./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--icplus--ipg.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_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/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_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--icplus--ipg.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/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_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/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 796dd9af134a9ffa7d65525922d125c3e75a459db15e4643a4f13ca47d95e4ce --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:23:06,087 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:23:06,089 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:23:06,128 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:23:06,129 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:23:06,132 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:23:06,134 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:23:06,138 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:23:06,141 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:23:06,146 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:23:06,147 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:23:06,149 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:23:06,150 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:23:06,152 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:23:06,154 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:23:06,160 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:23:06,162 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:23:06,163 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:23:06,168 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:23:06,176 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:23:06,177 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:23:06,179 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:23:06,182 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:23:06,183 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:23:06,191 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:23:06,192 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:23:06,192 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:23:06,194 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:23:06,195 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:23:06,196 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:23:06,196 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:23:06,197 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:23:06,199 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:23:06,200 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:23:06,201 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:23:06,202 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:23:06,202 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:23:06,203 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:23:06,203 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:23:06,204 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:23:06,204 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:23:06,205 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-07 01:23:06,252 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:23:06,253 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:23:06,254 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:23:06,254 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:23:06,254 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:23:06,254 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:23:06,255 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:23:06,255 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:23:06,261 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:23:06,261 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:23:06,262 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:23:06,262 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:23:06,263 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:23:06,263 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:23:06,263 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:23:06,264 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:23:06,264 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:23:06,264 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:23:06,265 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:23:06,265 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:23:06,265 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:23:06,265 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:23:06,265 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:23:06,265 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:23:06,266 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:23:06,266 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:23:06,266 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:23:06,266 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:23:06,266 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:23:06,267 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:23:06,267 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:23:06,267 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:23:06,267 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:23:06,267 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:23:06,268 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:23:06,268 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:23:06,268 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_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 796dd9af134a9ffa7d65525922d125c3e75a459db15e4643a4f13ca47d95e4ce [2021-11-07 01:23:06,516 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:23:06,545 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:23:06,547 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:23:06,549 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:23:06,550 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:23:06,551 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--icplus--ipg.ko-entry_point.cil.out.i [2021-11-07 01:23:06,637 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8/data/dc90779ed/88b7e86f5f574cab8b37655d440fa16e/FLAGb4abe9daa [2021-11-07 01:23:07,441 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:23:07,442 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--icplus--ipg.ko-entry_point.cil.out.i [2021-11-07 01:23:07,497 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8/data/dc90779ed/88b7e86f5f574cab8b37655d440fa16e/FLAGb4abe9daa [2021-11-07 01:23:07,964 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8/data/dc90779ed/88b7e86f5f574cab8b37655d440fa16e [2021-11-07 01:23:07,967 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:23:07,968 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:23:07,970 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:23:07,970 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:23:07,973 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:23:07,974 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:23:07" (1/1) ... [2021-11-07 01:23:07,975 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@135ebe71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:23:07, skipping insertion in model container [2021-11-07 01:23:07,976 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:23:07" (1/1) ... [2021-11-07 01:23:07,983 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:23:08,117 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:23:09,801 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 01:23:09,803 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 01:23:09,986 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 01:23:10,216 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_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--icplus--ipg.ko-entry_point.cil.out.i[263179,263192] [2021-11-07 01:23:10,280 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:23:10,310 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 01:23:10,311 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@71869fcf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:23:10, skipping insertion in model container [2021-11-07 01:23:10,311 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:23:10,312 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:23:10,318 INFO L168 Benchmark]: Toolchain (without parser) took 2344.56 ms. Allocated memory is still 138.4 MB. Free memory was 92.5 MB in the beginning and 67.8 MB in the end (delta: 24.7 MB). Peak memory consumption was 30.9 MB. Max. memory is 16.1 GB. [2021-11-07 01:23:10,319 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 88.1 MB. Free memory was 46.6 MB in the beginning and 46.5 MB in the end (delta: 44.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:23:10,319 INFO L168 Benchmark]: CACSL2BoogieTranslator took 2341.82 ms. Allocated memory is still 138.4 MB. Free memory was 92.2 MB in the beginning and 67.8 MB in the end (delta: 24.4 MB). Peak memory consumption was 30.9 MB. Max. memory is 16.1 GB. [2021-11-07 01:23:10,321 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 88.1 MB. Free memory was 46.6 MB in the beginning and 46.5 MB in the end (delta: 44.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 2341.82 ms. Allocated memory is still 138.4 MB. Free memory was 92.2 MB in the beginning and 67.8 MB in the end (delta: 24.4 MB). Peak memory consumption was 30.9 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 6245]: 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_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/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_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--icplus--ipg.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/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_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/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 796dd9af134a9ffa7d65525922d125c3e75a459db15e4643a4f13ca47d95e4ce --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:23:12,562 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:23:12,566 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:23:12,621 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:23:12,622 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:23:12,627 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:23:12,629 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:23:12,634 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:23:12,637 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:23:12,647 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:23:12,649 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:23:12,650 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:23:12,651 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:23:12,653 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:23:12,656 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:23:12,661 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:23:12,663 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:23:12,664 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:23:12,666 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:23:12,672 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:23:12,675 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:23:12,676 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:23:12,679 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:23:12,681 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:23:12,687 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:23:12,687 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:23:12,687 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:23:12,689 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:23:12,690 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:23:12,691 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:23:12,691 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:23:12,692 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:23:12,694 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:23:12,695 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:23:12,696 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:23:12,696 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:23:12,697 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:23:12,697 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:23:12,707 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:23:12,709 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:23:12,710 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:23:12,711 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-07 01:23:12,756 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:23:12,756 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:23:12,757 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:23:12,758 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:23:12,758 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:23:12,758 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:23:12,758 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:23:12,759 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:23:12,759 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:23:12,760 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:23:12,761 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:23:12,762 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:23:12,762 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:23:12,762 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:23:12,762 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:23:12,762 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:23:12,763 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:23:12,763 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:23:12,763 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:23:12,763 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:23:12,764 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:23:12,764 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:23:12,764 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:23:12,764 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:23:12,765 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:23:12,765 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:23:12,765 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:23:12,765 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:23:12,766 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:23:12,766 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:23:12,766 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:23:12,766 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:23:12,767 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_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 796dd9af134a9ffa7d65525922d125c3e75a459db15e4643a4f13ca47d95e4ce [2021-11-07 01:23:13,159 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:23:13,193 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:23:13,196 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:23:13,197 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:23:13,198 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:23:13,199 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--icplus--ipg.ko-entry_point.cil.out.i [2021-11-07 01:23:13,270 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8/data/bab2fcdcc/832ed51ddd7346a88d7073ad498c3843/FLAGe142a8de4 [2021-11-07 01:23:14,280 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:23:14,281 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--icplus--ipg.ko-entry_point.cil.out.i [2021-11-07 01:23:14,320 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8/data/bab2fcdcc/832ed51ddd7346a88d7073ad498c3843/FLAGe142a8de4 [2021-11-07 01:23:14,703 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8/data/bab2fcdcc/832ed51ddd7346a88d7073ad498c3843 [2021-11-07 01:23:14,705 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:23:14,706 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:23:14,708 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:23:14,708 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:23:14,711 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:23:14,712 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:23:14" (1/1) ... [2021-11-07 01:23:14,713 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58194df7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:23:14, skipping insertion in model container [2021-11-07 01:23:14,713 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:23:14" (1/1) ... [2021-11-07 01:23:14,720 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:23:14,861 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:23:16,832 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_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--icplus--ipg.ko-entry_point.cil.out.i[263179,263192] [2021-11-07 01:23:16,895 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:23:16,936 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:23:17,023 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:23:17,399 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_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--icplus--ipg.ko-entry_point.cil.out.i[263179,263192] [2021-11-07 01:23:17,428 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:23:17,469 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:23:17,976 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_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--icplus--ipg.ko-entry_point.cil.out.i[263179,263192] [2021-11-07 01:23:17,983 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:23:18,162 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:23:18,163 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:23:18 WrapperNode [2021-11-07 01:23:18,163 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:23:18,165 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:23:18,165 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:23:18,165 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:23:18,172 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:23:18" (1/1) ... [2021-11-07 01:23:18,288 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:23:18" (1/1) ... [2021-11-07 01:23:19,236 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:23:19,237 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:23:19,238 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:23:19,238 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:23:19,246 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:23:18" (1/1) ... [2021-11-07 01:23:19,247 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:23:18" (1/1) ... [2021-11-07 01:23:19,439 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:23:18" (1/1) ... [2021-11-07 01:23:19,445 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:23:18" (1/1) ... [2021-11-07 01:23:20,306 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:23:18" (1/1) ... [2021-11-07 01:23:20,453 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:23:18" (1/1) ... [2021-11-07 01:23:20,578 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:23:18" (1/1) ... [2021-11-07 01:23:20,841 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:23:20,843 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:23:20,843 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:23:20,843 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:23:20,844 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:23:18" (1/1) ... [2021-11-07 01:23:20,858 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:23:20,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:23:20,883 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:23:20,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:23:20,931 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-07 01:23:20,931 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-07 01:23:20,931 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-07 01:23:20,931 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-07 01:23:20,931 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-07 01:23:20,932 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-07 01:23:20,932 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:23:20,932 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 01:23:20,932 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-07 01:23:20,932 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-07 01:23:20,933 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-07 01:23:20,933 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 01:23:20,933 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-07 01:23:20,933 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-07 01:23:20,933 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2021-11-07 01:23:20,933 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:23:20,934 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-07 01:23:20,934 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-07 01:23:20,934 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-07 01:23:20,934 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2021-11-07 01:23:20,934 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-07 01:23:20,934 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2021-11-07 01:23:20,935 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 01:23:20,935 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 01:23:20,935 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2021-11-07 01:23:20,935 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2021-11-07 01:23:20,935 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-07 01:23:20,935 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-07 01:23:20,936 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:23:20,936 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:26:20,577 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:26:20,578 INFO L299 CfgBuilder]: Removed 6500 assume(true) statements. [2021-11-07 01:26:20,585 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:26:20 BoogieIcfgContainer [2021-11-07 01:26:20,585 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:26:20,587 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:26:20,587 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:26:20,590 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:26:20,591 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:23:14" (1/3) ... [2021-11-07 01:26:20,591 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14bb09e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:26:20, skipping insertion in model container [2021-11-07 01:26:20,592 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:23:18" (2/3) ... [2021-11-07 01:26:20,592 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14bb09e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:26:20, skipping insertion in model container [2021-11-07 01:26:20,592 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:26:20" (3/3) ... [2021-11-07 01:26:20,594 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--icplus--ipg.ko-entry_point.cil.out.i [2021-11-07 01:26:20,599 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:26:20,599 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 23 error locations. [2021-11-07 01:26:20,806 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:26:20,824 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 01:26:20,827 INFO L340 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2021-11-07 01:26:20,924 INFO L276 IsEmpty]: Start isEmpty. Operand has 5295 states, 5271 states have (on average 1.3200531208499335) internal successors, (6958), 5294 states have internal predecessors, (6958), 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 01:26:20,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-07 01:26:20,949 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:26:20,950 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:26:20,950 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 20 more)] === [2021-11-07 01:26:20,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:26:20,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1578018257, now seen corresponding path program 1 times [2021-11-07 01:26:20,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:26:20,977 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [902578749] [2021-11-07 01:26:20,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:26:20,978 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:26:20,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:26:20,981 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:26:21,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:26:22,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:26:22,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 1134 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:26:22,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:26:22,770 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 01:26:22,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:26:23,069 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 01:26:23,069 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:26:23,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [902578749] [2021-11-07 01:26:23,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [902578749] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:26:23,070 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:26:23,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:26:23,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119106047] [2021-11-07 01:26:23,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:26:23,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:26:23,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:26:23,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:26:23,105 INFO L87 Difference]: Start difference. First operand has 5295 states, 5271 states have (on average 1.3200531208499335) internal successors, (6958), 5294 states have internal predecessors, (6958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 21.5) internal successors, (43), 2 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 01:26:23,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:26:23,324 INFO L93 Difference]: Finished difference Result 10496 states and 13791 transitions. [2021-11-07 01:26:23,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:26:23,325 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 21.5) internal successors, (43), 2 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 43 [2021-11-07 01:26:23,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:26:23,367 INFO L225 Difference]: With dead ends: 10496 [2021-11-07 01:26:23,368 INFO L226 Difference]: Without dead ends: 5101 [2021-11-07 01:26:23,382 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:26:23,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5101 states. [2021-11-07 01:26:23,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5101 to 5101. [2021-11-07 01:26:23,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5101 states, 5078 states have (on average 1.288499409216227) internal successors, (6543), 5100 states have internal predecessors, (6543), 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 01:26:23,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5101 states to 5101 states and 6543 transitions. [2021-11-07 01:26:23,645 INFO L78 Accepts]: Start accepts. Automaton has 5101 states and 6543 transitions. Word has length 43 [2021-11-07 01:26:23,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:26:23,646 INFO L470 AbstractCegarLoop]: Abstraction has 5101 states and 6543 transitions. [2021-11-07 01:26:23,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 21.5) internal successors, (43), 2 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 01:26:23,647 INFO L276 IsEmpty]: Start isEmpty. Operand 5101 states and 6543 transitions. [2021-11-07 01:26:23,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-07 01:26:23,649 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:26:23,649 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:26:23,689 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:26:23,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:26:23,874 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 20 more)] === [2021-11-07 01:26:23,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:26:23,875 INFO L85 PathProgramCache]: Analyzing trace with hash 716061479, now seen corresponding path program 1 times [2021-11-07 01:26:23,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:26:23,877 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [80232323] [2021-11-07 01:26:23,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:26:23,877 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:26:23,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:26:23,879 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:26:23,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:26:25,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:26:25,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 1134 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:26:25,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:26:25,614 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 01:26:25,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:26:25,889 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 01:26:25,889 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:26:25,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [80232323] [2021-11-07 01:26:25,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [80232323] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:26:25,889 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:26:25,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:26:25,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414917722] [2021-11-07 01:26:25,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:26:25,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:26:25,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:26:25,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:26:25,893 INFO L87 Difference]: Start difference. First operand 5101 states and 6543 transitions. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 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 01:26:26,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:26:26,176 INFO L93 Difference]: Finished difference Result 10186 states and 13073 transitions. [2021-11-07 01:26:26,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:26:26,178 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 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 43 [2021-11-07 01:26:26,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:26:26,206 INFO L225 Difference]: With dead ends: 10186 [2021-11-07 01:26:26,206 INFO L226 Difference]: Without dead ends: 5105 [2021-11-07 01:26:26,216 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 82 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 01:26:26,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5105 states. [2021-11-07 01:26:26,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5105 to 5105. [2021-11-07 01:26:26,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5105 states, 5082 states have (on average 1.288272333726879) internal successors, (6547), 5104 states have internal predecessors, (6547), 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 01:26:26,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5105 states to 5105 states and 6547 transitions. [2021-11-07 01:26:26,366 INFO L78 Accepts]: Start accepts. Automaton has 5105 states and 6547 transitions. Word has length 43 [2021-11-07 01:26:26,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:26:26,366 INFO L470 AbstractCegarLoop]: Abstraction has 5105 states and 6547 transitions. [2021-11-07 01:26:26,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 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 01:26:26,366 INFO L276 IsEmpty]: Start isEmpty. Operand 5105 states and 6547 transitions. [2021-11-07 01:26:26,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-07 01:26:26,369 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:26:26,369 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] [2021-11-07 01:26:26,409 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:26:26,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:26:26,586 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 20 more)] === [2021-11-07 01:26:26,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:26:26,587 INFO L85 PathProgramCache]: Analyzing trace with hash 575553383, now seen corresponding path program 1 times [2021-11-07 01:26:26,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:26:26,589 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [245678741] [2021-11-07 01:26:26,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:26:26,590 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:26:26,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:26:26,591 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:26:26,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:26:27,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:26:27,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 1154 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:26:27,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:26:28,460 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:26:28,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:26:29,075 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:26:29,076 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:26:29,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [245678741] [2021-11-07 01:26:29,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [245678741] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:26:29,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1089867324] [2021-11-07 01:26:29,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:26:29,077 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:26:29,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:26:29,093 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:26:29,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-11-07 01:26:30,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:26:30,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 1154 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:26:30,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:26:30,850 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:26:30,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:26:31,553 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:26:31,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1089867324] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:26:31,554 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:26:31,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5, 5] total 9 [2021-11-07 01:26:31,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197440718] [2021-11-07 01:26:31,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:26:31,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:26:31,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:26:31,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:26:31,556 INFO L87 Difference]: Start difference. First operand 5105 states and 6547 transitions. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 2 states have internal predecessors, (45), 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 01:26:34,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:26:34,059 INFO L93 Difference]: Finished difference Result 5105 states and 6547 transitions. [2021-11-07 01:26:34,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:26:34,059 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 2 states have internal predecessors, (45), 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 47 [2021-11-07 01:26:34,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:26:34,088 INFO L225 Difference]: With dead ends: 5105 [2021-11-07 01:26:34,088 INFO L226 Difference]: Without dead ends: 5083 [2021-11-07 01:26:34,091 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:26:34,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5083 states. [2021-11-07 01:26:34,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5083 to 5083. [2021-11-07 01:26:34,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5083 states, 5071 states have (on average 1.286728455925853) internal successors, (6525), 5082 states have internal predecessors, (6525), 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 01:26:34,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5083 states to 5083 states and 6525 transitions. [2021-11-07 01:26:34,250 INFO L78 Accepts]: Start accepts. Automaton has 5083 states and 6525 transitions. Word has length 47 [2021-11-07 01:26:34,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:26:34,251 INFO L470 AbstractCegarLoop]: Abstraction has 5083 states and 6525 transitions. [2021-11-07 01:26:34,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 2 states have internal predecessors, (45), 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 01:26:34,252 INFO L276 IsEmpty]: Start isEmpty. Operand 5083 states and 6525 transitions. [2021-11-07 01:26:34,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-07 01:26:34,255 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:26:34,255 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] [2021-11-07 01:26:34,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:26:34,493 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:26:34,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:26:34,678 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 20 more)] === [2021-11-07 01:26:34,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:26:34,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1572603939, now seen corresponding path program 1 times [2021-11-07 01:26:34,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:26:34,680 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1270336513] [2021-11-07 01:26:34,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:26:34,680 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:26:34,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:26:34,682 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:26:34,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:26:35,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:26:35,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 1199 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:26:35,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:26:36,581 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:26:36,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:26:37,279 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:26:37,280 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:26:37,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1270336513] [2021-11-07 01:26:37,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1270336513] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:26:37,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [458933126] [2021-11-07 01:26:37,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:26:37,281 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:26:37,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:26:37,283 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:26:37,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-07 01:26:38,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:26:38,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 1199 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:26:38,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:26:39,047 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:26:39,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:26:39,621 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:26:39,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [458933126] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:26:39,622 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:26:39,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 10 [2021-11-07 01:26:39,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672145723] [2021-11-07 01:26:39,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:26:39,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:26:39,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:26:39,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:26:39,624 INFO L87 Difference]: Start difference. First operand 5083 states and 6525 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 3 states have internal predecessors, (57), 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 01:26:41,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:26:41,001 INFO L93 Difference]: Finished difference Result 19327 states and 24667 transitions. [2021-11-07 01:26:41,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:26:41,002 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 3 states have internal predecessors, (57), 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 59 [2021-11-07 01:26:41,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:26:41,096 INFO L225 Difference]: With dead ends: 19327 [2021-11-07 01:26:41,097 INFO L226 Difference]: Without dead ends: 14274 [2021-11-07 01:26:41,242 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:26:41,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14274 states. [2021-11-07 01:26:41,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14274 to 7476. [2021-11-07 01:26:41,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7476 states, 7464 states have (on average 1.2754555198285102) internal successors, (9520), 7475 states have internal predecessors, (9520), 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 01:26:41,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7476 states to 7476 states and 9520 transitions. [2021-11-07 01:26:41,578 INFO L78 Accepts]: Start accepts. Automaton has 7476 states and 9520 transitions. Word has length 59 [2021-11-07 01:26:41,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:26:41,579 INFO L470 AbstractCegarLoop]: Abstraction has 7476 states and 9520 transitions. [2021-11-07 01:26:41,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 3 states have internal predecessors, (57), 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 01:26:41,579 INFO L276 IsEmpty]: Start isEmpty. Operand 7476 states and 9520 transitions. [2021-11-07 01:26:41,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 01:26:41,584 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:26:41,584 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] [2021-11-07 01:26:41,597 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:26:41,818 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-11-07 01:26:41,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:26:41,997 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 20 more)] === [2021-11-07 01:26:41,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:26:41,997 INFO L85 PathProgramCache]: Analyzing trace with hash 913232309, now seen corresponding path program 1 times [2021-11-07 01:26:41,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:26:41,999 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [609329256] [2021-11-07 01:26:41,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:26:41,999 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:26:41,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:26:42,000 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:26:42,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:26:43,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:26:43,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 1201 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:26:43,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:26:43,822 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:26:43,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:26:44,498 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:26:44,499 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:26:44,499 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [609329256] [2021-11-07 01:26:44,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [609329256] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:26:44,499 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [641140330] [2021-11-07 01:26:44,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:26:44,499 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:26:44,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:26:44,512 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:26:44,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-07 01:26:45,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:26:45,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 1201 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:26:45,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:26:46,399 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:26:46,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:26:46,987 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:26:46,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [641140330] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:26:46,987 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:26:46,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 10 [2021-11-07 01:26:46,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50908659] [2021-11-07 01:26:46,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:26:46,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:26:46,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:26:46,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:26:46,989 INFO L87 Difference]: Start difference. First operand 7476 states and 9520 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 3 states have internal predecessors, (58), 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 01:26:48,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:26:48,197 INFO L93 Difference]: Finished difference Result 31296 states and 39652 transitions. [2021-11-07 01:26:48,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:26:48,197 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 3 states have internal predecessors, (58), 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 60 [2021-11-07 01:26:48,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:26:48,250 INFO L225 Difference]: With dead ends: 31296 [2021-11-07 01:26:48,251 INFO L226 Difference]: Without dead ends: 23850 [2021-11-07 01:26:48,269 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:26:48,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23850 states. [2021-11-07 01:26:48,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23850 to 14238. [2021-11-07 01:26:48,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14238 states, 14226 states have (on average 1.2728103472515113) internal successors, (18107), 14237 states have internal predecessors, (18107), 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 01:26:48,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14238 states to 14238 states and 18107 transitions. [2021-11-07 01:26:48,952 INFO L78 Accepts]: Start accepts. Automaton has 14238 states and 18107 transitions. Word has length 60 [2021-11-07 01:26:48,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:26:48,953 INFO L470 AbstractCegarLoop]: Abstraction has 14238 states and 18107 transitions. [2021-11-07 01:26:48,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 3 states have internal predecessors, (58), 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 01:26:48,955 INFO L276 IsEmpty]: Start isEmpty. Operand 14238 states and 18107 transitions. [2021-11-07 01:26:48,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-07 01:26:48,961 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:26:48,961 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] [2021-11-07 01:26:48,999 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:26:49,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:26:49,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:26:49,374 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 20 more)] === [2021-11-07 01:26:49,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:26:49,375 INFO L85 PathProgramCache]: Analyzing trace with hash 664746864, now seen corresponding path program 1 times [2021-11-07 01:26:49,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:26:49,377 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1629135938] [2021-11-07 01:26:49,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:26:49,377 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:26:49,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:26:49,381 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:26:49,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:26:50,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:26:50,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 1203 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:26:50,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:26:51,360 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:26:51,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:26:52,081 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:26:52,081 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:26:52,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1629135938] [2021-11-07 01:26:52,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1629135938] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:26:52,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [483615800] [2021-11-07 01:26:52,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:26:52,082 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:26:52,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:26:52,090 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:26:52,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-07 01:26:53,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:26:53,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 1203 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:26:53,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:26:54,001 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:26:54,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:26:54,613 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:26:54,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [483615800] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:26:54,614 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:26:54,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 10 [2021-11-07 01:26:54,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489868342] [2021-11-07 01:26:54,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:26:54,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:26:54,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:26:54,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:26:54,615 INFO L87 Difference]: Start difference. First operand 14238 states and 18107 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 3 states have internal predecessors, (59), 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 01:26:56,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:26:56,594 INFO L93 Difference]: Finished difference Result 60518 states and 76550 transitions. [2021-11-07 01:26:56,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:26:56,596 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 3 states have internal predecessors, (59), 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 61 [2021-11-07 01:26:56,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:26:56,704 INFO L225 Difference]: With dead ends: 60518 [2021-11-07 01:26:56,704 INFO L226 Difference]: Without dead ends: 46310 [2021-11-07 01:26:56,727 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:26:56,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46310 states. [2021-11-07 01:26:57,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46310 to 27111. [2021-11-07 01:26:57,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27111 states, 27099 states have (on average 1.269899258275213) internal successors, (34413), 27110 states have internal predecessors, (34413), 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 01:26:57,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27111 states to 27111 states and 34413 transitions. [2021-11-07 01:26:57,987 INFO L78 Accepts]: Start accepts. Automaton has 27111 states and 34413 transitions. Word has length 61 [2021-11-07 01:26:57,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:26:57,987 INFO L470 AbstractCegarLoop]: Abstraction has 27111 states and 34413 transitions. [2021-11-07 01:26:57,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 3 states have internal predecessors, (59), 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 01:26:57,988 INFO L276 IsEmpty]: Start isEmpty. Operand 27111 states and 34413 transitions. [2021-11-07 01:26:57,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-07 01:26:57,992 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:26:57,993 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] [2021-11-07 01:26:58,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:26:58,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:26:58,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:26:58,406 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 20 more)] === [2021-11-07 01:26:58,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:26:58,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1551634856, now seen corresponding path program 1 times [2021-11-07 01:26:58,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:26:58,408 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1646408407] [2021-11-07 01:26:58,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:26:58,408 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:26:58,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:26:58,409 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:26:58,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:26:59,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:26:59,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 1205 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:26:59,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:27:00,389 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:27:00,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:27:01,063 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:27:01,063 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:27:01,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1646408407] [2021-11-07 01:27:01,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1646408407] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:27:01,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1786122887] [2021-11-07 01:27:01,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:27:01,063 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:27:01,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:27:01,064 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:27:01,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-07 01:27:02,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:27:02,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 1205 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:27:02,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:27:03,166 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:27:03,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:27:03,788 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:27:03,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1786122887] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:27:03,789 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:27:03,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 10 [2021-11-07 01:27:03,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219863513] [2021-11-07 01:27:03,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:27:03,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:27:03,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:27:03,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:27:03,791 INFO L87 Difference]: Start difference. First operand 27111 states and 34413 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 3 states have internal predecessors, (60), 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 01:27:07,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:27:07,262 INFO L93 Difference]: Finished difference Result 117005 states and 147714 transitions. [2021-11-07 01:27:07,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:27:07,262 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 3 states have internal predecessors, (60), 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 62 [2021-11-07 01:27:07,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:27:07,461 INFO L225 Difference]: With dead ends: 117005 [2021-11-07 01:27:07,461 INFO L226 Difference]: Without dead ends: 89924 [2021-11-07 01:27:07,528 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:27:07,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89924 states. [2021-11-07 01:27:09,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89924 to 51552. [2021-11-07 01:27:09,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51552 states, 51540 states have (on average 1.2666472642607682) internal successors, (65283), 51551 states have internal predecessors, (65283), 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 01:27:09,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51552 states to 51552 states and 65283 transitions. [2021-11-07 01:27:09,979 INFO L78 Accepts]: Start accepts. Automaton has 51552 states and 65283 transitions. Word has length 62 [2021-11-07 01:27:09,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:27:09,979 INFO L470 AbstractCegarLoop]: Abstraction has 51552 states and 65283 transitions. [2021-11-07 01:27:09,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 3 states have internal predecessors, (60), 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 01:27:09,980 INFO L276 IsEmpty]: Start isEmpty. Operand 51552 states and 65283 transitions. [2021-11-07 01:27:09,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 01:27:09,988 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:27:09,988 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 01:27:09,999 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:27:10,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:27:10,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:27:10,389 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 20 more)] === [2021-11-07 01:27:10,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:27:10,389 INFO L85 PathProgramCache]: Analyzing trace with hash 345331428, now seen corresponding path program 1 times [2021-11-07 01:27:10,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:27:10,391 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1289586732] [2021-11-07 01:27:10,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:27:10,391 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:27:10,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:27:10,392 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:27:10,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:27:11,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:27:11,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 1219 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:27:11,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:27:12,444 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:27:12,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:27:13,176 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:27:13,176 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:27:13,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1289586732] [2021-11-07 01:27:13,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1289586732] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:27:13,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [417503639] [2021-11-07 01:27:13,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:27:13,177 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:27:13,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:27:13,178 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:27:13,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-07 01:27:14,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:27:14,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 1219 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:27:14,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:27:15,421 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-07 01:27:15,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:27:16,077 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-07 01:27:16,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [417503639] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:27:16,078 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:27:16,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 11 [2021-11-07 01:27:16,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850282006] [2021-11-07 01:27:16,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:27:16,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:27:16,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:27:16,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:27:16,079 INFO L87 Difference]: Start difference. First operand 51552 states and 65283 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 4 states have internal predecessors, (60), 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 01:27:21,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:27:21,969 INFO L93 Difference]: Finished difference Result 168550 states and 212902 transitions. [2021-11-07 01:27:21,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:27:21,969 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 4 states have internal predecessors, (60), 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 67 [2021-11-07 01:27:21,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:27:22,424 INFO L225 Difference]: With dead ends: 168550 [2021-11-07 01:27:22,424 INFO L226 Difference]: Without dead ends: 117028 [2021-11-07 01:27:22,513 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 255 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:27:22,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117028 states. [2021-11-07 01:27:25,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117028 to 51592. [2021-11-07 01:27:25,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51592 states, 51580 states have (on average 1.2664404808065142) internal successors, (65323), 51591 states have internal predecessors, (65323), 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 01:27:25,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51592 states to 51592 states and 65323 transitions. [2021-11-07 01:27:25,857 INFO L78 Accepts]: Start accepts. Automaton has 51592 states and 65323 transitions. Word has length 67 [2021-11-07 01:27:25,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:27:25,858 INFO L470 AbstractCegarLoop]: Abstraction has 51592 states and 65323 transitions. [2021-11-07 01:27:25,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 4 states have internal predecessors, (60), 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 01:27:25,858 INFO L276 IsEmpty]: Start isEmpty. Operand 51592 states and 65323 transitions. [2021-11-07 01:27:25,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-07 01:27:25,863 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:27:25,863 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 01:27:25,894 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:27:26,104 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-11-07 01:27:26,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:27:26,278 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 20 more)] === [2021-11-07 01:27:26,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:27:26,278 INFO L85 PathProgramCache]: Analyzing trace with hash -512667075, now seen corresponding path program 1 times [2021-11-07 01:27:26,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:27:26,280 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1823016295] [2021-11-07 01:27:26,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:27:26,280 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:27:26,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:27:26,281 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:27:26,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:27:27,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:27:27,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 1329 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:27:27,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:27:28,611 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 01:27:28,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:27:29,473 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 01:27:29,474 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:27:29,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1823016295] [2021-11-07 01:27:29,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1823016295] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:27:29,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [135116197] [2021-11-07 01:27:29,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:27:29,474 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:27:29,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:27:29,475 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:27:29,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-07 01:27:30,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:27:31,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 1329 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:27:31,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:27:31,515 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:27:31,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:27:31,945 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:27:31,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [135116197] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:27:31,946 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:27:31,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-07 01:27:31,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052977534] [2021-11-07 01:27:31,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:27:31,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:27:31,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:27:31,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:27:31,948 INFO L87 Difference]: Start difference. First operand 51592 states and 65323 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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 01:27:36,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:27:36,507 INFO L93 Difference]: Finished difference Result 132226 states and 167450 transitions. [2021-11-07 01:27:36,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:27:36,508 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-11-07 01:27:36,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:27:36,623 INFO L225 Difference]: With dead ends: 132226 [2021-11-07 01:27:36,623 INFO L226 Difference]: Without dead ends: 80664 [2021-11-07 01:27:36,678 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:27:36,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80664 states. [2021-11-07 01:27:40,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80664 to 75872. [2021-11-07 01:27:40,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75872 states, 75860 states have (on average 1.2745979435802794) internal successors, (96691), 75871 states have internal predecessors, (96691), 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 01:27:40,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75872 states to 75872 states and 96691 transitions. [2021-11-07 01:27:40,511 INFO L78 Accepts]: Start accepts. Automaton has 75872 states and 96691 transitions. Word has length 84 [2021-11-07 01:27:40,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:27:40,512 INFO L470 AbstractCegarLoop]: Abstraction has 75872 states and 96691 transitions. [2021-11-07 01:27:40,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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 01:27:40,512 INFO L276 IsEmpty]: Start isEmpty. Operand 75872 states and 96691 transitions. [2021-11-07 01:27:40,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-11-07 01:27:40,554 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:27:40,555 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:27:40,628 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:27:40,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:27:40,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:27:40,970 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 20 more)] === [2021-11-07 01:27:40,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:27:40,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1313177807, now seen corresponding path program 1 times [2021-11-07 01:27:40,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:27:40,972 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1880447705] [2021-11-07 01:27:40,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:27:40,972 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:27:40,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:27:40,973 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:27:40,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:27:42,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:27:43,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 1760 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:27:43,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:27:44,298 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:27:44,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:27:45,708 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:27:45,708 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:27:45,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1880447705] [2021-11-07 01:27:45,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1880447705] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:27:45,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1809834179] [2021-11-07 01:27:45,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:27:45,709 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:27:45,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:27:45,709 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:27:45,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7fd4e42-cda1-47c5-afcd-de179e49b7c4/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-07 01:27:47,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:27:47,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 1760 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:27:47,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:27:48,789 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-07 01:27:48,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:27:49,789 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-07 01:27:49,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1809834179] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:27:49,790 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:27:49,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-07 01:27:49,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406261314] [2021-11-07 01:27:49,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:27:49,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:27:49,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:27:49,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:27:49,793 INFO L87 Difference]: Start difference. First operand 75872 states and 96691 transitions. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 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)