./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-08_1a-drivers--media--pci--pt3--earth-pt3.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_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/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_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--media--pci--pt3--earth-pt3.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/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_9a8c4a55-e251-4908-8c5e-91fa1df51b58/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 a80d5d6260f748dd9867d7bcd6f4a93a5987d3d416867522c1bef6a78e755228 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:48:22,117 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:48:22,119 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:48:22,168 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:48:22,169 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:48:22,176 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:48:22,178 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:48:22,185 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:48:22,188 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:48:22,197 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:48:22,198 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:48:22,201 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:48:22,201 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:48:22,205 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:48:22,208 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:48:22,215 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:48:22,218 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:48:22,219 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:48:22,226 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:48:22,234 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:48:22,236 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:48:22,239 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:48:22,243 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:48:22,244 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:48:22,250 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:48:22,251 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:48:22,251 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:48:22,254 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:48:22,254 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:48:22,256 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:48:22,257 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:48:22,258 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:48:22,261 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:48:22,262 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:48:22,264 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:48:22,264 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:48:22,266 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:48:22,266 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:48:22,266 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:48:22,267 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:48:22,268 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:48:22,269 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-07 01:48:22,325 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:48:22,326 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:48:22,327 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:48:22,327 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:48:22,329 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:48:22,329 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:48:22,329 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:48:22,330 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:48:22,330 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:48:22,330 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:48:22,331 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:48:22,332 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:48:22,332 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:48:22,332 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:48:22,332 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:48:22,334 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:48:22,334 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:48:22,334 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:48:22,335 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:48:22,335 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:48:22,335 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:48:22,335 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:48:22,336 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:48:22,336 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:48:22,336 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:48:22,337 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:48:22,337 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:48:22,337 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:48:22,338 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:48:22,339 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:48:22,339 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:48:22,340 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:48:22,340 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:48:22,340 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:48:22,341 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:48:22,341 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:48:22,341 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_9a8c4a55-e251-4908-8c5e-91fa1df51b58/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a80d5d6260f748dd9867d7bcd6f4a93a5987d3d416867522c1bef6a78e755228 [2021-11-07 01:48:22,649 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:48:22,691 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:48:22,695 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:48:22,708 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:48:22,709 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:48:22,710 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--media--pci--pt3--earth-pt3.ko-entry_point.cil.out.i [2021-11-07 01:48:22,815 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/data/576b43489/fa5585c6ed1c4df284e16a86e0f15ae5/FLAG7adee1fdb [2021-11-07 01:48:23,807 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:48:23,807 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--media--pci--pt3--earth-pt3.ko-entry_point.cil.out.i [2021-11-07 01:48:23,852 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/data/576b43489/fa5585c6ed1c4df284e16a86e0f15ae5/FLAG7adee1fdb [2021-11-07 01:48:24,289 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/data/576b43489/fa5585c6ed1c4df284e16a86e0f15ae5 [2021-11-07 01:48:24,292 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:48:24,295 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:48:24,299 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:48:24,299 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:48:24,304 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:48:24,305 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:48:24" (1/1) ... [2021-11-07 01:48:24,306 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@498a61d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:48:24, skipping insertion in model container [2021-11-07 01:48:24,307 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:48:24" (1/1) ... [2021-11-07 01:48:24,319 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:48:24,475 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:48:25,341 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 01:48:25,847 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 01:48:25,850 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 01:48:25,869 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 01:48:25,883 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 01:48:26,087 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 01:48:26,138 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 01:48:26,149 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 01:48:26,157 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 01:48:26,191 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 01:48:26,193 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 01:48:26,200 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 01:48:26,201 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 01:48:26,209 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 01:48:26,221 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 01:48:26,228 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 01:48:26,326 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 01:48:26,327 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 01:48:26,327 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 01:48:26,338 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 01:48:26,339 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 01:48:26,441 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 01:48:26,463 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 01:48:26,466 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 01:48:26,476 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 01:48:26,479 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 01:48:26,481 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 01:48:26,500 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_9a8c4a55-e251-4908-8c5e-91fa1df51b58/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--media--pci--pt3--earth-pt3.ko-entry_point.cil.out.i[191080,191093] [2021-11-07 01:48:26,566 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:48:26,628 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 01:48:26,629 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@56bf858c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:48:26, skipping insertion in model container [2021-11-07 01:48:26,629 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:48:26,629 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:48:26,631 INFO L168 Benchmark]: Toolchain (without parser) took 2334.87 ms. Allocated memory was 90.2 MB in the beginning and 119.5 MB in the end (delta: 29.4 MB). Free memory was 48.0 MB in the beginning and 66.3 MB in the end (delta: -18.3 MB). Peak memory consumption was 22.5 MB. Max. memory is 16.1 GB. [2021-11-07 01:48:26,632 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 90.2 MB. Free memory is still 72.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:48:26,633 INFO L168 Benchmark]: CACSL2BoogieTranslator took 2329.86 ms. Allocated memory was 90.2 MB in the beginning and 119.5 MB in the end (delta: 29.4 MB). Free memory was 47.7 MB in the beginning and 66.3 MB in the end (delta: -18.5 MB). Peak memory consumption was 20.4 MB. Max. memory is 16.1 GB. [2021-11-07 01:48:26,635 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 90.2 MB. Free memory is still 72.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 2329.86 ms. Allocated memory was 90.2 MB in the beginning and 119.5 MB in the end (delta: 29.4 MB). Free memory was 47.7 MB in the beginning and 66.3 MB in the end (delta: -18.5 MB). Peak memory consumption was 20.4 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 4428]: 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_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/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_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--media--pci--pt3--earth-pt3.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/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_9a8c4a55-e251-4908-8c5e-91fa1df51b58/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 a80d5d6260f748dd9867d7bcd6f4a93a5987d3d416867522c1bef6a78e755228 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:48:29,181 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:48:29,184 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:48:29,237 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:48:29,238 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:48:29,243 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:48:29,245 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:48:29,250 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:48:29,254 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:48:29,262 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:48:29,264 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:48:29,266 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:48:29,266 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:48:29,269 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:48:29,272 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:48:29,277 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:48:29,279 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:48:29,280 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:48:29,282 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:48:29,294 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:48:29,297 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:48:29,298 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:48:29,302 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:48:29,304 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:48:29,314 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:48:29,314 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:48:29,315 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:48:29,317 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:48:29,317 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:48:29,319 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:48:29,319 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:48:29,320 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:48:29,323 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:48:29,323 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:48:29,325 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:48:29,325 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:48:29,327 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:48:29,327 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:48:29,327 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:48:29,329 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:48:29,330 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:48:29,331 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-07 01:48:29,382 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:48:29,383 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:48:29,384 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:48:29,385 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:48:29,385 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:48:29,385 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:48:29,385 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:48:29,386 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:48:29,387 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:48:29,388 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:48:29,390 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:48:29,390 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:48:29,390 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:48:29,390 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:48:29,391 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:48:29,391 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:48:29,391 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:48:29,391 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:48:29,392 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:48:29,392 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:48:29,392 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:48:29,392 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:48:29,393 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:48:29,393 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:48:29,393 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:48:29,393 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:48:29,394 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:48:29,394 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:48:29,394 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:48:29,394 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:48:29,394 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:48:29,395 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:48:29,395 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_9a8c4a55-e251-4908-8c5e-91fa1df51b58/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a80d5d6260f748dd9867d7bcd6f4a93a5987d3d416867522c1bef6a78e755228 [2021-11-07 01:48:29,885 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:48:29,911 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:48:29,914 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:48:29,916 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:48:29,917 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:48:29,918 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--media--pci--pt3--earth-pt3.ko-entry_point.cil.out.i [2021-11-07 01:48:30,010 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/data/dbfd3b491/70086f7c8f644328bf2ee24eab82f057/FLAG1eb675f53 [2021-11-07 01:48:31,149 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:48:31,150 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--media--pci--pt3--earth-pt3.ko-entry_point.cil.out.i [2021-11-07 01:48:31,198 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/data/dbfd3b491/70086f7c8f644328bf2ee24eab82f057/FLAG1eb675f53 [2021-11-07 01:48:31,501 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/data/dbfd3b491/70086f7c8f644328bf2ee24eab82f057 [2021-11-07 01:48:31,504 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:48:31,505 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:48:31,507 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:48:31,507 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:48:31,526 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:48:31,527 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:48:31" (1/1) ... [2021-11-07 01:48:31,528 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@192c5264 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:48:31, skipping insertion in model container [2021-11-07 01:48:31,528 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:48:31" (1/1) ... [2021-11-07 01:48:31,537 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:48:31,702 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:48:33,836 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_9a8c4a55-e251-4908-8c5e-91fa1df51b58/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--media--pci--pt3--earth-pt3.ko-entry_point.cil.out.i[191080,191093] [2021-11-07 01:48:33,902 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:48:33,973 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:48:34,038 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:48:34,352 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_9a8c4a55-e251-4908-8c5e-91fa1df51b58/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--media--pci--pt3--earth-pt3.ko-entry_point.cil.out.i[191080,191093] [2021-11-07 01:48:34,369 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:48:34,411 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:48:34,894 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_9a8c4a55-e251-4908-8c5e-91fa1df51b58/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--media--pci--pt3--earth-pt3.ko-entry_point.cil.out.i[191080,191093] [2021-11-07 01:48:34,917 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:48:35,082 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:48:35,083 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:48:35 WrapperNode [2021-11-07 01:48:35,083 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:48:35,084 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:48:35,084 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:48:35,085 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:48:35,094 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:48:35" (1/1) ... [2021-11-07 01:48:35,210 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:48:35" (1/1) ... [2021-11-07 01:48:35,608 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:48:35,609 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:48:35,609 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:48:35,609 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:48:35,619 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:48:35" (1/1) ... [2021-11-07 01:48:35,620 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:48:35" (1/1) ... [2021-11-07 01:48:35,670 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:48:35" (1/1) ... [2021-11-07 01:48:35,671 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:48:35" (1/1) ... [2021-11-07 01:48:35,915 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:48:35" (1/1) ... [2021-11-07 01:48:35,952 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:48:35" (1/1) ... [2021-11-07 01:48:35,977 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:48:35" (1/1) ... [2021-11-07 01:48:36,020 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:48:36,021 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:48:36,022 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:48:36,022 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:48:36,023 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:48:35" (1/1) ... [2021-11-07 01:48:36,031 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:48:36,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:48:36,064 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:48:36,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:48:36,115 INFO L130 BoogieDeclarations]: Found specification of procedure pt3_fe_init [2021-11-07 01:48:36,115 INFO L138 BoogieDeclarations]: Found implementation of procedure pt3_fe_init [2021-11-07 01:48:36,115 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-07 01:48:36,115 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2021-11-07 01:48:36,116 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-07 01:48:36,116 INFO L130 BoogieDeclarations]: Found specification of procedure __xchg_wrong_size [2021-11-07 01:48:36,116 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-07 01:48:36,116 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-07 01:48:36,116 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-07 01:48:36,117 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-07 01:48:36,117 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:48:36,117 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 01:48:36,117 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-07 01:48:36,117 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-07 01:48:36,118 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-07 01:48:36,118 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-07 01:48:36,118 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 01:48:36,118 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-07 01:48:36,118 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2021-11-07 01:48:36,119 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:48:36,119 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-07 01:48:36,119 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-07 01:48:36,119 INFO L130 BoogieDeclarations]: Found specification of procedure pt3_resume [2021-11-07 01:48:36,119 INFO L138 BoogieDeclarations]: Found implementation of procedure pt3_resume [2021-11-07 01:48:36,119 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~C_INT [2021-11-07 01:48:36,120 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~C_INT [2021-11-07 01:48:36,120 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-07 01:48:36,120 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2021-11-07 01:48:36,120 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-07 01:48:36,120 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2021-11-07 01:48:36,121 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 01:48:36,121 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 01:48:36,121 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-07 01:48:36,121 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2021-11-07 01:48:36,121 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2021-11-07 01:48:36,122 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-07 01:48:36,122 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-07 01:48:36,122 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:48:36,122 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:49:32,797 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:49:32,797 INFO L299 CfgBuilder]: Removed 983 assume(true) statements. [2021-11-07 01:49:32,806 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:49:32 BoogieIcfgContainer [2021-11-07 01:49:32,807 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:49:32,810 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:49:32,812 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:49:32,815 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:49:32,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:48:31" (1/3) ... [2021-11-07 01:49:32,817 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@776badb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:49:32, skipping insertion in model container [2021-11-07 01:49:32,817 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:48:35" (2/3) ... [2021-11-07 01:49:32,818 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@776badb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:49:32, skipping insertion in model container [2021-11-07 01:49:32,818 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:49:32" (3/3) ... [2021-11-07 01:49:32,819 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-08_1a-drivers--media--pci--pt3--earth-pt3.ko-entry_point.cil.out.i [2021-11-07 01:49:32,826 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:49:32,827 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2021-11-07 01:49:32,913 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:49:32,929 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 01:49:32,930 INFO L340 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-11-07 01:49:32,977 INFO L276 IsEmpty]: Start isEmpty. Operand has 1317 states, 1292 states have (on average 1.4388544891640866) internal successors, (1859), 1299 states have internal predecessors, (1859), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-07 01:49:32,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:49:32,984 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:32,985 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] [2021-11-07 01:49:32,986 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:49:32,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:32,991 INFO L85 PathProgramCache]: Analyzing trace with hash -315506655, now seen corresponding path program 1 times [2021-11-07 01:49:33,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:33,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [797364080] [2021-11-07 01:49:33,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:33,011 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:33,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:33,014 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:33,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:49:34,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:34,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 1021 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:49:34,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:34,646 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 01:49:34,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:34,867 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 01:49:34,867 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:34,868 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [797364080] [2021-11-07 01:49:34,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [797364080] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:49:34,869 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:49:34,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:49:34,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391602878] [2021-11-07 01:49:34,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:49:34,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:34,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:49:34,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:49:34,898 INFO L87 Difference]: Start difference. First operand has 1317 states, 1292 states have (on average 1.4388544891640866) internal successors, (1859), 1299 states have internal predecessors, (1859), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 2 states, 2 states have (on average 12.0) internal successors, (24), 2 states have internal predecessors, (24), 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 01:49:35,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:35,058 INFO L93 Difference]: Finished difference Result 2630 states and 3783 transitions. [2021-11-07 01:49:35,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:49:35,060 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 12.0) internal successors, (24), 2 states have internal predecessors, (24), 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 24 [2021-11-07 01:49:35,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:35,095 INFO L225 Difference]: With dead ends: 2630 [2021-11-07 01:49:35,096 INFO L226 Difference]: Without dead ends: 1308 [2021-11-07 01:49:35,109 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 46 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 01:49:35,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1308 states. [2021-11-07 01:49:35,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1308 to 1308. [2021-11-07 01:49:35,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1308 states, 1284 states have (on average 1.408878504672897) internal successors, (1809), 1290 states have internal predecessors, (1809), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-07 01:49:35,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1308 states to 1308 states and 1837 transitions. [2021-11-07 01:49:35,257 INFO L78 Accepts]: Start accepts. Automaton has 1308 states and 1837 transitions. Word has length 24 [2021-11-07 01:49:35,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:49:35,258 INFO L470 AbstractCegarLoop]: Abstraction has 1308 states and 1837 transitions. [2021-11-07 01:49:35,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 12.0) internal successors, (24), 2 states have internal predecessors, (24), 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 01:49:35,258 INFO L276 IsEmpty]: Start isEmpty. Operand 1308 states and 1837 transitions. [2021-11-07 01:49:35,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:49:35,260 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:35,261 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] [2021-11-07 01:49:35,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:49:35,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:49:35,475 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:49:35,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:35,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1903854557, now seen corresponding path program 1 times [2021-11-07 01:49:35,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:35,480 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [280538423] [2021-11-07 01:49:35,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:35,480 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:35,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:35,483 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:35,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:49:36,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:36,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 1021 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:49:36,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:37,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:37,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:37,384 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 01:49:37,384 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:37,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [280538423] [2021-11-07 01:49:37,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [280538423] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:49:37,385 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:49:37,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:49:37,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725348851] [2021-11-07 01:49:37,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:49:37,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:37,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:49:37,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:49:37,389 INFO L87 Difference]: Start difference. First operand 1308 states and 1837 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 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 01:49:37,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:37,558 INFO L93 Difference]: Finished difference Result 2606 states and 3665 transitions. [2021-11-07 01:49:37,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:49:37,559 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 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 24 [2021-11-07 01:49:37,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:37,571 INFO L225 Difference]: With dead ends: 2606 [2021-11-07 01:49:37,571 INFO L226 Difference]: Without dead ends: 1310 [2021-11-07 01:49:37,579 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:49:37,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1310 states. [2021-11-07 01:49:37,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1310 to 1310. [2021-11-07 01:49:37,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1310 states, 1286 states have (on average 1.4082426127527217) internal successors, (1811), 1292 states have internal predecessors, (1811), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-07 01:49:37,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1310 states to 1310 states and 1839 transitions. [2021-11-07 01:49:37,634 INFO L78 Accepts]: Start accepts. Automaton has 1310 states and 1839 transitions. Word has length 24 [2021-11-07 01:49:37,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:49:37,635 INFO L470 AbstractCegarLoop]: Abstraction has 1310 states and 1839 transitions. [2021-11-07 01:49:37,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 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 01:49:37,635 INFO L276 IsEmpty]: Start isEmpty. Operand 1310 states and 1839 transitions. [2021-11-07 01:49:37,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-07 01:49:37,637 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:37,637 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:49:37,685 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-07 01:49:37,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:49:37,867 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:49:37,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:37,868 INFO L85 PathProgramCache]: Analyzing trace with hash 2131483043, now seen corresponding path program 1 times [2021-11-07 01:49:37,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:37,870 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [561930216] [2021-11-07 01:49:37,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:37,871 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:37,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:37,887 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:37,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:49:39,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:39,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 1031 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:49:39,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:39,788 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:39,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:40,577 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:40,578 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:40,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [561930216] [2021-11-07 01:49:40,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [561930216] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:49:40,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1317450287] [2021-11-07 01:49:40,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:40,579 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:49:40,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:49:40,585 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:49:40,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-11-07 01:49:41,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:41,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 1031 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:49:41,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:42,279 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:49:42,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:42,730 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:49:42,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1317450287] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:49:42,731 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:49:42,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5, 5] total 9 [2021-11-07 01:49:42,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253077023] [2021-11-07 01:49:42,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:49:42,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:42,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:49:42,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:49:42,733 INFO L87 Difference]: Start difference. First operand 1310 states and 1839 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 2 states have internal predecessors, (25), 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 01:49:43,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:43,150 INFO L93 Difference]: Finished difference Result 3890 states and 5476 transitions. [2021-11-07 01:49:43,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:49:43,154 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 2 states have internal predecessors, (25), 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 26 [2021-11-07 01:49:43,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:43,183 INFO L225 Difference]: With dead ends: 3890 [2021-11-07 01:49:43,183 INFO L226 Difference]: Without dead ends: 2593 [2021-11-07 01:49:43,191 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:49:43,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2593 states. [2021-11-07 01:49:43,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2593 to 2581. [2021-11-07 01:49:43,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2581 states, 2540 states have (on average 1.4098425196850393) internal successors, (3581), 2546 states have internal predecessors, (3581), 28 states have call successors, (28), 6 states have call predecessors, (28), 6 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2021-11-07 01:49:43,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2581 states to 2581 states and 3637 transitions. [2021-11-07 01:49:43,298 INFO L78 Accepts]: Start accepts. Automaton has 2581 states and 3637 transitions. Word has length 26 [2021-11-07 01:49:43,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:49:43,300 INFO L470 AbstractCegarLoop]: Abstraction has 2581 states and 3637 transitions. [2021-11-07 01:49:43,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 2 states have internal predecessors, (25), 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 01:49:43,300 INFO L276 IsEmpty]: Start isEmpty. Operand 2581 states and 3637 transitions. [2021-11-07 01:49:43,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-07 01:49:43,312 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:43,312 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:49:43,338 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:49:43,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:49:43,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:49:43,728 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:49:43,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:43,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1967477601, now seen corresponding path program 1 times [2021-11-07 01:49:43,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:43,731 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [289333516] [2021-11-07 01:49:43,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:43,731 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:43,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:43,732 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:43,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:49:44,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:45,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 1130 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:49:45,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:45,756 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:45,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:46,660 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:46,660 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:46,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [289333516] [2021-11-07 01:49:46,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [289333516] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:49:46,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1324359185] [2021-11-07 01:49:46,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:46,661 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:49:46,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:49:46,665 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:49:46,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-07 01:49:47,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:47,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 1130 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:49:47,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:48,152 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:49:48,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:48,472 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:49:48,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1324359185] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:49:48,473 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:49:48,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-07 01:49:48,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583143] [2021-11-07 01:49:48,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:49:48,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:48,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:49:48,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:49:48,475 INFO L87 Difference]: Start difference. First operand 2581 states and 3637 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-07 01:49:48,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:48,999 INFO L93 Difference]: Finished difference Result 6914 states and 9847 transitions. [2021-11-07 01:49:48,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:49:48,999 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 48 [2021-11-07 01:49:49,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:49,046 INFO L225 Difference]: With dead ends: 6914 [2021-11-07 01:49:49,046 INFO L226 Difference]: Without dead ends: 4349 [2021-11-07 01:49:49,061 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:49:49,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4349 states. [2021-11-07 01:49:49,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4349 to 4343. [2021-11-07 01:49:49,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4343 states, 4274 states have (on average 1.4319138979878334) internal successors, (6120), 4280 states have internal predecessors, (6120), 50 states have call successors, (50), 12 states have call predecessors, (50), 12 states have return successors, (50), 50 states have call predecessors, (50), 50 states have call successors, (50) [2021-11-07 01:49:49,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4343 states to 4343 states and 6220 transitions. [2021-11-07 01:49:49,266 INFO L78 Accepts]: Start accepts. Automaton has 4343 states and 6220 transitions. Word has length 48 [2021-11-07 01:49:49,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:49:49,267 INFO L470 AbstractCegarLoop]: Abstraction has 4343 states and 6220 transitions. [2021-11-07 01:49:49,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-07 01:49:49,267 INFO L276 IsEmpty]: Start isEmpty. Operand 4343 states and 6220 transitions. [2021-11-07 01:49:49,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 01:49:49,273 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:49,274 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:49:49,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:49:49,510 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:49:49,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:49:49,695 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:49:49,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:49,695 INFO L85 PathProgramCache]: Analyzing trace with hash 545781390, now seen corresponding path program 1 times [2021-11-07 01:49:49,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:49,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1359304490] [2021-11-07 01:49:49,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:49,698 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:49,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:49,700 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:49,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:49:51,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:51,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 1202 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:49:51,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:52,123 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:49:52,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:53,129 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:49:53,130 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:53,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1359304490] [2021-11-07 01:49:53,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1359304490] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:49:53,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [533651639] [2021-11-07 01:49:53,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:53,131 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:49:53,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:49:53,132 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:49:53,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-07 01:49:54,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:54,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 1202 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:49:54,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:54,730 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:49:54,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:55,047 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:49:55,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [533651639] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:49:55,048 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:49:55,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-07 01:49:55,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357236101] [2021-11-07 01:49:55,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:49:55,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:55,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:49:55,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:49:55,050 INFO L87 Difference]: Start difference. First operand 4343 states and 6220 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-07 01:49:57,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:57,436 INFO L93 Difference]: Finished difference Result 8675 states and 12428 transitions. [2021-11-07 01:49:57,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:49:57,437 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 65 [2021-11-07 01:49:57,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:57,471 INFO L225 Difference]: With dead ends: 8675 [2021-11-07 01:49:57,472 INFO L226 Difference]: Without dead ends: 4347 [2021-11-07 01:49:57,497 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 249 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:49:57,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4347 states. [2021-11-07 01:49:57,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4347 to 4344. [2021-11-07 01:49:57,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4344 states, 4275 states have (on average 1.431578947368421) internal successors, (6120), 4281 states have internal predecessors, (6120), 50 states have call successors, (50), 12 states have call predecessors, (50), 12 states have return successors, (50), 50 states have call predecessors, (50), 50 states have call successors, (50) [2021-11-07 01:49:57,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4344 states to 4344 states and 6220 transitions. [2021-11-07 01:49:57,697 INFO L78 Accepts]: Start accepts. Automaton has 4344 states and 6220 transitions. Word has length 65 [2021-11-07 01:49:57,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:49:57,699 INFO L470 AbstractCegarLoop]: Abstraction has 4344 states and 6220 transitions. [2021-11-07 01:49:57,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-07 01:49:57,700 INFO L276 IsEmpty]: Start isEmpty. Operand 4344 states and 6220 transitions. [2021-11-07 01:49:57,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 01:49:57,707 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:57,707 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:49:57,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:49:57,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:49:58,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:49:58,124 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:49:58,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:58,125 INFO L85 PathProgramCache]: Analyzing trace with hash 1876936518, now seen corresponding path program 1 times [2021-11-07 01:49:58,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:58,127 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1378283009] [2021-11-07 01:49:58,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:58,127 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:58,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:58,129 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:58,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:49:59,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:59,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 1259 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:49:59,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:50:00,738 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:50:00,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:50:01,880 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:50:01,881 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:50:01,881 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1378283009] [2021-11-07 01:50:01,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1378283009] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:50:01,881 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [369449059] [2021-11-07 01:50:01,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:50:01,881 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:50:01,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:50:01,885 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:50:01,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-07 01:50:03,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:50:03,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 1259 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:50:03,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:50:03,917 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:50:03,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:50:04,704 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:50:04,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [369449059] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:50:04,705 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:50:04,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 10 [2021-11-07 01:50:04,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025813527] [2021-11-07 01:50:04,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:50:04,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:50:04,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:50:04,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:50:04,707 INFO L87 Difference]: Start difference. First operand 4344 states and 6220 transitions. Second operand has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-07 01:50:07,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:50:07,825 INFO L93 Difference]: Finished difference Result 12237 states and 17657 transitions. [2021-11-07 01:50:07,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:50:07,826 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 74 [2021-11-07 01:50:07,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:50:07,896 INFO L225 Difference]: With dead ends: 12237 [2021-11-07 01:50:07,896 INFO L226 Difference]: Without dead ends: 7909 [2021-11-07 01:50:07,923 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:50:07,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7909 states. [2021-11-07 01:50:08,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7909 to 7900. [2021-11-07 01:50:08,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7900 states, 7775 states have (on average 1.4464308681672027) internal successors, (11246), 7781 states have internal predecessors, (11246), 94 states have call successors, (94), 24 states have call predecessors, (94), 24 states have return successors, (94), 94 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-07 01:50:08,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7900 states to 7900 states and 11434 transitions. [2021-11-07 01:50:08,319 INFO L78 Accepts]: Start accepts. Automaton has 7900 states and 11434 transitions. Word has length 74 [2021-11-07 01:50:08,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:50:08,320 INFO L470 AbstractCegarLoop]: Abstraction has 7900 states and 11434 transitions. [2021-11-07 01:50:08,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-07 01:50:08,321 INFO L276 IsEmpty]: Start isEmpty. Operand 7900 states and 11434 transitions. [2021-11-07 01:50:08,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-07 01:50:08,331 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:50:08,331 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] [2021-11-07 01:50:08,368 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:50:08,566 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:50:08,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:50:08,749 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:50:08,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:50:08,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1076097525, now seen corresponding path program 1 times [2021-11-07 01:50:08,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:50:08,752 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [664128345] [2021-11-07 01:50:08,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:50:08,752 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:50:08,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:50:08,754 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:50:08,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:50:10,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:50:10,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 1322 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:50:10,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:50:11,287 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-07 01:50:11,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:50:12,538 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-07 01:50:12,539 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:50:12,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [664128345] [2021-11-07 01:50:12,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [664128345] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:50:12,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1270838722] [2021-11-07 01:50:12,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:50:12,539 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:50:12,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:50:12,540 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:50:12,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-07 01:50:13,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:50:13,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 1322 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:50:13,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:50:14,624 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 01:50:14,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:50:15,247 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 01:50:15,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1270838722] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:50:15,250 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:50:15,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 12 [2021-11-07 01:50:15,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952804763] [2021-11-07 01:50:15,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:50:15,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:50:15,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:50:15,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:50:15,252 INFO L87 Difference]: Start difference. First operand 7900 states and 11434 transitions. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-07 01:50:19,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:50:19,067 INFO L93 Difference]: Finished difference Result 20652 states and 29737 transitions. [2021-11-07 01:50:19,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:50:19,068 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 85 [2021-11-07 01:50:19,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:50:19,197 INFO L225 Difference]: With dead ends: 20652 [2021-11-07 01:50:19,198 INFO L226 Difference]: Without dead ends: 12768 [2021-11-07 01:50:19,249 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:50:19,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12768 states. [2021-11-07 01:50:19,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12768 to 7904. [2021-11-07 01:50:19,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7904 states, 7779 states have (on average 1.4462013112225223) internal successors, (11250), 7785 states have internal predecessors, (11250), 94 states have call successors, (94), 24 states have call predecessors, (94), 24 states have return successors, (94), 94 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-07 01:50:19,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7904 states to 7904 states and 11438 transitions. [2021-11-07 01:50:19,860 INFO L78 Accepts]: Start accepts. Automaton has 7904 states and 11438 transitions. Word has length 85 [2021-11-07 01:50:19,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:50:19,860 INFO L470 AbstractCegarLoop]: Abstraction has 7904 states and 11438 transitions. [2021-11-07 01:50:19,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-07 01:50:19,861 INFO L276 IsEmpty]: Start isEmpty. Operand 7904 states and 11438 transitions. [2021-11-07 01:50:19,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-07 01:50:19,875 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:50:19,876 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] [2021-11-07 01:50:19,929 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:50:20,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:50:20,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:50:20,295 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:50:20,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:50:20,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1799287485, now seen corresponding path program 1 times [2021-11-07 01:50:20,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:50:20,298 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [675198918] [2021-11-07 01:50:20,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:50:20,299 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:50:20,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:50:20,301 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:50:20,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:50:22,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:50:22,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 1346 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:50:22,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:50:23,205 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-07 01:50:23,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:50:24,562 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-07 01:50:24,562 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:50:24,562 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [675198918] [2021-11-07 01:50:24,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [675198918] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:50:24,562 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2027974791] [2021-11-07 01:50:24,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:50:24,563 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:50:24,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:50:24,564 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:50:24,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-07 01:50:26,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:50:26,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 1346 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:50:26,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:50:26,771 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 01:50:26,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:50:27,217 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 01:50:27,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2027974791] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:50:27,217 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:50:27,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-07 01:50:27,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106175574] [2021-11-07 01:50:27,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:50:27,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:50:27,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:50:27,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:50:27,219 INFO L87 Difference]: Start difference. First operand 7904 states and 11438 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-07 01:50:27,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:50:27,634 INFO L93 Difference]: Finished difference Result 15794 states and 22863 transitions. [2021-11-07 01:50:27,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:50:27,635 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 92 [2021-11-07 01:50:27,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:50:27,677 INFO L225 Difference]: With dead ends: 15794 [2021-11-07 01:50:27,678 INFO L226 Difference]: Without dead ends: 7906 [2021-11-07 01:50:27,708 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 357 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:50:27,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7906 states. [2021-11-07 01:50:28,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7906 to 7906. [2021-11-07 01:50:28,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7906 states, 7781 states have (on average 1.446086621256908) internal successors, (11252), 7787 states have internal predecessors, (11252), 94 states have call successors, (94), 24 states have call predecessors, (94), 24 states have return successors, (94), 94 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-07 01:50:28,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7906 states to 7906 states and 11440 transitions. [2021-11-07 01:50:28,195 INFO L78 Accepts]: Start accepts. Automaton has 7906 states and 11440 transitions. Word has length 92 [2021-11-07 01:50:28,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:50:28,195 INFO L470 AbstractCegarLoop]: Abstraction has 7906 states and 11440 transitions. [2021-11-07 01:50:28,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-07 01:50:28,196 INFO L276 IsEmpty]: Start isEmpty. Operand 7906 states and 11440 transitions. [2021-11-07 01:50:28,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-07 01:50:28,216 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:50:28,216 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] [2021-11-07 01:50:28,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:50:28,448 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:50:28,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:50:28,631 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:50:28,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:50:28,631 INFO L85 PathProgramCache]: Analyzing trace with hash 901894207, now seen corresponding path program 1 times [2021-11-07 01:50:28,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:50:28,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1279768625] [2021-11-07 01:50:28,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:50:28,633 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:50:28,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:50:28,634 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:50:28,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:50:30,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:50:30,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 1348 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:50:30,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:50:31,363 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-07 01:50:31,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:50:32,612 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-07 01:50:32,613 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:50:32,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1279768625] [2021-11-07 01:50:32,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1279768625] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:50:32,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1999973057] [2021-11-07 01:50:32,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:50:32,613 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:50:32,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:50:32,614 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:50:32,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-07 01:50:35,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:50:35,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 1348 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:50:35,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:50:36,610 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-07 01:50:36,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:50:37,390 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-07 01:50:37,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1999973057] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:50:37,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366819910] [2021-11-07 01:50:37,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:50:37,391 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:50:37,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:50:37,392 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:50:37,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-07 01:50:38,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:50:39,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 1348 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:50:39,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:50:39,983 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 01:50:39,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:50:40,833 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 01:50:40,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366819910] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:50:40,833 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-11-07 01:50:40,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5, 5, 5] total 14 [2021-11-07 01:50:40,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540429877] [2021-11-07 01:50:40,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:50:40,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:50:40,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:50:40,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:50:40,835 INFO L87 Difference]: Start difference. First operand 7906 states and 11440 transitions. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-07 01:50:51,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:50:51,818 INFO L93 Difference]: Finished difference Result 22692 states and 32651 transitions. [2021-11-07 01:50:51,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-07 01:50:51,819 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 92 [2021-11-07 01:50:51,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:50:51,887 INFO L225 Difference]: With dead ends: 22692 [2021-11-07 01:50:51,887 INFO L226 Difference]: Without dead ends: 14802 [2021-11-07 01:50:51,920 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 561 GetRequests, 537 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=133, Invalid=517, Unknown=0, NotChecked=0, Total=650 [2021-11-07 01:50:51,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14802 states. [2021-11-07 01:50:52,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14802 to 8038. [2021-11-07 01:50:52,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8038 states, 7911 states have (on average 1.4440652256351916) internal successors, (11424), 7917 states have internal predecessors, (11424), 96 states have call successors, (96), 24 states have call predecessors, (96), 24 states have return successors, (96), 96 states have call predecessors, (96), 96 states have call successors, (96) [2021-11-07 01:50:52,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8038 states to 8038 states and 11616 transitions. [2021-11-07 01:50:52,444 INFO L78 Accepts]: Start accepts. Automaton has 8038 states and 11616 transitions. Word has length 92 [2021-11-07 01:50:52,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:50:52,445 INFO L470 AbstractCegarLoop]: Abstraction has 8038 states and 11616 transitions. [2021-11-07 01:50:52,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-07 01:50:52,445 INFO L276 IsEmpty]: Start isEmpty. Operand 8038 states and 11616 transitions. [2021-11-07 01:50:52,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-07 01:50:52,459 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:50:52,459 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:50:52,500 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:50:52,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:50:52,925 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-11-07 01:50:53,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:50:53,077 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:50:53,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:50:53,078 INFO L85 PathProgramCache]: Analyzing trace with hash -647490130, now seen corresponding path program 1 times [2021-11-07 01:50:53,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:50:53,080 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [237382047] [2021-11-07 01:50:53,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:50:53,080 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:50:53,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:50:53,081 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:50:53,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 01:50:54,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:50:55,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 1622 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:50:55,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:50:56,705 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:50:56,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:50:58,502 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:50:58,502 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:50:58,502 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [237382047] [2021-11-07 01:50:58,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [237382047] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:50:58,502 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2085488237] [2021-11-07 01:50:58,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:50:58,503 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:50:58,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:50:58,504 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:50:58,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-07 01:51:00,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:51:00,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 1622 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:51:00,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:51:01,136 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 01:51:01,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:51:01,675 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 01:51:01,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2085488237] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:51:01,676 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:51:01,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-07 01:51:01,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267787699] [2021-11-07 01:51:01,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:51:01,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:51:01,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:51:01,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:51:01,678 INFO L87 Difference]: Start difference. First operand 8038 states and 11616 transitions. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-07 01:51:02,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:51:02,032 INFO L93 Difference]: Finished difference Result 16062 states and 23219 transitions. [2021-11-07 01:51:02,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:51:02,034 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 137 [2021-11-07 01:51:02,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:51:02,066 INFO L225 Difference]: With dead ends: 16062 [2021-11-07 01:51:02,067 INFO L226 Difference]: Without dead ends: 8040 [2021-11-07 01:51:02,091 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 544 GetRequests, 537 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:51:02,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8040 states. [2021-11-07 01:51:02,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8040 to 8040. [2021-11-07 01:51:02,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8040 states, 7913 states have (on average 1.4439529887526854) internal successors, (11426), 7919 states have internal predecessors, (11426), 96 states have call successors, (96), 24 states have call predecessors, (96), 24 states have return successors, (96), 96 states have call predecessors, (96), 96 states have call successors, (96) [2021-11-07 01:51:02,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8040 states to 8040 states and 11618 transitions. [2021-11-07 01:51:02,436 INFO L78 Accepts]: Start accepts. Automaton has 8040 states and 11618 transitions. Word has length 137 [2021-11-07 01:51:02,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:51:02,437 INFO L470 AbstractCegarLoop]: Abstraction has 8040 states and 11618 transitions. [2021-11-07 01:51:02,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-07 01:51:02,437 INFO L276 IsEmpty]: Start isEmpty. Operand 8040 states and 11618 transitions. [2021-11-07 01:51:02,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-07 01:51:02,453 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:51:02,453 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:51:02,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-11-07 01:51:02,704 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-07 01:51:02,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:51:02,868 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:51:02,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:51:02,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1314084528, now seen corresponding path program 1 times [2021-11-07 01:51:02,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:51:02,870 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1040396586] [2021-11-07 01:51:02,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:51:02,870 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:51:02,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:51:02,871 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:51:02,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-07 01:51:04,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:51:05,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 1625 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:51:05,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:51:06,719 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:51:06,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:51:08,458 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:51:08,458 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:51:08,458 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1040396586] [2021-11-07 01:51:08,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1040396586] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:51:08,458 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [74511691] [2021-11-07 01:51:08,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:51:08,459 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:51:08,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:51:08,460 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:51:08,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-11-07 01:51:10,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:51:10,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 1625 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:51:10,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:51:11,188 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 01:51:11,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:51:11,570 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 01:51:11,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [74511691] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:51:11,570 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:51:11,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-07 01:51:11,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285931780] [2021-11-07 01:51:11,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:51:11,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:51:11,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:51:11,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:51:11,572 INFO L87 Difference]: Start difference. First operand 8040 states and 11618 transitions. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-07 01:51:14,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:51:14,117 INFO L93 Difference]: Finished difference Result 17074 states and 24738 transitions. [2021-11-07 01:51:14,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:51:14,120 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 137 [2021-11-07 01:51:14,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:51:14,167 INFO L225 Difference]: With dead ends: 17074 [2021-11-07 01:51:14,167 INFO L226 Difference]: Without dead ends: 9050 [2021-11-07 01:51:14,206 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 544 GetRequests, 537 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:51:14,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9050 states. [2021-11-07 01:51:14,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9050 to 7910. [2021-11-07 01:51:14,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7910 states, 7785 states have (on average 1.4458574181117534) internal successors, (11256), 7791 states have internal predecessors, (11256), 94 states have call successors, (94), 24 states have call predecessors, (94), 24 states have return successors, (94), 94 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-07 01:51:14,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7910 states to 7910 states and 11444 transitions. [2021-11-07 01:51:14,653 INFO L78 Accepts]: Start accepts. Automaton has 7910 states and 11444 transitions. Word has length 137 [2021-11-07 01:51:14,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:51:14,654 INFO L470 AbstractCegarLoop]: Abstraction has 7910 states and 11444 transitions. [2021-11-07 01:51:14,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-07 01:51:14,654 INFO L276 IsEmpty]: Start isEmpty. Operand 7910 states and 11444 transitions. [2021-11-07 01:51:14,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-07 01:51:14,671 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:51:14,672 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:51:14,689 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2021-11-07 01:51:14,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-07 01:51:15,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:51:15,089 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:51:15,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:51:15,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1114770998, now seen corresponding path program 1 times [2021-11-07 01:51:15,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:51:15,092 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1708064662] [2021-11-07 01:51:15,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:51:15,092 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:51:15,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:51:15,093 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:51:15,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-07 01:51:17,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:51:17,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 1666 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:51:17,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:51:19,599 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:51:19,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:51:21,660 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:51:21,660 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:51:21,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1708064662] [2021-11-07 01:51:21,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1708064662] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:51:21,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1114623138] [2021-11-07 01:51:21,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:51:21,661 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:51:21,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:51:21,662 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:51:21,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-07 01:51:23,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:51:23,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 1666 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 01:51:23,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:51:26,072 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 01:51:26,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:51:28,118 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 01:51:28,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1114623138] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:51:28,118 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:51:28,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [5, 5] total 18 [2021-11-07 01:51:28,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536400079] [2021-11-07 01:51:28,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:51:28,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:51:28,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:51:28,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-11-07 01:51:28,120 INFO L87 Difference]: Start difference. First operand 7910 states and 11444 transitions. Second operand has 12 states, 12 states have (on average 13.916666666666666) internal successors, (167), 12 states have internal predecessors, (167), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-07 01:51:41,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:51:41,142 INFO L93 Difference]: Finished difference Result 31348 states and 45739 transitions. [2021-11-07 01:51:41,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 01:51:41,143 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 13.916666666666666) internal successors, (167), 12 states have internal predecessors, (167), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 146 [2021-11-07 01:51:41,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:51:41,196 INFO L225 Difference]: With dead ends: 31348 [2021-11-07 01:51:41,196 INFO L226 Difference]: Without dead ends: 23454 [2021-11-07 01:51:41,221 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 589 GetRequests, 568 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2021-11-07 01:51:41,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23454 states. [2021-11-07 01:51:41,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23454 to 7920. [2021-11-07 01:51:41,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7920 states, 7795 states have (on average 1.4452854393842207) internal successors, (11266), 7801 states have internal predecessors, (11266), 94 states have call successors, (94), 24 states have call predecessors, (94), 24 states have return successors, (94), 94 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-07 01:51:41,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7920 states to 7920 states and 11454 transitions. [2021-11-07 01:51:41,967 INFO L78 Accepts]: Start accepts. Automaton has 7920 states and 11454 transitions. Word has length 146 [2021-11-07 01:51:41,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:51:41,968 INFO L470 AbstractCegarLoop]: Abstraction has 7920 states and 11454 transitions. [2021-11-07 01:51:41,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 13.916666666666666) internal successors, (167), 12 states have internal predecessors, (167), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-07 01:51:41,968 INFO L276 IsEmpty]: Start isEmpty. Operand 7920 states and 11454 transitions. [2021-11-07 01:51:41,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-07 01:51:41,981 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:51:41,981 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:51:42,025 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-07 01:51:42,205 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-11-07 01:51:42,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:51:42,395 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:51:42,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:51:42,395 INFO L85 PathProgramCache]: Analyzing trace with hash -837956478, now seen corresponding path program 1 times [2021-11-07 01:51:42,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:51:42,397 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2093541370] [2021-11-07 01:51:42,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:51:42,397 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:51:42,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:51:42,398 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:51:42,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-07 01:51:44,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:51:44,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 1692 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:51:44,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:51:46,446 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:51:46,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:51:48,330 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:51:48,330 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:51:48,330 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2093541370] [2021-11-07 01:51:48,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2093541370] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:51:48,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [831741133] [2021-11-07 01:51:48,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:51:48,331 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:51:48,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:51:48,338 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:51:48,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-07 01:51:52,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:51:52,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 1692 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:51:52,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:51:53,650 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:51:53,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:51:54,968 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:51:54,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [831741133] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:51:54,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843967249] [2021-11-07 01:51:54,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:51:54,969 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:51:54,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:51:54,970 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:51:54,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-07 01:51:57,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:51:57,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 1692 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:51:57,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:51:57,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 01:51:57,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 01:51:58,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2021-11-07 01:51:58,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 17 [2021-11-07 01:51:59,214 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 01:51:59,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:52:00,632 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 01:52:00,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843967249] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:52:00,632 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-11-07 01:52:00,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [5, 5, 5, 5] total 15 [2021-11-07 01:52:00,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998635598] [2021-11-07 01:52:00,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 01:52:00,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:52:00,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 01:52:00,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-11-07 01:52:00,634 INFO L87 Difference]: Start difference. First operand 7920 states and 11454 transitions. Second operand has 9 states, 9 states have (on average 19.0) internal successors, (171), 9 states have internal predecessors, (171), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-07 01:54:20,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:54:20,748 INFO L93 Difference]: Finished difference Result 21524 states and 31240 transitions. [2021-11-07 01:54:20,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:54:20,750 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 19.0) internal successors, (171), 9 states have internal predecessors, (171), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 152 [2021-11-07 01:54:20,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:54:20,811 INFO L225 Difference]: With dead ends: 21524 [2021-11-07 01:54:20,811 INFO L226 Difference]: Without dead ends: 13620 [2021-11-07 01:54:20,880 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 911 GetRequests, 895 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-11-07 01:54:20,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13620 states. [2021-11-07 01:54:21,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13620 to 7926. [2021-11-07 01:54:21,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7926 states, 7801 states have (on average 1.4451993334187925) internal successors, (11274), 7807 states have internal predecessors, (11274), 94 states have call successors, (94), 24 states have call predecessors, (94), 24 states have return successors, (94), 94 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-07 01:54:21,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7926 states to 7926 states and 11462 transitions. [2021-11-07 01:54:21,555 INFO L78 Accepts]: Start accepts. Automaton has 7926 states and 11462 transitions. Word has length 152 [2021-11-07 01:54:21,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:54:21,555 INFO L470 AbstractCegarLoop]: Abstraction has 7926 states and 11462 transitions. [2021-11-07 01:54:21,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 19.0) internal successors, (171), 9 states have internal predecessors, (171), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-07 01:54:21,558 INFO L276 IsEmpty]: Start isEmpty. Operand 7926 states and 11462 transitions. [2021-11-07 01:54:21,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-07 01:54:21,574 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:54:21,574 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:54:21,602 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2021-11-07 01:54:21,877 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-07 01:54:22,053 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-07 01:54:22,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:54:22,198 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:54:22,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:54:22,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1610847434, now seen corresponding path program 1 times [2021-11-07 01:54:22,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:54:22,201 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [629290548] [2021-11-07 01:54:22,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:54:22,202 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:54:22,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:54:22,203 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:54:22,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-07 01:54:24,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:54:24,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 1718 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:54:24,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:54:27,226 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:54:27,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:54:29,535 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:54:29,535 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:54:29,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [629290548] [2021-11-07 01:54:29,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [629290548] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:54:29,536 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [407858166] [2021-11-07 01:54:29,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:54:29,536 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:54:29,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:54:29,549 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:54:29,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-11-07 01:54:34,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:54:34,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 1718 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:54:34,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:54:36,120 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:54:36,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:54:37,761 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:54:37,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [407858166] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:54:37,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250356503] [2021-11-07 01:54:37,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:54:37,762 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:54:37,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:54:37,772 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:54:37,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-07 01:54:40,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:54:40,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 1718 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-07 01:54:40,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:54:42,391 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 01:54:42,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:54:44,128 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 01:54:44,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250356503] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:54:44,128 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-11-07 01:54:44,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [5, 5, 5, 5] total 16 [2021-11-07 01:54:44,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883992793] [2021-11-07 01:54:44,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 01:54:44,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:54:44,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 01:54:44,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:54:44,131 INFO L87 Difference]: Start difference. First operand 7926 states and 11462 transitions. Second operand has 10 states, 10 states have (on average 17.8) internal successors, (178), 10 states have internal predecessors, (178), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-07 01:55:30,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:55:30,396 INFO L93 Difference]: Finished difference Result 26458 states and 38516 transitions. [2021-11-07 01:55:30,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:55:30,397 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 17.8) internal successors, (178), 10 states have internal predecessors, (178), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 158 [2021-11-07 01:55:30,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:55:30,470 INFO L225 Difference]: With dead ends: 26458 [2021-11-07 01:55:30,471 INFO L226 Difference]: Without dead ends: 18548 [2021-11-07 01:55:30,500 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 949 GetRequests, 931 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-11-07 01:55:30,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18548 states. [2021-11-07 01:55:31,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18548 to 7934. [2021-11-07 01:55:31,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7934 states, 7809 states have (on average 1.4447432449737483) internal successors, (11282), 7815 states have internal predecessors, (11282), 94 states have call successors, (94), 24 states have call predecessors, (94), 24 states have return successors, (94), 94 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-07 01:55:31,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7934 states to 7934 states and 11470 transitions. [2021-11-07 01:55:31,407 INFO L78 Accepts]: Start accepts. Automaton has 7934 states and 11470 transitions. Word has length 158 [2021-11-07 01:55:31,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:55:31,408 INFO L470 AbstractCegarLoop]: Abstraction has 7934 states and 11470 transitions. [2021-11-07 01:55:31,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.8) internal successors, (178), 10 states have internal predecessors, (178), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-07 01:55:31,408 INFO L276 IsEmpty]: Start isEmpty. Operand 7934 states and 11470 transitions. [2021-11-07 01:55:31,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-07 01:55:31,433 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:55:31,433 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:55:31,486 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-07 01:55:31,677 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2021-11-07 01:55:31,909 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-07 01:55:32,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:55:32,047 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:55:32,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:55:32,048 INFO L85 PathProgramCache]: Analyzing trace with hash -590123806, now seen corresponding path program 1 times [2021-11-07 01:55:32,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:55:32,050 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [782146805] [2021-11-07 01:55:32,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:32,050 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:55:32,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:55:32,051 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:55:32,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-07 01:55:34,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:34,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 1744 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:55:34,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:55:37,239 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:55:37,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:55:39,762 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:55:39,762 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:55:39,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [782146805] [2021-11-07 01:55:39,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [782146805] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:55:39,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [776431376] [2021-11-07 01:55:39,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:39,763 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:55:39,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:55:39,763 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:55:39,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2021-11-07 01:55:44,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:44,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 1744 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:55:44,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:55:46,832 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:55:46,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:55:48,530 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:55:48,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [776431376] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:55:48,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078874967] [2021-11-07 01:55:48,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:48,531 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:55:48,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:55:48,532 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:55:48,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-07 01:55:51,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:51,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 1744 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:55:51,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:55:52,474 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 01:55:52,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:55:53,537 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 01:55:53,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078874967] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:55:53,538 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-11-07 01:55:53,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5, 5, 5] total 10 [2021-11-07 01:55:53,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760085672] [2021-11-07 01:55:53,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:55:53,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:55:53,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:55:53,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:55:53,539 INFO L87 Difference]: Start difference. First operand 7934 states and 11470 transitions. Second operand has 4 states, 4 states have (on average 39.5) internal successors, (158), 4 states have internal predecessors, (158), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-07 01:55:54,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:55:54,766 INFO L93 Difference]: Finished difference Result 17804 states and 26125 transitions. [2021-11-07 01:55:54,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:55:54,767 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.5) internal successors, (158), 4 states have internal predecessors, (158), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 164 [2021-11-07 01:55:54,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:55:54,831 INFO L225 Difference]: With dead ends: 17804 [2021-11-07 01:55:54,831 INFO L226 Difference]: Without dead ends: 9886 [2021-11-07 01:55:54,860 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 978 GetRequests, 970 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:55:54,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9886 states. [2021-11-07 01:55:55,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9886 to 8078. [2021-11-07 01:55:55,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8078 states, 7953 states have (on average 1.4387023764617126) internal successors, (11442), 7959 states have internal predecessors, (11442), 94 states have call successors, (94), 24 states have call predecessors, (94), 24 states have return successors, (94), 94 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-07 01:55:55,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8078 states to 8078 states and 11630 transitions. [2021-11-07 01:55:55,640 INFO L78 Accepts]: Start accepts. Automaton has 8078 states and 11630 transitions. Word has length 164 [2021-11-07 01:55:55,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:55:55,640 INFO L470 AbstractCegarLoop]: Abstraction has 8078 states and 11630 transitions. [2021-11-07 01:55:55,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.5) internal successors, (158), 4 states have internal predecessors, (158), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-07 01:55:55,641 INFO L276 IsEmpty]: Start isEmpty. Operand 8078 states and 11630 transitions. [2021-11-07 01:55:55,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-11-07 01:55:55,660 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:55:55,660 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:55:55,743 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-07 01:55:55,949 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-07 01:55:56,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2021-11-07 01:55:56,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:55:56,287 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:55:56,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:55:56,288 INFO L85 PathProgramCache]: Analyzing trace with hash -304095704, now seen corresponding path program 1 times [2021-11-07 01:55:56,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:55:56,291 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1814139680] [2021-11-07 01:55:56,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:56,291 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:55:56,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:55:56,293 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:55:56,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-07 01:55:59,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:59,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 1756 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:55:59,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:56:02,105 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:56:02,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:56:04,320 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:56:04,320 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:56:04,320 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1814139680] [2021-11-07 01:56:04,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1814139680] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:56:04,320 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [38362906] [2021-11-07 01:56:04,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:56:04,321 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:56:04,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:56:04,321 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:56:04,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2021-11-07 01:56:07,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:56:07,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 1756 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:56:07,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:56:08,731 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 01:56:08,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:56:09,717 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 01:56:09,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [38362906] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:56:09,718 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:56:09,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 10 [2021-11-07 01:56:09,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157208180] [2021-11-07 01:56:09,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:56:09,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:56:09,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:56:09,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:56:09,719 INFO L87 Difference]: Start difference. First operand 8078 states and 11630 transitions. Second operand has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-07 01:56:10,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:56:10,801 INFO L93 Difference]: Finished difference Result 17836 states and 26045 transitions. [2021-11-07 01:56:10,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:56:10,802 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 169 [2021-11-07 01:56:10,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:56:10,856 INFO L225 Difference]: With dead ends: 17836 [2021-11-07 01:56:10,856 INFO L226 Difference]: Without dead ends: 9774 [2021-11-07 01:56:10,957 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 673 GetRequests, 664 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:56:10,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9774 states. [2021-11-07 01:56:11,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9774 to 8110. [2021-11-07 01:56:11,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8110 states, 7985 states have (on average 1.436944270507201) internal successors, (11474), 7991 states have internal predecessors, (11474), 94 states have call successors, (94), 24 states have call predecessors, (94), 24 states have return successors, (94), 94 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-07 01:56:11,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8110 states to 8110 states and 11662 transitions. [2021-11-07 01:56:11,625 INFO L78 Accepts]: Start accepts. Automaton has 8110 states and 11662 transitions. Word has length 169 [2021-11-07 01:56:11,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:56:11,626 INFO L470 AbstractCegarLoop]: Abstraction has 8110 states and 11662 transitions. [2021-11-07 01:56:11,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-07 01:56:11,627 INFO L276 IsEmpty]: Start isEmpty. Operand 8110 states and 11662 transitions. [2021-11-07 01:56:11,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-11-07 01:56:11,640 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:56:11,640 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:56:11,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-11-07 01:56:11,886 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 0 [2021-11-07 01:56:12,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:56:12,063 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:56:12,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:56:12,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1705825634, now seen corresponding path program 1 times [2021-11-07 01:56:12,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:56:12,066 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2061381766] [2021-11-07 01:56:12,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:56:12,067 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:56:12,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:56:12,068 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:56:12,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-11-07 01:56:15,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:56:15,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 1772 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:56:15,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:56:18,151 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 01:56:18,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:56:20,613 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 01:56:20,613 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:56:20,614 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2061381766] [2021-11-07 01:56:20,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2061381766] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:56:20,614 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [492200868] [2021-11-07 01:56:20,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:56:20,615 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:56:20,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:56:20,623 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:56:20,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2021-11-07 01:56:26,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:56:26,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 1772 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:56:26,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:56:28,433 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 01:56:28,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:56:30,286 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 01:56:30,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [492200868] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:56:30,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143705601] [2021-11-07 01:56:30,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:56:30,287 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:56:30,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:56:30,288 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:56:30,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-07 01:56:33,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:56:33,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 1772 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:56:33,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:56:37,591 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 01:56:37,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:56:40,692 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 01:56:40,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143705601] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:56:40,692 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-11-07 01:56:40,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [5, 5, 5, 5] total 12 [2021-11-07 01:56:40,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569608506] [2021-11-07 01:56:40,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:56:40,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:56:40,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:56:40,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:56:40,695 INFO L87 Difference]: Start difference. First operand 8110 states and 11662 transitions. Second operand has 6 states, 6 states have (on average 46.666666666666664) internal successors, (280), 6 states have internal predecessors, (280), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-07 01:56:41,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:56:41,931 INFO L93 Difference]: Finished difference Result 17368 states and 25026 transitions. [2021-11-07 01:56:41,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:56:41,932 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 46.666666666666664) internal successors, (280), 6 states have internal predecessors, (280), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 174 [2021-11-07 01:56:41,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:56:41,973 INFO L225 Difference]: With dead ends: 17368 [2021-11-07 01:56:41,973 INFO L226 Difference]: Without dead ends: 9274 [2021-11-07 01:56:41,998 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1039 GetRequests, 1028 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:56:42,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9274 states. [2021-11-07 01:56:42,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9274 to 8110. [2021-11-07 01:56:42,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8110 states, 7985 states have (on average 1.4366938008766437) internal successors, (11472), 7991 states have internal predecessors, (11472), 94 states have call successors, (94), 24 states have call predecessors, (94), 24 states have return successors, (94), 94 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-07 01:56:42,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8110 states to 8110 states and 11660 transitions. [2021-11-07 01:56:42,838 INFO L78 Accepts]: Start accepts. Automaton has 8110 states and 11660 transitions. Word has length 174 [2021-11-07 01:56:42,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:56:42,838 INFO L470 AbstractCegarLoop]: Abstraction has 8110 states and 11660 transitions. [2021-11-07 01:56:42,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 46.666666666666664) internal successors, (280), 6 states have internal predecessors, (280), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-07 01:56:42,839 INFO L276 IsEmpty]: Start isEmpty. Operand 8110 states and 11660 transitions. [2021-11-07 01:56:42,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-11-07 01:56:42,851 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:56:42,851 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:56:42,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-11-07 01:56:43,122 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-11-07 01:56:43,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (37)] Forceful destruction successful, exit code 0 [2021-11-07 01:56:43,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:56:43,467 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:56:43,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:56:43,468 INFO L85 PathProgramCache]: Analyzing trace with hash 139067684, now seen corresponding path program 1 times [2021-11-07 01:56:43,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:56:43,470 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1451580083] [2021-11-07 01:56:43,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:56:43,470 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:56:43,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:56:43,472 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:56:43,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-11-07 01:56:46,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:56:46,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 1772 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:56:46,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:56:49,572 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 01:56:49,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:56:52,030 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 01:56:52,030 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:56:52,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1451580083] [2021-11-07 01:56:52,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1451580083] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:56:52,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [754979362] [2021-11-07 01:56:52,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:56:52,031 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:56:52,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:56:52,038 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:56:52,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2021-11-07 01:56:58,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:56:58,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 1772 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:56:58,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:57:00,260 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 01:57:00,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:57:02,003 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 01:57:02,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [754979362] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:57:02,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397771914] [2021-11-07 01:57:02,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:57:02,004 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:57:02,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:57:02,005 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:57:02,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-07 01:57:05,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:57:06,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 1772 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 01:57:06,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:57:06,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 01:57:06,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 01:57:07,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 74 [2021-11-07 01:57:07,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 68 [2021-11-07 01:57:07,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 110 [2021-11-07 01:57:07,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 153 [2021-11-07 01:57:09,091 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 01:57:09,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:57:10,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 35 [2021-11-07 01:57:10,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 33 [2021-11-07 01:57:11,675 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 01:57:11,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397771914] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:57:11,676 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-11-07 01:57:11,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [5, 5, 5, 5] total 15 [2021-11-07 01:57:11,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995632623] [2021-11-07 01:57:11,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 01:57:11,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:57:11,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 01:57:11,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-11-07 01:57:11,679 INFO L87 Difference]: Start difference. First operand 8110 states and 11660 transitions. Second operand has 9 states, 9 states have (on average 22.333333333333332) internal successors, (201), 9 states have internal predecessors, (201), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-07 01:59:21,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:59:21,691 INFO L93 Difference]: Finished difference Result 22352 states and 32298 transitions. [2021-11-07 01:59:21,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 01:59:21,693 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 22.333333333333332) internal successors, (201), 9 states have internal predecessors, (201), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 174 [2021-11-07 01:59:21,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:59:21,758 INFO L225 Difference]: With dead ends: 22352 [2021-11-07 01:59:21,758 INFO L226 Difference]: Without dead ends: 14258 [2021-11-07 01:59:21,781 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1046 GetRequests, 1027 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-11-07 01:59:21,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14258 states. [2021-11-07 01:59:22,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14258 to 8134. [2021-11-07 01:59:22,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8134 states, 8009 states have (on average 1.4356349107254338) internal successors, (11498), 8015 states have internal predecessors, (11498), 94 states have call successors, (94), 24 states have call predecessors, (94), 24 states have return successors, (94), 94 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-07 01:59:22,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8134 states to 8134 states and 11686 transitions. [2021-11-07 01:59:22,509 INFO L78 Accepts]: Start accepts. Automaton has 8134 states and 11686 transitions. Word has length 174 [2021-11-07 01:59:22,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:59:22,509 INFO L470 AbstractCegarLoop]: Abstraction has 8134 states and 11686 transitions. [2021-11-07 01:59:22,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 22.333333333333332) internal successors, (201), 9 states have internal predecessors, (201), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-07 01:59:22,510 INFO L276 IsEmpty]: Start isEmpty. Operand 8134 states and 11686 transitions. [2021-11-07 01:59:22,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-11-07 01:59:22,516 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:59:22,516 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:59:22,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (40)] Forceful destruction successful, exit code 0 [2021-11-07 01:59:22,774 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2021-11-07 01:59:22,996 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-11-07 01:59:23,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:59:23,131 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:59:23,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:59:23,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1219542012, now seen corresponding path program 1 times [2021-11-07 01:59:23,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:59:23,134 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1356486131] [2021-11-07 01:59:23,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:59:23,134 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:59:23,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:59:23,135 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:59:23,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2021-11-07 01:59:26,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:59:26,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 1798 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:59:26,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:59:29,343 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 01:59:29,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:59:31,706 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 01:59:31,706 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:59:31,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1356486131] [2021-11-07 01:59:31,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1356486131] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:59:31,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1209536771] [2021-11-07 01:59:31,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:59:31,707 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:59:31,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:59:31,708 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:59:31,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process [2021-11-07 01:59:37,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:59:37,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 1798 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:59:37,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:59:40,141 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 01:59:40,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:59:41,918 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 01:59:41,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1209536771] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:59:41,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117527352] [2021-11-07 01:59:41,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:59:41,919 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:59:41,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:59:41,935 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:59:41,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-11-07 01:59:45,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:59:46,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 1798 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:59:46,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:59:48,241 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 01:59:48,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:59:50,727 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 01:59:50,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117527352] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:59:50,728 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:59:50,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 10 [2021-11-07 01:59:50,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949707259] [2021-11-07 01:59:50,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 01:59:50,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:59:50,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 01:59:50,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:59:50,731 INFO L87 Difference]: Start difference. First operand 8134 states and 11686 transitions. Second operand has 10 states, 10 states have (on average 20.3) internal successors, (203), 10 states have internal predecessors, (203), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-07 01:59:52,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:59:52,462 INFO L93 Difference]: Finished difference Result 16258 states and 23365 transitions. [2021-11-07 01:59:52,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:59:52,464 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 20.3) internal successors, (203), 10 states have internal predecessors, (203), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 180 [2021-11-07 01:59:52,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:59:52,485 INFO L225 Difference]: With dead ends: 16258 [2021-11-07 01:59:52,485 INFO L226 Difference]: Without dead ends: 8138 [2021-11-07 01:59:52,507 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1075 GetRequests, 1066 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:59:52,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8138 states. [2021-11-07 01:59:53,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8138 to 8138. [2021-11-07 01:59:53,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8138 states, 8013 states have (on average 1.4355422438537377) internal successors, (11503), 8019 states have internal predecessors, (11503), 94 states have call successors, (94), 24 states have call predecessors, (94), 24 states have return successors, (94), 94 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-07 01:59:53,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8138 states to 8138 states and 11691 transitions. [2021-11-07 01:59:53,215 INFO L78 Accepts]: Start accepts. Automaton has 8138 states and 11691 transitions. Word has length 180 [2021-11-07 01:59:53,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:59:53,215 INFO L470 AbstractCegarLoop]: Abstraction has 8138 states and 11691 transitions. [2021-11-07 01:59:53,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 20.3) internal successors, (203), 10 states have internal predecessors, (203), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-07 01:59:53,215 INFO L276 IsEmpty]: Start isEmpty. Operand 8138 states and 11691 transitions. [2021-11-07 01:59:53,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-11-07 01:59:53,220 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:59:53,220 INFO L513 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:59:53,283 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-11-07 01:59:53,463 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2021-11-07 01:59:53,646 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (43)] Forceful destruction successful, exit code 0 [2021-11-07 01:59:53,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:59:53,821 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-11-07 01:59:53,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:59:53,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1389615484, now seen corresponding path program 2 times [2021-11-07 01:59:53,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:59:53,824 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [93514421] [2021-11-07 01:59:53,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:59:53,824 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:59:53,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:59:53,825 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:59:53,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a8c4a55-e251-4908-8c5e-91fa1df51b58/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process