./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--scsi--megaraid--megaraid_mm.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--scsi--megaraid--megaraid_mm.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8 --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 34ead930b8137fdc7abb50622ed73bdb27f2c7ae71d0ef3b9d44cfc9bee95799 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:21:09,683 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:21:09,686 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:21:09,741 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:21:09,742 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:21:09,743 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:21:09,745 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:21:09,747 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:21:09,750 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:21:09,751 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:21:09,752 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:21:09,754 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:21:09,755 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:21:09,756 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:21:09,758 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:21:09,759 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:21:09,761 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:21:09,762 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:21:09,764 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:21:09,767 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:21:09,769 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:21:09,771 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:21:09,772 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:21:09,774 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:21:09,778 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:21:09,778 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:21:09,779 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:21:09,780 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:21:09,780 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:21:09,782 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:21:09,782 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:21:09,783 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:21:09,784 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:21:09,785 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:21:09,786 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:21:09,787 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:21:09,788 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:21:09,788 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:21:09,788 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:21:09,789 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:21:09,790 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:21:09,791 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-07 02:21:09,815 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:21:09,815 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:21:09,816 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:21:09,816 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:21:09,816 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:21:09,817 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:21:09,817 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 02:21:09,817 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:21:09,817 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:21:09,818 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 02:21:09,818 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 02:21:09,818 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:21:09,818 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 02:21:09,818 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 02:21:09,819 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 02:21:09,820 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:21:09,820 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 02:21:09,820 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:21:09,820 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:21:09,820 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:21:09,821 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:21:09,821 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:21:09,821 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:21:09,821 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:21:09,821 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:21:09,822 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:21:09,822 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:21:09,822 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:21:09,822 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:21:09,823 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:21:09,823 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:21:09,823 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 02:21:09,823 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 02:21:09,824 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:21:09,824 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:21:09,824 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:21:09,824 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_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 34ead930b8137fdc7abb50622ed73bdb27f2c7ae71d0ef3b9d44cfc9bee95799 [2021-11-07 02:21:10,127 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:21:10,153 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:21:10,155 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:21:10,157 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:21:10,157 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:21:10,158 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--scsi--megaraid--megaraid_mm.ko-entry_point.cil.out.i [2021-11-07 02:21:10,218 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/data/f4859529a/5af6c8e9dced4b7189e07987f9a2bdf9/FLAGcc6e38f32 [2021-11-07 02:21:11,035 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:21:11,036 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--scsi--megaraid--megaraid_mm.ko-entry_point.cil.out.i [2021-11-07 02:21:11,086 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/data/f4859529a/5af6c8e9dced4b7189e07987f9a2bdf9/FLAGcc6e38f32 [2021-11-07 02:21:11,557 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/data/f4859529a/5af6c8e9dced4b7189e07987f9a2bdf9 [2021-11-07 02:21:11,560 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:21:11,563 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:21:11,566 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:21:11,567 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:21:11,570 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:21:11,572 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:21:11" (1/1) ... [2021-11-07 02:21:11,573 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b8718b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:21:11, skipping insertion in model container [2021-11-07 02:21:11,573 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:21:11" (1/1) ... [2021-11-07 02:21:11,580 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:21:11,684 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:21:12,553 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:21:12,556 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:21:12,653 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:21:12,702 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:21:12,703 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:21:12,711 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:21:12,740 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:21:12,743 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:21:12,744 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:21:12,753 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:21:12,754 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:21:12,758 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:21:12,817 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--scsi--megaraid--megaraid_mm.ko-entry_point.cil.out.i[145794,145807] [2021-11-07 02:21:12,872 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:21:12,912 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) [2021-11-07 02:21:12,913 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7db7162b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:21:12, skipping insertion in model container [2021-11-07 02:21:12,913 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:21:12,914 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 02:21:12,917 INFO L168 Benchmark]: Toolchain (without parser) took 1351.95 ms. Allocated memory was 104.9 MB in the beginning and 148.9 MB in the end (delta: 44.0 MB). Free memory was 78.0 MB in the beginning and 106.6 MB in the end (delta: -28.6 MB). Peak memory consumption was 37.8 MB. Max. memory is 16.1 GB. [2021-11-07 02:21:12,917 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 104.9 MB. Free memory is still 79.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 02:21:12,919 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1347.45 ms. Allocated memory was 104.9 MB in the beginning and 148.9 MB in the end (delta: 44.0 MB). Free memory was 77.8 MB in the beginning and 106.6 MB in the end (delta: -28.9 MB). Peak memory consumption was 37.8 MB. Max. memory is 16.1 GB. [2021-11-07 02:21:12,921 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 104.9 MB. Free memory is still 79.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 1347.45 ms. Allocated memory was 104.9 MB in the beginning and 148.9 MB in the end (delta: 44.0 MB). Free memory was 77.8 MB in the beginning and 106.6 MB in the end (delta: -28.9 MB). Peak memory consumption was 37.8 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 3935]: 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_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--scsi--megaraid--megaraid_mm.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8 --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 34ead930b8137fdc7abb50622ed73bdb27f2c7ae71d0ef3b9d44cfc9bee95799 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:21:15,179 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:21:15,183 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:21:15,242 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:21:15,242 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:21:15,248 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:21:15,251 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:21:15,256 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:21:15,260 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:21:15,270 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:21:15,271 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:21:15,273 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:21:15,275 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:21:15,277 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:21:15,279 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:21:15,282 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:21:15,284 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:21:15,285 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:21:15,290 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:21:15,292 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:21:15,294 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:21:15,298 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:21:15,299 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:21:15,301 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:21:15,306 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:21:15,307 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:21:15,312 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:21:15,313 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:21:15,313 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:21:15,315 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:21:15,315 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:21:15,316 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:21:15,317 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:21:15,318 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:21:15,319 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:21:15,319 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:21:15,320 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:21:15,320 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:21:15,336 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:21:15,337 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:21:15,338 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:21:15,339 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-07 02:21:15,363 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:21:15,363 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:21:15,364 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:21:15,364 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:21:15,365 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:21:15,365 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:21:15,365 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:21:15,365 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:21:15,366 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:21:15,366 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:21:15,367 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:21:15,367 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:21:15,367 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:21:15,367 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:21:15,368 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:21:15,368 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 02:21:15,368 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 02:21:15,368 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:21:15,368 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:21:15,369 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:21:15,369 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:21:15,369 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 02:21:15,369 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:21:15,370 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:21:15,370 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:21:15,370 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:21:15,370 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:21:15,371 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 02:21:15,371 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 02:21:15,371 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:21:15,371 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:21:15,372 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:21:15,372 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_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 34ead930b8137fdc7abb50622ed73bdb27f2c7ae71d0ef3b9d44cfc9bee95799 [2021-11-07 02:21:15,762 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:21:15,783 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:21:15,786 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:21:15,787 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:21:15,788 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:21:15,789 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--scsi--megaraid--megaraid_mm.ko-entry_point.cil.out.i [2021-11-07 02:21:15,860 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/data/0cf88c31d/98ce8b1f148246aeb607b168c72a6b50/FLAGa937fcd73 [2021-11-07 02:21:16,784 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:21:16,785 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--scsi--megaraid--megaraid_mm.ko-entry_point.cil.out.i [2021-11-07 02:21:16,814 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/data/0cf88c31d/98ce8b1f148246aeb607b168c72a6b50/FLAGa937fcd73 [2021-11-07 02:21:17,289 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/data/0cf88c31d/98ce8b1f148246aeb607b168c72a6b50 [2021-11-07 02:21:17,291 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:21:17,293 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:21:17,294 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:21:17,294 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:21:17,298 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:21:17,299 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:21:17" (1/1) ... [2021-11-07 02:21:17,300 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ba12823 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:21:17, skipping insertion in model container [2021-11-07 02:21:17,300 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:21:17" (1/1) ... [2021-11-07 02:21:17,308 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:21:17,416 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:21:18,675 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--scsi--megaraid--megaraid_mm.ko-entry_point.cil.out.i[145794,145807] [2021-11-07 02:21:18,725 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:21:18,776 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 02:21:18,827 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:21:19,101 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--scsi--megaraid--megaraid_mm.ko-entry_point.cil.out.i[145794,145807] [2021-11-07 02:21:19,114 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:21:19,144 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 02:21:19,396 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--scsi--megaraid--megaraid_mm.ko-entry_point.cil.out.i[145794,145807] [2021-11-07 02:21:19,403 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:21:19,465 INFO L208 MainTranslator]: Completed translation [2021-11-07 02:21:19,466 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:21:19 WrapperNode [2021-11-07 02:21:19,466 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:21:19,467 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 02:21:19,468 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 02:21:19,468 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 02:21:19,476 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:21:19" (1/1) ... [2021-11-07 02:21:19,573 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:21:19" (1/1) ... [2021-11-07 02:21:19,861 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 02:21:19,862 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 02:21:19,862 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 02:21:19,862 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 02:21:19,871 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:21:19" (1/1) ... [2021-11-07 02:21:19,871 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:21:19" (1/1) ... [2021-11-07 02:21:19,920 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:21:19" (1/1) ... [2021-11-07 02:21:19,920 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:21:19" (1/1) ... [2021-11-07 02:21:20,056 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:21:19" (1/1) ... [2021-11-07 02:21:20,114 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:21:19" (1/1) ... [2021-11-07 02:21:20,127 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:21:19" (1/1) ... [2021-11-07 02:21:20,151 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 02:21:20,152 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 02:21:20,153 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 02:21:20,153 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 02:21:20,154 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:21:19" (1/1) ... [2021-11-07 02:21:20,160 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:21:20,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:21:20,190 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 02:21:20,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 02:21:20,234 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-07 02:21:20,234 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-07 02:21:20,234 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-07 02:21:20,234 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-07 02:21:20,235 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-07 02:21:20,235 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-07 02:21:20,235 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-07 02:21:20,235 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2021-11-07 02:21:20,235 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-07 02:21:20,235 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2021-11-07 02:21:20,236 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 02:21:20,236 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 02:21:20,236 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 02:21:20,236 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2021-11-07 02:21:20,236 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-07 02:21:20,236 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2021-11-07 02:21:20,237 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-07 02:21:20,237 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 02:21:20,237 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-07 02:21:20,237 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-07 02:21:20,237 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-07 02:21:20,237 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 02:21:20,238 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-07 02:21:20,238 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-07 02:21:20,238 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2021-11-07 02:21:20,238 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 02:21:20,238 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-07 02:21:20,238 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-07 02:21:20,239 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-07 02:21:20,239 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 02:21:20,239 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 02:22:10,434 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 02:22:10,435 INFO L299 CfgBuilder]: Removed 938 assume(true) statements. [2021-11-07 02:22:10,444 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:22:10 BoogieIcfgContainer [2021-11-07 02:22:10,444 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 02:22:10,447 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 02:22:10,447 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 02:22:10,450 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 02:22:10,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:21:17" (1/3) ... [2021-11-07 02:22:10,451 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14be81e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:22:10, skipping insertion in model container [2021-11-07 02:22:10,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:21:19" (2/3) ... [2021-11-07 02:22:10,452 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14be81e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:22:10, skipping insertion in model container [2021-11-07 02:22:10,452 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:22:10" (3/3) ... [2021-11-07 02:22:10,453 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-43_2a-drivers--scsi--megaraid--megaraid_mm.ko-entry_point.cil.out.i [2021-11-07 02:22:10,459 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 02:22:10,459 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-11-07 02:22:10,529 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 02:22:10,536 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 [2021-11-07 02:22:10,536 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-11-07 02:22:10,577 INFO L276 IsEmpty]: Start isEmpty. Operand has 750 states, 743 states have (on average 1.4010767160161508) internal successors, (1041), 749 states have internal predecessors, (1041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:10,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 02:22:10,602 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:22:10,603 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:22:10,604 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:22:10,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:22:10,613 INFO L85 PathProgramCache]: Analyzing trace with hash -453684691, now seen corresponding path program 1 times [2021-11-07 02:22:10,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:22:10,634 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1229322567] [2021-11-07 02:22:10,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:22:10,636 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:22:10,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:22:10,640 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:22:10,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 02:22:11,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:22:11,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 935 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 02:22:11,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:22:12,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:22:12,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:22:12,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:22:12,669 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:22:12,669 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1229322567] [2021-11-07 02:22:12,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1229322567] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:22:12,670 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:22:12,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 02:22:12,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608855228] [2021-11-07 02:22:12,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 02:22:12,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:22:12,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 02:22:12,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 02:22:12,694 INFO L87 Difference]: Start difference. First operand has 750 states, 743 states have (on average 1.4010767160161508) internal successors, (1041), 749 states have internal predecessors, (1041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 37.0) internal successors, (74), 2 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:12,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:22:12,760 INFO L93 Difference]: Finished difference Result 1482 states and 2059 transitions. [2021-11-07 02:22:12,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 02:22:12,761 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 37.0) internal successors, (74), 2 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-07 02:22:12,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:22:12,783 INFO L225 Difference]: With dead ends: 1482 [2021-11-07 02:22:12,783 INFO L226 Difference]: Without dead ends: 738 [2021-11-07 02:22:12,800 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 02:22:12,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 738 states. [2021-11-07 02:22:12,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 738 to 738. [2021-11-07 02:22:12,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 738 states, 732 states have (on average 1.3743169398907105) internal successors, (1006), 737 states have internal predecessors, (1006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:12,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 1006 transitions. [2021-11-07 02:22:12,898 INFO L78 Accepts]: Start accepts. Automaton has 738 states and 1006 transitions. Word has length 74 [2021-11-07 02:22:12,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:22:12,899 INFO L470 AbstractCegarLoop]: Abstraction has 738 states and 1006 transitions. [2021-11-07 02:22:12,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 37.0) internal successors, (74), 2 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:12,899 INFO L276 IsEmpty]: Start isEmpty. Operand 738 states and 1006 transitions. [2021-11-07 02:22:12,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 02:22:12,903 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:22:12,903 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:22:12,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 02:22:13,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:22:13,124 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:22:13,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:22:13,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1696617127, now seen corresponding path program 1 times [2021-11-07 02:22:13,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:22:13,128 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [818930483] [2021-11-07 02:22:13,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:22:13,128 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:22:13,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:22:13,130 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:22:13,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 02:22:14,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:22:14,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 936 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:22:14,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:22:14,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:22:14,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:22:15,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:22:15,118 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:22:15,119 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [818930483] [2021-11-07 02:22:15,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [818930483] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:22:15,119 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:22:15,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:22:15,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704519593] [2021-11-07 02:22:15,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:22:15,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:22:15,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:22:15,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:22:15,123 INFO L87 Difference]: Start difference. First operand 738 states and 1006 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:15,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:22:15,554 INFO L93 Difference]: Finished difference Result 1483 states and 2029 transitions. [2021-11-07 02:22:15,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:22:15,555 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-07 02:22:15,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:22:15,562 INFO L225 Difference]: With dead ends: 1483 [2021-11-07 02:22:15,562 INFO L226 Difference]: Without dead ends: 749 [2021-11-07 02:22:15,564 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:22:15,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2021-11-07 02:22:15,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 749. [2021-11-07 02:22:15,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 743 states have (on average 1.3687752355316285) internal successors, (1017), 748 states have internal predecessors, (1017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:15,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 1017 transitions. [2021-11-07 02:22:15,590 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 1017 transitions. Word has length 75 [2021-11-07 02:22:15,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:22:15,591 INFO L470 AbstractCegarLoop]: Abstraction has 749 states and 1017 transitions. [2021-11-07 02:22:15,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:15,591 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 1017 transitions. [2021-11-07 02:22:15,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-07 02:22:15,593 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:22:15,593 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:22:15,630 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 02:22:15,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:22:15,812 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:22:15,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:22:15,813 INFO L85 PathProgramCache]: Analyzing trace with hash 666463611, now seen corresponding path program 1 times [2021-11-07 02:22:15,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:22:15,816 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1138554675] [2021-11-07 02:22:15,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:22:15,816 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:22:15,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:22:15,817 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:22:15,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 02:22:16,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:22:17,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 971 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:22:17,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:22:17,571 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 02:22:17,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:22:18,301 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 02:22:18,302 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:22:18,302 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1138554675] [2021-11-07 02:22:18,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1138554675] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:22:18,302 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [16314757] [2021-11-07 02:22:18,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:22:18,303 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:22:18,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:22:18,319 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:22:18,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-11-07 02:22:19,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:22:19,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 971 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:22:19,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:22:19,565 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 02:22:19,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:22:19,932 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 02:22:19,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [16314757] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:22:19,932 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:22:19,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-07 02:22:19,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635861855] [2021-11-07 02:22:19,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:22:19,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:22:19,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:22:19,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:22:19,935 INFO L87 Difference]: Start difference. First operand 749 states and 1017 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:20,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:22:20,199 INFO L93 Difference]: Finished difference Result 1494 states and 2036 transitions. [2021-11-07 02:22:20,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:22:20,200 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-07 02:22:20,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:22:20,206 INFO L225 Difference]: With dead ends: 1494 [2021-11-07 02:22:20,206 INFO L226 Difference]: Without dead ends: 770 [2021-11-07 02:22:20,207 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 317 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:22:20,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2021-11-07 02:22:20,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 767. [2021-11-07 02:22:20,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 767 states, 761 states have (on average 1.3718791064388962) internal successors, (1044), 766 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:20,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 767 states to 767 states and 1044 transitions. [2021-11-07 02:22:20,232 INFO L78 Accepts]: Start accepts. Automaton has 767 states and 1044 transitions. Word has length 82 [2021-11-07 02:22:20,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:22:20,232 INFO L470 AbstractCegarLoop]: Abstraction has 767 states and 1044 transitions. [2021-11-07 02:22:20,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:20,233 INFO L276 IsEmpty]: Start isEmpty. Operand 767 states and 1044 transitions. [2021-11-07 02:22:20,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-07 02:22:20,235 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:22:20,235 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 02:22:20,274 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 02:22:20,464 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-11-07 02:22:20,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:22:20,651 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:22:20,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:22:20,652 INFO L85 PathProgramCache]: Analyzing trace with hash -981903299, now seen corresponding path program 1 times [2021-11-07 02:22:20,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:22:20,655 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1968754701] [2021-11-07 02:22:20,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:22:20,655 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:22:20,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:22:20,658 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:22:20,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 02:22:21,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:22:21,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 1084 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:22:21,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:22:22,530 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 02:22:22,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:22:23,319 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 02:22:23,319 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:22:23,319 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1968754701] [2021-11-07 02:22:23,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1968754701] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:22:23,319 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2047457896] [2021-11-07 02:22:23,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:22:23,320 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:22:23,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:22:23,322 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:22:23,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-07 02:22:24,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:22:24,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 1084 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:22:24,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:22:24,575 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-07 02:22:24,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:22:24,793 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-07 02:22:24,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2047457896] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:22:24,793 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:22:24,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-07 02:22:24,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301296605] [2021-11-07 02:22:24,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:22:24,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:22:24,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:22:24,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:22:24,795 INFO L87 Difference]: Start difference. First operand 767 states and 1044 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:24,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:22:24,906 INFO L93 Difference]: Finished difference Result 1511 states and 2062 transitions. [2021-11-07 02:22:24,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:22:24,908 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2021-11-07 02:22:24,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:22:24,914 INFO L225 Difference]: With dead ends: 1511 [2021-11-07 02:22:24,914 INFO L226 Difference]: Without dead ends: 769 [2021-11-07 02:22:24,916 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 421 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:22:24,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 769 states. [2021-11-07 02:22:24,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 769 to 769. [2021-11-07 02:22:24,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 769 states, 763 states have (on average 1.3709043250327655) internal successors, (1046), 768 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:24,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 769 states to 769 states and 1046 transitions. [2021-11-07 02:22:24,939 INFO L78 Accepts]: Start accepts. Automaton has 769 states and 1046 transitions. Word has length 108 [2021-11-07 02:22:24,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:22:24,941 INFO L470 AbstractCegarLoop]: Abstraction has 769 states and 1046 transitions. [2021-11-07 02:22:24,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:24,941 INFO L276 IsEmpty]: Start isEmpty. Operand 769 states and 1046 transitions. [2021-11-07 02:22:24,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-07 02:22:24,949 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:22:24,949 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 02:22:24,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 02:22:25,169 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-11-07 02:22:25,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:22:25,364 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:22:25,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:22:25,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1374930309, now seen corresponding path program 1 times [2021-11-07 02:22:25,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:22:25,368 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [536043013] [2021-11-07 02:22:25,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:22:25,368 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:22:25,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:22:25,369 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:22:25,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 02:22:26,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:22:26,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 1086 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:22:26,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:22:27,240 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 02:22:27,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:22:27,953 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 02:22:27,954 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:22:27,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [536043013] [2021-11-07 02:22:27,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [536043013] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:22:27,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2083197223] [2021-11-07 02:22:27,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:22:27,955 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:22:27,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:22:27,956 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:22:27,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-07 02:22:28,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:22:28,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 1086 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:22:28,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:22:29,191 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-07 02:22:29,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:22:29,391 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-07 02:22:29,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2083197223] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:22:29,392 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:22:29,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-07 02:22:29,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861560948] [2021-11-07 02:22:29,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:22:29,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:22:29,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:22:29,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:22:29,394 INFO L87 Difference]: Start difference. First operand 769 states and 1046 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:29,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:22:29,992 INFO L93 Difference]: Finished difference Result 2143 states and 2946 transitions. [2021-11-07 02:22:29,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:22:29,993 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2021-11-07 02:22:29,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:22:30,008 INFO L225 Difference]: With dead ends: 2143 [2021-11-07 02:22:30,008 INFO L226 Difference]: Without dead ends: 1399 [2021-11-07 02:22:30,010 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 421 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:22:30,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1399 states. [2021-11-07 02:22:30,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1399 to 805. [2021-11-07 02:22:30,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 805 states, 799 states have (on average 1.3692115143929913) internal successors, (1094), 804 states have internal predecessors, (1094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:30,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 805 states to 805 states and 1094 transitions. [2021-11-07 02:22:30,042 INFO L78 Accepts]: Start accepts. Automaton has 805 states and 1094 transitions. Word has length 108 [2021-11-07 02:22:30,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:22:30,044 INFO L470 AbstractCegarLoop]: Abstraction has 805 states and 1094 transitions. [2021-11-07 02:22:30,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:30,044 INFO L276 IsEmpty]: Start isEmpty. Operand 805 states and 1094 transitions. [2021-11-07 02:22:30,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-07 02:22:30,047 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:22:30,047 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:22:30,060 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-11-07 02:22:30,286 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-07 02:22:30,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:22:30,464 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:22:30,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:22:30,464 INFO L85 PathProgramCache]: Analyzing trace with hash 419488898, now seen corresponding path program 1 times [2021-11-07 02:22:30,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:22:30,467 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1849023656] [2021-11-07 02:22:30,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:22:30,467 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:22:30,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:22:30,470 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:22:30,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 02:22:31,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:22:31,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 1116 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:22:31,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:22:32,405 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:22:32,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:22:33,141 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:22:33,141 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:22:33,141 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1849023656] [2021-11-07 02:22:33,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1849023656] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:22:33,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [45868042] [2021-11-07 02:22:33,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:22:33,142 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:22:33,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:22:33,156 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:22:33,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-07 02:22:34,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:22:34,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 1116 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:22:34,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:22:34,821 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:22:34,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:22:35,316 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:22:35,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [45868042] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:22:35,317 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:22:35,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 10 [2021-11-07 02:22:35,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615766641] [2021-11-07 02:22:35,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:22:35,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:22:35,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:22:35,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:22:35,320 INFO L87 Difference]: Start difference. First operand 805 states and 1094 transitions. Second operand has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:37,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:22:37,662 INFO L93 Difference]: Finished difference Result 1651 states and 2266 transitions. [2021-11-07 02:22:37,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:22:37,664 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2021-11-07 02:22:37,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:22:37,669 INFO L225 Difference]: With dead ends: 1651 [2021-11-07 02:22:37,670 INFO L226 Difference]: Without dead ends: 871 [2021-11-07 02:22:37,671 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 464 GetRequests, 456 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:22:37,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2021-11-07 02:22:37,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 865. [2021-11-07 02:22:37,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 865 states, 859 states have (on average 1.378346915017462) internal successors, (1184), 864 states have internal predecessors, (1184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:37,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 865 states to 865 states and 1184 transitions. [2021-11-07 02:22:37,706 INFO L78 Accepts]: Start accepts. Automaton has 865 states and 1184 transitions. Word has length 117 [2021-11-07 02:22:37,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:22:37,707 INFO L470 AbstractCegarLoop]: Abstraction has 865 states and 1184 transitions. [2021-11-07 02:22:37,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:37,707 INFO L276 IsEmpty]: Start isEmpty. Operand 865 states and 1184 transitions. [2021-11-07 02:22:37,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-07 02:22:37,710 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:22:37,710 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 02:22:37,724 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-07 02:22:37,956 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 02:22:38,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:22:38,125 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:22:38,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:22:38,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1517015016, now seen corresponding path program 1 times [2021-11-07 02:22:38,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:22:38,127 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [728728890] [2021-11-07 02:22:38,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:22:38,127 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:22:38,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:22:38,129 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:22:38,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 02:22:39,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:22:39,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 1151 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:22:39,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:22:40,476 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-07 02:22:40,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:22:41,268 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-07 02:22:41,269 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:22:41,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [728728890] [2021-11-07 02:22:41,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [728728890] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:22:41,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [238057604] [2021-11-07 02:22:41,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:22:41,269 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:22:41,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:22:41,270 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:22:41,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-07 02:22:42,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:22:42,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 1151 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:22:42,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:22:42,990 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-07 02:22:42,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:22:43,363 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-07 02:22:43,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [238057604] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:22:43,363 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:22:43,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-07 02:22:43,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739609013] [2021-11-07 02:22:43,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:22:43,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:22:43,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:22:43,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:22:43,365 INFO L87 Difference]: Start difference. First operand 865 states and 1184 transitions. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:43,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:22:43,433 INFO L93 Difference]: Finished difference Result 2543 states and 3489 transitions. [2021-11-07 02:22:43,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:22:43,434 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 131 [2021-11-07 02:22:43,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:22:43,445 INFO L225 Difference]: With dead ends: 2543 [2021-11-07 02:22:43,445 INFO L226 Difference]: Without dead ends: 1703 [2021-11-07 02:22:43,447 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 520 GetRequests, 513 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:22:43,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1703 states. [2021-11-07 02:22:43,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1703 to 866. [2021-11-07 02:22:43,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 860 states have (on average 1.377906976744186) internal successors, (1185), 865 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:43,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 1185 transitions. [2021-11-07 02:22:43,481 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 1185 transitions. Word has length 131 [2021-11-07 02:22:43,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:22:43,481 INFO L470 AbstractCegarLoop]: Abstraction has 866 states and 1185 transitions. [2021-11-07 02:22:43,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:43,482 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 1185 transitions. [2021-11-07 02:22:43,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-07 02:22:43,485 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:22:43,485 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 02:22:43,517 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 02:22:43,702 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-07 02:22:43,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:22:43,896 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:22:43,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:22:43,897 INFO L85 PathProgramCache]: Analyzing trace with hash -2009641190, now seen corresponding path program 1 times [2021-11-07 02:22:43,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:22:43,898 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [320045173] [2021-11-07 02:22:43,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:22:43,898 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:22:43,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:22:43,899 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:22:43,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 02:22:45,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:22:45,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 1151 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:22:45,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:22:46,125 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-07 02:22:46,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:22:46,892 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-07 02:22:46,892 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:22:46,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [320045173] [2021-11-07 02:22:46,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [320045173] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:22:46,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1792452380] [2021-11-07 02:22:46,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:22:46,893 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:22:46,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:22:46,893 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:22:46,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-07 02:22:48,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:22:48,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 1151 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:22:48,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:22:48,757 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-07 02:22:48,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:22:49,283 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-07 02:22:49,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1792452380] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:22:49,284 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:22:49,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 14 [2021-11-07 02:22:49,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887150727] [2021-11-07 02:22:49,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:22:49,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:22:49,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:22:49,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-11-07 02:22:49,285 INFO L87 Difference]: Start difference. First operand 866 states and 1185 transitions. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:53,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:22:53,471 INFO L93 Difference]: Finished difference Result 2901 states and 4024 transitions. [2021-11-07 02:22:53,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 02:22:53,472 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 131 [2021-11-07 02:22:53,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:22:53,485 INFO L225 Difference]: With dead ends: 2901 [2021-11-07 02:22:53,485 INFO L226 Difference]: Without dead ends: 2060 [2021-11-07 02:22:53,487 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 526 GetRequests, 511 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-11-07 02:22:53,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2060 states. [2021-11-07 02:22:53,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2060 to 872. [2021-11-07 02:22:53,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 872 states, 866 states have (on average 1.3752886836027713) internal successors, (1191), 871 states have internal predecessors, (1191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:53,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 1191 transitions. [2021-11-07 02:22:53,571 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 1191 transitions. Word has length 131 [2021-11-07 02:22:53,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:22:53,572 INFO L470 AbstractCegarLoop]: Abstraction has 872 states and 1191 transitions. [2021-11-07 02:22:53,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:53,572 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 1191 transitions. [2021-11-07 02:22:53,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-07 02:22:53,575 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:22:53,575 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 02:22:53,589 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-07 02:22:53,812 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 02:22:53,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:22:53,984 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:22:53,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:22:53,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1172759423, now seen corresponding path program 1 times [2021-11-07 02:22:53,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:22:53,985 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [442838013] [2021-11-07 02:22:53,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:22:53,986 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:22:53,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:22:53,987 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:22:53,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 02:22:55,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:22:55,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 1162 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:22:55,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:22:56,274 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-07 02:22:56,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:22:57,071 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-07 02:22:57,071 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:22:57,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [442838013] [2021-11-07 02:22:57,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [442838013] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:22:57,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [622837354] [2021-11-07 02:22:57,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:22:57,072 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:22:57,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:22:57,073 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:22:57,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-07 02:22:58,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:22:58,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 1162 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 02:22:58,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:22:59,119 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-07 02:22:59,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:22:59,578 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-07 02:22:59,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [622837354] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:22:59,579 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:22:59,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 14 [2021-11-07 02:22:59,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395283796] [2021-11-07 02:22:59,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:22:59,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:22:59,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:22:59,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-11-07 02:22:59,581 INFO L87 Difference]: Start difference. First operand 872 states and 1191 transitions. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:04,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:23:04,513 INFO L93 Difference]: Finished difference Result 4495 states and 6222 transitions. [2021-11-07 02:23:04,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-07 02:23:04,514 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 132 [2021-11-07 02:23:04,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:23:04,537 INFO L225 Difference]: With dead ends: 4495 [2021-11-07 02:23:04,537 INFO L226 Difference]: Without dead ends: 3648 [2021-11-07 02:23:04,541 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 544 GetRequests, 522 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2021-11-07 02:23:04,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3648 states. [2021-11-07 02:23:04,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3648 to 878. [2021-11-07 02:23:04,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 878 states, 872 states have (on average 1.3727064220183487) internal successors, (1197), 877 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:04,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 1197 transitions. [2021-11-07 02:23:04,596 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 1197 transitions. Word has length 132 [2021-11-07 02:23:04,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:23:04,597 INFO L470 AbstractCegarLoop]: Abstraction has 878 states and 1197 transitions. [2021-11-07 02:23:04,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:04,597 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 1197 transitions. [2021-11-07 02:23:04,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-07 02:23:04,600 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:23:04,601 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 02:23:04,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-07 02:23:04,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 02:23:05,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:23:05,009 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:23:05,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:23:05,010 INFO L85 PathProgramCache]: Analyzing trace with hash 699360723, now seen corresponding path program 1 times [2021-11-07 02:23:05,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:23:05,011 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1866262365] [2021-11-07 02:23:05,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:23:05,011 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:23:05,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:23:05,012 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:23:05,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 02:23:06,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:23:06,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 1173 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:23:06,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:23:07,434 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-07 02:23:07,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:23:08,192 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-07 02:23:08,192 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:23:08,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1866262365] [2021-11-07 02:23:08,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1866262365] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:23:08,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2025377089] [2021-11-07 02:23:08,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:23:08,193 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:23:08,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:23:08,194 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:23:08,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-07 02:23:09,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:23:09,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 1173 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:23:09,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:23:10,276 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-07 02:23:10,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:23:10,631 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-07 02:23:10,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2025377089] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:23:10,632 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:23:10,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-07 02:23:10,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255243035] [2021-11-07 02:23:10,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:23:10,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:23:10,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:23:10,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:23:10,634 INFO L87 Difference]: Start difference. First operand 878 states and 1197 transitions. Second operand has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:10,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:23:10,764 INFO L93 Difference]: Finished difference Result 1876 states and 2577 transitions. [2021-11-07 02:23:10,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:23:10,767 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 133 [2021-11-07 02:23:10,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:23:10,773 INFO L225 Difference]: With dead ends: 1876 [2021-11-07 02:23:10,773 INFO L226 Difference]: Without dead ends: 1023 [2021-11-07 02:23:10,775 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 528 GetRequests, 520 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:23:10,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1023 states. [2021-11-07 02:23:10,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1023 to 880. [2021-11-07 02:23:10,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 880 states, 874 states have (on average 1.3718535469107551) internal successors, (1199), 879 states have internal predecessors, (1199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:10,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 1199 transitions. [2021-11-07 02:23:10,809 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 1199 transitions. Word has length 133 [2021-11-07 02:23:10,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:23:10,809 INFO L470 AbstractCegarLoop]: Abstraction has 880 states and 1199 transitions. [2021-11-07 02:23:10,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:10,810 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 1199 transitions. [2021-11-07 02:23:10,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-07 02:23:10,813 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:23:10,813 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 02:23:10,846 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-11-07 02:23:11,035 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-11-07 02:23:11,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:23:11,228 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:23:11,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:23:11,229 INFO L85 PathProgramCache]: Analyzing trace with hash 218280465, now seen corresponding path program 1 times [2021-11-07 02:23:11,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:23:11,230 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [670858620] [2021-11-07 02:23:11,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:23:11,230 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:23:11,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:23:11,231 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:23:11,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 02:23:13,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:23:13,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 1173 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:23:13,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:23:13,862 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-07 02:23:13,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:23:14,677 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-07 02:23:14,678 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:23:14,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [670858620] [2021-11-07 02:23:14,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [670858620] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:23:14,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [505388600] [2021-11-07 02:23:14,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:23:14,678 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:23:14,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:23:14,679 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:23:14,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-07 02:23:16,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:23:16,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 1173 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:23:16,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:23:17,019 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-07 02:23:17,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:23:17,468 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-07 02:23:17,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [505388600] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:23:17,468 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:23:17,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 12 [2021-11-07 02:23:17,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228180684] [2021-11-07 02:23:17,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:23:17,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:23:17,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:23:17,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-11-07 02:23:17,471 INFO L87 Difference]: Start difference. First operand 880 states and 1199 transitions. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:17,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:23:17,683 INFO L93 Difference]: Finished difference Result 2059 states and 2838 transitions. [2021-11-07 02:23:17,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:23:17,684 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 133 [2021-11-07 02:23:17,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:23:17,689 INFO L225 Difference]: With dead ends: 2059 [2021-11-07 02:23:17,689 INFO L226 Difference]: Without dead ends: 1204 [2021-11-07 02:23:17,691 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 530 GetRequests, 519 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-11-07 02:23:17,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1204 states. [2021-11-07 02:23:17,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1204 to 880. [2021-11-07 02:23:17,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 880 states, 874 states have (on average 1.3672768878718535) internal successors, (1195), 879 states have internal predecessors, (1195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:17,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 1195 transitions. [2021-11-07 02:23:17,738 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 1195 transitions. Word has length 133 [2021-11-07 02:23:17,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:23:17,738 INFO L470 AbstractCegarLoop]: Abstraction has 880 states and 1195 transitions. [2021-11-07 02:23:17,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:17,739 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 1195 transitions. [2021-11-07 02:23:17,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-07 02:23:17,741 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:23:17,742 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 02:23:17,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-07 02:23:17,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-07 02:23:18,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:23:18,151 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:23:18,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:23:18,152 INFO L85 PathProgramCache]: Analyzing trace with hash 244580899, now seen corresponding path program 1 times [2021-11-07 02:23:18,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:23:18,153 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1119985682] [2021-11-07 02:23:18,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:23:18,153 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:23:18,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:23:18,154 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:23:18,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-07 02:23:20,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:23:20,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 1206 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:23:20,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:23:20,966 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-07 02:23:20,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:23:21,804 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-07 02:23:21,804 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:23:21,804 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1119985682] [2021-11-07 02:23:21,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1119985682] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:23:21,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [388655947] [2021-11-07 02:23:21,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:23:21,805 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:23:21,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:23:21,806 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:23:21,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-07 02:23:23,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:23:23,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 1206 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:23:23,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:23:24,240 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-07 02:23:24,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:23:24,725 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-07 02:23:24,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [388655947] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:23:24,726 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:23:24,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 12 [2021-11-07 02:23:24,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785074579] [2021-11-07 02:23:24,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:23:24,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:23:24,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:23:24,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-11-07 02:23:24,728 INFO L87 Difference]: Start difference. First operand 880 states and 1195 transitions. Second operand has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 6 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:26,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:23:26,353 INFO L93 Difference]: Finished difference Result 2268 states and 3129 transitions. [2021-11-07 02:23:26,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:23:26,358 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 6 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-11-07 02:23:26,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:23:26,366 INFO L225 Difference]: With dead ends: 2268 [2021-11-07 02:23:26,366 INFO L226 Difference]: Without dead ends: 1413 [2021-11-07 02:23:26,368 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 558 GetRequests, 547 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-11-07 02:23:26,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1413 states. [2021-11-07 02:23:26,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1413 to 884. [2021-11-07 02:23:26,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 878 states have (on average 1.3656036446469249) internal successors, (1199), 883 states have internal predecessors, (1199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:26,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 1199 transitions. [2021-11-07 02:23:26,427 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 1199 transitions. Word has length 140 [2021-11-07 02:23:26,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:23:26,427 INFO L470 AbstractCegarLoop]: Abstraction has 884 states and 1199 transitions. [2021-11-07 02:23:26,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 6 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:26,428 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 1199 transitions. [2021-11-07 02:23:26,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-07 02:23:26,430 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:23:26,431 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 02:23:26,476 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-07 02:23:26,660 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-11-07 02:23:26,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:23:26,852 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:23:26,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:23:26,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1619556914, now seen corresponding path program 1 times [2021-11-07 02:23:26,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:23:26,861 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [494004772] [2021-11-07 02:23:26,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:23:26,861 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:23:26,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:23:26,862 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:23:26,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-07 02:23:28,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:23:29,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 1213 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:23:29,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:23:29,685 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-07 02:23:29,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:23:30,559 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-07 02:23:30,559 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:23:30,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [494004772] [2021-11-07 02:23:30,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [494004772] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:23:30,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [32241491] [2021-11-07 02:23:30,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:23:30,560 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:23:30,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:23:30,561 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:23:30,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-11-07 02:23:32,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:23:32,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 1213 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 02:23:32,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:23:33,233 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-07 02:23:33,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:23:33,747 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-07 02:23:33,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [32241491] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:23:33,747 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:23:33,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 14 [2021-11-07 02:23:33,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051703082] [2021-11-07 02:23:33,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:23:33,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:23:33,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:23:33,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-11-07 02:23:33,749 INFO L87 Difference]: Start difference. First operand 884 states and 1199 transitions. Second operand has 8 states, 8 states have (on average 18.375) internal successors, (147), 8 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:38,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:23:38,300 INFO L93 Difference]: Finished difference Result 3637 states and 5056 transitions. [2021-11-07 02:23:38,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-07 02:23:38,301 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 18.375) internal successors, (147), 8 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2021-11-07 02:23:38,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:23:38,313 INFO L225 Difference]: With dead ends: 3637 [2021-11-07 02:23:38,313 INFO L226 Difference]: Without dead ends: 2778 [2021-11-07 02:23:38,315 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 588 GetRequests, 566 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2021-11-07 02:23:38,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2778 states. [2021-11-07 02:23:38,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2778 to 890. [2021-11-07 02:23:38,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 890 states, 884 states have (on average 1.3631221719457014) internal successors, (1205), 889 states have internal predecessors, (1205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:38,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 1205 transitions. [2021-11-07 02:23:38,420 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 1205 transitions. Word has length 143 [2021-11-07 02:23:38,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:23:38,421 INFO L470 AbstractCegarLoop]: Abstraction has 890 states and 1205 transitions. [2021-11-07 02:23:38,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.375) internal successors, (147), 8 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:38,421 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 1205 transitions. [2021-11-07 02:23:38,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-07 02:23:38,424 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:23:38,425 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 02:23:38,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2021-11-07 02:23:38,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-07 02:23:38,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:23:38,835 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:23:38,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:23:38,835 INFO L85 PathProgramCache]: Analyzing trace with hash -30730644, now seen corresponding path program 1 times [2021-11-07 02:23:38,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:23:38,837 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1879160607] [2021-11-07 02:23:38,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:23:38,837 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:23:38,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:23:38,838 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:23:38,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-07 02:23:41,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:23:41,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 1224 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:23:41,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:23:41,753 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-07 02:23:41,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:23:42,633 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-07 02:23:42,633 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:23:42,633 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1879160607] [2021-11-07 02:23:42,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1879160607] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:23:42,633 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [257664276] [2021-11-07 02:23:42,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:23:42,633 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:23:42,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:23:42,634 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:23:42,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-11-07 02:23:44,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:23:44,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 1224 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:23:44,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:23:45,409 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-07 02:23:45,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:23:45,855 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-07 02:23:45,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [257664276] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:23:45,856 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:23:45,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 10 [2021-11-07 02:23:45,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409452134] [2021-11-07 02:23:45,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:23:45,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:23:45,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:23:45,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:23:45,857 INFO L87 Difference]: Start difference. First operand 890 states and 1205 transitions. Second operand has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:45,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:23:45,939 INFO L93 Difference]: Finished difference Result 1763 states and 2392 transitions. [2021-11-07 02:23:45,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:23:45,939 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 144 [2021-11-07 02:23:45,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:23:45,943 INFO L225 Difference]: With dead ends: 1763 [2021-11-07 02:23:45,943 INFO L226 Difference]: Without dead ends: 898 [2021-11-07 02:23:45,945 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 572 GetRequests, 564 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:23:45,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2021-11-07 02:23:45,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 898. [2021-11-07 02:23:45,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 898 states, 892 states have (on average 1.359865470852018) internal successors, (1213), 897 states have internal predecessors, (1213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:45,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 1213 transitions. [2021-11-07 02:23:45,998 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 1213 transitions. Word has length 144 [2021-11-07 02:23:45,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:23:45,998 INFO L470 AbstractCegarLoop]: Abstraction has 898 states and 1213 transitions. [2021-11-07 02:23:45,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:45,999 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 1213 transitions. [2021-11-07 02:23:46,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-07 02:23:46,002 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:23:46,002 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-11-07 02:23:46,045 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-07 02:23:46,232 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2021-11-07 02:23:46,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:23:46,424 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:23:46,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:23:46,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1721605430, now seen corresponding path program 1 times [2021-11-07 02:23:46,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:23:46,426 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1476286402] [2021-11-07 02:23:46,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:23:46,427 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:23:46,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:23:46,429 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:23:46,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-07 02:23:48,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:23:48,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 1236 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:23:48,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:23:49,448 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-07 02:23:49,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:23:50,252 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-07 02:23:50,252 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:23:50,252 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1476286402] [2021-11-07 02:23:50,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1476286402] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:23:50,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [811096144] [2021-11-07 02:23:50,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:23:50,253 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:23:50,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:23:50,254 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:23:50,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-11-07 02:23:53,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:23:53,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 1236 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:23:53,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:23:54,281 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-07 02:23:54,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:23:54,827 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-07 02:23:54,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [811096144] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:23:54,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540818047] [2021-11-07 02:23:54,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:23:54,827 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:23:54,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:23:54,828 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:23:54,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-07 02:23:57,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:23:57,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 1236 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:23:57,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:23:57,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 73 [2021-11-07 02:23:57,666 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-07 02:23:57,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:23:57,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 86 [2021-11-07 02:23:58,844 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-07 02:23:58,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540818047] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:23:58,844 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-11-07 02:23:58,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5, 5, 5] total 12 [2021-11-07 02:23:58,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375573378] [2021-11-07 02:23:58,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:23:58,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:23:58,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:23:58,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-11-07 02:23:58,846 INFO L87 Difference]: Start difference. First operand 898 states and 1213 transitions. Second operand has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:59,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:23:59,274 INFO L93 Difference]: Finished difference Result 1964 states and 2669 transitions. [2021-11-07 02:23:59,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:23:59,276 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 148 [2021-11-07 02:23:59,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:23:59,282 INFO L225 Difference]: With dead ends: 1964 [2021-11-07 02:23:59,282 INFO L226 Difference]: Without dead ends: 1091 [2021-11-07 02:23:59,285 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 883 GetRequests, 872 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-11-07 02:23:59,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1091 states. [2021-11-07 02:23:59,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1091 to 902. [2021-11-07 02:23:59,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 896 states have (on average 1.3582589285714286) internal successors, (1217), 901 states have internal predecessors, (1217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:59,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 1217 transitions. [2021-11-07 02:23:59,349 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 1217 transitions. Word has length 148 [2021-11-07 02:23:59,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:23:59,349 INFO L470 AbstractCegarLoop]: Abstraction has 902 states and 1217 transitions. [2021-11-07 02:23:59,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:59,349 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 1217 transitions. [2021-11-07 02:23:59,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-07 02:23:59,352 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:23:59,353 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:23:59,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-07 02:23:59,600 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2021-11-07 02:23:59,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-07 02:23:59,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:23:59,977 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:23:59,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:23:59,977 INFO L85 PathProgramCache]: Analyzing trace with hash 582096612, now seen corresponding path program 1 times [2021-11-07 02:23:59,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:23:59,978 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [46543610] [2021-11-07 02:23:59,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:23:59,978 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:23:59,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:23:59,979 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:23:59,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-07 02:24:02,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:24:02,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 1239 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:24:02,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:24:03,289 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-07 02:24:03,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:24:04,091 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-07 02:24:04,091 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:24:04,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [46543610] [2021-11-07 02:24:04,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [46543610] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:24:04,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2092383265] [2021-11-07 02:24:04,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:24:04,092 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:24:04,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:24:04,093 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:24:04,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2021-11-07 02:24:06,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:24:06,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 1239 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:24:06,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:24:07,264 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-07 02:24:07,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:24:07,775 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-07 02:24:07,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2092383265] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:24:07,775 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:24:07,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 14 [2021-11-07 02:24:07,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542844126] [2021-11-07 02:24:07,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:24:07,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:24:07,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:24:07,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-11-07 02:24:07,778 INFO L87 Difference]: Start difference. First operand 902 states and 1217 transitions. Second operand has 8 states, 8 states have (on average 18.0) internal successors, (144), 8 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:11,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:24:11,752 INFO L93 Difference]: Finished difference Result 3308 states and 4543 transitions. [2021-11-07 02:24:11,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 02:24:11,753 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 18.0) internal successors, (144), 8 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 149 [2021-11-07 02:24:11,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:24:11,764 INFO L225 Difference]: With dead ends: 3308 [2021-11-07 02:24:11,764 INFO L226 Difference]: Without dead ends: 2431 [2021-11-07 02:24:11,765 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 606 GetRequests, 587 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-11-07 02:24:11,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2431 states. [2021-11-07 02:24:11,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2431 to 908. [2021-11-07 02:24:11,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 908 states, 902 states have (on average 1.3558758314855877) internal successors, (1223), 907 states have internal predecessors, (1223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:11,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 908 states to 908 states and 1223 transitions. [2021-11-07 02:24:11,832 INFO L78 Accepts]: Start accepts. Automaton has 908 states and 1223 transitions. Word has length 149 [2021-11-07 02:24:11,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:24:11,833 INFO L470 AbstractCegarLoop]: Abstraction has 908 states and 1223 transitions. [2021-11-07 02:24:11,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.0) internal successors, (144), 8 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:11,833 INFO L276 IsEmpty]: Start isEmpty. Operand 908 states and 1223 transitions. [2021-11-07 02:24:11,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-07 02:24:11,836 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:24:11,837 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:24:11,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2021-11-07 02:24:12,092 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-07 02:24:12,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:24:12,260 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:24:12,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:24:12,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1250593419, now seen corresponding path program 1 times [2021-11-07 02:24:12,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:24:12,262 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1447857141] [2021-11-07 02:24:12,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:24:12,262 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:24:12,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:24:12,263 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:24:12,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-07 02:24:14,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:24:14,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 1250 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:24:14,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:24:15,593 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-07 02:24:15,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:24:16,361 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-07 02:24:16,361 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:24:16,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1447857141] [2021-11-07 02:24:16,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1447857141] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:24:16,362 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1514927115] [2021-11-07 02:24:16,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:24:16,362 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:24:16,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:24:16,363 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:24:16,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2021-11-07 02:24:20,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:24:20,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 1250 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:24:20,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:24:20,723 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-07 02:24:20,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:24:21,295 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-07 02:24:21,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1514927115] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:24:21,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954424998] [2021-11-07 02:24:21,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:24:21,295 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:24:21,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:24:21,300 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:24:21,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-07 02:24:24,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:24:24,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 1250 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:24:24,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:24:24,879 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-07 02:24:24,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:24:25,539 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-07 02:24:25,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954424998] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:24:25,540 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 02:24:25,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 14 [2021-11-07 02:24:25,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055357600] [2021-11-07 02:24:25,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-07 02:24:25,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:24:25,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-07 02:24:25,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-11-07 02:24:25,542 INFO L87 Difference]: Start difference. First operand 908 states and 1223 transitions. Second operand has 14 states, 14 states have (on average 15.5) internal successors, (217), 14 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:28,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:24:28,795 INFO L93 Difference]: Finished difference Result 1982 states and 2703 transitions. [2021-11-07 02:24:28,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-07 02:24:28,796 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 15.5) internal successors, (217), 14 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-11-07 02:24:28,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:24:28,800 INFO L225 Difference]: With dead ends: 1982 [2021-11-07 02:24:28,800 INFO L226 Difference]: Without dead ends: 1080 [2021-11-07 02:24:28,802 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 903 GetRequests, 883 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2021-11-07 02:24:28,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1080 states. [2021-11-07 02:24:28,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1080 to 942. [2021-11-07 02:24:28,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 942 states, 936 states have (on average 1.3429487179487178) internal successors, (1257), 941 states have internal predecessors, (1257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:28,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 942 states to 942 states and 1257 transitions. [2021-11-07 02:24:28,903 INFO L78 Accepts]: Start accepts. Automaton has 942 states and 1257 transitions. Word has length 150 [2021-11-07 02:24:28,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:24:28,904 INFO L470 AbstractCegarLoop]: Abstraction has 942 states and 1257 transitions. [2021-11-07 02:24:28,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 15.5) internal successors, (217), 14 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:28,904 INFO L276 IsEmpty]: Start isEmpty. Operand 942 states and 1257 transitions. [2021-11-07 02:24:28,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-11-07 02:24:28,907 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:24:28,907 INFO L513 BasicCegarLoop]: trace histogram [7, 6, 4, 4, 3, 3, 3, 3, 3, 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] [2021-11-07 02:24:28,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-11-07 02:24:29,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (34)] Forceful destruction successful, exit code 0 [2021-11-07 02:24:29,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-07 02:24:29,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:24:29,526 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:24:29,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:24:29,527 INFO L85 PathProgramCache]: Analyzing trace with hash -20977207, now seen corresponding path program 2 times [2021-11-07 02:24:29,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:24:29,528 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1473325359] [2021-11-07 02:24:29,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 02:24:29,528 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:24:29,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:24:29,529 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:24:29,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-11-07 02:25:00,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 02:25:00,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:25:00,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 1324 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:25:00,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:25:01,354 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-11-07 02:25:01,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:25:02,339 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-11-07 02:25:02,339 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:25:02,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1473325359] [2021-11-07 02:25:02,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1473325359] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:25:02,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1687253911] [2021-11-07 02:25:02,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 02:25:02,340 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:25:02,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:25:02,340 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:25:02,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0a4a93-6a99-4aa2-9d27-8b948f99ad7d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process