./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_synctty.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061a454-a68a-4c76-8345-1d3c2c16ba23/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061a454-a68a-4c76-8345-1d3c2c16ba23/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061a454-a68a-4c76-8345-1d3c2c16ba23/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061a454-a68a-4c76-8345-1d3c2c16ba23/bin/utaipan-UUZaoUuFF8/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_synctty.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061a454-a68a-4c76-8345-1d3c2c16ba23/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061a454-a68a-4c76-8345-1d3c2c16ba23/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 389f662f7096bd36438270dc54f296be4073de8eeb864b893c17044d6fb4cc06 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 00:53:05,987 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 00:53:05,990 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 00:53:06,045 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 00:53:06,046 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 00:53:06,050 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 00:53:06,052 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 00:53:06,055 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 00:53:06,058 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 00:53:06,063 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 00:53:06,065 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 00:53:06,067 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 00:53:06,067 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 00:53:06,070 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 00:53:06,072 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 00:53:06,076 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 00:53:06,078 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 00:53:06,079 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 00:53:06,081 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 00:53:06,088 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 00:53:06,090 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 00:53:06,092 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 00:53:06,095 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 00:53:06,096 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 00:53:06,104 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 00:53:06,105 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 00:53:06,105 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 00:53:06,107 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 00:53:06,107 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 00:53:06,109 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 00:53:06,109 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 00:53:06,110 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 00:53:06,112 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 00:53:06,113 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 00:53:06,115 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 00:53:06,115 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 00:53:06,116 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 00:53:06,116 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 00:53:06,116 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 00:53:06,117 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 00:53:06,118 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 00:53:06,119 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061a454-a68a-4c76-8345-1d3c2c16ba23/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-07 00:53:06,162 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 00:53:06,162 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 00:53:06,164 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 00:53:06,164 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 00:53:06,164 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 00:53:06,164 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 00:53:06,165 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 00:53:06,165 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 00:53:06,165 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 00:53:06,165 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 00:53:06,166 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 00:53:06,167 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 00:53:06,167 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 00:53:06,167 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 00:53:06,167 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 00:53:06,168 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 00:53:06,168 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 00:53:06,169 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 00:53:06,169 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 00:53:06,169 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 00:53:06,169 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 00:53:06,170 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 00:53:06,170 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 00:53:06,170 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 00:53:06,170 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 00:53:06,171 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 00:53:06,171 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 00:53:06,171 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 00:53:06,172 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 00:53:06,173 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 00:53:06,173 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 00:53:06,174 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 00:53:06,174 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 00:53:06,174 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 00:53:06,174 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 00:53:06,175 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 00:53:06,175 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_1061a454-a68a-4c76-8345-1d3c2c16ba23/bin/utaipan-UUZaoUuFF8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061a454-a68a-4c76-8345-1d3c2c16ba23/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 389f662f7096bd36438270dc54f296be4073de8eeb864b893c17044d6fb4cc06 [2021-11-07 00:53:06,496 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 00:53:06,524 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 00:53:06,526 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 00:53:06,528 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 00:53:06,529 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 00:53:06,531 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061a454-a68a-4c76-8345-1d3c2c16ba23/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_synctty.ko-entry_point.cil.out.i [2021-11-07 00:53:06,617 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061a454-a68a-4c76-8345-1d3c2c16ba23/bin/utaipan-UUZaoUuFF8/data/a4f101045/1efb3bd90b1d4391907376224b898c70/FLAG22c33b200 [2021-11-07 00:53:07,654 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 00:53:07,656 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061a454-a68a-4c76-8345-1d3c2c16ba23/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_synctty.ko-entry_point.cil.out.i [2021-11-07 00:53:07,704 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061a454-a68a-4c76-8345-1d3c2c16ba23/bin/utaipan-UUZaoUuFF8/data/a4f101045/1efb3bd90b1d4391907376224b898c70/FLAG22c33b200 [2021-11-07 00:53:08,060 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061a454-a68a-4c76-8345-1d3c2c16ba23/bin/utaipan-UUZaoUuFF8/data/a4f101045/1efb3bd90b1d4391907376224b898c70 [2021-11-07 00:53:08,063 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 00:53:08,064 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 00:53:08,069 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 00:53:08,069 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 00:53:08,072 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 00:53:08,073 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:53:08" (1/1) ... [2021-11-07 00:53:08,074 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53664e4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:53:08, skipping insertion in model container [2021-11-07 00:53:08,075 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:53:08" (1/1) ... [2021-11-07 00:53:08,082 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 00:53:08,212 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 00:53:09,308 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_1061a454-a68a-4c76-8345-1d3c2c16ba23/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_synctty.ko-entry_point.cil.out.i[163507,163520] [2021-11-07 00:53:09,397 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 00:53:09,447 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 00:53:09,460 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 00:53:09,480 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 00:53:09,545 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 00:53:09,545 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 00:53:09,575 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 00:53:09,601 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 00:53:09,602 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 00:53:09,607 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 00:53:09,608 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 00:53:09,609 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 00:53:09,609 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 00:53:09,610 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 00:53:09,610 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 00:53:09,656 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 00:53:09,683 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 00:53:09,707 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-07 00:53:09,709 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5d608b27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:53:09, skipping insertion in model container [2021-11-07 00:53:09,709 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 00:53:09,710 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 00:53:09,712 INFO L168 Benchmark]: Toolchain (without parser) took 1646.18 ms. Allocated memory was 115.3 MB in the beginning and 146.8 MB in the end (delta: 31.5 MB). Free memory was 75.3 MB in the beginning and 72.1 MB in the end (delta: 3.2 MB). Peak memory consumption was 36.8 MB. Max. memory is 16.1 GB. [2021-11-07 00:53:09,713 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 115.3 MB. Free memory is still 71.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 00:53:09,714 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1641.00 ms. Allocated memory was 115.3 MB in the beginning and 146.8 MB in the end (delta: 31.5 MB). Free memory was 75.0 MB in the beginning and 72.1 MB in the end (delta: 2.9 MB). Peak memory consumption was 34.7 MB. Max. memory is 16.1 GB. [2021-11-07 00:53:09,717 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 115.3 MB. Free memory is still 71.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 1641.00 ms. Allocated memory was 115.3 MB in the beginning and 146.8 MB in the end (delta: 31.5 MB). Free memory was 75.0 MB in the beginning and 72.1 MB in the end (delta: 2.9 MB). Peak memory consumption was 34.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 5527]: 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_1061a454-a68a-4c76-8345-1d3c2c16ba23/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061a454-a68a-4c76-8345-1d3c2c16ba23/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061a454-a68a-4c76-8345-1d3c2c16ba23/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061a454-a68a-4c76-8345-1d3c2c16ba23/bin/utaipan-UUZaoUuFF8/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_synctty.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061a454-a68a-4c76-8345-1d3c2c16ba23/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061a454-a68a-4c76-8345-1d3c2c16ba23/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 389f662f7096bd36438270dc54f296be4073de8eeb864b893c17044d6fb4cc06 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 00:53:11,950 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 00:53:11,952 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 00:53:11,990 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 00:53:11,991 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 00:53:11,992 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 00:53:11,994 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 00:53:11,997 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 00:53:11,999 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 00:53:12,001 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 00:53:12,002 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 00:53:12,004 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 00:53:12,005 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 00:53:12,006 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 00:53:12,008 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 00:53:12,010 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 00:53:12,011 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 00:53:12,012 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 00:53:12,014 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 00:53:12,017 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 00:53:12,019 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 00:53:12,021 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 00:53:12,023 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 00:53:12,024 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 00:53:12,028 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 00:53:12,028 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 00:53:12,029 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 00:53:12,030 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 00:53:12,031 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 00:53:12,032 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 00:53:12,032 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 00:53:12,034 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 00:53:12,035 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 00:53:12,036 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 00:53:12,037 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 00:53:12,038 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 00:53:12,039 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 00:53:12,039 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 00:53:12,040 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 00:53:12,041 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 00:53:12,042 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 00:53:12,043 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061a454-a68a-4c76-8345-1d3c2c16ba23/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-07 00:53:12,071 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 00:53:12,074 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 00:53:12,076 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 00:53:12,076 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 00:53:12,076 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 00:53:12,077 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 00:53:12,079 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 00:53:12,080 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 00:53:12,080 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 00:53:12,081 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 00:53:12,083 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 00:53:12,083 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 00:53:12,084 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 00:53:12,084 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 00:53:12,084 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 00:53:12,084 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 00:53:12,084 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 00:53:12,085 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 00:53:12,085 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 00:53:12,085 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 00:53:12,085 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 00:53:12,086 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 00:53:12,086 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 00:53:12,086 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 00:53:12,086 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 00:53:12,087 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 00:53:12,087 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 00:53:12,087 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 00:53:12,087 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 00:53:12,088 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 00:53:12,088 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 00:53:12,088 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 00:53:12,088 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_1061a454-a68a-4c76-8345-1d3c2c16ba23/bin/utaipan-UUZaoUuFF8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061a454-a68a-4c76-8345-1d3c2c16ba23/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 389f662f7096bd36438270dc54f296be4073de8eeb864b893c17044d6fb4cc06 [2021-11-07 00:53:12,502 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 00:53:12,534 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 00:53:12,538 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 00:53:12,539 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 00:53:12,540 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 00:53:12,541 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061a454-a68a-4c76-8345-1d3c2c16ba23/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_synctty.ko-entry_point.cil.out.i [2021-11-07 00:53:12,622 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061a454-a68a-4c76-8345-1d3c2c16ba23/bin/utaipan-UUZaoUuFF8/data/ac6013a21/3a5c22ecaebf4b008d3e938286c7686c/FLAGff4fed29d [2021-11-07 00:53:13,467 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 00:53:13,468 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061a454-a68a-4c76-8345-1d3c2c16ba23/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_synctty.ko-entry_point.cil.out.i [2021-11-07 00:53:13,519 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061a454-a68a-4c76-8345-1d3c2c16ba23/bin/utaipan-UUZaoUuFF8/data/ac6013a21/3a5c22ecaebf4b008d3e938286c7686c/FLAGff4fed29d [2021-11-07 00:53:14,006 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061a454-a68a-4c76-8345-1d3c2c16ba23/bin/utaipan-UUZaoUuFF8/data/ac6013a21/3a5c22ecaebf4b008d3e938286c7686c [2021-11-07 00:53:14,008 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 00:53:14,010 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 00:53:14,013 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 00:53:14,014 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 00:53:14,017 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 00:53:14,018 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:53:14" (1/1) ... [2021-11-07 00:53:14,019 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66637f5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:53:14, skipping insertion in model container [2021-11-07 00:53:14,019 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:53:14" (1/1) ... [2021-11-07 00:53:14,026 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 00:53:14,147 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 00:53:15,186 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_1061a454-a68a-4c76-8345-1d3c2c16ba23/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_synctty.ko-entry_point.cil.out.i[163507,163520] [2021-11-07 00:53:15,567 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 00:53:15,592 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 00:53:15,678 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 00:53:15,853 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_1061a454-a68a-4c76-8345-1d3c2c16ba23/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_synctty.ko-entry_point.cil.out.i[163507,163520] [2021-11-07 00:53:15,986 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 00:53:16,006 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 00:53:16,235 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_1061a454-a68a-4c76-8345-1d3c2c16ba23/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_synctty.ko-entry_point.cil.out.i[163507,163520] [2021-11-07 00:53:16,353 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 00:53:16,464 INFO L208 MainTranslator]: Completed translation [2021-11-07 00:53:16,465 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:53:16 WrapperNode [2021-11-07 00:53:16,465 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 00:53:16,466 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 00:53:16,467 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 00:53:16,467 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 00:53:16,475 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:53:16" (1/1) ... [2021-11-07 00:53:16,556 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:53:16" (1/1) ... [2021-11-07 00:53:16,721 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 00:53:16,722 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 00:53:16,722 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 00:53:16,722 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 00:53:16,731 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:53:16" (1/1) ... [2021-11-07 00:53:16,731 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:53:16" (1/1) ... [2021-11-07 00:53:16,745 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:53:16" (1/1) ... [2021-11-07 00:53:16,745 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:53:16" (1/1) ... [2021-11-07 00:53:16,833 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:53:16" (1/1) ... [2021-11-07 00:53:16,869 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:53:16" (1/1) ... [2021-11-07 00:53:16,887 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:53:16" (1/1) ... [2021-11-07 00:53:16,915 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 00:53:16,918 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 00:53:16,918 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 00:53:16,921 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 00:53:16,922 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:53:16" (1/1) ... [2021-11-07 00:53:16,930 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 00:53:16,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061a454-a68a-4c76-8345-1d3c2c16ba23/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 00:53:16,955 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061a454-a68a-4c76-8345-1d3c2c16ba23/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 00:53:16,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061a454-a68a-4c76-8345-1d3c2c16ba23/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 00:53:17,013 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-07 00:53:17,013 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-07 00:53:17,013 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-07 00:53:17,014 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-07 00:53:17,014 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-07 00:53:17,014 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-07 00:53:17,014 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-07 00:53:17,014 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2021-11-07 00:53:17,014 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-07 00:53:17,015 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2021-11-07 00:53:17,015 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 00:53:17,015 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 00:53:17,015 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 00:53:17,015 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2021-11-07 00:53:17,016 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2021-11-07 00:53:17,016 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-07 00:53:17,016 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 00:53:17,016 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-07 00:53:17,016 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-07 00:53:17,016 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 00:53:17,017 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-07 00:53:17,017 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-07 00:53:17,017 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 00:53:17,017 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-07 00:53:17,017 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-07 00:53:17,017 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-07 00:53:17,018 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 00:53:17,018 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 00:53:33,844 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 00:53:33,845 INFO L299 CfgBuilder]: Removed 693 assume(true) statements. [2021-11-07 00:53:33,848 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:53:33 BoogieIcfgContainer [2021-11-07 00:53:33,848 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 00:53:33,849 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 00:53:33,850 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 00:53:33,852 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 00:53:33,853 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:53:14" (1/3) ... [2021-11-07 00:53:33,853 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b0536e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:53:33, skipping insertion in model container [2021-11-07 00:53:33,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:53:16" (2/3) ... [2021-11-07 00:53:33,854 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b0536e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:53:33, skipping insertion in model container [2021-11-07 00:53:33,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:53:33" (3/3) ... [2021-11-07 00:53:33,855 INFO L111 eAbstractionObserver]: Analyzing ICFG 205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_synctty.ko-entry_point.cil.out.i [2021-11-07 00:53:33,861 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 00:53:33,861 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 00:53:33,912 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 00:53:33,918 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 00:53:33,918 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 00:53:33,959 INFO L276 IsEmpty]: Start isEmpty. Operand has 718 states, 716 states have (on average 1.5237430167597765) internal successors, (1091), 717 states have internal predecessors, (1091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:53:33,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-07 00:53:33,970 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:53:33,970 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] [2021-11-07 00:53:33,971 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:53:33,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:53:33,976 INFO L85 PathProgramCache]: Analyzing trace with hash -47021832, now seen corresponding path program 1 times [2021-11-07 00:53:33,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:53:33,991 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1265185216] [2021-11-07 00:53:33,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:53:33,992 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:53:33,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061a454-a68a-4c76-8345-1d3c2c16ba23/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:53:33,995 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061a454-a68a-4c76-8345-1d3c2c16ba23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:53:34,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061a454-a68a-4c76-8345-1d3c2c16ba23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 00:53:34,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:53:34,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 00:53:34,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:53:34,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:53:34,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:53:34,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:53:34,800 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:53:34,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1265185216] [2021-11-07 00:53:34,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1265185216] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:53:34,802 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:53:34,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 00:53:34,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88966718] [2021-11-07 00:53:34,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 00:53:34,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:53:34,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 00:53:34,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 00:53:34,826 INFO L87 Difference]: Start difference. First operand has 718 states, 716 states have (on average 1.5237430167597765) internal successors, (1091), 717 states have internal predecessors, (1091), 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) [2021-11-07 00:53:36,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:53:36,518 INFO L93 Difference]: Finished difference Result 2704 states and 4139 transitions. [2021-11-07 00:53:36,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 00:53:36,520 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 [2021-11-07 00:53:36,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:53:36,545 INFO L225 Difference]: With dead ends: 2704 [2021-11-07 00:53:36,545 INFO L226 Difference]: Without dead ends: 1975 [2021-11-07 00:53:36,551 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 [2021-11-07 00:53:36,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1975 states. [2021-11-07 00:53:36,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1975 to 1975. [2021-11-07 00:53:36,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1975 states, 1974 states have (on average 1.4366767983789261) internal successors, (2836), 1974 states have internal predecessors, (2836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:53:36,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1975 states to 1975 states and 2836 transitions. [2021-11-07 00:53:36,698 INFO L78 Accepts]: Start accepts. Automaton has 1975 states and 2836 transitions. Word has length 36 [2021-11-07 00:53:36,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:53:36,699 INFO L470 AbstractCegarLoop]: Abstraction has 1975 states and 2836 transitions. [2021-11-07 00:53:36,699 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) [2021-11-07 00:53:36,700 INFO L276 IsEmpty]: Start isEmpty. Operand 1975 states and 2836 transitions. [2021-11-07 00:53:36,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-07 00:53:36,703 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:53:36,703 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] [2021-11-07 00:53:36,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061a454-a68a-4c76-8345-1d3c2c16ba23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 00:53:36,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061a454-a68a-4c76-8345-1d3c2c16ba23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:53:36,921 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:53:36,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:53:36,922 INFO L85 PathProgramCache]: Analyzing trace with hash 455138126, now seen corresponding path program 1 times [2021-11-07 00:53:36,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:53:36,923 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1061916597] [2021-11-07 00:53:36,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:53:36,923 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:53:36,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061a454-a68a-4c76-8345-1d3c2c16ba23/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:53:36,924 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061a454-a68a-4c76-8345-1d3c2c16ba23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:53:36,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061a454-a68a-4c76-8345-1d3c2c16ba23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 00:53:37,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:53:37,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 00:53:37,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:53:37,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:53:37,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:53:37,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:53:37,785 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:53:37,785 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1061916597] [2021-11-07 00:53:37,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1061916597] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:53:37,785 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:53:37,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-11-07 00:53:37,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549352064] [2021-11-07 00:53:37,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 00:53:37,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:53:37,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 00:53:37,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-07 00:53:37,789 INFO L87 Difference]: Start difference. First operand 1975 states and 2836 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) [2021-11-07 00:53:38,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:53:38,872 INFO L93 Difference]: Finished difference Result 5817 states and 8381 transitions. [2021-11-07 00:53:38,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 00:53:38,873 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 [2021-11-07 00:53:38,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:53:38,896 INFO L225 Difference]: With dead ends: 5817 [2021-11-07 00:53:38,896 INFO L226 Difference]: Without dead ends: 3889 [2021-11-07 00:53:38,900 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-07 00:53:38,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3889 states. [2021-11-07 00:53:39,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3889 to 3757. [2021-11-07 00:53:39,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3757 states, 3756 states have (on average 1.4440894568690097) internal successors, (5424), 3756 states have internal predecessors, (5424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:53:39,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3757 states to 3757 states and 5424 transitions. [2021-11-07 00:53:39,065 INFO L78 Accepts]: Start accepts. Automaton has 3757 states and 5424 transitions. Word has length 40 [2021-11-07 00:53:39,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:53:39,065 INFO L470 AbstractCegarLoop]: Abstraction has 3757 states and 5424 transitions. [2021-11-07 00:53:39,066 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) [2021-11-07 00:53:39,066 INFO L276 IsEmpty]: Start isEmpty. Operand 3757 states and 5424 transitions. [2021-11-07 00:53:39,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 00:53:39,073 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:53:39,073 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] [2021-11-07 00:53:39,090 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061a454-a68a-4c76-8345-1d3c2c16ba23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 00:53:39,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061a454-a68a-4c76-8345-1d3c2c16ba23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:53:39,290 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:53:39,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:53:39,291 INFO L85 PathProgramCache]: Analyzing trace with hash -573546119, now seen corresponding path program 1 times [2021-11-07 00:53:39,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:53:39,292 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [882896811] [2021-11-07 00:53:39,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:53:39,292 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:53:39,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061a454-a68a-4c76-8345-1d3c2c16ba23/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:53:39,293 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061a454-a68a-4c76-8345-1d3c2c16ba23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:53:39,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061a454-a68a-4c76-8345-1d3c2c16ba23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 00:53:39,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:53:39,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 00:53:39,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:53:40,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:53:40,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:53:40,235 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:53:40,235 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:53:40,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [882896811] [2021-11-07 00:53:40,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [882896811] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:53:40,236 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:53:40,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 00:53:40,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336159945] [2021-11-07 00:53:40,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 00:53:40,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:53:40,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 00:53:40,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:53:40,238 INFO L87 Difference]: Start difference. First operand 3757 states and 5424 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:53:40,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:53:40,617 INFO L93 Difference]: Finished difference Result 9155 states and 13254 transitions. [2021-11-07 00:53:40,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:53:40,617 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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 65 [2021-11-07 00:53:40,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:53:40,648 INFO L225 Difference]: With dead ends: 9155 [2021-11-07 00:53:40,649 INFO L226 Difference]: Without dead ends: 5451 [2021-11-07 00:53:40,655 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:53:40,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5451 states. [2021-11-07 00:53:40,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5451 to 5431. [2021-11-07 00:53:40,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5431 states, 5430 states have (on average 1.4484346224677715) internal successors, (7865), 5430 states have internal predecessors, (7865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:53:40,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5431 states to 5431 states and 7865 transitions. [2021-11-07 00:53:40,870 INFO L78 Accepts]: Start accepts. Automaton has 5431 states and 7865 transitions. Word has length 65 [2021-11-07 00:53:40,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:53:40,870 INFO L470 AbstractCegarLoop]: Abstraction has 5431 states and 7865 transitions. [2021-11-07 00:53:40,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:53:40,871 INFO L276 IsEmpty]: Start isEmpty. Operand 5431 states and 7865 transitions. [2021-11-07 00:53:40,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 00:53:40,877 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:53:40,878 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] [2021-11-07 00:53:40,901 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061a454-a68a-4c76-8345-1d3c2c16ba23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 00:53:41,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061a454-a68a-4c76-8345-1d3c2c16ba23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:53:41,096 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:53:41,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:53:41,097 INFO L85 PathProgramCache]: Analyzing trace with hash 164402874, now seen corresponding path program 1 times [2021-11-07 00:53:41,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:53:41,098 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1666910936] [2021-11-07 00:53:41,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:53:41,098 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:53:41,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061a454-a68a-4c76-8345-1d3c2c16ba23/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:53:41,099 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061a454-a68a-4c76-8345-1d3c2c16ba23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:53:41,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061a454-a68a-4c76-8345-1d3c2c16ba23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 00:53:41,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:53:41,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 00:53:41,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:53:41,983 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:53:41,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:53:42,214 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:53:42,214 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:53:42,214 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1666910936] [2021-11-07 00:53:42,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1666910936] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:53:42,214 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:53:42,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 00:53:42,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426993836] [2021-11-07 00:53:42,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 00:53:42,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:53:42,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 00:53:42,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:53:42,216 INFO L87 Difference]: Start difference. First operand 5431 states and 7865 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) [2021-11-07 00:53:42,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:53:42,557 INFO L93 Difference]: Finished difference Result 13019 states and 18862 transitions. [2021-11-07 00:53:42,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:53:42,558 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 [2021-11-07 00:53:42,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:53:42,601 INFO L225 Difference]: With dead ends: 13019 [2021-11-07 00:53:42,602 INFO L226 Difference]: Without dead ends: 7641 [2021-11-07 00:53:42,612 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 [2021-11-07 00:53:42,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7641 states. [2021-11-07 00:53:42,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7641 to 7618. [2021-11-07 00:53:42,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7618 states, 7617 states have (on average 1.4465012472101877) internal successors, (11018), 7617 states have internal predecessors, (11018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:53:42,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7618 states to 7618 states and 11018 transitions. [2021-11-07 00:53:42,990 INFO L78 Accepts]: Start accepts. Automaton has 7618 states and 11018 transitions. Word has length 75 [2021-11-07 00:53:42,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:53:42,991 INFO L470 AbstractCegarLoop]: Abstraction has 7618 states and 11018 transitions. [2021-11-07 00:53:42,992 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) [2021-11-07 00:53:42,992 INFO L276 IsEmpty]: Start isEmpty. Operand 7618 states and 11018 transitions. [2021-11-07 00:53:43,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-07 00:53:43,001 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:53:43,004 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] [2021-11-07 00:53:43,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061a454-a68a-4c76-8345-1d3c2c16ba23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 00:53:43,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061a454-a68a-4c76-8345-1d3c2c16ba23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:53:43,222 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:53:43,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:53:43,223 INFO L85 PathProgramCache]: Analyzing trace with hash -670573817, now seen corresponding path program 1 times [2021-11-07 00:53:43,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:53:43,224 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1420831419] [2021-11-07 00:53:43,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:53:43,224 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:53:43,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061a454-a68a-4c76-8345-1d3c2c16ba23/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:53:43,225 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061a454-a68a-4c76-8345-1d3c2c16ba23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:53:43,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061a454-a68a-4c76-8345-1d3c2c16ba23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 00:53:43,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:53:43,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 00:53:43,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:53:44,100 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 00:53:44,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:53:44,324 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 00:53:44,324 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:53:44,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1420831419] [2021-11-07 00:53:44,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1420831419] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:53:44,324 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:53:44,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-07 00:53:44,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087558136] [2021-11-07 00:53:44,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 00:53:44,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:53:44,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 00:53:44,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 00:53:44,327 INFO L87 Difference]: Start difference. First operand 7618 states and 11018 transitions. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:53:46,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:53:46,233 INFO L93 Difference]: Finished difference Result 12740 states and 18433 transitions. [2021-11-07 00:53:46,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 00:53:46,234 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 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 79 [2021-11-07 00:53:46,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:53:46,264 INFO L225 Difference]: With dead ends: 12740 [2021-11-07 00:53:46,264 INFO L226 Difference]: Without dead ends: 5155 [2021-11-07 00:53:46,275 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 00:53:46,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5155 states. [2021-11-07 00:53:46,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5155 to 5099. [2021-11-07 00:53:46,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5099 states, 5098 states have (on average 1.4464495880737545) internal successors, (7374), 5098 states have internal predecessors, (7374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:53:46,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5099 states to 5099 states and 7374 transitions. [2021-11-07 00:53:46,527 INFO L78 Accepts]: Start accepts. Automaton has 5099 states and 7374 transitions. Word has length 79 [2021-11-07 00:53:46,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:53:46,528 INFO L470 AbstractCegarLoop]: Abstraction has 5099 states and 7374 transitions. [2021-11-07 00:53:46,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:53:46,528 INFO L276 IsEmpty]: Start isEmpty. Operand 5099 states and 7374 transitions. [2021-11-07 00:53:46,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-07 00:53:46,535 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:53:46,535 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] [2021-11-07 00:53:46,554 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061a454-a68a-4c76-8345-1d3c2c16ba23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 00:53:46,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061a454-a68a-4c76-8345-1d3c2c16ba23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:53:46,754 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:53:46,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:53:46,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1268588229, now seen corresponding path program 1 times [2021-11-07 00:53:46,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:53:46,755 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [682190819] [2021-11-07 00:53:46,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:53:46,755 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:53:46,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061a454-a68a-4c76-8345-1d3c2c16ba23/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:53:46,757 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061a454-a68a-4c76-8345-1d3c2c16ba23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:53:46,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061a454-a68a-4c76-8345-1d3c2c16ba23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 00:53:47,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:53:47,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 00:53:47,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:53:47,631 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:53:47,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:53:47,851 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:53:47,851 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:53:47,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [682190819] [2021-11-07 00:53:47,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [682190819] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:53:47,852 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:53:47,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 00:53:47,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800477725] [2021-11-07 00:53:47,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 00:53:47,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:53:47,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 00:53:47,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 00:53:47,854 INFO L87 Difference]: Start difference. First operand 5099 states and 7374 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:53:50,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:53:50,058 INFO L93 Difference]: Finished difference Result 12902 states and 18877 transitions. [2021-11-07 00:53:50,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 00:53:50,062 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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 79 [2021-11-07 00:53:50,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:53:50,106 INFO L225 Difference]: With dead ends: 12902 [2021-11-07 00:53:50,106 INFO L226 Difference]: Without dead ends: 7871 [2021-11-07 00:53:50,115 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 00:53:50,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7871 states. [2021-11-07 00:53:50,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7871 to 7803. [2021-11-07 00:53:50,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7803 states, 7802 states have (on average 1.4537298128684952) internal successors, (11342), 7802 states have internal predecessors, (11342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:53:50,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7803 states to 7803 states and 11342 transitions. [2021-11-07 00:53:50,479 INFO L78 Accepts]: Start accepts. Automaton has 7803 states and 11342 transitions. Word has length 79 [2021-11-07 00:53:50,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:53:50,479 INFO L470 AbstractCegarLoop]: Abstraction has 7803 states and 11342 transitions. [2021-11-07 00:53:50,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:53:50,481 INFO L276 IsEmpty]: Start isEmpty. Operand 7803 states and 11342 transitions. [2021-11-07 00:53:50,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-07 00:53:50,491 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:53:50,491 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] [2021-11-07 00:53:50,514 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061a454-a68a-4c76-8345-1d3c2c16ba23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 00:53:50,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061a454-a68a-4c76-8345-1d3c2c16ba23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:53:50,711 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:53:50,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:53:50,712 INFO L85 PathProgramCache]: Analyzing trace with hash 108752748, now seen corresponding path program 1 times [2021-11-07 00:53:50,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:53:50,713 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [953606097] [2021-11-07 00:53:50,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:53:50,713 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:53:50,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061a454-a68a-4c76-8345-1d3c2c16ba23/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:53:50,715 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061a454-a68a-4c76-8345-1d3c2c16ba23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:53:50,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061a454-a68a-4c76-8345-1d3c2c16ba23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 00:53:51,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:53:51,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 00:53:51,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:53:51,538 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 00:53:51,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:53:51,704 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 00:53:51,704 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:53:51,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [953606097] [2021-11-07 00:53:51,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [953606097] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:53:51,705 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:53:51,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 00:53:51,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690389298] [2021-11-07 00:53:51,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 00:53:51,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:53:51,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 00:53:51,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:53:51,706 INFO L87 Difference]: Start difference. First operand 7803 states and 11342 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:53:52,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:53:52,332 INFO L93 Difference]: Finished difference Result 18631 states and 27167 transitions. [2021-11-07 00:53:52,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:53:52,333 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 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 80 [2021-11-07 00:53:52,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:53:52,369 INFO L225 Difference]: With dead ends: 18631 [2021-11-07 00:53:52,370 INFO L226 Difference]: Without dead ends: 14614 [2021-11-07 00:53:52,378 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:53:52,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14614 states. [2021-11-07 00:53:52,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14614 to 7939. [2021-11-07 00:53:52,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7939 states, 7938 states have (on average 1.4459561602418745) internal successors, (11478), 7938 states have internal predecessors, (11478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:53:52,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7939 states to 7939 states and 11478 transitions. [2021-11-07 00:53:52,795 INFO L78 Accepts]: Start accepts. Automaton has 7939 states and 11478 transitions. Word has length 80 [2021-11-07 00:53:52,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:53:52,796 INFO L470 AbstractCegarLoop]: Abstraction has 7939 states and 11478 transitions. [2021-11-07 00:53:52,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:53:52,797 INFO L276 IsEmpty]: Start isEmpty. Operand 7939 states and 11478 transitions. [2021-11-07 00:53:52,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-07 00:53:52,807 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:53:52,808 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] [2021-11-07 00:53:52,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061a454-a68a-4c76-8345-1d3c2c16ba23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 00:53:53,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061a454-a68a-4c76-8345-1d3c2c16ba23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:53:53,026 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:53:53,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:53:53,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1900549131, now seen corresponding path program 1 times [2021-11-07 00:53:53,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:53:53,027 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1263459020] [2021-11-07 00:53:53,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:53:53,027 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:53:53,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061a454-a68a-4c76-8345-1d3c2c16ba23/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:53:53,028 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061a454-a68a-4c76-8345-1d3c2c16ba23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:53:53,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061a454-a68a-4c76-8345-1d3c2c16ba23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 00:53:53,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:53:53,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 00:53:53,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:53:53,970 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 00:53:53,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:53:54,236 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 00:53:54,236 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:53:54,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1263459020] [2021-11-07 00:53:54,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1263459020] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:53:54,237 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:53:54,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 00:53:54,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883031546] [2021-11-07 00:53:54,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 00:53:54,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:53:54,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 00:53:54,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-07 00:53:54,241 INFO L87 Difference]: Start difference. First operand 7939 states and 11478 transitions. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:53:58,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:53:58,686 INFO L93 Difference]: Finished difference Result 22281 states and 32256 transitions. [2021-11-07 00:53:58,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 00:53:58,686 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-07 00:53:58,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:53:58,722 INFO L225 Difference]: With dead ends: 22281 [2021-11-07 00:53:58,722 INFO L226 Difference]: Without dead ends: 14410 [2021-11-07 00:53:58,736 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-07 00:53:58,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14410 states. [2021-11-07 00:53:59,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14410 to 7735. [2021-11-07 00:53:59,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7735 states, 7734 states have (on average 1.4313421256788208) internal successors, (11070), 7734 states have internal predecessors, (11070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:53:59,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7735 states to 7735 states and 11070 transitions. [2021-11-07 00:53:59,219 INFO L78 Accepts]: Start accepts. Automaton has 7735 states and 11070 transitions. Word has length 82 [2021-11-07 00:53:59,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:53:59,220 INFO L470 AbstractCegarLoop]: Abstraction has 7735 states and 11070 transitions. [2021-11-07 00:53:59,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:53:59,221 INFO L276 IsEmpty]: Start isEmpty. Operand 7735 states and 11070 transitions. [2021-11-07 00:53:59,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-07 00:53:59,240 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:53:59,240 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-11-07 00:53:59,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061a454-a68a-4c76-8345-1d3c2c16ba23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 00:53:59,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061a454-a68a-4c76-8345-1d3c2c16ba23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:53:59,461 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:53:59,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:53:59,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1172311756, now seen corresponding path program 1 times [2021-11-07 00:53:59,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:53:59,462 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [203607988] [2021-11-07 00:53:59,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:53:59,462 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:53:59,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061a454-a68a-4c76-8345-1d3c2c16ba23/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:53:59,464 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061a454-a68a-4c76-8345-1d3c2c16ba23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:53:59,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061a454-a68a-4c76-8345-1d3c2c16ba23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 00:54:00,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:54:00,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 603 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-07 00:54:00,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:54:00,768 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-07 00:54:00,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 41 [2021-11-07 00:54:00,965 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 00:54:00,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:54:01,673 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 00:54:01,673 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:54:01,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [203607988] [2021-11-07 00:54:01,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [203607988] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:54:01,673 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:54:01,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 15 [2021-11-07 00:54:01,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440528324] [2021-11-07 00:54:01,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-07 00:54:01,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:54:01,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-07 00:54:01,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-11-07 00:54:01,675 INFO L87 Difference]: Start difference. First operand 7735 states and 11070 transitions. Second operand has 15 states, 15 states have (on average 7.333333333333333) internal successors, (110), 15 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:14,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:56:14,911 INFO L93 Difference]: Finished difference Result 37078 states and 54325 transitions. [2021-11-07 00:56:14,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 00:56:14,913 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 7.333333333333333) internal successors, (110), 15 states have internal predecessors, (110), 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 103 [2021-11-07 00:56:14,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:56:14,981 INFO L225 Difference]: With dead ends: 37078 [2021-11-07 00:56:14,982 INFO L226 Difference]: Without dead ends: 29411 [2021-11-07 00:56:14,997 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=147, Invalid=359, Unknown=0, NotChecked=0, Total=506 [2021-11-07 00:56:15,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29411 states. [2021-11-07 00:56:15,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29411 to 7815. [2021-11-07 00:56:15,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7815 states, 7814 states have (on average 1.4289736370616841) internal successors, (11166), 7814 states have internal predecessors, (11166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:15,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7815 states to 7815 states and 11166 transitions. [2021-11-07 00:56:15,852 INFO L78 Accepts]: Start accepts. Automaton has 7815 states and 11166 transitions. Word has length 103 [2021-11-07 00:56:15,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:56:15,853 INFO L470 AbstractCegarLoop]: Abstraction has 7815 states and 11166 transitions. [2021-11-07 00:56:15,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.333333333333333) internal successors, (110), 15 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:15,853 INFO L276 IsEmpty]: Start isEmpty. Operand 7815 states and 11166 transitions. [2021-11-07 00:56:15,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-07 00:56:15,947 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:56:15,948 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-11-07 00:56:15,977 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061a454-a68a-4c76-8345-1d3c2c16ba23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 00:56:16,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061a454-a68a-4c76-8345-1d3c2c16ba23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:56:16,157 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:56:16,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:56:16,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1595958478, now seen corresponding path program 1 times [2021-11-07 00:56:16,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:56:16,158 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1492965440] [2021-11-07 00:56:16,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:16,158 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:56:16,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061a454-a68a-4c76-8345-1d3c2c16ba23/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:56:16,159 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061a454-a68a-4c76-8345-1d3c2c16ba23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:56:16,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061a454-a68a-4c76-8345-1d3c2c16ba23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 00:56:16,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:56:17,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 00:56:17,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:56:17,344 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 00:56:17,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:56:17,575 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 00:56:17,576 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:56:17,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1492965440] [2021-11-07 00:56:17,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1492965440] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:56:17,576 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:56:17,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 00:56:17,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112332816] [2021-11-07 00:56:17,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 00:56:17,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:56:17,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 00:56:17,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 00:56:17,578 INFO L87 Difference]: Start difference. First operand 7815 states and 11166 transitions. Second operand has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:19,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:56:19,742 INFO L93 Difference]: Finished difference Result 37005 states and 53049 transitions. [2021-11-07 00:56:19,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 00:56:19,747 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 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 103 [2021-11-07 00:56:19,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:56:19,807 INFO L225 Difference]: With dead ends: 37005 [2021-11-07 00:56:19,808 INFO L226 Difference]: Without dead ends: 29258 [2021-11-07 00:56:19,822 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 00:56:19,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29258 states. [2021-11-07 00:56:20,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29258 to 7879. [2021-11-07 00:56:20,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7879 states, 7878 states have (on average 1.4254887027164256) internal successors, (11230), 7878 states have internal predecessors, (11230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:20,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7879 states to 7879 states and 11230 transitions. [2021-11-07 00:56:20,949 INFO L78 Accepts]: Start accepts. Automaton has 7879 states and 11230 transitions. Word has length 103 [2021-11-07 00:56:20,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:56:20,949 INFO L470 AbstractCegarLoop]: Abstraction has 7879 states and 11230 transitions. [2021-11-07 00:56:20,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:20,950 INFO L276 IsEmpty]: Start isEmpty. Operand 7879 states and 11230 transitions. [2021-11-07 00:56:20,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-07 00:56:20,960 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:56:20,961 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-11-07 00:56:21,002 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061a454-a68a-4c76-8345-1d3c2c16ba23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 00:56:21,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061a454-a68a-4c76-8345-1d3c2c16ba23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:56:21,182 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:56:21,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:56:21,183 INFO L85 PathProgramCache]: Analyzing trace with hash -159411009, now seen corresponding path program 1 times [2021-11-07 00:56:21,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:56:21,184 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [705764885] [2021-11-07 00:56:21,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:21,184 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:56:21,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061a454-a68a-4c76-8345-1d3c2c16ba23/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:56:21,185 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061a454-a68a-4c76-8345-1d3c2c16ba23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:56:21,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061a454-a68a-4c76-8345-1d3c2c16ba23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 00:56:22,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:56:22,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 620 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-07 00:56:22,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:56:22,753 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 00:56:22,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:56:23,479 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 00:56:23,479 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:56:23,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [705764885] [2021-11-07 00:56:23,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [705764885] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:56:23,480 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:56:23,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 16 [2021-11-07 00:56:23,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829835977] [2021-11-07 00:56:23,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 00:56:23,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:56:23,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 00:56:23,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-11-07 00:56:23,483 INFO L87 Difference]: Start difference. First operand 7879 states and 11230 transitions. Second operand has 16 states, 16 states have (on average 7.3125) internal successors, (117), 16 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:37,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:56:37,789 INFO L93 Difference]: Finished difference Result 81965 states and 118881 transitions. [2021-11-07 00:56:37,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-07 00:56:37,791 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 7.3125) internal successors, (117), 16 states have internal predecessors, (117), 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 106 [2021-11-07 00:56:37,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:56:37,945 INFO L225 Difference]: With dead ends: 81965 [2021-11-07 00:56:37,945 INFO L226 Difference]: Without dead ends: 74154 [2021-11-07 00:56:37,970 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=459, Invalid=1263, Unknown=0, NotChecked=0, Total=1722 [2021-11-07 00:56:38,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74154 states. [2021-11-07 00:56:39,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74154 to 7927. [2021-11-07 00:56:39,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7927 states, 7926 states have (on average 1.4188745899571031) internal successors, (11246), 7926 states have internal predecessors, (11246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:39,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7927 states to 7927 states and 11246 transitions. [2021-11-07 00:56:39,545 INFO L78 Accepts]: Start accepts. Automaton has 7927 states and 11246 transitions. Word has length 106 [2021-11-07 00:56:39,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:56:39,545 INFO L470 AbstractCegarLoop]: Abstraction has 7927 states and 11246 transitions. [2021-11-07 00:56:39,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.3125) internal successors, (117), 16 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:39,545 INFO L276 IsEmpty]: Start isEmpty. Operand 7927 states and 11246 transitions. [2021-11-07 00:56:39,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-07 00:56:39,555 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:56:39,555 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] [2021-11-07 00:56:39,581 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061a454-a68a-4c76-8345-1d3c2c16ba23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 00:56:39,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061a454-a68a-4c76-8345-1d3c2c16ba23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:56:39,778 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:56:39,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:56:39,778 INFO L85 PathProgramCache]: Analyzing trace with hash 5405906, now seen corresponding path program 1 times [2021-11-07 00:56:39,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:56:39,779 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [934515144] [2021-11-07 00:56:39,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:39,779 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:56:39,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061a454-a68a-4c76-8345-1d3c2c16ba23/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:56:39,780 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061a454-a68a-4c76-8345-1d3c2c16ba23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:56:39,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061a454-a68a-4c76-8345-1d3c2c16ba23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 00:56:40,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:56:40,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 647 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 00:56:40,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:56:40,918 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 00:56:40,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:56:41,213 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 00:56:41,214 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:56:41,214 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [934515144] [2021-11-07 00:56:41,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [934515144] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:56:41,214 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:56:41,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 00:56:41,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481511935] [2021-11-07 00:56:41,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 00:56:41,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:56:41,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 00:56:41,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 00:56:41,216 INFO L87 Difference]: Start difference. First operand 7927 states and 11246 transitions. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:46,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:56:46,470 INFO L93 Difference]: Finished difference Result 20366 states and 28787 transitions. [2021-11-07 00:56:46,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 00:56:46,474 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 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 114 [2021-11-07 00:56:46,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:56:46,490 INFO L225 Difference]: With dead ends: 20366 [2021-11-07 00:56:46,490 INFO L226 Difference]: Without dead ends: 12507 [2021-11-07 00:56:46,499 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 00:56:46,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12507 states. [2021-11-07 00:56:47,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12507 to 7943. [2021-11-07 00:56:47,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7943 states, 7942 states have (on average 1.418030722739864) internal successors, (11262), 7942 states have internal predecessors, (11262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:47,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7943 states to 7943 states and 11262 transitions. [2021-11-07 00:56:47,723 INFO L78 Accepts]: Start accepts. Automaton has 7943 states and 11262 transitions. Word has length 114 [2021-11-07 00:56:47,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:56:47,724 INFO L470 AbstractCegarLoop]: Abstraction has 7943 states and 11262 transitions. [2021-11-07 00:56:47,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:56:47,724 INFO L276 IsEmpty]: Start isEmpty. Operand 7943 states and 11262 transitions. [2021-11-07 00:56:47,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-07 00:56:47,735 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:56:47,735 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-11-07 00:56:47,757 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061a454-a68a-4c76-8345-1d3c2c16ba23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-11-07 00:56:47,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061a454-a68a-4c76-8345-1d3c2c16ba23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:56:47,950 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:56:47,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:56:47,950 INFO L85 PathProgramCache]: Analyzing trace with hash -2132636173, now seen corresponding path program 1 times [2021-11-07 00:56:47,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:56:47,951 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [899218490] [2021-11-07 00:56:47,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:56:47,952 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:56:47,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061a454-a68a-4c76-8345-1d3c2c16ba23/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:56:47,952 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061a454-a68a-4c76-8345-1d3c2c16ba23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:56:47,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061a454-a68a-4c76-8345-1d3c2c16ba23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 00:56:48,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:56:49,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 701 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 00:56:49,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:56:49,514 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 00:56:49,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:56:50,079 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 00:56:50,080 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:56:50,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [899218490] [2021-11-07 00:56:50,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [899218490] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:56:50,080 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:56:50,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 00:56:50,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342854069] [2021-11-07 00:56:50,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 00:56:50,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:56:50,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 00:56:50,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-07 00:56:50,082 INFO L87 Difference]: Start difference. First operand 7943 states and 11262 transitions. Second operand has 8 states, 8 states have (on average 23.0) internal successors, (184), 8 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:57:05,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:57:05,991 INFO L93 Difference]: Finished difference Result 58252 states and 83472 transitions. [2021-11-07 00:57:05,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 00:57:05,991 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 23.0) internal successors, (184), 8 states have internal predecessors, (184), 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 120 [2021-11-07 00:57:05,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:57:06,085 INFO L225 Difference]: With dead ends: 58252 [2021-11-07 00:57:06,085 INFO L226 Difference]: Without dead ends: 54063 [2021-11-07 00:57:06,098 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-11-07 00:57:06,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54063 states. [2021-11-07 00:57:09,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54063 to 24347. [2021-11-07 00:57:09,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24347 states, 24346 states have (on average 1.4253676168569787) internal successors, (34702), 24346 states have internal predecessors, (34702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:57:09,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24347 states to 24347 states and 34702 transitions. [2021-11-07 00:57:09,867 INFO L78 Accepts]: Start accepts. Automaton has 24347 states and 34702 transitions. Word has length 120 [2021-11-07 00:57:09,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:57:09,867 INFO L470 AbstractCegarLoop]: Abstraction has 24347 states and 34702 transitions. [2021-11-07 00:57:09,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 23.0) internal successors, (184), 8 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:57:09,867 INFO L276 IsEmpty]: Start isEmpty. Operand 24347 states and 34702 transitions. [2021-11-07 00:57:09,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-07 00:57:09,874 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:57:09,874 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] [2021-11-07 00:57:09,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061a454-a68a-4c76-8345-1d3c2c16ba23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 00:57:10,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061a454-a68a-4c76-8345-1d3c2c16ba23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:57:10,090 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:57:10,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:57:10,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1820118391, now seen corresponding path program 1 times [2021-11-07 00:57:10,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:57:10,092 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1451648895] [2021-11-07 00:57:10,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:57:10,092 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:57:10,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061a454-a68a-4c76-8345-1d3c2c16ba23/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:57:10,093 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061a454-a68a-4c76-8345-1d3c2c16ba23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:57:10,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061a454-a68a-4c76-8345-1d3c2c16ba23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 00:57:11,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:57:11,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 680 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 00:57:11,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:57:11,369 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 00:57:11,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:57:11,702 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 00:57:11,702 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:57:11,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1451648895] [2021-11-07 00:57:11,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1451648895] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:57:11,703 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:57:11,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 00:57:11,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430660522] [2021-11-07 00:57:11,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 00:57:11,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:57:11,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 00:57:11,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 00:57:11,705 INFO L87 Difference]: Start difference. First operand 24347 states and 34702 transitions. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:57:21,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:57:21,932 INFO L93 Difference]: Finished difference Result 75570 states and 107373 transitions. [2021-11-07 00:57:21,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-07 00:57:21,933 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2021-11-07 00:57:21,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:57:22,006 INFO L225 Difference]: With dead ends: 75570 [2021-11-07 00:57:22,006 INFO L226 Difference]: Without dead ends: 51291 [2021-11-07 00:57:22,023 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2021-11-07 00:57:22,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51291 states. [2021-11-07 00:57:25,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51291 to 24347. [2021-11-07 00:57:25,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24347 states, 24346 states have (on average 1.4253676168569787) internal successors, (34702), 24346 states have internal predecessors, (34702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:57:25,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24347 states to 24347 states and 34702 transitions. [2021-11-07 00:57:25,846 INFO L78 Accepts]: Start accepts. Automaton has 24347 states and 34702 transitions. Word has length 121 [2021-11-07 00:57:25,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:57:25,846 INFO L470 AbstractCegarLoop]: Abstraction has 24347 states and 34702 transitions. [2021-11-07 00:57:25,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:57:25,846 INFO L276 IsEmpty]: Start isEmpty. Operand 24347 states and 34702 transitions. [2021-11-07 00:57:25,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-07 00:57:25,854 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:57:25,854 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:57:25,873 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061a454-a68a-4c76-8345-1d3c2c16ba23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 00:57:26,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061a454-a68a-4c76-8345-1d3c2c16ba23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 00:57:26,055 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:57:26,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:57:26,055 INFO L85 PathProgramCache]: Analyzing trace with hash -331078702, now seen corresponding path program 1 times [2021-11-07 00:57:26,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 00:57:26,056 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [101351398] [2021-11-07 00:57:26,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:57:26,057 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 00:57:26,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061a454-a68a-4c76-8345-1d3c2c16ba23/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 00:57:26,058 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061a454-a68a-4c76-8345-1d3c2c16ba23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 00:57:26,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1061a454-a68a-4c76-8345-1d3c2c16ba23/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 00:57:27,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:57:27,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 705 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 00:57:27,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 00:57:27,598 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 00:57:27,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 00:57:27,880 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 00:57:27,880 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 00:57:27,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [101351398] [2021-11-07 00:57:27,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [101351398] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 00:57:27,880 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:57:27,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 00:57:27,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739697647] [2021-11-07 00:57:27,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 00:57:27,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 00:57:27,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 00:57:27,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 00:57:27,882 INFO L87 Difference]: Start difference. First operand 24347 states and 34702 transitions. Second operand has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 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)