-19 15:08:43,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:08:43,940 INFO L470 AbstractCegarLoop]: Abstraction has 22918 states and 31181 transitions. [2021-11-19 15:08:43,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 2 states have call successors, (98), 2 states have call predecessors, (98), 2 states have return successors, (95), 2 states have call predecessors, (95), 2 states have call successors, (95) [2021-11-19 15:08:43,941 INFO L276 IsEmpty]: Start isEmpty. Operand 22918 states and 31181 transitions. [2021-11-19 15:08:43,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 791 [2021-11-19 15:08:43,995 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:08:43,996 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 9, 9, 9, 9, 8, 8, 8, 8, 8, 7, 7, 6, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:08:44,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (34)] Forceful destruction successful, exit code 0 [2021-11-19 15:08:44,320 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-11-19 15:08:44,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:08:44,410 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:08:44,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:08:44,411 INFO L85 PathProgramCache]: Analyzing trace with hash -2079540317, now seen corresponding path program 1 times [2021-11-19 15:08:44,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:08:44,417 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1359166726] [2021-11-19 15:08:44,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:08:44,417 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:08:44,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:08:44,418 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:08:44,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-19 15:08:49,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:08:50,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 6146 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 15:08:50,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:08:58,630 INFO L134 CoverageAnalysis]: Checked inductivity of 2661 backedges. 791 proven. 1 refuted. 0 times theorem prover too weak. 1869 trivial. 0 not checked. [2021-11-19 15:08:58,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:09:04,693 INFO L134 CoverageAnalysis]: Checked inductivity of 2661 backedges. 6 proven. 77 refuted. 0 times theorem prover too weak. 2578 trivial. 0 not checked. [2021-11-19 15:09:04,693 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:09:04,693 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1359166726] [2021-11-19 15:09:04,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1359166726] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:09:04,693 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1899736991] [2021-11-19 15:09:04,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:09:04,694 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:09:04,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:09:04,722 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:09:04,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2021-11-19 15:09:08,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:09:09,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 6146 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 15:09:09,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:09:15,423 INFO L134 CoverageAnalysis]: Checked inductivity of 2661 backedges. 128 proven. 0 refuted. 0 times theorem prover too weak. 2533 trivial. 0 not checked. [2021-11-19 15:09:15,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:09:19,209 INFO L134 CoverageAnalysis]: Checked inductivity of 2661 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 2639 trivial. 0 not checked. [2021-11-19 15:09:19,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1899736991] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:09:19,209 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 15:09:19,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7, 7] total 13 [2021-11-19 15:09:19,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115604618] [2021-11-19 15:09:19,210 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:09:19,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 15:09:19,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:09:19,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 15:09:19,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-19 15:09:19,212 INFO L87 Difference]: Start difference. First operand 22918 states and 31181 transitions. Second operand has 4 states, 4 states have (on average 86.75) internal successors, (347), 4 states have internal predecessors, (347), 4 states have call successors, (133), 2 states have call predecessors, (133), 2 states have return successors, (130), 4 states have call predecessors, (130), 4 states have call successors, (130) [2021-11-19 15:09:20,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:09:20,471 INFO L93 Difference]: Finished difference Result 47575 states and 65053 transitions. [2021-11-19 15:09:20,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 15:09:20,472 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 86.75) internal successors, (347), 4 states have internal predecessors, (347), 4 states have call successors, (133), 2 states have call predecessors, (133), 2 states have return successors, (130), 4 states have call predecessors, (130), 4 states have call successors, (130) Word has length 790 [2021-11-19 15:09:20,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:09:20,527 INFO L225 Difference]: With dead ends: 47575 [2021-11-19 15:09:20,527 INFO L226 Difference]: Without dead ends: 24825 [2021-11-19 15:09:20,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3156 GetRequests, 3145 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-19 15:09:20,556 INFO L933 BasicCegarLoop]: 2590 mSDtfsCounter, 534 mSDsluCounter, 4018 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 631 SdHoareTripleChecker+Valid, 6608 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 15:09:20,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [631 Valid, 6608 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 15:09:20,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24825 states. [2021-11-19 15:09:21,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24825 to 23158. [2021-11-19 15:09:21,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23158 states, 17317 states have (on average 1.331870416353872) internal successors, (23064), 17433 states have internal predecessors, (23064), 4174 states have call successors, (4174), 1637 states have call predecessors, (4174), 1666 states have return successors, (4303), 4141 states have call predecessors, (4303), 4173 states have call successors, (4303) [2021-11-19 15:09:21,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23158 states to 23158 states and 31541 transitions. [2021-11-19 15:09:21,575 INFO L78 Accepts]: Start accepts. Automaton has 23158 states and 31541 transitions. Word has length 790 [2021-11-19 15:09:21,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:09:21,575 INFO L470 AbstractCegarLoop]: Abstraction has 23158 states and 31541 transitions. [2021-11-19 15:09:21,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 86.75) internal successors, (347), 4 states have internal predecessors, (347), 4 states have call successors, (133), 2 states have call predecessors, (133), 2 states have return successors, (130), 4 states have call predecessors, (130), 4 states have call successors, (130) [2021-11-19 15:09:21,576 INFO L276 IsEmpty]: Start isEmpty. Operand 23158 states and 31541 transitions. [2021-11-19 15:09:21,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 817 [2021-11-19 15:09:21,627 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:09:21,627 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:09:21,660 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (36)] Forceful destruction successful, exit code 0 [2021-11-19 15:09:21,937 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (35)] Ended with exit code 0 [2021-11-19 15:09:22,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:09:22,043 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:09:22,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:09:22,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1135035757, now seen corresponding path program 1 times [2021-11-19 15:09:22,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:09:22,050 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [260786226] [2021-11-19 15:09:22,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:09:22,051 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:09:22,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:09:22,051 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:09:22,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-11-19 15:09:27,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:09:27,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 6216 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 15:09:27,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:09:35,977 INFO L134 CoverageAnalysis]: Checked inductivity of 2726 backedges. 791 proven. 1 refuted. 0 times theorem prover too weak. 1934 trivial. 0 not checked. [2021-11-19 15:09:35,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:09:42,264 INFO L134 CoverageAnalysis]: Checked inductivity of 2726 backedges. 6 proven. 77 refuted. 0 times theorem prover too weak. 2643 trivial. 0 not checked. [2021-11-19 15:09:42,264 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:09:42,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [260786226] [2021-11-19 15:09:42,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [260786226] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:09:42,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1552830692] [2021-11-19 15:09:42,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:09:42,265 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:09:42,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:09:42,265 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:09:42,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2021-11-19 15:09:46,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:09:47,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 6216 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 15:09:47,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:09:52,427 INFO L134 CoverageAnalysis]: Checked inductivity of 2726 backedges. 168 proven. 0 refuted. 0 times theorem prover too weak. 2558 trivial. 0 not checked. [2021-11-19 15:09:52,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:09:55,747 INFO L134 CoverageAnalysis]: Checked inductivity of 2726 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 2704 trivial. 0 not checked. [2021-11-19 15:09:55,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1552830692] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:09:55,747 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 15:09:55,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7, 7] total 12 [2021-11-19 15:09:55,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731404450] [2021-11-19 15:09:55,749 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:09:55,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 15:09:55,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:09:55,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 15:09:55,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-19 15:09:55,751 INFO L87 Difference]: Start difference. First operand 23158 states and 31541 transitions. Second operand has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 3 states have call successors, (137), 2 states have call predecessors, (137), 2 states have return successors, (134), 3 states have call predecessors, (134), 3 states have call successors, (134) [2021-11-19 15:09:58,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:09:58,520 INFO L93 Difference]: Finished difference Result 54437 states and 75821 transitions. [2021-11-19 15:09:58,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 15:09:58,524 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 3 states have call successors, (137), 2 states have call predecessors, (137), 2 states have return successors, (134), 3 states have call predecessors, (134), 3 states have call successors, (134) Word has length 816 [2021-11-19 15:09:58,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:09:58,774 INFO L225 Difference]: With dead ends: 54437 [2021-11-19 15:09:58,774 INFO L226 Difference]: Without dead ends: 31447 [2021-11-19 15:09:58,807 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3260 GetRequests, 3250 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-19 15:09:58,808 INFO L933 BasicCegarLoop]: 2944 mSDtfsCounter, 697 mSDsluCounter, 2099 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 875 SdHoareTripleChecker+Valid, 5043 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-19 15:09:58,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [875 Valid, 5043 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-19 15:09:58,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31447 states. [2021-11-19 15:09:59,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31447 to 23158. [2021-11-19 15:09:59,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23158 states, 17317 states have (on average 1.331408442570884) internal successors, (23056), 17433 states have internal predecessors, (23056), 4174 states have call successors, (4174), 1637 states have call predecessors, (4174), 1666 states have return successors, (4303), 4141 states have call predecessors, (4303), 4173 states have call successors, (4303) [2021-11-19 15:09:59,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23158 states to 23158 states and 31533 transitions. [2021-11-19 15:09:59,957 INFO L78 Accepts]: Start accepts. Automaton has 23158 states and 31533 transitions. Word has length 816 [2021-11-19 15:09:59,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:09:59,958 INFO L470 AbstractCegarLoop]: Abstraction has 23158 states and 31533 transitions. [2021-11-19 15:09:59,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 3 states have call successors, (137), 2 states have call predecessors, (137), 2 states have return successors, (134), 3 states have call predecessors, (134), 3 states have call successors, (134) [2021-11-19 15:09:59,958 INFO L276 IsEmpty]: Start isEmpty. Operand 23158 states and 31533 transitions. [2021-11-19 15:09:59,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 803 [2021-11-19 15:09:59,992 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:09:59,993 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 9, 9, 9, 9, 8, 8, 8, 8, 8, 7, 7, 6, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:10:00,086 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2021-11-19 15:10:00,212 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (38)] Ended with exit code 0 [2021-11-19 15:10:00,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 15:10:00,394 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:10:00,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:10:00,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1688787858, now seen corresponding path program 1 times [2021-11-19 15:10:00,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:10:00,400 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [14934309] [2021-11-19 15:10:00,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:10:00,400 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:10:00,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:10:00,401 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:10:00,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-11-19 15:10:05,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:10:06,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 6152 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 15:10:06,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:10:14,046 INFO L134 CoverageAnalysis]: Checked inductivity of 2656 backedges. 791 proven. 1 refuted. 0 times theorem prover too weak. 1864 trivial. 0 not checked. [2021-11-19 15:10:14,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:10:20,210 INFO L134 CoverageAnalysis]: Checked inductivity of 2656 backedges. 6 proven. 77 refuted. 0 times theorem prover too weak. 2573 trivial. 0 not checked. [2021-11-19 15:10:20,210 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:10:20,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [14934309] [2021-11-19 15:10:20,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [14934309] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:10:20,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [240873817] [2021-11-19 15:10:20,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:10:20,211 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:10:20,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:10:20,212 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:10:20,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2021-11-19 15:10:24,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:10:25,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 6152 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 15:10:25,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:10:30,931 INFO L134 CoverageAnalysis]: Checked inductivity of 2656 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 2524 trivial. 0 not checked. [2021-11-19 15:10:30,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:10:34,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2656 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 2633 trivial. 0 not checked. [2021-11-19 15:10:34,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [240873817] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:10:34,074 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 15:10:34,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [7, 7] total 14 [2021-11-19 15:10:34,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685099289] [2021-11-19 15:10:34,075 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:10:34,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 15:10:34,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:10:34,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 15:10:34,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-11-19 15:10:34,078 INFO L87 Difference]: Start difference. First operand 23158 states and 31533 transitions. Second operand has 5 states, 5 states have (on average 69.0) internal successors, (345), 5 states have internal predecessors, (345), 2 states have call successors, (130), 2 states have call predecessors, (130), 2 states have return successors, (127), 2 states have call predecessors, (127), 2 states have call successors, (127) [2021-11-19 15:10:39,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:10:39,799 INFO L93 Difference]: Finished difference Result 72647 states and 104277 transitions. [2021-11-19 15:10:39,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 15:10:39,800 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 69.0) internal successors, (345), 5 states have internal predecessors, (345), 2 states have call successors, (130), 2 states have call predecessors, (130), 2 states have return successors, (127), 2 states have call predecessors, (127), 2 states have call successors, (127) Word has length 802 [2021-11-19 15:10:39,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:10:39,947 INFO L225 Difference]: With dead ends: 72647 [2021-11-19 15:10:39,947 INFO L226 Difference]: Without dead ends: 49657 [2021-11-19 15:10:39,986 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3209 GetRequests, 3194 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-11-19 15:10:39,987 INFO L933 BasicCegarLoop]: 3733 mSDtfsCounter, 3753 mSDsluCounter, 9399 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 872 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3922 SdHoareTripleChecker+Valid, 13132 SdHoareTripleChecker+Invalid, 897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 872 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-11-19 15:10:39,987 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3922 Valid, 13132 Invalid, 897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [872 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-11-19 15:10:40,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49657 states. [2021-11-19 15:10:41,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49657 to 23206. [2021-11-19 15:10:41,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23206 states, 17365 states have (on average 1.330492369709185) internal successors, (23104), 17481 states have internal predecessors, (23104), 4174 states have call successors, (4174), 1637 states have call predecessors, (4174), 1666 states have return successors, (4303), 4141 states have call predecessors, (4303), 4173 states have call successors, (4303) [2021-11-19 15:10:41,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23206 states to 23206 states and 31581 transitions. [2021-11-19 15:10:41,482 INFO L78 Accepts]: Start accepts. Automaton has 23206 states and 31581 transitions. Word has length 802 [2021-11-19 15:10:41,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:10:41,482 INFO L470 AbstractCegarLoop]: Abstraction has 23206 states and 31581 transitions. [2021-11-19 15:10:41,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 69.0) internal successors, (345), 5 states have internal predecessors, (345), 2 states have call successors, (130), 2 states have call predecessors, (130), 2 states have return successors, (127), 2 states have call predecessors, (127), 2 states have call successors, (127) [2021-11-19 15:10:41,483 INFO L276 IsEmpty]: Start isEmpty. Operand 23206 states and 31581 transitions. [2021-11-19 15:10:41,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 810 [2021-11-19 15:10:41,725 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:10:41,725 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:10:41,750 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (40)] Ended with exit code 0 [2021-11-19 15:10:42,015 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2021-11-19 15:10:42,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:10:42,126 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:10:42,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:10:42,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1429228917, now seen corresponding path program 1 times [2021-11-19 15:10:42,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:10:42,133 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [715280722] [2021-11-19 15:10:42,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:10:42,134 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:10:42,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:10:42,134 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:10:42,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-11-19 15:10:47,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:10:47,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 6185 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 15:10:47,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:10:55,870 INFO L134 CoverageAnalysis]: Checked inductivity of 2717 backedges. 791 proven. 1 refuted. 0 times theorem prover too weak. 1925 trivial. 0 not checked. [2021-11-19 15:10:55,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:11:01,987 INFO L134 CoverageAnalysis]: Checked inductivity of 2717 backedges. 6 proven. 77 refuted. 0 times theorem prover too weak. 2634 trivial. 0 not checked. [2021-11-19 15:11:01,987 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:11:01,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [715280722] [2021-11-19 15:11:01,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [715280722] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:11:01,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1999447902] [2021-11-19 15:11:01,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:11:01,987 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:11:01,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:11:01,988 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:11:01,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2021-11-19 15:11:05,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:11:06,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 6185 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 15:11:06,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:11:11,729 INFO L134 CoverageAnalysis]: Checked inductivity of 2717 backedges. 168 proven. 0 refuted. 0 times theorem prover too weak. 2549 trivial. 0 not checked. [2021-11-19 15:11:11,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:11:14,525 INFO L134 CoverageAnalysis]: Checked inductivity of 2717 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 2695 trivial. 0 not checked. [2021-11-19 15:11:14,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1999447902] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:11:14,525 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 15:11:14,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7, 7] total 12 [2021-11-19 15:11:14,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732117645] [2021-11-19 15:11:14,526 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:11:14,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 15:11:14,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:11:14,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 15:11:14,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-19 15:11:14,528 INFO L87 Difference]: Start difference. First operand 23206 states and 31581 transitions. Second operand has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 2 states have call successors, (133), 2 states have call predecessors, (133), 2 states have return successors, (130), 2 states have call predecessors, (130), 2 states have call successors, (130) [2021-11-19 15:11:16,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:11:16,063 INFO L93 Difference]: Finished difference Result 46252 states and 62949 transitions. [2021-11-19 15:11:16,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 15:11:16,064 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 2 states have call successors, (133), 2 states have call predecessors, (133), 2 states have return successors, (130), 2 states have call predecessors, (130), 2 states have call successors, (130) Word has length 809 [2021-11-19 15:11:16,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:11:16,110 INFO L225 Difference]: With dead ends: 46252 [2021-11-19 15:11:16,110 INFO L226 Difference]: Without dead ends: 23214 [2021-11-19 15:11:16,142 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3232 GetRequests, 3222 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-19 15:11:16,143 INFO L933 BasicCegarLoop]: 2086 mSDtfsCounter, 0 mSDsluCounter, 2081 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4167 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 15:11:16,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 4167 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 15:11:16,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23214 states. [2021-11-19 15:11:17,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23214 to 23214. [2021-11-19 15:11:17,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23214 states, 17373 states have (on average 1.3303401830426524) internal successors, (23112), 17489 states have internal predecessors, (23112), 4174 states have call successors, (4174), 1637 states have call predecessors, (4174), 1666 states have return successors, (4303), 4141 states have call predecessors, (4303), 4173 states have call successors, (4303) [2021-11-19 15:11:17,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23214 states to 23214 states and 31589 transitions. [2021-11-19 15:11:17,150 INFO L78 Accepts]: Start accepts. Automaton has 23214 states and 31589 transitions. Word has length 809 [2021-11-19 15:11:17,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:11:17,151 INFO L470 AbstractCegarLoop]: Abstraction has 23214 states and 31589 transitions. [2021-11-19 15:11:17,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 2 states have call successors, (133), 2 states have call predecessors, (133), 2 states have return successors, (130), 2 states have call predecessors, (130), 2 states have call successors, (130) [2021-11-19 15:11:17,151 INFO L276 IsEmpty]: Start isEmpty. Operand 23214 states and 31589 transitions. [2021-11-19 15:11:17,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 819 [2021-11-19 15:11:17,179 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:11:17,180 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:11:17,258 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (41)] Ended with exit code 0 [2021-11-19 15:11:17,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (42)] Forceful destruction successful, exit code 0 [2021-11-19 15:11:17,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 15:11:17,581 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:11:17,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:11:17,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1888758998, now seen corresponding path program 1 times [2021-11-19 15:11:17,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:11:17,587 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1651479556] [2021-11-19 15:11:17,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:11:17,587 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:11:17,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:11:17,588 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:11:17,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-11-19 15:11:22,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:11:22,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 6223 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 15:11:22,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:11:30,599 INFO L134 CoverageAnalysis]: Checked inductivity of 2726 backedges. 791 proven. 1 refuted. 0 times theorem prover too weak. 1934 trivial. 0 not checked. [2021-11-19 15:11:30,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:11:36,159 INFO L134 CoverageAnalysis]: Checked inductivity of 2726 backedges. 6 proven. 77 refuted. 0 times theorem prover too weak. 2643 trivial. 0 not checked. [2021-11-19 15:11:36,159 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:11:36,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1651479556] [2021-11-19 15:11:36,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1651479556] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:11:36,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1140807311] [2021-11-19 15:11:36,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:11:36,160 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:11:36,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:11:36,161 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:11:36,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_678996c2-c0ac-4a32-8388-25b2a5ba1f67/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (44)] Waiting until timeout for monitored process [2021-11-19 15:11:39,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:11:40,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 6223 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 15:11:40,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:11:45,363 INFO L134 CoverageAnalysis]: Checked inductivity of 2726 backedges. 184 proven. 0 refuted. 0 times theorem prover too weak. 2542 trivial. 0 not checked. [2021-11-19 15:11:45,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:11:48,834 INFO L134 CoverageAnalysis]: Checked inductivity of 2726 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 2704 trivial. 0 not checked. [2021-11-19 15:11:48,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1140807311] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:11:48,835 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 15:11:48,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7, 7] total 13 [2021-11-19 15:11:48,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226361868] [2021-11-19 15:11:48,836 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:11:48,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 15:11:48,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:11:48,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 15:11:48,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-19 15:11:48,838 INFO L87 Difference]: Start difference. First operand 23214 states and 31589 transitions. Second operand has 4 states, 4 states have (on average 89.75) internal successors, (359), 4 states have internal predecessors, (359), 4 states have call successors, (137), 2 states have call predecessors, (137), 2 states have return successors, (134), 4 states have call predecessors, (134), 4 states have call successors, (134)