./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--media--usb--ttusb-dec--ttusb_dec.ko-ldv_main0.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_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/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_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--media--usb--ttusb-dec--ttusb_dec.ko-ldv_main0.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/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_37640c46-5585-4128-a448-28a6138bbdfe/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 106df4f5c2a241158f9b42d6bacea5fef4152f7015c080096ac6f687357e10b4 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:08:12,747 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:08:12,749 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:08:12,800 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:08:12,801 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:08:12,806 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:08:12,808 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:08:12,812 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:08:12,815 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:08:12,822 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:08:12,823 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:08:12,825 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:08:12,825 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:08:12,826 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:08:12,828 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:08:12,829 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:08:12,830 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:08:12,832 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:08:12,834 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:08:12,836 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:08:12,842 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:08:12,843 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:08:12,845 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:08:12,847 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:08:12,853 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:08:12,857 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:08:12,857 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:08:12,860 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:08:12,860 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:08:12,862 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:08:12,863 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:08:12,864 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:08:12,866 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:08:12,868 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:08:12,869 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:08:12,870 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:08:12,870 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:08:12,871 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:08:12,871 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:08:12,872 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:08:12,873 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:08:12,874 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-07 01:08:12,915 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:08:12,924 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:08:12,926 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:08:12,926 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:08:12,926 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:08:12,926 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:08:12,927 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:08:12,927 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:08:12,927 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:08:12,927 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:08:12,927 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:08:12,927 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:08:12,928 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:08:12,928 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:08:12,928 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:08:12,929 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:08:12,929 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:08:12,929 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:08:12,929 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:08:12,930 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:08:12,930 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:08:12,930 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:08:12,930 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:08:12,930 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:08:12,931 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:08:12,931 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:08:12,931 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:08:12,931 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:08:12,932 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:08:12,932 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:08:12,932 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:08:12,932 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:08:12,932 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:08:12,933 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:08:12,933 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:08:12,933 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:08:12,933 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_37640c46-5585-4128-a448-28a6138bbdfe/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 106df4f5c2a241158f9b42d6bacea5fef4152f7015c080096ac6f687357e10b4 [2021-11-07 01:08:13,174 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:08:13,197 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:08:13,200 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:08:13,202 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:08:13,203 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:08:13,204 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--media--usb--ttusb-dec--ttusb_dec.ko-ldv_main0.cil.out.i [2021-11-07 01:08:13,267 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/data/4e1aa1c2e/8e14396212bd45cbbd478b7c2eebf289/FLAG7624cdce3 [2021-11-07 01:08:14,154 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:08:14,155 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--media--usb--ttusb-dec--ttusb_dec.ko-ldv_main0.cil.out.i [2021-11-07 01:08:14,200 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/data/4e1aa1c2e/8e14396212bd45cbbd478b7c2eebf289/FLAG7624cdce3 [2021-11-07 01:08:14,594 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/data/4e1aa1c2e/8e14396212bd45cbbd478b7c2eebf289 [2021-11-07 01:08:14,597 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:08:14,598 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:08:14,600 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:08:14,600 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:08:14,603 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:08:14,604 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:08:14" (1/1) ... [2021-11-07 01:08:14,605 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41cafdbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:08:14, skipping insertion in model container [2021-11-07 01:08:14,605 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:08:14" (1/1) ... [2021-11-07 01:08:14,612 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:08:14,739 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:08:15,881 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 01:08:15,943 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 01:08:15,948 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 01:08:16,059 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 01:08:16,064 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 01:08:16,125 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 01:08:16,155 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 01:08:16,165 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 01:08:16,190 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 01:08:16,195 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 01:08:16,196 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 01:08:16,351 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 01:08:16,359 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 01:08:16,369 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 01:08:16,399 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--media--usb--ttusb-dec--ttusb_dec.ko-ldv_main0.cil.out.i[247200,247213] [2021-11-07 01:08:16,503 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:08:16,530 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 01:08:16,531 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4d54fae6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:08:16, skipping insertion in model container [2021-11-07 01:08:16,531 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:08:16,531 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:08:16,534 INFO L168 Benchmark]: Toolchain (without parser) took 1933.94 ms. Allocated memory was 117.4 MB in the beginning and 161.5 MB in the end (delta: 44.0 MB). Free memory was 81.6 MB in the beginning and 95.5 MB in the end (delta: -13.9 MB). Peak memory consumption was 46.9 MB. Max. memory is 16.1 GB. [2021-11-07 01:08:16,535 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 117.4 MB. Free memory was 75.2 MB in the beginning and 75.1 MB in the end (delta: 134.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:08:16,536 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1931.57 ms. Allocated memory was 117.4 MB in the beginning and 161.5 MB in the end (delta: 44.0 MB). Free memory was 81.2 MB in the beginning and 95.5 MB in the end (delta: -14.3 MB). Peak memory consumption was 44.8 MB. Max. memory is 16.1 GB. [2021-11-07 01:08:16,538 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 117.4 MB. Free memory was 75.2 MB in the beginning and 75.1 MB in the end (delta: 134.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 1931.57 ms. Allocated memory was 117.4 MB in the beginning and 161.5 MB in the end (delta: 44.0 MB). Free memory was 81.2 MB in the beginning and 95.5 MB in the end (delta: -14.3 MB). Peak memory consumption was 44.8 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 6459]: 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_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/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_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--media--usb--ttusb-dec--ttusb_dec.ko-ldv_main0.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/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_37640c46-5585-4128-a448-28a6138bbdfe/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 106df4f5c2a241158f9b42d6bacea5fef4152f7015c080096ac6f687357e10b4 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:08:18,664 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:08:18,667 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:08:18,716 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:08:18,717 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:08:18,721 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:08:18,722 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:08:18,727 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:08:18,730 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:08:18,738 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:08:18,739 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:08:18,741 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:08:18,742 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:08:18,744 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:08:18,746 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:08:18,751 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:08:18,752 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:08:18,753 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:08:18,759 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:08:18,766 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:08:18,768 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:08:18,769 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:08:18,772 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:08:18,774 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:08:18,783 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:08:18,783 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:08:18,784 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:08:18,786 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:08:18,787 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:08:18,788 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:08:18,788 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:08:18,789 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:08:18,791 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:08:18,792 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:08:18,794 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:08:18,794 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:08:18,795 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:08:18,796 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:08:18,796 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:08:18,798 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:08:18,799 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:08:18,804 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-07 01:08:18,845 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:08:18,846 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:08:18,848 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:08:18,848 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:08:18,848 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:08:18,849 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:08:18,849 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:08:18,849 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:08:18,849 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:08:18,851 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:08:18,852 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:08:18,852 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:08:18,853 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:08:18,853 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:08:18,853 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:08:18,853 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:08:18,854 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:08:18,854 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:08:18,854 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:08:18,855 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:08:18,855 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:08:18,855 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:08:18,855 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:08:18,856 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:08:18,856 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:08:18,856 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:08:18,857 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:08:18,857 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:08:18,857 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:08:18,857 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:08:18,858 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:08:18,858 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:08:18,858 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_37640c46-5585-4128-a448-28a6138bbdfe/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 106df4f5c2a241158f9b42d6bacea5fef4152f7015c080096ac6f687357e10b4 [2021-11-07 01:08:19,257 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:08:19,284 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:08:19,286 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:08:19,288 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:08:19,288 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:08:19,289 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--media--usb--ttusb-dec--ttusb_dec.ko-ldv_main0.cil.out.i [2021-11-07 01:08:19,360 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/data/7447d3a64/428f8d33c9bf41cfa287ea9a3e164085/FLAG22c160153 [2021-11-07 01:08:20,248 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:08:20,249 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--media--usb--ttusb-dec--ttusb_dec.ko-ldv_main0.cil.out.i [2021-11-07 01:08:20,289 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/data/7447d3a64/428f8d33c9bf41cfa287ea9a3e164085/FLAG22c160153 [2021-11-07 01:08:20,699 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/data/7447d3a64/428f8d33c9bf41cfa287ea9a3e164085 [2021-11-07 01:08:20,701 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:08:20,703 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:08:20,704 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:08:20,705 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:08:20,714 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:08:20,715 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:08:20" (1/1) ... [2021-11-07 01:08:20,716 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75c26237 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:08:20, skipping insertion in model container [2021-11-07 01:08:20,716 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:08:20" (1/1) ... [2021-11-07 01:08:20,723 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:08:20,841 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:08:22,601 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_37640c46-5585-4128-a448-28a6138bbdfe/sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--media--usb--ttusb-dec--ttusb_dec.ko-ldv_main0.cil.out.i[247200,247213] [2021-11-07 01:08:22,717 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:08:22,748 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:08:22,803 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:08:23,179 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_37640c46-5585-4128-a448-28a6138bbdfe/sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--media--usb--ttusb-dec--ttusb_dec.ko-ldv_main0.cil.out.i[247200,247213] [2021-11-07 01:08:23,197 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:08:23,212 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:08:23,572 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_37640c46-5585-4128-a448-28a6138bbdfe/sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--media--usb--ttusb-dec--ttusb_dec.ko-ldv_main0.cil.out.i[247200,247213] [2021-11-07 01:08:23,585 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:08:23,663 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:08:23,664 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:08:23 WrapperNode [2021-11-07 01:08:23,664 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:08:23,665 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:08:23,666 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:08:23,666 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:08:23,673 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:08:23" (1/1) ... [2021-11-07 01:08:23,784 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:08:23" (1/1) ... [2021-11-07 01:08:24,081 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:08:24,082 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:08:24,082 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:08:24,082 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:08:24,090 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:08:23" (1/1) ... [2021-11-07 01:08:24,091 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:08:23" (1/1) ... [2021-11-07 01:08:24,142 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:08:23" (1/1) ... [2021-11-07 01:08:24,146 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:08:23" (1/1) ... [2021-11-07 01:08:24,416 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:08:23" (1/1) ... [2021-11-07 01:08:24,451 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:08:23" (1/1) ... [2021-11-07 01:08:24,474 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:08:23" (1/1) ... [2021-11-07 01:08:24,514 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:08:24,515 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:08:24,515 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:08:24,515 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:08:24,516 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:08:23" (1/1) ... [2021-11-07 01:08:24,523 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:08:24,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:08:24,546 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:08:24,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:08:24,703 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-07 01:08:24,703 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-07 01:08:24,704 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-07 01:08:24,704 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-07 01:08:24,704 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-07 01:08:24,704 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-07 01:08:24,704 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:08:24,705 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 01:08:24,705 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-07 01:08:24,705 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-07 01:08:24,705 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-07 01:08:24,705 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 01:08:24,705 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-07 01:08:24,706 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-07 01:08:24,706 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2021-11-07 01:08:24,706 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:08:24,706 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-07 01:08:24,706 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2021-11-07 01:08:24,706 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-07 01:08:24,707 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2021-11-07 01:08:24,707 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 01:08:24,707 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 01:08:24,707 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2021-11-07 01:08:24,707 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2021-11-07 01:08:24,707 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-07 01:08:24,708 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-07 01:08:24,709 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:08:24,709 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:11:45,794 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:11:45,795 INFO L299 CfgBuilder]: Removed 1570 assume(true) statements. [2021-11-07 01:11:45,801 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:11:45 BoogieIcfgContainer [2021-11-07 01:11:45,801 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:11:45,804 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:11:45,804 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:11:45,808 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:11:45,808 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:08:20" (1/3) ... [2021-11-07 01:11:45,809 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@343efc56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:11:45, skipping insertion in model container [2021-11-07 01:11:45,810 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:08:23" (2/3) ... [2021-11-07 01:11:45,810 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@343efc56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:11:45, skipping insertion in model container [2021-11-07 01:11:45,810 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:11:45" (3/3) ... [2021-11-07 01:11:45,812 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.8-rc1-32_7a-drivers--media--usb--ttusb-dec--ttusb_dec.ko-ldv_main0.cil.out.i [2021-11-07 01:11:45,819 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:11:45,819 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 62 error locations. [2021-11-07 01:11:45,884 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:11:45,891 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 01:11:45,892 INFO L340 AbstractCegarLoop]: Starting to check reachability of 62 error locations. [2021-11-07 01:11:45,957 INFO L276 IsEmpty]: Start isEmpty. Operand has 1769 states, 1706 states have (on average 1.4425556858147714) internal successors, (2461), 1768 states have internal predecessors, (2461), 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 01:11:45,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-07 01:11:45,967 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:11:45,968 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-07 01:11:45,970 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr58ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 59 more)] === [2021-11-07 01:11:45,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:11:45,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1070827562, now seen corresponding path program 1 times [2021-11-07 01:11:46,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:11:46,006 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1978125704] [2021-11-07 01:11:46,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:46,008 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:11:46,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:11:46,015 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:11:46,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:11:48,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:48,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 793 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:11:48,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:11:48,743 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 01:11:48,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:11:48,841 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 01:11:48,842 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:11:48,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1978125704] [2021-11-07 01:11:48,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1978125704] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:11:48,843 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:11:48,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:11:48,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626526473] [2021-11-07 01:11:48,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:11:48,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:11:48,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:11:48,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:11:48,879 INFO L87 Difference]: Start difference. First operand has 1769 states, 1706 states have (on average 1.4425556858147714) internal successors, (2461), 1768 states have internal predecessors, (2461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 01:11:51,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:11:51,816 INFO L93 Difference]: Finished difference Result 5256 states and 7326 transitions. [2021-11-07 01:11:51,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:11:51,818 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 6 [2021-11-07 01:11:51,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:11:51,876 INFO L225 Difference]: With dead ends: 5256 [2021-11-07 01:11:51,876 INFO L226 Difference]: Without dead ends: 3479 [2021-11-07 01:11:51,892 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:11:51,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3479 states. [2021-11-07 01:11:52,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3479 to 3371. [2021-11-07 01:11:52,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3371 states, 3309 states have (on average 1.396796615291629) internal successors, (4622), 3370 states have internal predecessors, (4622), 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 01:11:52,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3371 states to 3371 states and 4622 transitions. [2021-11-07 01:11:52,145 INFO L78 Accepts]: Start accepts. Automaton has 3371 states and 4622 transitions. Word has length 6 [2021-11-07 01:11:52,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:11:52,146 INFO L470 AbstractCegarLoop]: Abstraction has 3371 states and 4622 transitions. [2021-11-07 01:11:52,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 01:11:52,147 INFO L276 IsEmpty]: Start isEmpty. Operand 3371 states and 4622 transitions. [2021-11-07 01:11:52,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-07 01:11:52,147 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:11:52,148 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:11:52,190 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-07 01:11:52,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:11:52,368 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr59ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 59 more)] === [2021-11-07 01:11:52,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:11:52,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1164079702, now seen corresponding path program 1 times [2021-11-07 01:11:52,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:11:52,381 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2143615830] [2021-11-07 01:11:52,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:52,382 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:11:52,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:11:52,389 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:11:52,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:11:54,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:54,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 794 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:11:54,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:11:55,111 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 01:11:55,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:11:55,215 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 01:11:55,215 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:11:55,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2143615830] [2021-11-07 01:11:55,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2143615830] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:11:55,216 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:11:55,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:11:55,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52145885] [2021-11-07 01:11:55,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:11:55,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:11:55,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:11:55,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:11:55,220 INFO L87 Difference]: Start difference. First operand 3371 states and 4622 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 01:11:57,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:11:57,524 INFO L93 Difference]: Finished difference Result 3371 states and 4622 transitions. [2021-11-07 01:11:57,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:11:57,525 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 7 [2021-11-07 01:11:57,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:11:57,550 INFO L225 Difference]: With dead ends: 3371 [2021-11-07 01:11:57,551 INFO L226 Difference]: Without dead ends: 3369 [2021-11-07 01:11:57,553 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:11:57,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3369 states. [2021-11-07 01:11:57,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3369 to 3369. [2021-11-07 01:11:57,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3369 states, 3308 states have (on average 1.396614268440145) internal successors, (4620), 3368 states have internal predecessors, (4620), 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 01:11:57,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3369 states to 3369 states and 4620 transitions. [2021-11-07 01:11:57,722 INFO L78 Accepts]: Start accepts. Automaton has 3369 states and 4620 transitions. Word has length 7 [2021-11-07 01:11:57,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:11:57,722 INFO L470 AbstractCegarLoop]: Abstraction has 3369 states and 4620 transitions. [2021-11-07 01:11:57,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 01:11:57,723 INFO L276 IsEmpty]: Start isEmpty. Operand 3369 states and 4620 transitions. [2021-11-07 01:11:57,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-07 01:11:57,724 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:11:57,724 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:11:57,758 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:11:57,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:11:57,949 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr60ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 59 more)] === [2021-11-07 01:11:57,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:11:57,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1726728140, now seen corresponding path program 1 times [2021-11-07 01:11:57,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:11:57,951 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1916623323] [2021-11-07 01:11:57,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:57,952 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:11:57,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:11:57,955 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:11:57,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:12:00,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:12:00,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 795 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:12:00,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:12:00,257 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 01:12:00,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:12:00,396 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 01:12:00,397 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:12:00,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1916623323] [2021-11-07 01:12:00,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1916623323] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:12:00,398 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:12:00,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:12:00,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625770126] [2021-11-07 01:12:00,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:12:00,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:12:00,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:12:00,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:12:00,400 INFO L87 Difference]: Start difference. First operand 3369 states and 4620 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 01:12:02,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:12:02,788 INFO L93 Difference]: Finished difference Result 3369 states and 4620 transitions. [2021-11-07 01:12:02,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:12:02,788 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 8 [2021-11-07 01:12:02,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:12:02,814 INFO L225 Difference]: With dead ends: 3369 [2021-11-07 01:12:02,814 INFO L226 Difference]: Without dead ends: 3367 [2021-11-07 01:12:02,815 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:12:02,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3367 states. [2021-11-07 01:12:02,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3367 to 3367. [2021-11-07 01:12:02,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3367 states, 3307 states have (on average 1.396431811309344) internal successors, (4618), 3366 states have internal predecessors, (4618), 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 01:12:02,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3367 states to 3367 states and 4618 transitions. [2021-11-07 01:12:02,995 INFO L78 Accepts]: Start accepts. Automaton has 3367 states and 4618 transitions. Word has length 8 [2021-11-07 01:12:02,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:12:02,996 INFO L470 AbstractCegarLoop]: Abstraction has 3367 states and 4618 transitions. [2021-11-07 01:12:02,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 01:12:02,997 INFO L276 IsEmpty]: Start isEmpty. Operand 3367 states and 4618 transitions. [2021-11-07 01:12:02,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-07 01:12:02,998 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:12:02,998 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:12:03,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:12:03,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:12:03,221 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr61ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 59 more)] === [2021-11-07 01:12:03,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:12:03,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1988960524, now seen corresponding path program 1 times [2021-11-07 01:12:03,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:12:03,224 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [959312771] [2021-11-07 01:12:03,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:12:03,224 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:12:03,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:12:03,228 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:12:03,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:12:05,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:12:05,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 796 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:12:05,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:12:05,835 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 01:12:05,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:12:06,001 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 01:12:06,001 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:12:06,001 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [959312771] [2021-11-07 01:12:06,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [959312771] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:12:06,002 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:12:06,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:12:06,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75025292] [2021-11-07 01:12:06,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:12:06,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:12:06,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:12:06,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:12:06,004 INFO L87 Difference]: Start difference. First operand 3367 states and 4618 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 01:12:10,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:12:10,284 INFO L93 Difference]: Finished difference Result 9735 states and 13477 transitions. [2021-11-07 01:12:10,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:12:10,284 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 9 [2021-11-07 01:12:10,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:12:10,322 INFO L225 Difference]: With dead ends: 9735 [2021-11-07 01:12:10,322 INFO L226 Difference]: Without dead ends: 6366 [2021-11-07 01:12:10,329 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:12:10,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6366 states. [2021-11-07 01:12:10,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6366 to 5900. [2021-11-07 01:12:10,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5900 states, 5840 states have (on average 1.3960616438356164) internal successors, (8153), 5899 states have internal predecessors, (8153), 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 01:12:10,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5900 states to 5900 states and 8153 transitions. [2021-11-07 01:12:10,630 INFO L78 Accepts]: Start accepts. Automaton has 5900 states and 8153 transitions. Word has length 9 [2021-11-07 01:12:10,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:12:10,631 INFO L470 AbstractCegarLoop]: Abstraction has 5900 states and 8153 transitions. [2021-11-07 01:12:10,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 01:12:10,632 INFO L276 IsEmpty]: Start isEmpty. Operand 5900 states and 8153 transitions. [2021-11-07 01:12:10,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-07 01:12:10,645 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:12:10,648 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:12:10,681 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:12:10,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:12:10,867 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 59 more)] === [2021-11-07 01:12:10,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:12:10,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1584398266, now seen corresponding path program 1 times [2021-11-07 01:12:10,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:12:10,870 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1305289114] [2021-11-07 01:12:10,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:12:10,871 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:12:10,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:12:10,874 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:12:10,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:12:13,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:12:13,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 1185 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 01:12:13,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:12:15,093 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 01:12:15,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:12:16,582 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 01:12:16,582 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:12:16,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1305289114] [2021-11-07 01:12:16,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1305289114] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:12:16,583 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:12:16,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-07 01:12:16,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995321993] [2021-11-07 01:12:16,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:12:16,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:12:16,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:12:16,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:12:16,585 INFO L87 Difference]: Start difference. First operand 5900 states and 8153 transitions. Second operand has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 12 states have internal predecessors, (68), 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 01:12:31,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:12:31,680 INFO L93 Difference]: Finished difference Result 45924 states and 64501 transitions. [2021-11-07 01:12:31,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-07 01:12:31,681 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 12 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-07 01:12:31,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:12:31,839 INFO L225 Difference]: With dead ends: 45924 [2021-11-07 01:12:31,840 INFO L226 Difference]: Without dead ends: 40026 [2021-11-07 01:12:31,862 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=201, Invalid=555, Unknown=0, NotChecked=0, Total=756 [2021-11-07 01:12:31,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40026 states. [2021-11-07 01:12:32,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40026 to 5920. [2021-11-07 01:12:32,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5920 states, 5860 states have (on average 1.3947098976109216) internal successors, (8173), 5919 states have internal predecessors, (8173), 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 01:12:32,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5920 states to 5920 states and 8173 transitions. [2021-11-07 01:12:32,847 INFO L78 Accepts]: Start accepts. Automaton has 5920 states and 8173 transitions. Word has length 62 [2021-11-07 01:12:32,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:12:32,848 INFO L470 AbstractCegarLoop]: Abstraction has 5920 states and 8173 transitions. [2021-11-07 01:12:32,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 12 states have internal predecessors, (68), 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 01:12:32,849 INFO L276 IsEmpty]: Start isEmpty. Operand 5920 states and 8173 transitions. [2021-11-07 01:12:32,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 01:12:32,851 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:12:32,852 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:12:32,892 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:12:33,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:12:33,069 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 59 more)] === [2021-11-07 01:12:33,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:12:33,069 INFO L85 PathProgramCache]: Analyzing trace with hash 875661092, now seen corresponding path program 1 times [2021-11-07 01:12:33,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:12:33,072 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1581467111] [2021-11-07 01:12:33,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:12:33,072 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:12:33,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:12:33,075 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:12:33,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:12:35,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:12:35,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 1200 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:12:35,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:12:36,361 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 01:12:36,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:12:36,895 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 01:12:36,895 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:12:36,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1581467111] [2021-11-07 01:12:36,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1581467111] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:12:36,896 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:12:36,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:12:36,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113288010] [2021-11-07 01:12:36,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:12:36,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:12:36,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:12:36,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:12:36,898 INFO L87 Difference]: Start difference. First operand 5920 states and 8173 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:38,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:12:38,020 INFO L93 Difference]: Finished difference Result 11838 states and 16344 transitions. [2021-11-07 01:12:38,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:12:38,021 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-07 01:12:38,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:12:38,034 INFO L225 Difference]: With dead ends: 11838 [2021-11-07 01:12:38,034 INFO L226 Difference]: Without dead ends: 5920 [2021-11-07 01:12:38,043 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:12:38,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5920 states. [2021-11-07 01:12:38,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5920 to 5920. [2021-11-07 01:12:38,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5920 states, 5860 states have (on average 1.3919795221843003) internal successors, (8157), 5919 states have internal predecessors, (8157), 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 01:12:38,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5920 states to 5920 states and 8157 transitions. [2021-11-07 01:12:38,596 INFO L78 Accepts]: Start accepts. Automaton has 5920 states and 8157 transitions. Word has length 65 [2021-11-07 01:12:38,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:12:38,596 INFO L470 AbstractCegarLoop]: Abstraction has 5920 states and 8157 transitions. [2021-11-07 01:12:38,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:38,597 INFO L276 IsEmpty]: Start isEmpty. Operand 5920 states and 8157 transitions. [2021-11-07 01:12:38,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 01:12:38,598 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:12:38,598 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:12:38,629 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-11-07 01:12:38,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:12:38,799 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 59 more)] === [2021-11-07 01:12:38,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:12:38,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1874122280, now seen corresponding path program 1 times [2021-11-07 01:12:38,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:12:38,801 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [496761005] [2021-11-07 01:12:38,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:12:38,802 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:12:38,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:12:38,803 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:12:38,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:12:41,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:12:41,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 1202 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:12:41,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:12:42,274 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 01:12:42,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:12:43,028 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 01:12:43,028 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:12:43,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [496761005] [2021-11-07 01:12:43,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [496761005] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:12:43,028 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:12:43,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 01:12:43,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354517701] [2021-11-07 01:12:43,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:12:43,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:12:43,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:12:43,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:12:43,031 INFO L87 Difference]: Start difference. First operand 5920 states and 8157 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 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 01:12:44,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:12:44,427 INFO L93 Difference]: Finished difference Result 11838 states and 16312 transitions. [2021-11-07 01:12:44,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:12:44,428 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 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 66 [2021-11-07 01:12:44,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:12:44,439 INFO L225 Difference]: With dead ends: 11838 [2021-11-07 01:12:44,439 INFO L226 Difference]: Without dead ends: 5920 [2021-11-07 01:12:44,451 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:12:44,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5920 states. [2021-11-07 01:12:44,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5920 to 5920. [2021-11-07 01:12:44,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5920 states, 5860 states have (on average 1.3906143344709898) internal successors, (8149), 5919 states have internal predecessors, (8149), 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 01:12:44,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5920 states to 5920 states and 8149 transitions. [2021-11-07 01:12:44,974 INFO L78 Accepts]: Start accepts. Automaton has 5920 states and 8149 transitions. Word has length 66 [2021-11-07 01:12:44,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:12:44,975 INFO L470 AbstractCegarLoop]: Abstraction has 5920 states and 8149 transitions. [2021-11-07 01:12:44,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 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 01:12:44,975 INFO L276 IsEmpty]: Start isEmpty. Operand 5920 states and 8149 transitions. [2021-11-07 01:12:44,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 01:12:44,977 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:12:44,977 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:12:45,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:12:45,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:12:45,188 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 59 more)] === [2021-11-07 01:12:45,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:12:45,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1706306275, now seen corresponding path program 1 times [2021-11-07 01:12:45,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:12:45,192 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [466920080] [2021-11-07 01:12:45,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:12:45,192 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:12:45,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:12:45,193 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:12:45,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:12:47,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:12:47,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 1202 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:12:47,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:12:48,945 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 01:12:48,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:12:49,901 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 01:12:49,901 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:12:49,902 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [466920080] [2021-11-07 01:12:49,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [466920080] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:12:49,902 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:12:49,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:12:49,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216294176] [2021-11-07 01:12:49,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:12:49,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:12:49,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:12:49,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:12:49,905 INFO L87 Difference]: Start difference. First operand 5920 states and 8149 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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 01:12:51,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:12:51,430 INFO L93 Difference]: Finished difference Result 11658 states and 16044 transitions. [2021-11-07 01:12:51,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:12:51,430 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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 66 [2021-11-07 01:12:51,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:12:51,440 INFO L225 Difference]: With dead ends: 11658 [2021-11-07 01:12:51,441 INFO L226 Difference]: Without dead ends: 5740 [2021-11-07 01:12:51,450 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:12:51,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5740 states. [2021-11-07 01:12:51,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5740 to 5740. [2021-11-07 01:12:51,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5740 states, 5680 states have (on average 1.3329225352112677) internal successors, (7571), 5739 states have internal predecessors, (7571), 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 01:12:51,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5740 states to 5740 states and 7571 transitions. [2021-11-07 01:12:51,900 INFO L78 Accepts]: Start accepts. Automaton has 5740 states and 7571 transitions. Word has length 66 [2021-11-07 01:12:51,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:12:51,900 INFO L470 AbstractCegarLoop]: Abstraction has 5740 states and 7571 transitions. [2021-11-07 01:12:51,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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 01:12:51,901 INFO L276 IsEmpty]: Start isEmpty. Operand 5740 states and 7571 transitions. [2021-11-07 01:12:51,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 01:12:51,903 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:12:51,903 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:12:51,944 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:12:52,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:12:52,129 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 59 more)] === [2021-11-07 01:12:52,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:12:52,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1629571235, now seen corresponding path program 1 times [2021-11-07 01:12:52,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:12:52,131 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [132162645] [2021-11-07 01:12:52,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:12:52,132 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:12:52,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:12:52,133 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:12:52,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:12:54,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:12:55,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 1202 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:12:55,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:12:56,052 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 01:12:56,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:12:57,039 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 01:12:57,039 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:12:57,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [132162645] [2021-11-07 01:12:57,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [132162645] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:12:57,040 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:12:57,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:12:57,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838053610] [2021-11-07 01:12:57,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:12:57,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:12:57,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:12:57,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:12:57,042 INFO L87 Difference]: Start difference. First operand 5740 states and 7571 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 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 01:12:57,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:12:57,418 INFO L93 Difference]: Finished difference Result 11100 states and 14658 transitions. [2021-11-07 01:12:57,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:12:57,420 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 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 66 [2021-11-07 01:12:57,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:12:57,428 INFO L225 Difference]: With dead ends: 11100 [2021-11-07 01:12:57,428 INFO L226 Difference]: Without dead ends: 5362 [2021-11-07 01:12:57,438 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:12:57,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5362 states. [2021-11-07 01:12:57,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5362 to 5362. [2021-11-07 01:12:57,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5362 states, 5306 states have (on average 1.33377308707124) internal successors, (7077), 5361 states have internal predecessors, (7077), 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 01:12:57,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5362 states to 5362 states and 7077 transitions. [2021-11-07 01:12:57,878 INFO L78 Accepts]: Start accepts. Automaton has 5362 states and 7077 transitions. Word has length 66 [2021-11-07 01:12:57,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:12:57,879 INFO L470 AbstractCegarLoop]: Abstraction has 5362 states and 7077 transitions. [2021-11-07 01:12:57,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 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 01:12:57,879 INFO L276 IsEmpty]: Start isEmpty. Operand 5362 states and 7077 transitions. [2021-11-07 01:12:57,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 01:12:57,882 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:12:57,882 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:12:57,922 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-11-07 01:12:58,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:12:58,105 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 59 more)] === [2021-11-07 01:12:58,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:12:58,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1271548182, now seen corresponding path program 1 times [2021-11-07 01:12:58,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:12:58,108 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1015663714] [2021-11-07 01:12:58,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:12:58,108 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:12:58,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:12:58,110 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:12:58,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:13:00,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:13:00,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 1123 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:13:00,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:13:01,568 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 01:13:01,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:13:02,482 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 01:13:02,483 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:13:02,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1015663714] [2021-11-07 01:13:02,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1015663714] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:13:02,483 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:13:02,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:13:02,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737515469] [2021-11-07 01:13:02,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:13:02,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:13:02,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:13:02,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:13:02,486 INFO L87 Difference]: Start difference. First operand 5362 states and 7077 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 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 01:13:03,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:13:03,009 INFO L93 Difference]: Finished difference Result 10794 states and 14270 transitions. [2021-11-07 01:13:03,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:13:03,010 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 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 77 [2021-11-07 01:13:03,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:13:03,018 INFO L225 Difference]: With dead ends: 10794 [2021-11-07 01:13:03,018 INFO L226 Difference]: Without dead ends: 5434 [2021-11-07 01:13:03,026 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:13:03,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5434 states. [2021-11-07 01:13:03,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5434 to 5434. [2021-11-07 01:13:03,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5434 states, 5378 states have (on average 1.3356266269988843) internal successors, (7183), 5433 states have internal predecessors, (7183), 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 01:13:03,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5434 states to 5434 states and 7183 transitions. [2021-11-07 01:13:03,501 INFO L78 Accepts]: Start accepts. Automaton has 5434 states and 7183 transitions. Word has length 77 [2021-11-07 01:13:03,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:13:03,502 INFO L470 AbstractCegarLoop]: Abstraction has 5434 states and 7183 transitions. [2021-11-07 01:13:03,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 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 01:13:03,502 INFO L276 IsEmpty]: Start isEmpty. Operand 5434 states and 7183 transitions. [2021-11-07 01:13:03,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-07 01:13:03,504 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:13:03,504 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:13:03,541 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:13:03,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:13:03,721 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 59 more)] === [2021-11-07 01:13:03,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:13:03,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1964859801, now seen corresponding path program 1 times [2021-11-07 01:13:03,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:13:03,723 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1606065130] [2021-11-07 01:13:03,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:13:03,723 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:13:03,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:13:03,724 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:13:03,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:13:06,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:13:06,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 1272 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:13:06,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:13:07,465 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 01:13:07,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:13:08,065 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 01:13:08,066 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:13:08,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1606065130] [2021-11-07 01:13:08,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1606065130] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:13:08,066 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:13:08,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:13:08,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615578636] [2021-11-07 01:13:08,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:13:08,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:13:08,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:13:08,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:13:08,068 INFO L87 Difference]: Start difference. First operand 5434 states and 7183 transitions. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 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 01:13:08,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:13:08,722 INFO L93 Difference]: Finished difference Result 14018 states and 18493 transitions. [2021-11-07 01:13:08,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:13:08,722 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-07 01:13:08,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:13:08,738 INFO L225 Difference]: With dead ends: 14018 [2021-11-07 01:13:08,739 INFO L226 Difference]: Without dead ends: 8586 [2021-11-07 01:13:08,749 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 162 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 01:13:08,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8586 states. [2021-11-07 01:13:09,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8586 to 5434. [2021-11-07 01:13:09,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5434 states, 5378 states have (on average 1.3348828560803272) internal successors, (7179), 5433 states have internal predecessors, (7179), 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 01:13:09,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5434 states to 5434 states and 7179 transitions. [2021-11-07 01:13:09,411 INFO L78 Accepts]: Start accepts. Automaton has 5434 states and 7179 transitions. Word has length 83 [2021-11-07 01:13:09,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:13:09,411 INFO L470 AbstractCegarLoop]: Abstraction has 5434 states and 7179 transitions. [2021-11-07 01:13:09,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 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 01:13:09,412 INFO L276 IsEmpty]: Start isEmpty. Operand 5434 states and 7179 transitions. [2021-11-07 01:13:09,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-07 01:13:09,413 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:13:09,413 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:13:09,442 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:13:09,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:13:09,614 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 59 more)] === [2021-11-07 01:13:09,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:13:09,614 INFO L85 PathProgramCache]: Analyzing trace with hash -1071373463, now seen corresponding path program 1 times [2021-11-07 01:13:09,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:13:09,616 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1579531792] [2021-11-07 01:13:09,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:13:09,617 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:13:09,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:13:09,617 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:13:09,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:13:12,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:13:12,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 1272 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:13:12,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:13:13,409 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 01:13:13,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:13:14,093 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 01:13:14,093 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:13:14,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1579531792] [2021-11-07 01:13:14,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1579531792] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:13:14,094 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:13:14,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 01:13:14,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264895635] [2021-11-07 01:13:14,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:13:14,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:13:14,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:13:14,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:13:14,095 INFO L87 Difference]: Start difference. First operand 5434 states and 7179 transitions. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 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 01:13:16,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:13:16,452 INFO L93 Difference]: Finished difference Result 19934 states and 26271 transitions. [2021-11-07 01:13:16,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:13:16,453 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-07 01:13:16,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:13:16,472 INFO L225 Difference]: With dead ends: 19934 [2021-11-07 01:13:16,472 INFO L226 Difference]: Without dead ends: 14502 [2021-11-07 01:13:16,481 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:13:16,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14502 states. [2021-11-07 01:13:17,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14502 to 5446. [2021-11-07 01:13:17,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5446 states, 5390 states have (on average 1.3341372912801484) internal successors, (7191), 5445 states have internal predecessors, (7191), 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 01:13:17,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5446 states to 5446 states and 7191 transitions. [2021-11-07 01:13:17,090 INFO L78 Accepts]: Start accepts. Automaton has 5446 states and 7191 transitions. Word has length 83 [2021-11-07 01:13:17,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:13:17,090 INFO L470 AbstractCegarLoop]: Abstraction has 5446 states and 7191 transitions. [2021-11-07 01:13:17,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 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 01:13:17,090 INFO L276 IsEmpty]: Start isEmpty. Operand 5446 states and 7191 transitions. [2021-11-07 01:13:17,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-07 01:13:17,092 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:13:17,092 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:13:17,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:13:17,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:13:17,300 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 59 more)] === [2021-11-07 01:13:17,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:13:17,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1220376100, now seen corresponding path program 1 times [2021-11-07 01:13:17,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:13:17,303 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [202268891] [2021-11-07 01:13:17,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:13:17,303 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:13:17,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:13:17,304 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:13:17,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:13:20,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:13:20,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 1291 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-07 01:13:20,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:13:21,424 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 01:13:21,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:13:22,255 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 01:13:22,255 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:13:22,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [202268891] [2021-11-07 01:13:22,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [202268891] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:13:22,256 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:13:22,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 01:13:22,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582730818] [2021-11-07 01:13:22,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:13:22,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:13:22,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:13:22,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:13:22,258 INFO L87 Difference]: Start difference. First operand 5446 states and 7191 transitions. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:13:23,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:13:23,743 INFO L93 Difference]: Finished difference Result 14082 states and 18553 transitions. [2021-11-07 01:13:23,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:13:23,745 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2021-11-07 01:13:23,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:13:23,755 INFO L225 Difference]: With dead ends: 14082 [2021-11-07 01:13:23,755 INFO L226 Difference]: Without dead ends: 8638 [2021-11-07 01:13:23,762 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:13:23,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8638 states. [2021-11-07 01:13:24,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8638 to 5458. [2021-11-07 01:13:24,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5458 states, 5402 states have (on average 1.3333950388744908) internal successors, (7203), 5457 states have internal predecessors, (7203), 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 01:13:24,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5458 states to 5458 states and 7203 transitions. [2021-11-07 01:13:24,397 INFO L78 Accepts]: Start accepts. Automaton has 5458 states and 7203 transitions. Word has length 88 [2021-11-07 01:13:24,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:13:24,397 INFO L470 AbstractCegarLoop]: Abstraction has 5458 states and 7203 transitions. [2021-11-07 01:13:24,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:13:24,398 INFO L276 IsEmpty]: Start isEmpty. Operand 5458 states and 7203 transitions. [2021-11-07 01:13:24,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-07 01:13:24,400 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:13:24,400 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:13:24,445 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-11-07 01:13:24,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:13:24,625 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 59 more)] === [2021-11-07 01:13:24,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:13:24,625 INFO L85 PathProgramCache]: Analyzing trace with hash -2129387210, now seen corresponding path program 1 times [2021-11-07 01:13:24,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:13:24,627 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1747317626] [2021-11-07 01:13:24,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:13:24,627 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:13:24,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:13:24,628 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:13:24,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:13:27,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:13:27,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 1188 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:13:27,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:13:28,204 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:13:28,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:13:29,231 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:13:29,231 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:13:29,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1747317626] [2021-11-07 01:13:29,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1747317626] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:13:29,232 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:13:29,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:13:29,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728876822] [2021-11-07 01:13:29,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:13:29,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:13:29,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:13:29,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:13:29,234 INFO L87 Difference]: Start difference. First operand 5458 states and 7203 transitions. Second operand has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 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 01:13:29,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:13:29,993 INFO L93 Difference]: Finished difference Result 10946 states and 14437 transitions. [2021-11-07 01:13:29,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:13:29,993 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 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 94 [2021-11-07 01:13:29,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:13:29,998 INFO L225 Difference]: With dead ends: 10946 [2021-11-07 01:13:29,999 INFO L226 Difference]: Without dead ends: 5482 [2021-11-07 01:13:30,004 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:13:30,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5482 states. [2021-11-07 01:13:30,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5482 to 5462. [2021-11-07 01:13:30,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5462 states, 5406 states have (on average 1.3327783943766185) internal successors, (7205), 5461 states have internal predecessors, (7205), 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 01:13:30,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5462 states to 5462 states and 7205 transitions. [2021-11-07 01:13:30,493 INFO L78 Accepts]: Start accepts. Automaton has 5462 states and 7205 transitions. Word has length 94 [2021-11-07 01:13:30,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:13:30,494 INFO L470 AbstractCegarLoop]: Abstraction has 5462 states and 7205 transitions. [2021-11-07 01:13:30,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 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 01:13:30,494 INFO L276 IsEmpty]: Start isEmpty. Operand 5462 states and 7205 transitions. [2021-11-07 01:13:30,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-07 01:13:30,496 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:13:30,496 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:13:30,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:13:30,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:13:30,713 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 59 more)] === [2021-11-07 01:13:30,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:13:30,713 INFO L85 PathProgramCache]: Analyzing trace with hash -2078336778, now seen corresponding path program 1 times [2021-11-07 01:13:30,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:13:30,716 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [499889941] [2021-11-07 01:13:30,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:13:30,716 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:13:30,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:13:30,718 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:13:30,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:13:33,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:13:33,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 1353 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:13:33,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:13:34,518 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 01:13:34,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:13:37,141 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 01:13:37,141 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:13:37,141 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [499889941] [2021-11-07 01:13:37,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [499889941] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:13:37,142 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:13:37,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:13:37,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141600907] [2021-11-07 01:13:37,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:13:37,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:13:37,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:13:37,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=5, Unknown=1, NotChecked=0, Total=12 [2021-11-07 01:13:37,144 INFO L87 Difference]: Start difference. First operand 5462 states and 7205 transitions. Second operand has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 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 01:13:39,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:13:39,201 INFO L93 Difference]: Finished difference Result 16358 states and 21575 transitions. [2021-11-07 01:13:39,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:13:39,204 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 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 98 [2021-11-07 01:13:39,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:13:39,219 INFO L225 Difference]: With dead ends: 16358 [2021-11-07 01:13:39,219 INFO L226 Difference]: Without dead ends: 10898 [2021-11-07 01:13:39,230 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=6, Invalid=5, Unknown=1, NotChecked=0, Total=12 [2021-11-07 01:13:39,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10898 states. [2021-11-07 01:13:40,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10898 to 5466. [2021-11-07 01:13:40,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5466 states, 5410 states have (on average 1.3325323475046211) internal successors, (7209), 5465 states have internal predecessors, (7209), 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 01:13:40,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5466 states to 5466 states and 7209 transitions. [2021-11-07 01:13:40,135 INFO L78 Accepts]: Start accepts. Automaton has 5466 states and 7209 transitions. Word has length 98 [2021-11-07 01:13:40,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:13:40,136 INFO L470 AbstractCegarLoop]: Abstraction has 5466 states and 7209 transitions. [2021-11-07 01:13:40,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 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 01:13:40,136 INFO L276 IsEmpty]: Start isEmpty. Operand 5466 states and 7209 transitions. [2021-11-07 01:13:40,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-07 01:13:40,137 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:13:40,137 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:13:40,172 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:13:40,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:13:40,338 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 59 more)] === [2021-11-07 01:13:40,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:13:40,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1319237240, now seen corresponding path program 1 times [2021-11-07 01:13:40,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:13:40,341 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [654632328] [2021-11-07 01:13:40,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:13:40,341 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:13:40,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:13:40,342 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:13:40,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 01:13:43,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:13:43,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 1351 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:13:43,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:13:44,194 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 01:13:44,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:13:44,730 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 01:13:44,731 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:13:44,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [654632328] [2021-11-07 01:13:44,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [654632328] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:13:44,731 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:13:44,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:13:44,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153616922] [2021-11-07 01:13:44,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:13:44,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:13:44,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:13:44,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:13:44,732 INFO L87 Difference]: Start difference. First operand 5466 states and 7209 transitions. Second operand has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 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 01:13:45,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:13:45,427 INFO L93 Difference]: Finished difference Result 10938 states and 14432 transitions. [2021-11-07 01:13:45,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:13:45,427 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 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 98 [2021-11-07 01:13:45,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:13:45,433 INFO L225 Difference]: With dead ends: 10938 [2021-11-07 01:13:45,433 INFO L226 Difference]: Without dead ends: 5474 [2021-11-07 01:13:45,440 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 192 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 01:13:45,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5474 states. [2021-11-07 01:13:46,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5474 to 5474. [2021-11-07 01:13:46,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5474 states, 5418 states have (on average 1.3320413436692506) internal successors, (7217), 5473 states have internal predecessors, (7217), 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 01:13:46,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5474 states to 5474 states and 7217 transitions. [2021-11-07 01:13:46,034 INFO L78 Accepts]: Start accepts. Automaton has 5474 states and 7217 transitions. Word has length 98 [2021-11-07 01:13:46,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:13:46,034 INFO L470 AbstractCegarLoop]: Abstraction has 5474 states and 7217 transitions. [2021-11-07 01:13:46,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 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 01:13:46,034 INFO L276 IsEmpty]: Start isEmpty. Operand 5474 states and 7217 transitions. [2021-11-07 01:13:46,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-07 01:13:46,035 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:13:46,036 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:13:46,064 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-11-07 01:13:46,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:13:46,236 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 59 more)] === [2021-11-07 01:13:46,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:13:46,237 INFO L85 PathProgramCache]: Analyzing trace with hash -758081416, now seen corresponding path program 1 times [2021-11-07 01:13:46,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:13:46,240 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1627575520] [2021-11-07 01:13:46,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:13:46,241 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:13:46,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:13:46,242 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:13:46,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:13:49,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:13:49,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 1361 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:13:49,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:13:50,503 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 01:13:50,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:13:51,644 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 01:13:51,645 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:13:51,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1627575520] [2021-11-07 01:13:51,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1627575520] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:13:51,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2038482818] [2021-11-07 01:13:51,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:13:51,645 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:13:51,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:13:51,647 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:13:51,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-07 01:13:53,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:13:53,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 1361 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:13:53,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:13:54,088 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 01:13:54,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:13:54,406 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 01:13:54,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2038482818] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:13:54,406 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:13:54,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-07 01:13:54,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777823279] [2021-11-07 01:13:54,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:13:54,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:13:54,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:13:54,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:13:54,408 INFO L87 Difference]: Start difference. First operand 5474 states and 7217 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 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 01:13:58,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:13:58,416 INFO L93 Difference]: Finished difference Result 11016 states and 14507 transitions. [2021-11-07 01:13:58,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:13:58,416 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 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 100 [2021-11-07 01:13:58,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:13:58,422 INFO L225 Difference]: With dead ends: 11016 [2021-11-07 01:13:58,422 INFO L226 Difference]: Without dead ends: 5544 [2021-11-07 01:13:58,427 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 389 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:13:58,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5544 states. [2021-11-07 01:13:59,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5544 to 5452. [2021-11-07 01:13:59,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5452 states, 5396 states have (on average 1.3170867309117864) internal successors, (7107), 5451 states have internal predecessors, (7107), 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 01:13:59,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5452 states to 5452 states and 7107 transitions. [2021-11-07 01:13:59,038 INFO L78 Accepts]: Start accepts. Automaton has 5452 states and 7107 transitions. Word has length 100 [2021-11-07 01:13:59,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:13:59,039 INFO L470 AbstractCegarLoop]: Abstraction has 5452 states and 7107 transitions. [2021-11-07 01:13:59,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 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 01:13:59,039 INFO L276 IsEmpty]: Start isEmpty. Operand 5452 states and 7107 transitions. [2021-11-07 01:13:59,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-07 01:13:59,040 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:13:59,041 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:13:59,053 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-11-07 01:13:59,272 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:13:59,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:13:59,441 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 59 more)] === [2021-11-07 01:13:59,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:13:59,442 INFO L85 PathProgramCache]: Analyzing trace with hash -57016838, now seen corresponding path program 1 times [2021-11-07 01:13:59,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:13:59,444 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1437248334] [2021-11-07 01:13:59,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:13:59,444 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:13:59,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:13:59,445 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:13:59,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 01:14:02,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:14:02,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 1360 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:14:02,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:14:03,741 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 01:14:03,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:14:04,813 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 01:14:04,813 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:14:04,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1437248334] [2021-11-07 01:14:04,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1437248334] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:14:04,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1601360829] [2021-11-07 01:14:04,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:14:04,813 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:14:04,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:14:04,814 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:14:04,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-07 01:14:06,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:14:06,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 1360 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:14:06,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:14:07,681 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 01:14:07,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:14:08,482 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 01:14:08,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1601360829] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:14:08,482 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:14:08,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 14 [2021-11-07 01:14:08,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583637543] [2021-11-07 01:14:08,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:14:08,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:14:08,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:14:08,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:14:08,484 INFO L87 Difference]: Start difference. First operand 5452 states and 7107 transitions. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 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 01:14:30,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:14:30,341 INFO L93 Difference]: Finished difference Result 13042 states and 17170 transitions. [2021-11-07 01:14:30,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:14:30,342 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 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 100 [2021-11-07 01:14:30,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:14:30,357 INFO L225 Difference]: With dead ends: 13042 [2021-11-07 01:14:30,357 INFO L226 Difference]: Without dead ends: 12734 [2021-11-07 01:14:30,361 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 386 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:14:30,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12734 states. [2021-11-07 01:14:31,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12734 to 5144. [2021-11-07 01:14:31,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5144 states, 5121 states have (on average 1.3083382151923453) internal successors, (6700), 5143 states have internal predecessors, (6700), 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 01:14:31,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5144 states to 5144 states and 6700 transitions. [2021-11-07 01:14:31,058 INFO L78 Accepts]: Start accepts. Automaton has 5144 states and 6700 transitions. Word has length 100 [2021-11-07 01:14:31,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:14:31,058 INFO L470 AbstractCegarLoop]: Abstraction has 5144 states and 6700 transitions. [2021-11-07 01:14:31,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 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 01:14:31,059 INFO L276 IsEmpty]: Start isEmpty. Operand 5144 states and 6700 transitions. [2021-11-07 01:14:31,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-07 01:14:31,062 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:14:31,063 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:14:31,105 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-11-07 01:14:31,297 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-07 01:14:31,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:14:31,485 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr61ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 59 more)] === [2021-11-07 01:14:31,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:14:31,485 INFO L85 PathProgramCache]: Analyzing trace with hash 60827987, now seen corresponding path program 1 times [2021-11-07 01:14:31,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:14:31,487 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2133504114] [2021-11-07 01:14:31,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:14:31,488 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:14:31,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:14:31,489 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:14:31,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-07 01:14:34,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:14:35,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 1466 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:14:35,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:14:36,258 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 01:14:36,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:14:37,706 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 01:14:37,706 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:14:37,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2133504114] [2021-11-07 01:14:37,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2133504114] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:14:37,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1230041934] [2021-11-07 01:14:37,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:14:37,707 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:14:37,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:14:37,708 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:14:37,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-07 01:14:39,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:14:40,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 1466 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:14:40,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:14:41,086 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 01:14:41,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:14:41,714 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 01:14:41,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1230041934] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:14:41,714 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:14:41,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 11 [2021-11-07 01:14:41,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732661496] [2021-11-07 01:14:41,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:14:41,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:14:41,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:14:41,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:14:41,716 INFO L87 Difference]: Start difference. First operand 5144 states and 6700 transitions. Second operand has 5 states, 5 states have (on average 26.4) internal successors, (132), 5 states have internal predecessors, (132), 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 01:14:51,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:14:51,978 INFO L93 Difference]: Finished difference Result 9160 states and 11979 transitions. [2021-11-07 01:14:51,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:14:51,979 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.4) internal successors, (132), 5 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 133 [2021-11-07 01:14:51,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:14:51,986 INFO L225 Difference]: With dead ends: 9160 [2021-11-07 01:14:51,987 INFO L226 Difference]: Without dead ends: 7009 [2021-11-07 01:14:51,990 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 532 GetRequests, 521 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:14:51,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7009 states. [2021-11-07 01:14:52,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7009 to 3063. [2021-11-07 01:14:52,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3063 states, 3052 states have (on average 1.2961992136304064) internal successors, (3956), 3062 states have internal predecessors, (3956), 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 01:14:52,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3063 states to 3063 states and 3956 transitions. [2021-11-07 01:14:52,488 INFO L78 Accepts]: Start accepts. Automaton has 3063 states and 3956 transitions. Word has length 133 [2021-11-07 01:14:52,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:14:52,489 INFO L470 AbstractCegarLoop]: Abstraction has 3063 states and 3956 transitions. [2021-11-07 01:14:52,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.4) internal successors, (132), 5 states have internal predecessors, (132), 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 01:14:52,489 INFO L276 IsEmpty]: Start isEmpty. Operand 3063 states and 3956 transitions. [2021-11-07 01:14:52,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-07 01:14:52,492 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:14:52,492 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:14:52,505 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-11-07 01:14:52,729 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2021-11-07 01:14:52,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:14:52,897 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 59 more)] === [2021-11-07 01:14:52,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:14:52,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1986029802, now seen corresponding path program 1 times [2021-11-07 01:14:52,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:14:52,900 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1121714893] [2021-11-07 01:14:52,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:14:52,900 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:14:52,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:14:52,901 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:14:52,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-07 01:14:56,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:14:56,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 1438 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:14:56,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:14:57,367 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:14:57,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:14:58,082 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:14:58,083 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:14:58,083 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1121714893] [2021-11-07 01:14:58,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1121714893] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:14:58,083 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:14:58,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:14:58,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218772717] [2021-11-07 01:14:58,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:14:58,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:14:58,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:14:58,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:14:58,086 INFO L87 Difference]: Start difference. First operand 3063 states and 3956 transitions. Second operand has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 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 01:14:58,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:14:58,736 INFO L93 Difference]: Finished difference Result 6140 states and 7934 transitions. [2021-11-07 01:14:58,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:14:58,737 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 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 136 [2021-11-07 01:14:58,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:14:58,740 INFO L225 Difference]: With dead ends: 6140 [2021-11-07 01:14:58,740 INFO L226 Difference]: Without dead ends: 3079 [2021-11-07 01:14:58,743 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:14:58,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3079 states. [2021-11-07 01:14:59,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3079 to 3079. [2021-11-07 01:14:59,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3079 states, 3068 states have (on average 1.2946544980443286) internal successors, (3972), 3078 states have internal predecessors, (3972), 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 01:14:59,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3079 states to 3079 states and 3972 transitions. [2021-11-07 01:14:59,262 INFO L78 Accepts]: Start accepts. Automaton has 3079 states and 3972 transitions. Word has length 136 [2021-11-07 01:14:59,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:14:59,262 INFO L470 AbstractCegarLoop]: Abstraction has 3079 states and 3972 transitions. [2021-11-07 01:14:59,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 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 01:14:59,263 INFO L276 IsEmpty]: Start isEmpty. Operand 3079 states and 3972 transitions. [2021-11-07 01:14:59,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-07 01:14:59,266 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:14:59,267 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 01:14:59,311 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-07 01:14:59,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:14:59,481 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 59 more)] === [2021-11-07 01:14:59,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:14:59,481 INFO L85 PathProgramCache]: Analyzing trace with hash 341298294, now seen corresponding path program 1 times [2021-11-07 01:14:59,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:14:59,483 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1978224892] [2021-11-07 01:14:59,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:14:59,484 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:14:59,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:14:59,485 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:14:59,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-07 01:15:03,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:15:03,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 1454 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:15:03,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:15:04,386 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:15:04,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:15:05,417 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:15:05,417 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:15:05,417 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1978224892] [2021-11-07 01:15:05,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1978224892] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:15:05,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1384764677] [2021-11-07 01:15:05,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:15:05,418 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:15:05,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:15:05,420 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:15:05,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-07 01:15:07,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:15:07,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 1454 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:15:07,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:15:08,544 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:15:08,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:15:08,884 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:15:08,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1384764677] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:15:08,884 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:15:08,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-07 01:15:08,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33213099] [2021-11-07 01:15:08,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:15:08,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:15:08,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:15:08,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:15:08,886 INFO L87 Difference]: Start difference. First operand 3079 states and 3972 transitions. Second operand has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:15:11,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:15:11,896 INFO L93 Difference]: Finished difference Result 6156 states and 7942 transitions. [2021-11-07 01:15:11,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:15:11,897 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 142 [2021-11-07 01:15:11,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:15:11,900 INFO L225 Difference]: With dead ends: 6156 [2021-11-07 01:15:11,900 INFO L226 Difference]: Without dead ends: 3079 [2021-11-07 01:15:11,903 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 564 GetRequests, 557 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:15:11,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3079 states. [2021-11-07 01:15:12,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3079 to 3079. [2021-11-07 01:15:12,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3079 states, 3068 states have (on average 1.2913950456323338) internal successors, (3962), 3078 states have internal predecessors, (3962), 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 01:15:12,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3079 states to 3079 states and 3962 transitions. [2021-11-07 01:15:12,385 INFO L78 Accepts]: Start accepts. Automaton has 3079 states and 3962 transitions. Word has length 142 [2021-11-07 01:15:12,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:15:12,385 INFO L470 AbstractCegarLoop]: Abstraction has 3079 states and 3962 transitions. [2021-11-07 01:15:12,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:15:12,385 INFO L276 IsEmpty]: Start isEmpty. Operand 3079 states and 3962 transitions. [2021-11-07 01:15:12,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-07 01:15:12,389 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:15:12,389 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 01:15:12,430 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2021-11-07 01:15:12,613 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (26)] Ended with exit code 0 [2021-11-07 01:15:12,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:15:12,801 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 59 more)] === [2021-11-07 01:15:12,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:15:12,802 INFO L85 PathProgramCache]: Analyzing trace with hash -468048332, now seen corresponding path program 1 times [2021-11-07 01:15:12,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:15:12,804 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [504685461] [2021-11-07 01:15:12,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:15:12,805 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:15:12,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:15:12,806 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:15:12,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-07 01:15:16,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:15:16,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 1453 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:15:16,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:15:17,897 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:15:17,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:15:18,935 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:15:18,935 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:15:18,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [504685461] [2021-11-07 01:15:18,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [504685461] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:15:18,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1766805057] [2021-11-07 01:15:18,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:15:18,936 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:15:18,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:15:18,937 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:15:18,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-11-07 01:15:21,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:15:21,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 1453 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:15:21,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:15:22,426 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:15:22,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:15:23,232 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:15:23,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1766805057] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:15:23,232 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:15:23,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 14 [2021-11-07 01:15:23,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287834] [2021-11-07 01:15:23,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:15:23,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:15:23,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:15:23,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:15:23,234 INFO L87 Difference]: Start difference. First operand 3079 states and 3962 transitions. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 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 01:15:25,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:15:25,958 INFO L93 Difference]: Finished difference Result 10428 states and 13453 transitions. [2021-11-07 01:15:25,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:15:25,959 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 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 142 [2021-11-07 01:15:25,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:15:25,967 INFO L225 Difference]: With dead ends: 10428 [2021-11-07 01:15:25,968 INFO L226 Difference]: Without dead ends: 10412 [2021-11-07 01:15:25,970 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 570 GetRequests, 555 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-11-07 01:15:25,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10412 states. [2021-11-07 01:15:26,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10412 to 3063. [2021-11-07 01:15:26,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3063 states, 3054 states have (on average 1.2907662082514735) internal successors, (3942), 3062 states have internal predecessors, (3942), 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 01:15:26,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3063 states to 3063 states and 3942 transitions. [2021-11-07 01:15:26,563 INFO L78 Accepts]: Start accepts. Automaton has 3063 states and 3942 transitions. Word has length 142 [2021-11-07 01:15:26,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:15:26,563 INFO L470 AbstractCegarLoop]: Abstraction has 3063 states and 3942 transitions. [2021-11-07 01:15:26,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 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 01:15:26,563 INFO L276 IsEmpty]: Start isEmpty. Operand 3063 states and 3942 transitions. [2021-11-07 01:15:26,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-11-07 01:15:26,568 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:15:26,568 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:15:26,593 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2021-11-07 01:15:26,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-07 01:15:26,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:15:26,985 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr58ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 59 more)] === [2021-11-07 01:15:26,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:15:26,986 INFO L85 PathProgramCache]: Analyzing trace with hash -300472832, now seen corresponding path program 1 times [2021-11-07 01:15:26,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:15:26,988 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1329433654] [2021-11-07 01:15:26,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:15:26,988 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:15:26,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:15:26,991 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:15:26,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-07 01:15:31,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:15:31,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 1531 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:15:31,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:15:32,398 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:15:32,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:15:33,589 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:15:33,589 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:15:33,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1329433654] [2021-11-07 01:15:33,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1329433654] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:15:33,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1449970368] [2021-11-07 01:15:33,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:15:33,590 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:15:33,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:15:33,591 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:15:33,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-11-07 01:15:36,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:15:36,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 1531 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:15:36,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:15:37,774 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:15:37,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:15:38,294 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:15:38,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1449970368] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:15:38,294 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:15:38,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 11 [2021-11-07 01:15:38,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043888351] [2021-11-07 01:15:38,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:15:38,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:15:38,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:15:38,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:15:38,296 INFO L87 Difference]: Start difference. First operand 3063 states and 3942 transitions. Second operand has 5 states, 5 states have (on average 30.6) internal successors, (153), 5 states have internal predecessors, (153), 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 01:15:40,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:15:40,842 INFO L93 Difference]: Finished difference Result 10424 states and 13443 transitions. [2021-11-07 01:15:40,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:15:40,843 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.6) internal successors, (153), 5 states have internal predecessors, (153), 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 159 [2021-11-07 01:15:40,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:15:40,852 INFO L225 Difference]: With dead ends: 10424 [2021-11-07 01:15:40,852 INFO L226 Difference]: Without dead ends: 8956 [2021-11-07 01:15:40,855 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 638 GetRequests, 626 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:15:40,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8956 states. [2021-11-07 01:15:41,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8956 to 3059. [2021-11-07 01:15:41,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3059 states, 3050 states have (on average 1.2904918032786885) internal successors, (3936), 3058 states have internal predecessors, (3936), 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 01:15:41,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3059 states to 3059 states and 3936 transitions. [2021-11-07 01:15:41,467 INFO L78 Accepts]: Start accepts. Automaton has 3059 states and 3936 transitions. Word has length 159 [2021-11-07 01:15:41,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:15:41,467 INFO L470 AbstractCegarLoop]: Abstraction has 3059 states and 3936 transitions. [2021-11-07 01:15:41,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.6) internal successors, (153), 5 states have internal predecessors, (153), 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 01:15:41,467 INFO L276 IsEmpty]: Start isEmpty. Operand 3059 states and 3936 transitions. [2021-11-07 01:15:41,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-07 01:15:41,473 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:15:41,474 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 01:15:41,527 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-07 01:15:41,714 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (30)] Ended with exit code 0 [2021-11-07 01:15:41,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:15:41,901 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr50ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 59 more)] === [2021-11-07 01:15:41,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:15:41,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1203864014, now seen corresponding path program 1 times [2021-11-07 01:15:41,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:15:41,905 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2104866783] [2021-11-07 01:15:41,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:15:41,905 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:15:41,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:15:41,906 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:15:41,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-07 01:15:46,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:15:46,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 1488 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:15:46,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:15:47,627 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:15:47,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:15:48,925 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:15:48,925 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:15:48,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2104866783] [2021-11-07 01:15:48,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2104866783] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:15:48,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1863827183] [2021-11-07 01:15:48,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:15:48,926 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:15:48,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:15:48,926 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:15:48,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2021-11-07 01:15:52,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:15:52,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 1488 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:15:52,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:15:52,795 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:15:52,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:15:53,299 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:15:53,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1863827183] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:15:53,299 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:15:53,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-07 01:15:53,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462925829] [2021-11-07 01:15:53,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:15:53,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:15:53,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:15:53,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:15:53,300 INFO L87 Difference]: Start difference. First operand 3059 states and 3936 transitions. Second operand has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 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 01:15:54,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:15:54,397 INFO L93 Difference]: Finished difference Result 8401 states and 10806 transitions. [2021-11-07 01:15:54,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:15:54,406 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 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 164 [2021-11-07 01:15:54,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:15:54,415 INFO L225 Difference]: With dead ends: 8401 [2021-11-07 01:15:54,415 INFO L226 Difference]: Without dead ends: 5344 [2021-11-07 01:15:54,420 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 652 GetRequests, 645 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:15:54,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5344 states. [2021-11-07 01:15:55,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5344 to 3057. [2021-11-07 01:15:55,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3057 states, 3048 states have (on average 1.29002624671916) internal successors, (3932), 3056 states have internal predecessors, (3932), 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 01:15:55,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3057 states to 3057 states and 3932 transitions. [2021-11-07 01:15:55,073 INFO L78 Accepts]: Start accepts. Automaton has 3057 states and 3932 transitions. Word has length 164 [2021-11-07 01:15:55,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:15:55,073 INFO L470 AbstractCegarLoop]: Abstraction has 3057 states and 3932 transitions. [2021-11-07 01:15:55,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 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 01:15:55,074 INFO L276 IsEmpty]: Start isEmpty. Operand 3057 states and 3932 transitions. [2021-11-07 01:15:55,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-11-07 01:15:55,076 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:15:55,076 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 01:15:55,112 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (31)] Ended with exit code 0 [2021-11-07 01:15:55,291 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2021-11-07 01:15:55,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:15:55,477 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr57ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 59 more)] === [2021-11-07 01:15:55,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:15:55,477 INFO L85 PathProgramCache]: Analyzing trace with hash 673158943, now seen corresponding path program 1 times [2021-11-07 01:15:55,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:15:55,480 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [778523634] [2021-11-07 01:15:55,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:15:55,481 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:15:55,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:15:55,481 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:15:55,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-07 01:16:00,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:16:00,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 1674 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:16:00,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:16:01,757 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:16:01,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:16:03,195 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:16:03,196 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:16:03,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [778523634] [2021-11-07 01:16:03,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [778523634] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:16:03,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1219096355] [2021-11-07 01:16:03,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:16:03,196 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:16:03,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:16:03,197 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:16:03,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2021-11-07 01:16:06,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:16:06,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 1674 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:16:06,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:16:07,917 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:16:07,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:16:08,844 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:16:08,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1219096355] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:16:08,844 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:16:08,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 4] imperfect sequences [5, 5] total 14 [2021-11-07 01:16:08,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196160814] [2021-11-07 01:16:08,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:16:08,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:16:08,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:16:08,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:16:08,846 INFO L87 Difference]: Start difference. First operand 3057 states and 3932 transitions. Second operand has 8 states, 8 states have (on average 22.0) internal successors, (176), 8 states have internal predecessors, (176), 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 01:16:38,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:16:38,598 INFO L93 Difference]: Finished difference Result 24253 states and 31332 transitions. [2021-11-07 01:16:38,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-07 01:16:38,599 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 22.0) internal successors, (176), 8 states have internal predecessors, (176), 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 176 [2021-11-07 01:16:38,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:16:38,621 INFO L225 Difference]: With dead ends: 24253 [2021-11-07 01:16:38,621 INFO L226 Difference]: Without dead ends: 21198 [2021-11-07 01:16:38,627 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 726 GetRequests, 701 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=147, Invalid=555, Unknown=0, NotChecked=0, Total=702 [2021-11-07 01:16:38,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21198 states. [2021-11-07 01:16:39,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21198 to 3061. [2021-11-07 01:16:39,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3061 states, 3052 states have (on average 1.2896461336828309) internal successors, (3936), 3060 states have internal predecessors, (3936), 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 01:16:39,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3061 states to 3061 states and 3936 transitions. [2021-11-07 01:16:39,301 INFO L78 Accepts]: Start accepts. Automaton has 3061 states and 3936 transitions. Word has length 176 [2021-11-07 01:16:39,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:16:39,301 INFO L470 AbstractCegarLoop]: Abstraction has 3061 states and 3936 transitions. [2021-11-07 01:16:39,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 22.0) internal successors, (176), 8 states have internal predecessors, (176), 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 01:16:39,301 INFO L276 IsEmpty]: Start isEmpty. Operand 3061 states and 3936 transitions. [2021-11-07 01:16:39,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-11-07 01:16:39,303 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:16:39,304 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2021-11-07 01:16:39,343 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (33)] Ended with exit code 0 [2021-11-07 01:16:39,518 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (34)] Ended with exit code 0 [2021-11-07 01:16:39,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:16:39,704 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr57ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 59 more)] === [2021-11-07 01:16:39,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:16:39,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1605927533, now seen corresponding path program 1 times [2021-11-07 01:16:39,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:16:39,708 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [169198203] [2021-11-07 01:16:39,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:16:39,708 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:16:39,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:16:39,709 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:16:39,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-07 01:16:44,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:16:44,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 1701 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:16:44,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:16:46,680 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:16:46,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:16:48,873 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:16:48,874 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:16:48,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [169198203] [2021-11-07 01:16:48,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [169198203] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:16:48,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [500196402] [2021-11-07 01:16:48,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:16:48,874 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:16:48,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:16:48,875 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:16:48,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2021-11-07 01:16:52,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:16:52,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 1701 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:16:52,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:16:54,290 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:16:54,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:16:56,604 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:16:56,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [500196402] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:16:56,605 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:16:56,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [5, 5] total 18 [2021-11-07 01:16:56,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192213669] [2021-11-07 01:16:56,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:16:56,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:16:56,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:16:56,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-11-07 01:16:56,606 INFO L87 Difference]: Start difference. First operand 3061 states and 3936 transitions. Second operand has 12 states, 12 states have (on average 15.416666666666666) internal successors, (185), 12 states have internal predecessors, (185), 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 01:18:44,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:18:44,542 INFO L93 Difference]: Finished difference Result 32914 states and 42978 transitions. [2021-11-07 01:18:44,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-07 01:18:44,564 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 15.416666666666666) internal successors, (185), 12 states have internal predecessors, (185), 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 184 [2021-11-07 01:18:44,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:18:44,594 INFO L225 Difference]: With dead ends: 32914 [2021-11-07 01:18:44,595 INFO L226 Difference]: Without dead ends: 29855 [2021-11-07 01:18:44,601 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 765 GetRequests, 728 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=279, Invalid=1203, Unknown=0, NotChecked=0, Total=1482 [2021-11-07 01:18:44,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29855 states. [2021-11-07 01:18:45,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29855 to 3061. [2021-11-07 01:18:45,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3061 states, 3052 states have (on average 1.2896461336828309) internal successors, (3936), 3060 states have internal predecessors, (3936), 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 01:18:45,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3061 states to 3061 states and 3936 transitions. [2021-11-07 01:18:45,420 INFO L78 Accepts]: Start accepts. Automaton has 3061 states and 3936 transitions. Word has length 184 [2021-11-07 01:18:45,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:18:45,420 INFO L470 AbstractCegarLoop]: Abstraction has 3061 states and 3936 transitions. [2021-11-07 01:18:45,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 15.416666666666666) internal successors, (185), 12 states have internal predecessors, (185), 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 01:18:45,421 INFO L276 IsEmpty]: Start isEmpty. Operand 3061 states and 3936 transitions. [2021-11-07 01:18:45,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-11-07 01:18:45,422 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:18:45,423 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:18:45,457 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-11-07 01:18:45,636 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (36)] Forceful destruction successful, exit code 0 [2021-11-07 01:18:45,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:18:45,823 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr50ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 59 more)] === [2021-11-07 01:18:45,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:18:45,824 INFO L85 PathProgramCache]: Analyzing trace with hash 655593503, now seen corresponding path program 1 times [2021-11-07 01:18:45,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:18:45,826 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1353321079] [2021-11-07 01:18:45,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:18:45,826 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:18:45,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:18:45,827 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:18:45,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-11-07 01:18:50,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:18:50,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 1689 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:18:50,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:18:52,446 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:18:52,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:18:54,568 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:18:54,569 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:18:54,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1353321079] [2021-11-07 01:18:54,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1353321079] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:18:54,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [981039056] [2021-11-07 01:18:54,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:18:54,569 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:18:54,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:18:54,570 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:18:54,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2021-11-07 01:18:58,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:18:58,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 1689 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:18:58,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:18:59,659 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:18:59,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:19:00,695 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:19:00,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [981039056] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:19:00,695 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:19:00,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 4] imperfect sequences [5, 5] total 14 [2021-11-07 01:19:00,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652451560] [2021-11-07 01:19:00,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:19:00,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:19:00,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:19:00,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:19:00,697 INFO L87 Difference]: Start difference. First operand 3061 states and 3936 transitions. Second operand has 8 states, 8 states have (on average 23.75) internal successors, (190), 8 states have internal predecessors, (190), 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 01:19:11,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:19:11,451 INFO L93 Difference]: Finished difference Result 21065 states and 27164 transitions. [2021-11-07 01:19:11,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-07 01:19:11,452 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 23.75) internal successors, (190), 8 states have internal predecessors, (190), 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 190 [2021-11-07 01:19:11,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:19:11,468 INFO L225 Difference]: With dead ends: 21065 [2021-11-07 01:19:11,468 INFO L226 Difference]: Without dead ends: 18006 [2021-11-07 01:19:11,472 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 782 GetRequests, 757 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=147, Invalid=555, Unknown=0, NotChecked=0, Total=702 [2021-11-07 01:19:11,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18006 states. [2021-11-07 01:19:12,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18006 to 3065. [2021-11-07 01:19:12,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3065 states, 3056 states have (on average 1.2892670157068062) internal successors, (3940), 3064 states have internal predecessors, (3940), 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 01:19:12,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3065 states to 3065 states and 3940 transitions. [2021-11-07 01:19:12,290 INFO L78 Accepts]: Start accepts. Automaton has 3065 states and 3940 transitions. Word has length 190 [2021-11-07 01:19:12,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:19:12,291 INFO L470 AbstractCegarLoop]: Abstraction has 3065 states and 3940 transitions. [2021-11-07 01:19:12,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 23.75) internal successors, (190), 8 states have internal predecessors, (190), 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 01:19:12,291 INFO L276 IsEmpty]: Start isEmpty. Operand 3065 states and 3940 transitions. [2021-11-07 01:19:12,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2021-11-07 01:19:12,293 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:19:12,293 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:19:12,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (38)] Forceful destruction successful, exit code 0 [2021-11-07 01:19:12,532 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2021-11-07 01:19:12,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:19:12,694 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr50ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 59 more)] === [2021-11-07 01:19:12,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:19:12,695 INFO L85 PathProgramCache]: Analyzing trace with hash -905399151, now seen corresponding path program 1 times [2021-11-07 01:19:12,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:19:12,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [47646687] [2021-11-07 01:19:12,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:19:12,697 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:19:12,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:19:12,698 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:19:12,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-11-07 01:19:17,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:19:17,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 1716 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:19:17,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:19:19,624 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:19:19,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:19:21,866 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:19:21,866 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:19:21,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [47646687] [2021-11-07 01:19:21,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [47646687] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:19:21,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [653669327] [2021-11-07 01:19:21,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:19:21,866 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:19:21,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:19:21,867 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:19:21,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2021-11-07 01:19:25,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:19:25,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 1716 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:19:25,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:19:27,434 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:19:27,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:19:29,649 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:19:29,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [653669327] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:19:29,649 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:19:29,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [5, 5] total 18 [2021-11-07 01:19:29,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98475744] [2021-11-07 01:19:29,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:19:29,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:19:29,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:19:29,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-11-07 01:19:29,651 INFO L87 Difference]: Start difference. First operand 3065 states and 3940 transitions. Second operand has 12 states, 12 states have (on average 16.583333333333332) internal successors, (199), 12 states have internal predecessors, (199), 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 01:20:39,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:20:39,302 INFO L93 Difference]: Finished difference Result 29378 states and 38346 transitions. [2021-11-07 01:20:39,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-07 01:20:39,303 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 16.583333333333332) internal successors, (199), 12 states have internal predecessors, (199), 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 198 [2021-11-07 01:20:39,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:20:39,330 INFO L225 Difference]: With dead ends: 29378 [2021-11-07 01:20:39,330 INFO L226 Difference]: Without dead ends: 26315 [2021-11-07 01:20:39,336 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 821 GetRequests, 784 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=279, Invalid=1203, Unknown=0, NotChecked=0, Total=1482 [2021-11-07 01:20:39,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26315 states. [2021-11-07 01:20:40,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26315 to 3065. [2021-11-07 01:20:40,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3065 states, 3056 states have (on average 1.2892670157068062) internal successors, (3940), 3064 states have internal predecessors, (3940), 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 01:20:40,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3065 states to 3065 states and 3940 transitions. [2021-11-07 01:20:40,271 INFO L78 Accepts]: Start accepts. Automaton has 3065 states and 3940 transitions. Word has length 198 [2021-11-07 01:20:40,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:20:40,272 INFO L470 AbstractCegarLoop]: Abstraction has 3065 states and 3940 transitions. [2021-11-07 01:20:40,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 16.583333333333332) internal successors, (199), 12 states have internal predecessors, (199), 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 01:20:40,272 INFO L276 IsEmpty]: Start isEmpty. Operand 3065 states and 3940 transitions. [2021-11-07 01:20:40,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-11-07 01:20:40,274 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:20:40,274 INFO L513 BasicCegarLoop]: trace histogram [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, 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 01:20:40,288 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (40)] Ended with exit code 0 [2021-11-07 01:20:40,517 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (39)] Ended with exit code 0 [2021-11-07 01:20:40,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:20:40,675 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr57ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 59 more)] === [2021-11-07 01:20:40,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:20:40,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1373532906, now seen corresponding path program 1 times [2021-11-07 01:20:40,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:20:40,678 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1885188906] [2021-11-07 01:20:40,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:20:40,678 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:20:40,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:20:40,679 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:20:40,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-11-07 01:20:45,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:20:45,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 1782 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:20:45,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:20:47,807 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:20:47,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:20:50,079 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:20:50,079 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:20:50,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1885188906] [2021-11-07 01:20:50,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1885188906] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:20:50,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [103956101] [2021-11-07 01:20:50,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:20:50,080 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:20:50,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:20:50,081 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:20:50,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2021-11-07 01:20:54,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:20:54,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 1782 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:20:54,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:20:55,250 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:20:55,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:20:56,472 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:20:56,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [103956101] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:20:56,472 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:20:56,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 14 [2021-11-07 01:20:56,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178452131] [2021-11-07 01:20:56,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:20:56,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:20:56,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:20:56,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:20:56,474 INFO L87 Difference]: Start difference. First operand 3065 states and 3940 transitions. Second operand has 8 states, 8 states have (on average 24.875) internal successors, (199), 8 states have internal predecessors, (199), 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 01:21:01,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:21:01,442 INFO L93 Difference]: Finished difference Result 7441 states and 9585 transitions. [2021-11-07 01:21:01,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:21:01,443 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 24.875) internal successors, (199), 8 states have internal predecessors, (199), 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 201 [2021-11-07 01:21:01,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:21:01,449 INFO L225 Difference]: With dead ends: 7441 [2021-11-07 01:21:01,449 INFO L226 Difference]: Without dead ends: 7397 [2021-11-07 01:21:01,450 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 806 GetRequests, 791 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-11-07 01:21:01,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7397 states. [2021-11-07 01:21:02,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7397 to 3021. [2021-11-07 01:21:02,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3021 states, 3016 states have (on average 1.2884615384615385) internal successors, (3886), 3020 states have internal predecessors, (3886), 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 01:21:02,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3021 states to 3021 states and 3886 transitions. [2021-11-07 01:21:02,283 INFO L78 Accepts]: Start accepts. Automaton has 3021 states and 3886 transitions. Word has length 201 [2021-11-07 01:21:02,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:21:02,283 INFO L470 AbstractCegarLoop]: Abstraction has 3021 states and 3886 transitions. [2021-11-07 01:21:02,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 24.875) internal successors, (199), 8 states have internal predecessors, (199), 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 01:21:02,283 INFO L276 IsEmpty]: Start isEmpty. Operand 3021 states and 3886 transitions. [2021-11-07 01:21:02,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2021-11-07 01:21:02,285 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:21:02,286 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:21:02,329 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2021-11-07 01:21:02,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (42)] Forceful destruction successful, exit code 0 [2021-11-07 01:21:02,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:21:02,686 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr58ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 59 more)] === [2021-11-07 01:21:02,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:21:02,687 INFO L85 PathProgramCache]: Analyzing trace with hash 717784418, now seen corresponding path program 1 times [2021-11-07 01:21:02,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:21:02,689 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [620781035] [2021-11-07 01:21:02,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:21:02,690 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:21:02,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:21:02,690 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:21:02,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-11-07 01:21:07,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:21:07,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 1862 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:21:07,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:21:10,414 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:21:10,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:21:13,092 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:21:13,092 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:21:13,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [620781035] [2021-11-07 01:21:13,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [620781035] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:21:13,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1649334217] [2021-11-07 01:21:13,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:21:13,093 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:21:13,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:21:13,094 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:21:13,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (44)] Waiting until timeout for monitored process [2021-11-07 01:21:17,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:21:17,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 1862 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:21:17,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:21:18,636 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:21:18,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:21:19,298 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 01:21:19,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1649334217] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:21:19,298 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:21:19,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 11 [2021-11-07 01:21:19,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100594800] [2021-11-07 01:21:19,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:21:19,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:21:19,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:21:19,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:21:19,300 INFO L87 Difference]: Start difference. First operand 3021 states and 3886 transitions. Second operand has 5 states, 5 states have (on average 42.4) internal successors, (212), 5 states have internal predecessors, (212), 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 01:21:22,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:21:22,776 INFO L93 Difference]: Finished difference Result 7397 states and 9531 transitions. [2021-11-07 01:21:22,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:21:22,777 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 42.4) internal successors, (212), 5 states have internal predecessors, (212), 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 218 [2021-11-07 01:21:22,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:21:22,780 INFO L225 Difference]: With dead ends: 7397 [2021-11-07 01:21:22,780 INFO L226 Difference]: Without dead ends: 0 [2021-11-07 01:21:22,786 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 874 GetRequests, 862 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:21:22,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-07 01:21:22,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-07 01:21:22,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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 01:21:22,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-07 01:21:22,787 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 218 [2021-11-07 01:21:22,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:21:22,788 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-07 01:21:22,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.4) internal successors, (212), 5 states have internal predecessors, (212), 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 01:21:22,788 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-07 01:21:22,788 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-07 01:21:22,791 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:21:22,792 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:21:22,792 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:21:22,792 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:21:22,793 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:21:22,793 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:21:22,793 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:21:22,794 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:21:22,795 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:21:22,795 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:21:22,795 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:21:22,795 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:21:22,796 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:21:22,796 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr13ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:21:22,796 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr14ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:21:22,796 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr15ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:21:22,796 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr16ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:21:22,799 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr17ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:21:22,799 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr18ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:21:22,799 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr19ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:21:22,800 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr20ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:21:22,800 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr21ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:21:22,800 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr22ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:21:22,800 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr23ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:21:22,800 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr24ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:21:22,801 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr25ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:21:22,801 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr26ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:21:22,801 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr27ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:21:22,801 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr28ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:21:22,801 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr29ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:21:22,802 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr30ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:21:22,802 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr31ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:21:22,802 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr32ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:21:22,802 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr33ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:21:22,802 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr34ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:21:22,802 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr35ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:21:22,803 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr36ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:21:22,803 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr37ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:21:22,803 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr38ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:21:22,803 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr39ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:21:22,803 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr40ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:21:22,804 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr41ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:21:22,804 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr42ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:21:22,804 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr43ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:21:22,804 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr44ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:21:22,804 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr45ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:21:22,804 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr46ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:21:22,805 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr47ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:21:22,805 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr48ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:21:22,805 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr49ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:21:22,805 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr50ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:21:22,805 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr51ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:21:22,807 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr52ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:21:22,807 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr53ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:21:22,807 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr54ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:21:22,807 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr55ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:21:22,807 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr56ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:21:22,808 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr57ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:21:22,808 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr58ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:21:22,808 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr59ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:21:22,808 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr60ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:21:22,808 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr61ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:21:22,828 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (44)] Forceful destruction successful, exit code 0 [2021-11-07 01:21:23,067 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (43)] Ended with exit code 0 [2021-11-07 01:21:23,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37640c46-5585-4128-a448-28a6138bbdfe/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:21:23,224 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-07 01:21:23,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:21:23,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:21:23,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:21:25,249 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:21:25,250 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:21:25,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:21:26,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:21:26,662 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms