./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e18c367-2ef9-4b38-9298-dd06bf4cf7d7/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e18c367-2ef9-4b38-9298-dd06bf4cf7d7/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e18c367-2ef9-4b38-9298-dd06bf4cf7d7/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e18c367-2ef9-4b38-9298-dd06bf4cf7d7/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e18c367-2ef9-4b38-9298-dd06bf4cf7d7/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e18c367-2ef9-4b38-9298-dd06bf4cf7d7/bin/utaipan-aC7eJsxGYH --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 f78e25bf76e2d1d395e5e41868c5ddb628a36f1efdf095bb509ea6a3a366617b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 05:33:59,686 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 05:33:59,689 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 05:33:59,736 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 05:33:59,736 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 05:33:59,738 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 05:33:59,739 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 05:33:59,742 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 05:33:59,744 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 05:33:59,745 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 05:33:59,746 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 05:33:59,748 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 05:33:59,748 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 05:33:59,750 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 05:33:59,751 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 05:33:59,753 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 05:33:59,754 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 05:33:59,755 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 05:33:59,757 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 05:33:59,759 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 05:33:59,761 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 05:33:59,763 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 05:33:59,771 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 05:33:59,773 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 05:33:59,776 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 05:33:59,778 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 05:33:59,779 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 05:33:59,781 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 05:33:59,781 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 05:33:59,786 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 05:33:59,789 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 05:33:59,790 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 05:33:59,792 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 05:33:59,793 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 05:33:59,795 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 05:33:59,796 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 05:33:59,796 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 05:33:59,797 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 05:33:59,797 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 05:33:59,798 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 05:33:59,798 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 05:33:59,799 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e18c367-2ef9-4b38-9298-dd06bf4cf7d7/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-03 05:33:59,843 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 05:33:59,843 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 05:33:59,845 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 05:33:59,845 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 05:33:59,845 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 05:33:59,845 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 05:33:59,845 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 05:33:59,846 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 05:33:59,852 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 05:33:59,852 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 05:33:59,853 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 05:33:59,854 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 05:33:59,854 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 05:33:59,854 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 05:33:59,854 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 05:33:59,855 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 05:33:59,856 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 05:33:59,856 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 05:33:59,856 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 05:33:59,856 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 05:33:59,857 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 05:33:59,857 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 05:33:59,857 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 05:33:59,857 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 05:33:59,857 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 05:33:59,858 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 05:33:59,858 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 05:33:59,858 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:33:59,858 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 05:33:59,859 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 05:33:59,859 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 05:33:59,859 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 05:33:59,859 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 05:33:59,860 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 05:33:59,860 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 05:33:59,860 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 05:33:59,860 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_6e18c367-2ef9-4b38-9298-dd06bf4cf7d7/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e18c367-2ef9-4b38-9298-dd06bf4cf7d7/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f78e25bf76e2d1d395e5e41868c5ddb628a36f1efdf095bb509ea6a3a366617b [2021-11-03 05:34:00,166 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 05:34:00,199 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 05:34:00,202 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 05:34:00,204 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 05:34:00,205 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 05:34:00,206 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e18c367-2ef9-4b38-9298-dd06bf4cf7d7/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i [2021-11-03 05:34:00,292 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e18c367-2ef9-4b38-9298-dd06bf4cf7d7/bin/utaipan-aC7eJsxGYH/data/62a8cbf25/a4ceaa5c53d149baa08ba2ec035edcd4/FLAGaa202642d [2021-11-03 05:34:01,141 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 05:34:01,142 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e18c367-2ef9-4b38-9298-dd06bf4cf7d7/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i [2021-11-03 05:34:01,196 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e18c367-2ef9-4b38-9298-dd06bf4cf7d7/bin/utaipan-aC7eJsxGYH/data/62a8cbf25/a4ceaa5c53d149baa08ba2ec035edcd4/FLAGaa202642d [2021-11-03 05:34:01,618 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e18c367-2ef9-4b38-9298-dd06bf4cf7d7/bin/utaipan-aC7eJsxGYH/data/62a8cbf25/a4ceaa5c53d149baa08ba2ec035edcd4 [2021-11-03 05:34:01,620 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 05:34:01,621 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 05:34:01,643 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 05:34:01,644 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 05:34:01,647 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 05:34:01,647 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:34:01" (1/1) ... [2021-11-03 05:34:01,649 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6234554f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:34:01, skipping insertion in model container [2021-11-03 05:34:01,650 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:34:01" (1/1) ... [2021-11-03 05:34:01,657 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 05:34:01,754 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:34:02,846 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_6e18c367-2ef9-4b38-9298-dd06bf4cf7d7/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i[162928,162941] [2021-11-03 05:34:02,999 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-03 05:34:03,005 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-03 05:34:03,046 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-03 05:34:03,062 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-03 05:34:03,082 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-03 05:34:03,153 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-03 05:34:03,154 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-03 05:34:03,192 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-03 05:34:03,292 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-03 05:34:03,293 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-03 05:34:03,298 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-03 05:34:03,299 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-03 05:34:03,300 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-03 05:34:03,301 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-03 05:34:03,301 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-03 05:34:03,302 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-03 05:34:03,348 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-03 05:34:03,374 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:34:03,391 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) [2021-11-03 05:34:03,391 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5e19c8a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:34:03, skipping insertion in model container [2021-11-03 05:34:03,391 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 05:34:03,392 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-03 05:34:03,394 INFO L168 Benchmark]: Toolchain (without parser) took 1771.41 ms. Allocated memory is still 125.8 MB. Free memory was 83.0 MB in the beginning and 49.2 MB in the end (delta: 33.8 MB). Peak memory consumption was 31.5 MB. Max. memory is 16.1 GB. [2021-11-03 05:34:03,395 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 92.3 MB. Free memory is still 47.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 05:34:03,396 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1748.67 ms. Allocated memory is still 125.8 MB. Free memory was 83.0 MB in the beginning and 49.2 MB in the end (delta: 33.8 MB). Peak memory consumption was 31.5 MB. Max. memory is 16.1 GB. [2021-11-03 05:34:03,397 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 92.3 MB. Free memory is still 47.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 1748.67 ms. Allocated memory is still 125.8 MB. Free memory was 83.0 MB in the beginning and 49.2 MB in the end (delta: 33.8 MB). Peak memory consumption was 31.5 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 5540]: 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_6e18c367-2ef9-4b38-9298-dd06bf4cf7d7/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e18c367-2ef9-4b38-9298-dd06bf4cf7d7/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e18c367-2ef9-4b38-9298-dd06bf4cf7d7/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e18c367-2ef9-4b38-9298-dd06bf4cf7d7/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e18c367-2ef9-4b38-9298-dd06bf4cf7d7/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e18c367-2ef9-4b38-9298-dd06bf4cf7d7/bin/utaipan-aC7eJsxGYH --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 f78e25bf76e2d1d395e5e41868c5ddb628a36f1efdf095bb509ea6a3a366617b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 05:34:05,635 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 05:34:05,638 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 05:34:05,707 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 05:34:05,707 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 05:34:05,713 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 05:34:05,715 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 05:34:05,719 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 05:34:05,722 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 05:34:05,730 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 05:34:05,731 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 05:34:05,733 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 05:34:05,734 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 05:34:05,736 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 05:34:05,739 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 05:34:05,745 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 05:34:05,747 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 05:34:05,748 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 05:34:05,750 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 05:34:05,760 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 05:34:05,762 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 05:34:05,764 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 05:34:05,766 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 05:34:05,769 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 05:34:05,773 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 05:34:05,774 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 05:34:05,774 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 05:34:05,780 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 05:34:05,781 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 05:34:05,782 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 05:34:05,782 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 05:34:05,783 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 05:34:05,785 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 05:34:05,785 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 05:34:05,787 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 05:34:05,787 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 05:34:05,788 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 05:34:05,788 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 05:34:05,789 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 05:34:05,791 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 05:34:05,791 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 05:34:05,792 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e18c367-2ef9-4b38-9298-dd06bf4cf7d7/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-03 05:34:05,838 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 05:34:05,838 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 05:34:05,839 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 05:34:05,839 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 05:34:05,840 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 05:34:05,840 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 05:34:05,840 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 05:34:05,840 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 05:34:05,840 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 05:34:05,842 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 05:34:05,843 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 05:34:05,843 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 05:34:05,843 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 05:34:05,844 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 05:34:05,844 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 05:34:05,844 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-03 05:34:05,844 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-03 05:34:05,844 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 05:34:05,845 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 05:34:05,845 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 05:34:05,845 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 05:34:05,845 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-03 05:34:05,845 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 05:34:05,846 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:34:05,846 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 05:34:05,846 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 05:34:05,846 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 05:34:05,846 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-03 05:34:05,847 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-03 05:34:05,847 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 05:34:05,847 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 05:34:05,847 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 05:34:05,847 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_6e18c367-2ef9-4b38-9298-dd06bf4cf7d7/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e18c367-2ef9-4b38-9298-dd06bf4cf7d7/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f78e25bf76e2d1d395e5e41868c5ddb628a36f1efdf095bb509ea6a3a366617b [2021-11-03 05:34:06,249 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 05:34:06,277 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 05:34:06,281 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 05:34:06,282 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 05:34:06,283 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 05:34:06,284 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e18c367-2ef9-4b38-9298-dd06bf4cf7d7/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i [2021-11-03 05:34:06,359 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e18c367-2ef9-4b38-9298-dd06bf4cf7d7/bin/utaipan-aC7eJsxGYH/data/615737b0c/1c9311a891a94c8f9ba73ffc7c19115a/FLAG0871321fd [2021-11-03 05:34:07,279 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 05:34:07,280 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e18c367-2ef9-4b38-9298-dd06bf4cf7d7/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i [2021-11-03 05:34:07,326 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e18c367-2ef9-4b38-9298-dd06bf4cf7d7/bin/utaipan-aC7eJsxGYH/data/615737b0c/1c9311a891a94c8f9ba73ffc7c19115a/FLAG0871321fd [2021-11-03 05:34:07,729 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e18c367-2ef9-4b38-9298-dd06bf4cf7d7/bin/utaipan-aC7eJsxGYH/data/615737b0c/1c9311a891a94c8f9ba73ffc7c19115a [2021-11-03 05:34:07,732 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 05:34:07,733 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 05:34:07,734 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 05:34:07,734 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 05:34:07,738 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 05:34:07,738 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:34:07" (1/1) ... [2021-11-03 05:34:07,739 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5186a396 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:34:07, skipping insertion in model container [2021-11-03 05:34:07,740 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:34:07" (1/1) ... [2021-11-03 05:34:07,747 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 05:34:07,870 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:34:08,995 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_6e18c367-2ef9-4b38-9298-dd06bf4cf7d7/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i[162928,162941] [2021-11-03 05:34:09,412 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:34:09,434 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-03 05:34:09,484 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:34:09,604 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_6e18c367-2ef9-4b38-9298-dd06bf4cf7d7/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i[162928,162941] [2021-11-03 05:34:09,770 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:34:09,779 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 05:34:09,964 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_6e18c367-2ef9-4b38-9298-dd06bf4cf7d7/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i[162928,162941] [2021-11-03 05:34:10,069 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:34:10,208 INFO L208 MainTranslator]: Completed translation [2021-11-03 05:34:10,209 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:34:10 WrapperNode [2021-11-03 05:34:10,209 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 05:34:10,210 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 05:34:10,210 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 05:34:10,210 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 05:34:10,218 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:34:10" (1/1) ... [2021-11-03 05:34:10,310 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:34:10" (1/1) ... [2021-11-03 05:34:10,459 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 05:34:10,460 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 05:34:10,460 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 05:34:10,460 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 05:34:10,468 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:34:10" (1/1) ... [2021-11-03 05:34:10,469 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:34:10" (1/1) ... [2021-11-03 05:34:10,496 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:34:10" (1/1) ... [2021-11-03 05:34:10,497 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:34:10" (1/1) ... [2021-11-03 05:34:10,603 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:34:10" (1/1) ... [2021-11-03 05:34:10,641 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:34:10" (1/1) ... [2021-11-03 05:34:10,716 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:34:10" (1/1) ... [2021-11-03 05:34:10,744 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 05:34:10,746 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 05:34:10,746 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 05:34:10,746 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 05:34:10,750 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:34:10" (1/1) ... [2021-11-03 05:34:10,758 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:34:10,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e18c367-2ef9-4b38-9298-dd06bf4cf7d7/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:34:10,781 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e18c367-2ef9-4b38-9298-dd06bf4cf7d7/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 05:34:10,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e18c367-2ef9-4b38-9298-dd06bf4cf7d7/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 05:34:10,832 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-03 05:34:10,832 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-03 05:34:10,832 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-03 05:34:10,832 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-03 05:34:10,832 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-03 05:34:10,833 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-03 05:34:10,833 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 05:34:10,833 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-03 05:34:10,833 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-03 05:34:10,833 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-03 05:34:10,833 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-03 05:34:10,834 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-03 05:34:10,834 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-03 05:34:10,834 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-03 05:34:10,834 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-03 05:34:10,835 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-03 05:34:10,835 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-03 05:34:10,835 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-03 05:34:10,835 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2021-11-03 05:34:10,835 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-03 05:34:10,835 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2021-11-03 05:34:10,836 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-03 05:34:10,836 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-03 05:34:10,836 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2021-11-03 05:34:10,836 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2021-11-03 05:34:10,836 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-03 05:34:10,836 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-03 05:34:10,837 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 05:34:10,837 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 05:34:31,871 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 05:34:31,871 INFO L299 CfgBuilder]: Removed 769 assume(true) statements. [2021-11-03 05:34:31,875 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:34:31 BoogieIcfgContainer [2021-11-03 05:34:31,875 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 05:34:31,877 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 05:34:31,877 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 05:34:31,880 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 05:34:31,880 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 05:34:07" (1/3) ... [2021-11-03 05:34:31,881 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@859beb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:34:31, skipping insertion in model container [2021-11-03 05:34:31,881 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:34:10" (2/3) ... [2021-11-03 05:34:31,881 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@859beb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:34:31, skipping insertion in model container [2021-11-03 05:34:31,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:34:31" (3/3) ... [2021-11-03 05:34:31,883 INFO L111 eAbstractionObserver]: Analyzing ICFG 205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i [2021-11-03 05:34:31,888 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 05:34:31,888 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-03 05:34:31,942 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 05:34:31,948 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 [2021-11-03 05:34:31,948 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-03 05:34:31,984 INFO L276 IsEmpty]: Start isEmpty. Operand has 898 states, 896 states have (on average 1.5290178571428572) internal successors, (1370), 897 states have internal predecessors, (1370), 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) [2021-11-03 05:34:31,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-03 05:34:31,993 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:34:31,994 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] [2021-11-03 05:34:31,994 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:34:32,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:34:32,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1898451720, now seen corresponding path program 1 times [2021-11-03 05:34:32,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:34:32,014 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1746169692] [2021-11-03 05:34:32,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:34:32,015 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:34:32,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e18c367-2ef9-4b38-9298-dd06bf4cf7d7/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:34:32,021 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e18c367-2ef9-4b38-9298-dd06bf4cf7d7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:34:32,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e18c367-2ef9-4b38-9298-dd06bf4cf7d7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-03 05:34:32,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:34:32,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 05:34:32,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:34:32,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:34:32,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:34:33,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:34:33,091 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:34:33,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1746169692] [2021-11-03 05:34:33,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1746169692] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:34:33,092 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:34:33,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 05:34:33,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88655940] [2021-11-03 05:34:33,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:34:33,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:34:33,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:34:33,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:34:33,119 INFO L87 Difference]: Start difference. First operand has 898 states, 896 states have (on average 1.5290178571428572) internal successors, (1370), 897 states have internal predecessors, (1370), 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 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 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) [2021-11-03 05:34:33,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:34:33,881 INFO L93 Difference]: Finished difference Result 3424 states and 5255 transitions. [2021-11-03 05:34:33,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:34:33,883 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 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 36 [2021-11-03 05:34:33,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:34:33,945 INFO L225 Difference]: With dead ends: 3424 [2021-11-03 05:34:33,949 INFO L226 Difference]: Without dead ends: 2515 [2021-11-03 05:34:33,959 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:34:33,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2515 states. [2021-11-03 05:34:34,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2515 to 2515. [2021-11-03 05:34:34,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2515 states, 2514 states have (on average 1.4657915672235482) internal successors, (3685), 2514 states have internal predecessors, (3685), 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) [2021-11-03 05:34:34,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2515 states to 2515 states and 3685 transitions. [2021-11-03 05:34:34,152 INFO L78 Accepts]: Start accepts. Automaton has 2515 states and 3685 transitions. Word has length 36 [2021-11-03 05:34:34,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:34:34,153 INFO L470 AbstractCegarLoop]: Abstraction has 2515 states and 3685 transitions. [2021-11-03 05:34:34,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 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) [2021-11-03 05:34:34,158 INFO L276 IsEmpty]: Start isEmpty. Operand 2515 states and 3685 transitions. [2021-11-03 05:34:34,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-03 05:34:34,167 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:34:34,167 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] [2021-11-03 05:34:34,183 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e18c367-2ef9-4b38-9298-dd06bf4cf7d7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-03 05:34:34,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e18c367-2ef9-4b38-9298-dd06bf4cf7d7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:34:34,386 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:34:34,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:34:34,386 INFO L85 PathProgramCache]: Analyzing trace with hash 331004688, now seen corresponding path program 1 times [2021-11-03 05:34:34,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:34:34,387 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [891839189] [2021-11-03 05:34:34,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:34:34,388 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:34:34,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e18c367-2ef9-4b38-9298-dd06bf4cf7d7/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:34:34,393 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e18c367-2ef9-4b38-9298-dd06bf4cf7d7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:34:34,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e18c367-2ef9-4b38-9298-dd06bf4cf7d7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-03 05:34:34,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:34:34,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 05:34:34,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:34:35,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:34:35,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:34:35,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:34:35,337 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:34:35,338 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [891839189] [2021-11-03 05:34:35,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [891839189] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:34:35,338 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:34:35,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-03 05:34:35,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011528801] [2021-11-03 05:34:35,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 05:34:35,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:34:35,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 05:34:35,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:34:35,341 INFO L87 Difference]: Start difference. First operand 2515 states and 3685 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 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) [2021-11-03 05:34:35,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:34:35,865 INFO L93 Difference]: Finished difference Result 6629 states and 9733 transitions. [2021-11-03 05:34:35,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 05:34:35,866 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 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 40 [2021-11-03 05:34:35,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:34:35,893 INFO L225 Difference]: With dead ends: 6629 [2021-11-03 05:34:35,893 INFO L226 Difference]: Without dead ends: 4167 [2021-11-03 05:34:35,897 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-03 05:34:35,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4167 states. [2021-11-03 05:34:36,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4167 to 2518. [2021-11-03 05:34:36,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2518 states, 2517 states have (on average 1.464839094159714) internal successors, (3687), 2517 states have internal predecessors, (3687), 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) [2021-11-03 05:34:36,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2518 states to 2518 states and 3687 transitions. [2021-11-03 05:34:36,063 INFO L78 Accepts]: Start accepts. Automaton has 2518 states and 3687 transitions. Word has length 40 [2021-11-03 05:34:36,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:34:36,064 INFO L470 AbstractCegarLoop]: Abstraction has 2518 states and 3687 transitions. [2021-11-03 05:34:36,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 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) [2021-11-03 05:34:36,064 INFO L276 IsEmpty]: Start isEmpty. Operand 2518 states and 3687 transitions. [2021-11-03 05:34:36,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-03 05:34:36,068 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:34:36,068 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] [2021-11-03 05:34:36,088 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e18c367-2ef9-4b38-9298-dd06bf4cf7d7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-03 05:34:36,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e18c367-2ef9-4b38-9298-dd06bf4cf7d7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:34:36,284 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:34:36,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:34:36,285 INFO L85 PathProgramCache]: Analyzing trace with hash -349053682, now seen corresponding path program 1 times [2021-11-03 05:34:36,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:34:36,286 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1567554454] [2021-11-03 05:34:36,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:34:36,287 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:34:36,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e18c367-2ef9-4b38-9298-dd06bf4cf7d7/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:34:36,292 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e18c367-2ef9-4b38-9298-dd06bf4cf7d7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:34:36,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e18c367-2ef9-4b38-9298-dd06bf4cf7d7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-03 05:34:36,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:34:36,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 05:34:36,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:34:37,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:34:37,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:34:37,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:34:37,523 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:34:37,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1567554454] [2021-11-03 05:34:37,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1567554454] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:34:37,523 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:34:37,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-11-03 05:34:37,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175777208] [2021-11-03 05:34:37,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 05:34:37,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:34:37,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 05:34:37,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-03 05:34:37,525 INFO L87 Difference]: Start difference. First operand 2518 states and 3687 transitions. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 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) [2021-11-03 05:34:39,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:34:39,544 INFO L93 Difference]: Finished difference Result 7446 states and 10934 transitions. [2021-11-03 05:34:39,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 05:34:39,544 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 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 40 [2021-11-03 05:34:39,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:34:39,573 INFO L225 Difference]: With dead ends: 7446 [2021-11-03 05:34:39,573 INFO L226 Difference]: Without dead ends: 4975 [2021-11-03 05:34:39,581 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-03 05:34:39,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4975 states. [2021-11-03 05:34:39,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4975 to 4831. [2021-11-03 05:34:39,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4831 states, 4830 states have (on average 1.4737060041407868) internal successors, (7118), 4830 states have internal predecessors, (7118), 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) [2021-11-03 05:34:39,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4831 states to 4831 states and 7118 transitions. [2021-11-03 05:34:39,943 INFO L78 Accepts]: Start accepts. Automaton has 4831 states and 7118 transitions. Word has length 40 [2021-11-03 05:34:39,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:34:39,944 INFO L470 AbstractCegarLoop]: Abstraction has 4831 states and 7118 transitions. [2021-11-03 05:34:39,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 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) [2021-11-03 05:34:39,945 INFO L276 IsEmpty]: Start isEmpty. Operand 4831 states and 7118 transitions. [2021-11-03 05:34:39,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-03 05:34:39,950 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:34:39,950 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-03 05:34:39,971 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e18c367-2ef9-4b38-9298-dd06bf4cf7d7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-03 05:34:40,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e18c367-2ef9-4b38-9298-dd06bf4cf7d7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:34:40,166 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:34:40,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:34:40,167 INFO L85 PathProgramCache]: Analyzing trace with hash 2050141973, now seen corresponding path program 1 times [2021-11-03 05:34:40,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:34:40,168 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [753240133] [2021-11-03 05:34:40,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:34:40,168 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:34:40,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e18c367-2ef9-4b38-9298-dd06bf4cf7d7/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:34:40,172 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e18c367-2ef9-4b38-9298-dd06bf4cf7d7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:34:40,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e18c367-2ef9-4b38-9298-dd06bf4cf7d7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-03 05:34:40,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:34:40,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 05:34:40,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:34:41,193 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:34:41,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:34:41,615 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:34:41,615 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:34:41,615 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [753240133] [2021-11-03 05:34:41,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [753240133] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:34:41,615 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:34:41,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 05:34:41,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116405016] [2021-11-03 05:34:41,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:34:41,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:34:41,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:34:41,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:34:41,618 INFO L87 Difference]: Start difference. First operand 4831 states and 7118 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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) [2021-11-03 05:34:42,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:34:42,293 INFO L93 Difference]: Finished difference Result 11795 states and 17437 transitions. [2021-11-03 05:34:42,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:34:42,294 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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 69 [2021-11-03 05:34:42,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:34:42,335 INFO L225 Difference]: With dead ends: 11795 [2021-11-03 05:34:42,336 INFO L226 Difference]: Without dead ends: 7017 [2021-11-03 05:34:42,344 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:34:42,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7017 states. [2021-11-03 05:34:42,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7017 to 6991. [2021-11-03 05:34:42,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6991 states, 6990 states have (on average 1.4804005722460658) internal successors, (10348), 6990 states have internal predecessors, (10348), 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) [2021-11-03 05:34:42,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6991 states to 6991 states and 10348 transitions. [2021-11-03 05:34:42,769 INFO L78 Accepts]: Start accepts. Automaton has 6991 states and 10348 transitions. Word has length 69 [2021-11-03 05:34:42,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:34:42,771 INFO L470 AbstractCegarLoop]: Abstraction has 6991 states and 10348 transitions. [2021-11-03 05:34:42,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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) [2021-11-03 05:34:42,772 INFO L276 IsEmpty]: Start isEmpty. Operand 6991 states and 10348 transitions. [2021-11-03 05:34:42,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-03 05:34:42,782 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:34:42,783 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] [2021-11-03 05:34:42,806 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e18c367-2ef9-4b38-9298-dd06bf4cf7d7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-03 05:34:43,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e18c367-2ef9-4b38-9298-dd06bf4cf7d7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:34:43,000 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:34:43,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:34:43,001 INFO L85 PathProgramCache]: Analyzing trace with hash -643253754, now seen corresponding path program 1 times [2021-11-03 05:34:43,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:34:43,002 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [774899755] [2021-11-03 05:34:43,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:34:43,003 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:34:43,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e18c367-2ef9-4b38-9298-dd06bf4cf7d7/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:34:43,010 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e18c367-2ef9-4b38-9298-dd06bf4cf7d7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:34:43,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e18c367-2ef9-4b38-9298-dd06bf4cf7d7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-03 05:34:43,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:34:43,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 05:34:43,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:34:44,038 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:34:44,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:34:44,440 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:34:44,441 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:34:44,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [774899755] [2021-11-03 05:34:44,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [774899755] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:34:44,441 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:34:44,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 05:34:44,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315168742] [2021-11-03 05:34:44,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:34:44,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:34:44,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:34:44,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:34:44,444 INFO L87 Difference]: Start difference. First operand 6991 states and 10348 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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) [2021-11-03 05:34:45,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:34:45,037 INFO L93 Difference]: Finished difference Result 16727 states and 24734 transitions. [2021-11-03 05:34:45,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:34:45,038 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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 [2021-11-03 05:34:45,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:34:45,106 INFO L225 Difference]: With dead ends: 16727 [2021-11-03 05:34:45,107 INFO L226 Difference]: Without dead ends: 9789 [2021-11-03 05:34:45,119 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:34:45,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9789 states. [2021-11-03 05:34:45,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9789 to 9760. [2021-11-03 05:34:45,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9760 states, 9759 states have (on average 1.4756634901116918) internal successors, (14401), 9759 states have internal predecessors, (14401), 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) [2021-11-03 05:34:45,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9760 states to 9760 states and 14401 transitions. [2021-11-03 05:34:45,688 INFO L78 Accepts]: Start accepts. Automaton has 9760 states and 14401 transitions. Word has length 75 [2021-11-03 05:34:45,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:34:45,689 INFO L470 AbstractCegarLoop]: Abstraction has 9760 states and 14401 transitions. [2021-11-03 05:34:45,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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) [2021-11-03 05:34:45,690 INFO L276 IsEmpty]: Start isEmpty. Operand 9760 states and 14401 transitions. [2021-11-03 05:34:45,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-03 05:34:45,701 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:34:45,701 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-03 05:34:45,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e18c367-2ef9-4b38-9298-dd06bf4cf7d7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-03 05:34:45,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e18c367-2ef9-4b38-9298-dd06bf4cf7d7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:34:45,921 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:34:45,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:34:45,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1358903704, now seen corresponding path program 1 times [2021-11-03 05:34:45,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:34:45,922 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [20788612] [2021-11-03 05:34:45,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:34:45,922 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:34:45,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e18c367-2ef9-4b38-9298-dd06bf4cf7d7/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:34:45,923 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e18c367-2ef9-4b38-9298-dd06bf4cf7d7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:34:45,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e18c367-2ef9-4b38-9298-dd06bf4cf7d7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-03 05:34:46,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:34:46,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 05:34:46,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:34:46,929 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:34:46,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:34:47,416 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:34:47,416 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:34:47,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [20788612] [2021-11-03 05:34:47,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [20788612] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:34:47,417 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:34:47,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 05:34:47,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806309631] [2021-11-03 05:34:47,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:34:47,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:34:47,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:34:47,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:34:47,418 INFO L87 Difference]: Start difference. First operand 9760 states and 14401 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 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) [2021-11-03 05:34:48,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:34:48,976 INFO L93 Difference]: Finished difference Result 24595 states and 36627 transitions. [2021-11-03 05:34:48,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:34:48,976 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 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 83 [2021-11-03 05:34:48,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:34:49,017 INFO L225 Difference]: With dead ends: 24595 [2021-11-03 05:34:49,017 INFO L226 Difference]: Without dead ends: 14888 [2021-11-03 05:34:49,034 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:34:49,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14888 states. [2021-11-03 05:34:49,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14888 to 14836. [2021-11-03 05:34:49,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14836 states, 14835 states have (on average 1.4816986855409504) internal successors, (21981), 14835 states have internal predecessors, (21981), 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) [2021-11-03 05:34:49,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14836 states to 14836 states and 21981 transitions. [2021-11-03 05:34:49,860 INFO L78 Accepts]: Start accepts. Automaton has 14836 states and 21981 transitions. Word has length 83 [2021-11-03 05:34:49,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:34:49,862 INFO L470 AbstractCegarLoop]: Abstraction has 14836 states and 21981 transitions. [2021-11-03 05:34:49,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 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) [2021-11-03 05:34:49,862 INFO L276 IsEmpty]: Start isEmpty. Operand 14836 states and 21981 transitions. [2021-11-03 05:34:49,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-03 05:34:49,876 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:34:49,877 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-03 05:34:49,900 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e18c367-2ef9-4b38-9298-dd06bf4cf7d7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-03 05:34:50,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e18c367-2ef9-4b38-9298-dd06bf4cf7d7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:34:50,090 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:34:50,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:34:50,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1475894567, now seen corresponding path program 1 times [2021-11-03 05:34:50,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:34:50,092 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [626582463] [2021-11-03 05:34:50,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:34:50,092 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:34:50,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e18c367-2ef9-4b38-9298-dd06bf4cf7d7/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:34:50,094 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e18c367-2ef9-4b38-9298-dd06bf4cf7d7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:34:50,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e18c367-2ef9-4b38-9298-dd06bf4cf7d7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-03 05:34:50,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:34:50,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 05:34:50,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:34:51,215 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-03 05:34:51,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:34:51,499 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-03 05:34:51,500 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:34:51,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [626582463] [2021-11-03 05:34:51,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [626582463] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:34:51,500 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:34:51,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 05:34:51,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979633825] [2021-11-03 05:34:51,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:34:51,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:34:51,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:34:51,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:34:51,502 INFO L87 Difference]: Start difference. First operand 14836 states and 21981 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 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) [2021-11-03 05:34:52,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:34:52,797 INFO L93 Difference]: Finished difference Result 35912 states and 53342 transitions. [2021-11-03 05:34:52,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:34:52,797 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 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 84 [2021-11-03 05:34:52,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:34:52,884 INFO L225 Difference]: With dead ends: 35912 [2021-11-03 05:34:52,884 INFO L226 Difference]: Without dead ends: 28317 [2021-11-03 05:34:52,899 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:34:52,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28317 states. [2021-11-03 05:34:53,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28317 to 15028. [2021-11-03 05:34:53,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15028 states, 15027 states have (on average 1.4755440207626274) internal successors, (22173), 15027 states have internal predecessors, (22173), 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) [2021-11-03 05:34:53,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15028 states to 15028 states and 22173 transitions. [2021-11-03 05:34:53,879 INFO L78 Accepts]: Start accepts. Automaton has 15028 states and 22173 transitions. Word has length 84 [2021-11-03 05:34:53,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:34:53,879 INFO L470 AbstractCegarLoop]: Abstraction has 15028 states and 22173 transitions. [2021-11-03 05:34:53,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 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) [2021-11-03 05:34:53,880 INFO L276 IsEmpty]: Start isEmpty. Operand 15028 states and 22173 transitions. [2021-11-03 05:34:53,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-03 05:34:53,892 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:34:53,893 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-03 05:34:53,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e18c367-2ef9-4b38-9298-dd06bf4cf7d7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-03 05:34:54,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e18c367-2ef9-4b38-9298-dd06bf4cf7d7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:34:54,112 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:34:54,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:34:54,113 INFO L85 PathProgramCache]: Analyzing trace with hash 341292008, now seen corresponding path program 1 times [2021-11-03 05:34:54,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:34:54,114 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1295937815] [2021-11-03 05:34:54,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:34:54,114 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:34:54,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e18c367-2ef9-4b38-9298-dd06bf4cf7d7/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:34:54,115 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e18c367-2ef9-4b38-9298-dd06bf4cf7d7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:34:54,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e18c367-2ef9-4b38-9298-dd06bf4cf7d7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-03 05:34:54,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:34:54,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:34:54,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:34:55,498 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-03 05:34:55,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:34:56,254 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-03 05:34:56,254 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:34:56,254 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1295937815] [2021-11-03 05:34:56,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1295937815] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:34:56,255 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:34:56,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 05:34:56,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198106354] [2021-11-03 05:34:56,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:34:56,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:34:56,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:34:56,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:34:56,257 INFO L87 Difference]: Start difference. First operand 15028 states and 22173 transitions. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 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) [2021-11-03 05:35:01,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:35:01,420 INFO L93 Difference]: Finished difference Result 43004 states and 63555 transitions. [2021-11-03 05:35:01,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 05:35:01,420 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 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 86 [2021-11-03 05:35:01,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:35:01,484 INFO L225 Difference]: With dead ends: 43004 [2021-11-03 05:35:01,484 INFO L226 Difference]: Without dead ends: 28029 [2021-11-03 05:35:01,507 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:35:01,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28029 states. [2021-11-03 05:35:02,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28029 to 14398. [2021-11-03 05:35:02,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14398 states, 14397 states have (on average 1.4649579773563937) internal successors, (21091), 14397 states have internal predecessors, (21091), 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) [2021-11-03 05:35:02,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14398 states to 14398 states and 21091 transitions. [2021-11-03 05:35:02,353 INFO L78 Accepts]: Start accepts. Automaton has 14398 states and 21091 transitions. Word has length 86 [2021-11-03 05:35:02,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:35:02,353 INFO L470 AbstractCegarLoop]: Abstraction has 14398 states and 21091 transitions. [2021-11-03 05:35:02,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 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) [2021-11-03 05:35:02,354 INFO L276 IsEmpty]: Start isEmpty. Operand 14398 states and 21091 transitions. [2021-11-03 05:35:02,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-03 05:35:02,373 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:35:02,374 INFO L513 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:35:02,398 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e18c367-2ef9-4b38-9298-dd06bf4cf7d7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-03 05:35:02,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e18c367-2ef9-4b38-9298-dd06bf4cf7d7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:35:02,588 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:35:02,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:35:02,588 INFO L85 PathProgramCache]: Analyzing trace with hash -265952138, now seen corresponding path program 1 times [2021-11-03 05:35:02,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:35:02,589 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1062980694] [2021-11-03 05:35:02,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:35:02,590 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:35:02,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e18c367-2ef9-4b38-9298-dd06bf4cf7d7/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:35:02,591 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e18c367-2ef9-4b38-9298-dd06bf4cf7d7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:35:02,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e18c367-2ef9-4b38-9298-dd06bf4cf7d7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-03 05:35:03,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:35:03,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 603 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:35:03,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:35:03,916 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-03 05:35:03,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:35:04,533 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-03 05:35:04,533 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:35:04,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1062980694] [2021-11-03 05:35:04,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1062980694] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:35:04,533 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:35:04,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 05:35:04,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55075758] [2021-11-03 05:35:04,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:35:04,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:35:04,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:35:04,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:35:04,535 INFO L87 Difference]: Start difference. First operand 14398 states and 21091 transitions. Second operand has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 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) [2021-11-03 05:35:06,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:35:06,035 INFO L93 Difference]: Finished difference Result 36643 states and 53395 transitions. [2021-11-03 05:35:06,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 05:35:06,040 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 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 119 [2021-11-03 05:35:06,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:35:06,086 INFO L225 Difference]: With dead ends: 36643 [2021-11-03 05:35:06,086 INFO L226 Difference]: Without dead ends: 22298 [2021-11-03 05:35:06,111 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-03 05:35:06,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22298 states. [2021-11-03 05:35:06,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22298 to 14422. [2021-11-03 05:35:06,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14422 states, 14421 states have (on average 1.4641841758546563) internal successors, (21115), 14421 states have internal predecessors, (21115), 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) [2021-11-03 05:35:06,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14422 states to 14422 states and 21115 transitions. [2021-11-03 05:35:06,967 INFO L78 Accepts]: Start accepts. Automaton has 14422 states and 21115 transitions. Word has length 119 [2021-11-03 05:35:06,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:35:06,967 INFO L470 AbstractCegarLoop]: Abstraction has 14422 states and 21115 transitions. [2021-11-03 05:35:06,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 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) [2021-11-03 05:35:06,967 INFO L276 IsEmpty]: Start isEmpty. Operand 14422 states and 21115 transitions. [2021-11-03 05:35:06,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-03 05:35:06,984 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:35:06,984 INFO L513 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:35:07,010 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e18c367-2ef9-4b38-9298-dd06bf4cf7d7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-03 05:35:07,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e18c367-2ef9-4b38-9298-dd06bf4cf7d7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:35:07,206 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:35:07,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:35:07,207 INFO L85 PathProgramCache]: Analyzing trace with hash 464660825, now seen corresponding path program 1 times [2021-11-03 05:35:07,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:35:07,208 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2137729384] [2021-11-03 05:35:07,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:35:07,208 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:35:07,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e18c367-2ef9-4b38-9298-dd06bf4cf7d7/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:35:07,209 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e18c367-2ef9-4b38-9298-dd06bf4cf7d7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:35:07,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e18c367-2ef9-4b38-9298-dd06bf4cf7d7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-03 05:35:07,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:35:07,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 636 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 05:35:07,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:35:08,644 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-03 05:35:08,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:35:09,387 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-03 05:35:09,388 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:35:09,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2137729384] [2021-11-03 05:35:09,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2137729384] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:35:09,388 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:35:09,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-03 05:35:09,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284519758] [2021-11-03 05:35:09,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 05:35:09,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:35:09,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 05:35:09,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-03 05:35:09,390 INFO L87 Difference]: Start difference. First operand 14422 states and 21115 transitions. Second operand has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 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) [2021-11-03 05:35:12,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:35:12,523 INFO L93 Difference]: Finished difference Result 43979 states and 64011 transitions. [2021-11-03 05:35:12,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-03 05:35:12,524 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 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 126 [2021-11-03 05:35:12,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:35:12,573 INFO L225 Difference]: With dead ends: 43979 [2021-11-03 05:35:12,573 INFO L226 Difference]: Without dead ends: 29610 [2021-11-03 05:35:12,587 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2021-11-03 05:35:12,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29610 states. [2021-11-03 05:35:13,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29610 to 14422. [2021-11-03 05:35:13,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14422 states, 14421 states have (on average 1.4641841758546563) internal successors, (21115), 14421 states have internal predecessors, (21115), 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) [2021-11-03 05:35:13,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14422 states to 14422 states and 21115 transitions. [2021-11-03 05:35:13,643 INFO L78 Accepts]: Start accepts. Automaton has 14422 states and 21115 transitions. Word has length 126 [2021-11-03 05:35:13,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:35:13,644 INFO L470 AbstractCegarLoop]: Abstraction has 14422 states and 21115 transitions. [2021-11-03 05:35:13,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 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) [2021-11-03 05:35:13,644 INFO L276 IsEmpty]: Start isEmpty. Operand 14422 states and 21115 transitions. [2021-11-03 05:35:13,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-03 05:35:13,657 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:35:13,657 INFO L513 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:35:13,672 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e18c367-2ef9-4b38-9298-dd06bf4cf7d7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-03 05:35:13,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e18c367-2ef9-4b38-9298-dd06bf4cf7d7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:35:13,860 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:35:13,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:35:13,860 INFO L85 PathProgramCache]: Analyzing trace with hash -443712689, now seen corresponding path program 1 times [2021-11-03 05:35:13,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:35:13,862 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1843618255] [2021-11-03 05:35:13,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:35:13,862 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:35:13,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e18c367-2ef9-4b38-9298-dd06bf4cf7d7/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:35:13,863 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e18c367-2ef9-4b38-9298-dd06bf4cf7d7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:35:13,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e18c367-2ef9-4b38-9298-dd06bf4cf7d7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-03 05:35:14,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:35:15,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 851 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-03 05:35:15,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:35:16,127 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-03 05:35:16,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:35:17,343 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-03 05:35:17,343 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:35:17,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1843618255] [2021-11-03 05:35:17,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1843618255] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:35:17,344 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:35:17,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-03 05:35:17,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811226750] [2021-11-03 05:35:17,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-03 05:35:17,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:35:17,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-03 05:35:17,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-11-03 05:35:17,348 INFO L87 Difference]: Start difference. First operand 14422 states and 21115 transitions. Second operand has 12 states, 12 states have (on average 12.083333333333334) internal successors, (145), 12 states have internal predecessors, (145), 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) [2021-11-03 05:35:25,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:35:25,012 INFO L93 Difference]: Finished difference Result 53690 states and 78603 transitions. [2021-11-03 05:35:25,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-03 05:35:25,013 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 12.083333333333334) internal successors, (145), 12 states have internal predecessors, (145), 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 141 [2021-11-03 05:35:25,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:35:25,062 INFO L225 Difference]: With dead ends: 53690 [2021-11-03 05:35:25,062 INFO L226 Difference]: Without dead ends: 39321 [2021-11-03 05:35:25,076 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-11-03 05:35:25,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39321 states. [2021-11-03 05:35:26,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39321 to 14482. [2021-11-03 05:35:26,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14482 states, 14481 states have (on average 1.4622608935846972) internal successors, (21175), 14481 states have internal predecessors, (21175), 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) [2021-11-03 05:35:26,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14482 states to 14482 states and 21175 transitions. [2021-11-03 05:35:26,151 INFO L78 Accepts]: Start accepts. Automaton has 14482 states and 21175 transitions. Word has length 141 [2021-11-03 05:35:26,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:35:26,151 INFO L470 AbstractCegarLoop]: Abstraction has 14482 states and 21175 transitions. [2021-11-03 05:35:26,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 12.083333333333334) internal successors, (145), 12 states have internal predecessors, (145), 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) [2021-11-03 05:35:26,151 INFO L276 IsEmpty]: Start isEmpty. Operand 14482 states and 21175 transitions. [2021-11-03 05:35:26,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-03 05:35:26,162 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:35:26,162 INFO L513 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:35:26,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e18c367-2ef9-4b38-9298-dd06bf4cf7d7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-03 05:35:26,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e18c367-2ef9-4b38-9298-dd06bf4cf7d7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:35:26,363 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:35:26,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:35:26,363 INFO L85 PathProgramCache]: Analyzing trace with hash 549404179, now seen corresponding path program 1 times [2021-11-03 05:35:26,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:35:26,364 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [814563792] [2021-11-03 05:35:26,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:35:26,365 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:35:26,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e18c367-2ef9-4b38-9298-dd06bf4cf7d7/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:35:26,365 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e18c367-2ef9-4b38-9298-dd06bf4cf7d7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:35:26,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e18c367-2ef9-4b38-9298-dd06bf4cf7d7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-03 05:35:27,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:35:27,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 862 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-03 05:35:27,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:35:28,345 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-03 05:35:28,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:35:28,903 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-03 05:35:28,903 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:35:28,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [814563792] [2021-11-03 05:35:28,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [814563792] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:35:28,903 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:35:28,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-03 05:35:28,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883017353] [2021-11-03 05:35:28,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 05:35:28,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:35:28,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 05:35:28,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:35:28,905 INFO L87 Difference]: Start difference. First operand 14482 states and 21175 transitions. Second operand has 5 states, 5 states have (on average 26.8) internal successors, (134), 5 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) [2021-11-03 05:35:33,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:35:33,066 INFO L93 Difference]: Finished difference Result 66222 states and 96797 transitions. [2021-11-03 05:35:33,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 05:35:33,067 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.8) internal successors, (134), 5 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 143 [2021-11-03 05:35:33,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:35:33,140 INFO L225 Difference]: With dead ends: 66222 [2021-11-03 05:35:33,140 INFO L226 Difference]: Without dead ends: 51793 [2021-11-03 05:35:33,160 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 283 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 05:35:33,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51793 states. [2021-11-03 05:35:34,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51793 to 14530. [2021-11-03 05:35:34,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14530 states, 14529 states have (on average 1.4607337050037856) internal successors, (21223), 14529 states have internal predecessors, (21223), 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) [2021-11-03 05:35:34,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14530 states to 14530 states and 21223 transitions. [2021-11-03 05:35:34,721 INFO L78 Accepts]: Start accepts. Automaton has 14530 states and 21223 transitions. Word has length 143 [2021-11-03 05:35:34,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:35:34,721 INFO L470 AbstractCegarLoop]: Abstraction has 14530 states and 21223 transitions. [2021-11-03 05:35:34,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.8) internal successors, (134), 5 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) [2021-11-03 05:35:34,721 INFO L276 IsEmpty]: Start isEmpty. Operand 14530 states and 21223 transitions. [2021-11-03 05:35:34,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-03 05:35:34,731 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:35:34,732 INFO L513 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:35:34,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e18c367-2ef9-4b38-9298-dd06bf4cf7d7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-03 05:35:34,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e18c367-2ef9-4b38-9298-dd06bf4cf7d7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:35:34,933 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:35:34,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:35:34,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1758105866, now seen corresponding path program 1 times [2021-11-03 05:35:34,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:35:34,935 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [103876598] [2021-11-03 05:35:34,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:35:34,936 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:35:34,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e18c367-2ef9-4b38-9298-dd06bf4cf7d7/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:35:34,936 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e18c367-2ef9-4b38-9298-dd06bf4cf7d7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:35:34,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e18c367-2ef9-4b38-9298-dd06bf4cf7d7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-03 05:35:36,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:35:36,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 866 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-03 05:35:36,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:35:39,412 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-03 05:35:39,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:35:41,521 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-03 05:35:41,522 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:35:41,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [103876598] [2021-11-03 05:35:41,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [103876598] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:35:41,523 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:35:41,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-03 05:35:41,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163000579] [2021-11-03 05:35:41,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-03 05:35:41,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:35:41,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-03 05:35:41,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-03 05:35:41,525 INFO L87 Difference]: Start difference. First operand 14530 states and 21223 transitions. Second operand has 11 states, 11 states have (on average 19.90909090909091) internal successors, (219), 11 states have internal predecessors, (219), 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) [2021-11-03 05:35:53,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:35:53,999 INFO L93 Difference]: Finished difference Result 123871 states and 180787 transitions. [2021-11-03 05:35:54,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-03 05:35:54,001 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 19.90909090909091) internal successors, (219), 11 states have internal predecessors, (219), 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 [2021-11-03 05:35:54,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:35:54,162 INFO L225 Difference]: With dead ends: 123871 [2021-11-03 05:35:54,162 INFO L226 Difference]: Without dead ends: 109394 [2021-11-03 05:35:54,184 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 275 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=125, Invalid=337, Unknown=0, NotChecked=0, Total=462 [2021-11-03 05:35:54,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109394 states. [2021-11-03 05:35:57,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109394 to 30574. [2021-11-03 05:35:57,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30574 states, 30573 states have (on average 1.4598829032152554) internal successors, (44633), 30573 states have internal predecessors, (44633), 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) [2021-11-03 05:35:57,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30574 states to 30574 states and 44633 transitions. [2021-11-03 05:35:57,608 INFO L78 Accepts]: Start accepts. Automaton has 30574 states and 44633 transitions. Word has length 143 [2021-11-03 05:35:57,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:35:57,609 INFO L470 AbstractCegarLoop]: Abstraction has 30574 states and 44633 transitions. [2021-11-03 05:35:57,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 19.90909090909091) internal successors, (219), 11 states have internal predecessors, (219), 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) [2021-11-03 05:35:57,609 INFO L276 IsEmpty]: Start isEmpty. Operand 30574 states and 44633 transitions. [2021-11-03 05:35:57,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-03 05:35:57,628 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:35:57,629 INFO L513 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:35:57,658 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e18c367-2ef9-4b38-9298-dd06bf4cf7d7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-03 05:35:57,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e18c367-2ef9-4b38-9298-dd06bf4cf7d7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:35:57,843 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:35:57,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:35:57,844 INFO L85 PathProgramCache]: Analyzing trace with hash 691494264, now seen corresponding path program 1 times [2021-11-03 05:35:57,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:35:57,845 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1148096723] [2021-11-03 05:35:57,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:35:57,845 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:35:57,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e18c367-2ef9-4b38-9298-dd06bf4cf7d7/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:35:57,847 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e18c367-2ef9-4b38-9298-dd06bf4cf7d7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:35:57,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e18c367-2ef9-4b38-9298-dd06bf4cf7d7/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-03 05:35:59,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:35:59,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 864 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 05:35:59,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:35:59,942 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-03 05:35:59,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:36:00,387 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-03 05:36:00,387 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:36:00,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1148096723] [2021-11-03 05:36:00,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1148096723] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:36:00,387 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:36:00,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 05:36:00,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875249461] [2021-11-03 05:36:00,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:36:00,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:36:00,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:36:00,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:36:00,389 INFO L87 Difference]: Start difference. First operand 30574 states and 44633 transitions. Second operand has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 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)