./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--esd_usb2.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/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_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--esd_usb2.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/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_8f154776-f235-4043-8c10-1b0d461444af/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 781669661afd0476205c0d0f127c7931dffbaabf4aae46244e576c29ee5a8115 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:13:51,518 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:13:51,520 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:13:51,586 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:13:51,587 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:13:51,591 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:13:51,593 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:13:51,597 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:13:51,600 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:13:51,605 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:13:51,607 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:13:51,609 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:13:51,609 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:13:51,612 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:13:51,615 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:13:51,620 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:13:51,622 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:13:51,623 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:13:51,625 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:13:51,632 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:13:51,634 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:13:51,636 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:13:51,640 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:13:51,641 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:13:51,650 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:13:51,650 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:13:51,651 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:13:51,653 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:13:51,653 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:13:51,655 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:13:51,656 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:13:51,656 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:13:51,659 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:13:51,660 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:13:51,661 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:13:51,662 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:13:51,662 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:13:51,663 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:13:51,663 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:13:51,664 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:13:51,665 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:13:51,666 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-07 02:13:51,710 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:13:51,710 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:13:51,712 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:13:51,712 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:13:51,713 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:13:51,713 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:13:51,713 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 02:13:51,713 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:13:51,720 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:13:51,720 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 02:13:51,722 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 02:13:51,722 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:13:51,722 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 02:13:51,722 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 02:13:51,723 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 02:13:51,723 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:13:51,724 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 02:13:51,724 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:13:51,724 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:13:51,724 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:13:51,725 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:13:51,725 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:13:51,725 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:13:51,725 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:13:51,726 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:13:51,726 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:13:51,726 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:13:51,726 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:13:51,727 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:13:51,729 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:13:51,729 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:13:51,729 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 02:13:51,730 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 02:13:51,730 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:13:51,730 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:13:51,730 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:13:51,730 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_8f154776-f235-4043-8c10-1b0d461444af/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 781669661afd0476205c0d0f127c7931dffbaabf4aae46244e576c29ee5a8115 [2021-11-07 02:13:52,064 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:13:52,102 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:13:52,104 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:13:52,106 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:13:52,107 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:13:52,108 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--esd_usb2.ko-entry_point.cil.out.i [2021-11-07 02:13:52,183 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/data/4c736c2b9/e8cbffad60804d2abcf3fdd694364498/FLAG815f9384c [2021-11-07 02:13:53,125 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:13:53,126 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--esd_usb2.ko-entry_point.cil.out.i [2021-11-07 02:13:53,189 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/data/4c736c2b9/e8cbffad60804d2abcf3fdd694364498/FLAG815f9384c [2021-11-07 02:13:53,586 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/data/4c736c2b9/e8cbffad60804d2abcf3fdd694364498 [2021-11-07 02:13:53,588 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:13:53,590 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:13:53,592 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:13:53,592 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:13:53,595 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:13:53,596 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:13:53" (1/1) ... [2021-11-07 02:13:53,597 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19941dc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:13:53, skipping insertion in model container [2021-11-07 02:13:53,598 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:13:53" (1/1) ... [2021-11-07 02:13:53,605 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:13:53,729 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:13:54,758 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_8f154776-f235-4043-8c10-1b0d461444af/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--esd_usb2.ko-entry_point.cil.out.i[163937,163950] [2021-11-07 02:13:55,107 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 02:13:55,131 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 02:13:55,145 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 02:13:55,425 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:13:55,451 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 02:13:55,451 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7dcf4f07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:13:55, skipping insertion in model container [2021-11-07 02:13:55,451 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:13:55,452 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 02:13:55,454 INFO L168 Benchmark]: Toolchain (without parser) took 1862.97 ms. Allocated memory was 121.6 MB in the beginning and 169.9 MB in the end (delta: 48.2 MB). Free memory was 74.0 MB in the beginning and 119.4 MB in the end (delta: -45.4 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. [2021-11-07 02:13:55,455 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 121.6 MB. Free memory is still 100.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 02:13:55,456 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1860.05 ms. Allocated memory was 121.6 MB in the beginning and 169.9 MB in the end (delta: 48.2 MB). Free memory was 73.8 MB in the beginning and 119.4 MB in the end (delta: -45.6 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. [2021-11-07 02:13:55,457 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 121.6 MB. Free memory is still 100.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 1860.05 ms. Allocated memory was 121.6 MB in the beginning and 169.9 MB in the end (delta: 48.2 MB). Free memory was 73.8 MB in the beginning and 119.4 MB in the end (delta: -45.6 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 5827]: 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_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/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_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--esd_usb2.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/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_8f154776-f235-4043-8c10-1b0d461444af/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 781669661afd0476205c0d0f127c7931dffbaabf4aae46244e576c29ee5a8115 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:13:57,601 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:13:57,605 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:13:57,648 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:13:57,649 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:13:57,654 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:13:57,656 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:13:57,664 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:13:57,668 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:13:57,676 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:13:57,677 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:13:57,679 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:13:57,680 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:13:57,683 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:13:57,685 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:13:57,690 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:13:57,692 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:13:57,693 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:13:57,695 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:13:57,703 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:13:57,705 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:13:57,707 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:13:57,710 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:13:57,712 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:13:57,721 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:13:57,722 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:13:57,722 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:13:57,724 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:13:57,725 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:13:57,726 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:13:57,727 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:13:57,728 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:13:57,730 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:13:57,731 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:13:57,732 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:13:57,732 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:13:57,742 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:13:57,742 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:13:57,742 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:13:57,745 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:13:57,746 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:13:57,749 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-07 02:13:57,800 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:13:57,801 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:13:57,802 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:13:57,802 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:13:57,803 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:13:57,803 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:13:57,803 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:13:57,803 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:13:57,804 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:13:57,805 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:13:57,806 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:13:57,806 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:13:57,807 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:13:57,807 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:13:57,807 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:13:57,807 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 02:13:57,808 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 02:13:57,808 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:13:57,808 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:13:57,808 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:13:57,809 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:13:57,809 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 02:13:57,809 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:13:57,809 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:13:57,810 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:13:57,810 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:13:57,810 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:13:57,810 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 02:13:57,811 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 02:13:57,811 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:13:57,811 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:13:57,811 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:13:57,811 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_8f154776-f235-4043-8c10-1b0d461444af/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 781669661afd0476205c0d0f127c7931dffbaabf4aae46244e576c29ee5a8115 [2021-11-07 02:13:58,198 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:13:58,231 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:13:58,234 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:13:58,235 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:13:58,236 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:13:58,237 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--esd_usb2.ko-entry_point.cil.out.i [2021-11-07 02:13:58,307 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/data/41cb7f54d/ba86fdd8f2734b44a3eec2fecf3facd0/FLAG6024cc0a5 [2021-11-07 02:13:59,176 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:13:59,178 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--esd_usb2.ko-entry_point.cil.out.i [2021-11-07 02:13:59,225 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/data/41cb7f54d/ba86fdd8f2734b44a3eec2fecf3facd0/FLAG6024cc0a5 [2021-11-07 02:13:59,676 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/data/41cb7f54d/ba86fdd8f2734b44a3eec2fecf3facd0 [2021-11-07 02:13:59,679 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:13:59,680 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:13:59,681 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:13:59,682 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:13:59,686 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:13:59,687 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:13:59" (1/1) ... [2021-11-07 02:13:59,688 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5de2e148 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:13:59, skipping insertion in model container [2021-11-07 02:13:59,688 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:13:59" (1/1) ... [2021-11-07 02:13:59,695 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:13:59,853 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:14:00,863 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_8f154776-f235-4043-8c10-1b0d461444af/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--esd_usb2.ko-entry_point.cil.out.i[163937,163950] [2021-11-07 02:14:01,405 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:14:01,442 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 02:14:01,529 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:14:01,670 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_8f154776-f235-4043-8c10-1b0d461444af/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--esd_usb2.ko-entry_point.cil.out.i[163937,163950] [2021-11-07 02:14:01,776 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:14:01,831 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 02:14:02,048 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_8f154776-f235-4043-8c10-1b0d461444af/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--esd_usb2.ko-entry_point.cil.out.i[163937,163950] [2021-11-07 02:14:02,335 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:14:02,432 INFO L208 MainTranslator]: Completed translation [2021-11-07 02:14:02,433 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:14:02 WrapperNode [2021-11-07 02:14:02,433 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:14:02,434 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 02:14:02,434 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 02:14:02,434 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 02:14:02,442 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:14:02" (1/1) ... [2021-11-07 02:14:02,529 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:14:02" (1/1) ... [2021-11-07 02:14:02,731 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 02:14:02,732 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 02:14:02,732 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 02:14:02,732 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 02:14:02,746 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:14:02" (1/1) ... [2021-11-07 02:14:02,746 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:14:02" (1/1) ... [2021-11-07 02:14:02,785 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:14:02" (1/1) ... [2021-11-07 02:14:02,793 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:14:02" (1/1) ... [2021-11-07 02:14:02,925 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:14:02" (1/1) ... [2021-11-07 02:14:02,950 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:14:02" (1/1) ... [2021-11-07 02:14:02,963 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:14:02" (1/1) ... [2021-11-07 02:14:02,990 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 02:14:02,991 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 02:14:02,991 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 02:14:02,991 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 02:14:02,992 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:14:02" (1/1) ... [2021-11-07 02:14:02,999 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:14:03,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:14:03,024 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 02:14:03,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 02:14:03,070 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-07 02:14:03,070 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_3 [2021-11-07 02:14:03,071 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_3 [2021-11-07 02:14:03,071 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-07 02:14:03,071 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-07 02:14:03,071 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-07 02:14:03,071 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_submit_urb [2021-11-07 02:14:03,071 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_submit_urb [2021-11-07 02:14:03,071 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 02:14:03,072 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 02:14:03,072 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 02:14:03,072 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-07 02:14:03,072 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-07 02:14:03,072 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 02:14:03,072 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-07 02:14:03,072 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-07 02:14:03,072 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-07 02:14:03,073 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 02:14:03,073 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-07 02:14:03,073 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-07 02:14:03,073 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2021-11-07 02:14:03,073 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 02:14:03,073 INFO L130 BoogieDeclarations]: Found specification of procedure esd_usb2_read_bulk_callback [2021-11-07 02:14:03,073 INFO L138 BoogieDeclarations]: Found implementation of procedure esd_usb2_read_bulk_callback [2021-11-07 02:14:03,073 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-07 02:14:03,074 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-07 02:14:03,074 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 02:14:03,074 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 02:14:28,915 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 02:14:28,915 INFO L299 CfgBuilder]: Removed 577 assume(true) statements. [2021-11-07 02:14:28,918 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:14:28 BoogieIcfgContainer [2021-11-07 02:14:28,918 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 02:14:28,920 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 02:14:28,920 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 02:14:28,923 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 02:14:28,924 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:13:59" (1/3) ... [2021-11-07 02:14:28,924 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d4bbe60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:14:28, skipping insertion in model container [2021-11-07 02:14:28,924 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:14:02" (2/3) ... [2021-11-07 02:14:28,925 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d4bbe60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:14:28, skipping insertion in model container [2021-11-07 02:14:28,925 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:14:28" (3/3) ... [2021-11-07 02:14:28,926 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--esd_usb2.ko-entry_point.cil.out.i [2021-11-07 02:14:28,932 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 02:14:28,932 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-11-07 02:14:28,986 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 02:14:28,993 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 02:14:28,993 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-11-07 02:14:29,033 INFO L276 IsEmpty]: Start isEmpty. Operand has 598 states, 581 states have (on average 1.4113597246127367) internal successors, (820), 587 states have internal predecessors, (820), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-07 02:14:29,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-07 02:14:29,042 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:14:29,043 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:14:29,043 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:14:29,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:14:29,050 INFO L85 PathProgramCache]: Analyzing trace with hash -443169162, now seen corresponding path program 1 times [2021-11-07 02:14:29,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:14:29,067 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1213526201] [2021-11-07 02:14:29,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:14:29,068 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:14:29,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:14:29,072 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:14:29,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 02:14:30,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:14:30,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 776 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:14:30,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:14:30,431 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 02:14:30,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:14:30,595 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 02:14:30,595 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:14:30,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1213526201] [2021-11-07 02:14:30,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1213526201] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:14:30,596 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:14:30,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:14:30,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749944978] [2021-11-07 02:14:30,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:14:30,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:14:30,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:14:30,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:14:30,624 INFO L87 Difference]: Start difference. First operand has 598 states, 581 states have (on average 1.4113597246127367) internal successors, (820), 587 states have internal predecessors, (820), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 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 02:14:33,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:14:33,123 INFO L93 Difference]: Finished difference Result 2196 states and 3096 transitions. [2021-11-07 02:14:33,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:14:33,125 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-07 02:14:33,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:14:33,150 INFO L225 Difference]: With dead ends: 2196 [2021-11-07 02:14:33,150 INFO L226 Difference]: Without dead ends: 1572 [2021-11-07 02:14:33,158 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:14:33,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1572 states. [2021-11-07 02:14:33,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1572 to 1572. [2021-11-07 02:14:33,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1572 states, 1534 states have (on average 1.36245110821382) internal successors, (2090), 1541 states have internal predecessors, (2090), 21 states have call successors, (21), 12 states have call predecessors, (21), 12 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-11-07 02:14:33,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1572 states to 1572 states and 2132 transitions. [2021-11-07 02:14:33,309 INFO L78 Accepts]: Start accepts. Automaton has 1572 states and 2132 transitions. Word has length 36 [2021-11-07 02:14:33,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:14:33,310 INFO L470 AbstractCegarLoop]: Abstraction has 1572 states and 2132 transitions. [2021-11-07 02:14:33,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 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 02:14:33,311 INFO L276 IsEmpty]: Start isEmpty. Operand 1572 states and 2132 transitions. [2021-11-07 02:14:33,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-07 02:14:33,314 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:14:33,314 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:14:33,341 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-07 02:14:33,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:14:33,538 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:14:33,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:14:33,539 INFO L85 PathProgramCache]: Analyzing trace with hash 71303661, now seen corresponding path program 1 times [2021-11-07 02:14:33,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:14:33,542 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1898578764] [2021-11-07 02:14:33,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:14:33,542 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:14:33,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:14:33,544 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:14:33,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 02:14:34,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:14:34,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:14:34,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:14:35,376 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 02:14:35,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:14:35,881 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 02:14:35,882 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:14:35,882 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1898578764] [2021-11-07 02:14:35,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1898578764] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:14:35,882 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:14:35,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-07 02:14:35,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222051993] [2021-11-07 02:14:35,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:14:35,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:14:35,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:14:35,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:14:35,886 INFO L87 Difference]: Start difference. First operand 1572 states and 2132 transitions. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 3 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 02:14:36,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:14:36,425 INFO L93 Difference]: Finished difference Result 4598 states and 6257 transitions. [2021-11-07 02:14:36,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:14:36,427 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 3 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 43 [2021-11-07 02:14:36,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:14:36,454 INFO L225 Difference]: With dead ends: 4598 [2021-11-07 02:14:36,454 INFO L226 Difference]: Without dead ends: 3084 [2021-11-07 02:14:36,462 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:14:36,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3084 states. [2021-11-07 02:14:36,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3084 to 3072. [2021-11-07 02:14:36,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3072 states, 3001 states have (on average 1.3625458180606465) internal successors, (4089), 3011 states have internal predecessors, (4089), 42 states have call successors, (42), 24 states have call predecessors, (42), 24 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2021-11-07 02:14:36,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3072 states to 3072 states and 4173 transitions. [2021-11-07 02:14:36,681 INFO L78 Accepts]: Start accepts. Automaton has 3072 states and 4173 transitions. Word has length 43 [2021-11-07 02:14:36,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:14:36,684 INFO L470 AbstractCegarLoop]: Abstraction has 3072 states and 4173 transitions. [2021-11-07 02:14:36,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 3 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 02:14:36,684 INFO L276 IsEmpty]: Start isEmpty. Operand 3072 states and 4173 transitions. [2021-11-07 02:14:36,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-07 02:14:36,693 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:14:36,694 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] [2021-11-07 02:14:36,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 02:14:36,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:14:36,917 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:14:36,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:14:36,918 INFO L85 PathProgramCache]: Analyzing trace with hash -2084553551, now seen corresponding path program 1 times [2021-11-07 02:14:36,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:14:36,921 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1500461553] [2021-11-07 02:14:36,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:14:36,921 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:14:36,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:14:36,922 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:14:36,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 02:14:37,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:14:37,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 812 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:14:37,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:14:38,599 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 02:14:38,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:14:39,112 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 02:14:39,112 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:14:39,113 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1500461553] [2021-11-07 02:14:39,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1500461553] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:14:39,113 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:14:39,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-07 02:14:39,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095511864] [2021-11-07 02:14:39,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:14:39,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:14:39,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:14:39,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:14:39,116 INFO L87 Difference]: Start difference. First operand 3072 states and 4173 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 3 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 02:14:39,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:14:39,304 INFO L93 Difference]: Finished difference Result 3072 states and 4173 transitions. [2021-11-07 02:14:39,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:14:39,306 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 3 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 44 [2021-11-07 02:14:39,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:14:39,328 INFO L225 Difference]: With dead ends: 3072 [2021-11-07 02:14:39,328 INFO L226 Difference]: Without dead ends: 3070 [2021-11-07 02:14:39,330 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 84 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 02:14:39,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3070 states. [2021-11-07 02:14:39,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3070 to 3070. [2021-11-07 02:14:39,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3070 states, 3000 states have (on average 1.3623333333333334) internal successors, (4087), 3009 states have internal predecessors, (4087), 42 states have call successors, (42), 24 states have call predecessors, (42), 24 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2021-11-07 02:14:39,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3070 states to 3070 states and 4171 transitions. [2021-11-07 02:14:39,523 INFO L78 Accepts]: Start accepts. Automaton has 3070 states and 4171 transitions. Word has length 44 [2021-11-07 02:14:39,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:14:39,526 INFO L470 AbstractCegarLoop]: Abstraction has 3070 states and 4171 transitions. [2021-11-07 02:14:39,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 3 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 02:14:39,526 INFO L276 IsEmpty]: Start isEmpty. Operand 3070 states and 4171 transitions. [2021-11-07 02:14:39,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-07 02:14:39,528 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:14:39,528 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] [2021-11-07 02:14:39,560 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 02:14:39,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:14:39,755 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:14:39,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:14:39,755 INFO L85 PathProgramCache]: Analyzing trace with hash -196650377, now seen corresponding path program 1 times [2021-11-07 02:14:39,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:14:39,758 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2011130241] [2021-11-07 02:14:39,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:14:39,758 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:14:39,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:14:39,760 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:14:39,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 02:14:40,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:14:40,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 813 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:14:40,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:14:41,133 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 02:14:41,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:14:41,409 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 02:14:41,409 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:14:41,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2011130241] [2021-11-07 02:14:41,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2011130241] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:14:41,410 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:14:41,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 02:14:41,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791935612] [2021-11-07 02:14:41,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:14:41,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:14:41,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:14:41,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:14:41,412 INFO L87 Difference]: Start difference. First operand 3070 states and 4171 transitions. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 2 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:14:41,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:14:41,624 INFO L93 Difference]: Finished difference Result 3070 states and 4171 transitions. [2021-11-07 02:14:41,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:14:41,625 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 2 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-07 02:14:41,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:14:41,646 INFO L225 Difference]: With dead ends: 3070 [2021-11-07 02:14:41,647 INFO L226 Difference]: Without dead ends: 3068 [2021-11-07 02:14:41,651 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 87 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 02:14:41,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3068 states. [2021-11-07 02:14:41,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3068 to 3068. [2021-11-07 02:14:41,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3068 states, 2999 states have (on average 1.3621207069023007) internal successors, (4085), 3007 states have internal predecessors, (4085), 42 states have call successors, (42), 24 states have call predecessors, (42), 24 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2021-11-07 02:14:41,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3068 states to 3068 states and 4169 transitions. [2021-11-07 02:14:41,843 INFO L78 Accepts]: Start accepts. Automaton has 3068 states and 4169 transitions. Word has length 45 [2021-11-07 02:14:41,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:14:41,845 INFO L470 AbstractCegarLoop]: Abstraction has 3068 states and 4169 transitions. [2021-11-07 02:14:41,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 2 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:14:41,845 INFO L276 IsEmpty]: Start isEmpty. Operand 3068 states and 4169 transitions. [2021-11-07 02:14:41,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-07 02:14:41,846 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:14:41,849 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] [2021-11-07 02:14:41,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 02:14:42,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:14:42,066 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:14:42,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:14:42,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1801194117, now seen corresponding path program 1 times [2021-11-07 02:14:42,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:14:42,068 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1204630304] [2021-11-07 02:14:42,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:14:42,069 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:14:42,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:14:42,072 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:14:42,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 02:14:43,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:14:43,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 814 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:14:43,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:14:43,414 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 02:14:43,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:14:43,699 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 02:14:43,700 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:14:43,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1204630304] [2021-11-07 02:14:43,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1204630304] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:14:43,700 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:14:43,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 02:14:43,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748600387] [2021-11-07 02:14:43,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:14:43,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:14:43,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:14:43,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:14:43,702 INFO L87 Difference]: Start difference. First operand 3068 states and 4169 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 2 states have internal predecessors, (46), 0 states have call successors, (0), 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 02:14:43,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:14:43,851 INFO L93 Difference]: Finished difference Result 3068 states and 4169 transitions. [2021-11-07 02:14:43,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:14:43,852 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 2 states have internal predecessors, (46), 0 states have call successors, (0), 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 46 [2021-11-07 02:14:43,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:14:43,873 INFO L225 Difference]: With dead ends: 3068 [2021-11-07 02:14:43,873 INFO L226 Difference]: Without dead ends: 3066 [2021-11-07 02:14:43,875 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 89 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 02:14:43,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3066 states. [2021-11-07 02:14:44,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3066 to 3066. [2021-11-07 02:14:44,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3066 states, 2998 states have (on average 1.3619079386257504) internal successors, (4083), 3005 states have internal predecessors, (4083), 42 states have call successors, (42), 24 states have call predecessors, (42), 24 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2021-11-07 02:14:44,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3066 states to 3066 states and 4167 transitions. [2021-11-07 02:14:44,136 INFO L78 Accepts]: Start accepts. Automaton has 3066 states and 4167 transitions. Word has length 46 [2021-11-07 02:14:44,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:14:44,138 INFO L470 AbstractCegarLoop]: Abstraction has 3066 states and 4167 transitions. [2021-11-07 02:14:44,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 2 states have internal predecessors, (46), 0 states have call successors, (0), 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 02:14:44,138 INFO L276 IsEmpty]: Start isEmpty. Operand 3066 states and 4167 transitions. [2021-11-07 02:14:44,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-07 02:14:44,141 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:14:44,141 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] [2021-11-07 02:14:44,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 02:14:44,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:14:44,362 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:14:44,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:14:44,362 INFO L85 PathProgramCache]: Analyzing trace with hash -2442495, now seen corresponding path program 1 times [2021-11-07 02:14:44,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:14:44,364 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1044295739] [2021-11-07 02:14:44,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:14:44,364 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:14:44,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:14:44,366 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:14:44,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 02:14:45,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:14:45,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 815 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:14:45,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:14:45,720 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 02:14:45,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:14:45,989 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 02:14:45,989 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:14:45,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1044295739] [2021-11-07 02:14:45,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1044295739] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:14:45,990 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:14:45,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 02:14:45,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924135238] [2021-11-07 02:14:45,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:14:45,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:14:45,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:14:45,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:14:45,992 INFO L87 Difference]: Start difference. First operand 3066 states and 4167 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 2 states have internal predecessors, (47), 0 states have call successors, (0), 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 02:14:46,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:14:46,133 INFO L93 Difference]: Finished difference Result 3066 states and 4167 transitions. [2021-11-07 02:14:46,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:14:46,134 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 2 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-07 02:14:46,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:14:46,152 INFO L225 Difference]: With dead ends: 3066 [2021-11-07 02:14:46,152 INFO L226 Difference]: Without dead ends: 3057 [2021-11-07 02:14:46,154 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 91 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 02:14:46,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3057 states. [2021-11-07 02:14:46,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3057 to 3057. [2021-11-07 02:14:46,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3057 states, 2990 states have (on average 1.3615384615384616) internal successors, (4071), 2996 states have internal predecessors, (4071), 42 states have call successors, (42), 24 states have call predecessors, (42), 24 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2021-11-07 02:14:46,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3057 states to 3057 states and 4155 transitions. [2021-11-07 02:14:46,444 INFO L78 Accepts]: Start accepts. Automaton has 3057 states and 4155 transitions. Word has length 47 [2021-11-07 02:14:46,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:14:46,444 INFO L470 AbstractCegarLoop]: Abstraction has 3057 states and 4155 transitions. [2021-11-07 02:14:46,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 2 states have internal predecessors, (47), 0 states have call successors, (0), 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 02:14:46,445 INFO L276 IsEmpty]: Start isEmpty. Operand 3057 states and 4155 transitions. [2021-11-07 02:14:46,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 02:14:46,448 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:14:46,449 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] [2021-11-07 02:14:46,481 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 02:14:46,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:14:46,670 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:14:46,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:14:46,670 INFO L85 PathProgramCache]: Analyzing trace with hash -529667920, now seen corresponding path program 1 times [2021-11-07 02:14:46,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:14:46,673 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [693207606] [2021-11-07 02:14:46,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:14:46,673 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:14:46,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:14:46,674 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:14:46,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 02:14:47,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:14:47,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 920 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:14:47,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:14:48,030 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 02:14:48,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:14:48,279 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 02:14:48,279 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:14:48,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [693207606] [2021-11-07 02:14:48,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [693207606] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:14:48,280 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:14:48,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:14:48,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714919646] [2021-11-07 02:14:48,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:14:48,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:14:48,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:14:48,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:14:48,281 INFO L87 Difference]: Start difference. First operand 3057 states and 4155 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 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 02:14:48,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:14:48,702 INFO L93 Difference]: Finished difference Result 6977 states and 9457 transitions. [2021-11-07 02:14:48,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:14:48,703 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 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 72 [2021-11-07 02:14:48,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:14:48,732 INFO L225 Difference]: With dead ends: 6977 [2021-11-07 02:14:48,732 INFO L226 Difference]: Without dead ends: 3978 [2021-11-07 02:14:48,740 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 141 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 02:14:48,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3978 states. [2021-11-07 02:14:49,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3978 to 3824. [2021-11-07 02:14:49,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3824 states, 3757 states have (on average 1.3521426670215597) internal successors, (5080), 3763 states have internal predecessors, (5080), 42 states have call successors, (42), 24 states have call predecessors, (42), 24 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2021-11-07 02:14:49,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3824 states to 3824 states and 5164 transitions. [2021-11-07 02:14:49,075 INFO L78 Accepts]: Start accepts. Automaton has 3824 states and 5164 transitions. Word has length 72 [2021-11-07 02:14:49,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:14:49,076 INFO L470 AbstractCegarLoop]: Abstraction has 3824 states and 5164 transitions. [2021-11-07 02:14:49,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 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 02:14:49,076 INFO L276 IsEmpty]: Start isEmpty. Operand 3824 states and 5164 transitions. [2021-11-07 02:14:49,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-07 02:14:49,079 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:14:49,080 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:14:49,113 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 02:14:49,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:14:49,302 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:14:49,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:14:49,302 INFO L85 PathProgramCache]: Analyzing trace with hash 2065425063, now seen corresponding path program 1 times [2021-11-07 02:14:49,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:14:49,304 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [288798981] [2021-11-07 02:14:49,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:14:49,304 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:14:49,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:14:49,305 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:14:49,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 02:14:50,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:14:50,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 956 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:14:50,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:14:51,009 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:14:51,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:14:51,306 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:14:51,306 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:14:51,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [288798981] [2021-11-07 02:14:51,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [288798981] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:14:51,306 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:14:51,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:14:51,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279953262] [2021-11-07 02:14:51,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:14:51,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:14:51,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:14:51,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:14:51,308 INFO L87 Difference]: Start difference. First operand 3824 states and 5164 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 02:14:54,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:14:54,082 INFO L93 Difference]: Finished difference Result 10530 states and 14281 transitions. [2021-11-07 02:14:54,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:14:54,083 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 84 [2021-11-07 02:14:54,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:14:54,132 INFO L225 Difference]: With dead ends: 10530 [2021-11-07 02:14:54,133 INFO L226 Difference]: Without dead ends: 6764 [2021-11-07 02:14:54,141 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 164 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 02:14:54,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6764 states. [2021-11-07 02:14:54,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6764 to 6754. [2021-11-07 02:14:54,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6754 states, 6633 states have (on average 1.3547414442936832) internal successors, (8986), 6645 states have internal predecessors, (8986), 72 states have call successors, (72), 48 states have call predecessors, (72), 48 states have return successors, (72), 72 states have call predecessors, (72), 72 states have call successors, (72) [2021-11-07 02:14:54,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6754 states to 6754 states and 9130 transitions. [2021-11-07 02:14:54,676 INFO L78 Accepts]: Start accepts. Automaton has 6754 states and 9130 transitions. Word has length 84 [2021-11-07 02:14:54,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:14:54,677 INFO L470 AbstractCegarLoop]: Abstraction has 6754 states and 9130 transitions. [2021-11-07 02:14:54,677 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 02:14:54,678 INFO L276 IsEmpty]: Start isEmpty. Operand 6754 states and 9130 transitions. [2021-11-07 02:14:54,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-07 02:14:54,695 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:14:54,695 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:14:54,731 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 02:14:54,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:14:54,896 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:14:54,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:14:54,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1363892421, now seen corresponding path program 1 times [2021-11-07 02:14:54,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:14:54,898 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [401167727] [2021-11-07 02:14:54,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:14:54,898 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:14:54,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:14:54,899 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:14:54,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 02:14:56,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:14:56,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 1025 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:14:56,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:14:56,399 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 02:14:56,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:14:56,683 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 02:14:56,683 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:14:56,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [401167727] [2021-11-07 02:14:56,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [401167727] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:14:56,684 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:14:56,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 02:14:56,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214440351] [2021-11-07 02:14:56,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:14:56,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:14:56,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:14:56,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:14:56,685 INFO L87 Difference]: Start difference. First operand 6754 states and 9130 transitions. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 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 02:14:59,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:14:59,741 INFO L93 Difference]: Finished difference Result 20366 states and 27454 transitions. [2021-11-07 02:14:59,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:14:59,742 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 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 113 [2021-11-07 02:14:59,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:14:59,863 INFO L225 Difference]: With dead ends: 20366 [2021-11-07 02:14:59,863 INFO L226 Difference]: Without dead ends: 13670 [2021-11-07 02:14:59,876 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:14:59,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13670 states. [2021-11-07 02:15:00,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13670 to 6766. [2021-11-07 02:15:00,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6766 states, 6645 states have (on average 1.3541008276899924) internal successors, (8998), 6657 states have internal predecessors, (8998), 72 states have call successors, (72), 48 states have call predecessors, (72), 48 states have return successors, (72), 72 states have call predecessors, (72), 72 states have call successors, (72) [2021-11-07 02:15:00,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6766 states to 6766 states and 9142 transitions. [2021-11-07 02:15:00,479 INFO L78 Accepts]: Start accepts. Automaton has 6766 states and 9142 transitions. Word has length 113 [2021-11-07 02:15:00,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:15:00,480 INFO L470 AbstractCegarLoop]: Abstraction has 6766 states and 9142 transitions. [2021-11-07 02:15:00,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 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 02:15:00,480 INFO L276 IsEmpty]: Start isEmpty. Operand 6766 states and 9142 transitions. [2021-11-07 02:15:00,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-07 02:15:00,489 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:15:00,489 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:15:00,526 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 02:15:00,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:15:00,703 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:15:00,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:15:00,704 INFO L85 PathProgramCache]: Analyzing trace with hash -866447008, now seen corresponding path program 1 times [2021-11-07 02:15:00,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:15:00,705 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2068556658] [2021-11-07 02:15:00,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:15:00,705 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:15:00,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:15:00,707 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:15:00,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 02:15:01,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:15:02,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 1076 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-07 02:15:02,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:15:02,480 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-07 02:15:02,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:15:02,972 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-07 02:15:02,972 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:15:02,972 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2068556658] [2021-11-07 02:15:02,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2068556658] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:15:02,973 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:15:02,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2021-11-07 02:15:02,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341902517] [2021-11-07 02:15:02,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 02:15:02,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:15:02,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 02:15:02,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:15:02,974 INFO L87 Difference]: Start difference. First operand 6766 states and 9142 transitions. Second operand has 10 states, 10 states have (on average 11.0) internal successors, (110), 10 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:15:07,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:15:07,962 INFO L93 Difference]: Finished difference Result 55618 states and 74794 transitions. [2021-11-07 02:15:07,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-07 02:15:07,963 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 11.0) internal successors, (110), 10 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2021-11-07 02:15:07,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:15:08,114 INFO L225 Difference]: With dead ends: 55618 [2021-11-07 02:15:08,114 INFO L226 Difference]: Without dead ends: 48910 [2021-11-07 02:15:08,138 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2021-11-07 02:15:08,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48910 states. [2021-11-07 02:15:09,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48910 to 6790. [2021-11-07 02:15:09,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6790 states, 6669 states have (on average 1.3528265107212476) internal successors, (9022), 6681 states have internal predecessors, (9022), 72 states have call successors, (72), 48 states have call predecessors, (72), 48 states have return successors, (72), 72 states have call predecessors, (72), 72 states have call successors, (72) [2021-11-07 02:15:09,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6790 states to 6790 states and 9166 transitions. [2021-11-07 02:15:09,497 INFO L78 Accepts]: Start accepts. Automaton has 6790 states and 9166 transitions. Word has length 116 [2021-11-07 02:15:09,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:15:09,497 INFO L470 AbstractCegarLoop]: Abstraction has 6790 states and 9166 transitions. [2021-11-07 02:15:09,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.0) internal successors, (110), 10 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:15:09,498 INFO L276 IsEmpty]: Start isEmpty. Operand 6790 states and 9166 transitions. [2021-11-07 02:15:09,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-07 02:15:09,506 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:15:09,506 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:15:09,541 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 02:15:09,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:15:09,722 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:15:09,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:15:09,722 INFO L85 PathProgramCache]: Analyzing trace with hash 883013604, now seen corresponding path program 1 times [2021-11-07 02:15:09,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:15:09,724 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1570342729] [2021-11-07 02:15:09,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:15:09,724 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:15:09,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:15:09,726 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:15:09,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 02:15:11,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:15:11,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 1087 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:15:11,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:15:11,614 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-07 02:15:11,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:15:11,908 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-07 02:15:11,908 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:15:11,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1570342729] [2021-11-07 02:15:11,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1570342729] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:15:11,909 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:15:11,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:15:11,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752599582] [2021-11-07 02:15:11,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:15:11,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:15:11,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:15:11,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:15:11,911 INFO L87 Difference]: Start difference. First operand 6790 states and 9166 transitions. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 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 02:15:12,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:15:12,627 INFO L93 Difference]: Finished difference Result 13540 states and 18293 transitions. [2021-11-07 02:15:12,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:15:12,631 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 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 118 [2021-11-07 02:15:12,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:15:12,655 INFO L225 Difference]: With dead ends: 13540 [2021-11-07 02:15:12,656 INFO L226 Difference]: Without dead ends: 6808 [2021-11-07 02:15:12,667 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 232 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 02:15:12,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6808 states. [2021-11-07 02:15:13,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6808 to 6808. [2021-11-07 02:15:13,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6808 states, 6687 states have (on average 1.3518767758337071) internal successors, (9040), 6699 states have internal predecessors, (9040), 72 states have call successors, (72), 48 states have call predecessors, (72), 48 states have return successors, (72), 72 states have call predecessors, (72), 72 states have call successors, (72) [2021-11-07 02:15:13,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6808 states to 6808 states and 9184 transitions. [2021-11-07 02:15:13,492 INFO L78 Accepts]: Start accepts. Automaton has 6808 states and 9184 transitions. Word has length 118 [2021-11-07 02:15:13,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:15:13,492 INFO L470 AbstractCegarLoop]: Abstraction has 6808 states and 9184 transitions. [2021-11-07 02:15:13,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 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 02:15:13,492 INFO L276 IsEmpty]: Start isEmpty. Operand 6808 states and 9184 transitions. [2021-11-07 02:15:13,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-07 02:15:13,501 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:15:13,502 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:15:13,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 02:15:13,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:15:13,719 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:15:13,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:15:13,720 INFO L85 PathProgramCache]: Analyzing trace with hash -820925924, now seen corresponding path program 1 times [2021-11-07 02:15:13,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:15:13,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1987672347] [2021-11-07 02:15:13,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:15:13,722 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:15:13,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:15:13,723 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:15:13,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 02:15:15,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:15:15,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 1097 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:15:15,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:15:15,546 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-07 02:15:15,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:15:15,904 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-07 02:15:15,904 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:15:15,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1987672347] [2021-11-07 02:15:15,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1987672347] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:15:15,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1269372526] [2021-11-07 02:15:15,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:15:15,905 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:15:15,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:15:15,911 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:15:15,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-07 02:15:17,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:15:17,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 1097 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:15:17,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:15:17,669 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 02:15:17,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:15:18,025 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 02:15:18,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1269372526] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:15:18,026 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:15:18,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 14 [2021-11-07 02:15:18,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563763240] [2021-11-07 02:15:18,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:15:18,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:15:18,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:15:18,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-11-07 02:15:18,028 INFO L87 Difference]: Start difference. First operand 6808 states and 9184 transitions. Second operand has 8 states, 8 states have (on average 14.25) internal successors, (114), 8 states have internal predecessors, (114), 0 states have call successors, (0), 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 02:15:27,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:15:27,443 INFO L93 Difference]: Finished difference Result 77068 states and 103021 transitions. [2021-11-07 02:15:27,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-07 02:15:27,444 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 14.25) internal successors, (114), 8 states have internal predecessors, (114), 0 states have call successors, (0), 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 122 [2021-11-07 02:15:27,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:15:27,632 INFO L225 Difference]: With dead ends: 77068 [2021-11-07 02:15:27,632 INFO L226 Difference]: Without dead ends: 70318 [2021-11-07 02:15:27,657 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 509 GetRequests, 484 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=157, Invalid=545, Unknown=0, NotChecked=0, Total=702 [2021-11-07 02:15:27,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70318 states. [2021-11-07 02:15:29,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70318 to 6898. [2021-11-07 02:15:29,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6898 states, 6777 states have (on average 1.3516305149771286) internal successors, (9160), 6789 states have internal predecessors, (9160), 72 states have call successors, (72), 48 states have call predecessors, (72), 48 states have return successors, (72), 72 states have call predecessors, (72), 72 states have call successors, (72) [2021-11-07 02:15:29,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6898 states to 6898 states and 9304 transitions. [2021-11-07 02:15:29,222 INFO L78 Accepts]: Start accepts. Automaton has 6898 states and 9304 transitions. Word has length 122 [2021-11-07 02:15:29,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:15:29,222 INFO L470 AbstractCegarLoop]: Abstraction has 6898 states and 9304 transitions. [2021-11-07 02:15:29,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.25) internal successors, (114), 8 states have internal predecessors, (114), 0 states have call successors, (0), 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 02:15:29,222 INFO L276 IsEmpty]: Start isEmpty. Operand 6898 states and 9304 transitions. [2021-11-07 02:15:29,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-07 02:15:29,230 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:15:29,230 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:15:29,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-07 02:15:29,466 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-11-07 02:15:29,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:15:29,641 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:15:29,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:15:29,641 INFO L85 PathProgramCache]: Analyzing trace with hash -2047398599, now seen corresponding path program 1 times [2021-11-07 02:15:29,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:15:29,643 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [627486267] [2021-11-07 02:15:29,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:15:29,643 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:15:29,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:15:29,645 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:15:29,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 02:15:31,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:15:31,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 1093 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:15:31,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:15:31,794 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-07 02:15:31,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:15:32,131 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-07 02:15:32,132 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:15:32,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [627486267] [2021-11-07 02:15:32,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [627486267] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:15:32,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1635330629] [2021-11-07 02:15:32,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:15:32,133 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:15:32,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:15:32,133 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:15:32,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-07 02:15:33,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:15:33,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 1093 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:15:33,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:15:34,067 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 02:15:34,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:15:34,660 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 02:15:34,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1635330629] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:15:34,660 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:15:34,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [5, 5] total 22 [2021-11-07 02:15:34,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321457231] [2021-11-07 02:15:34,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 02:15:34,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:15:34,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 02:15:34,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-11-07 02:15:34,663 INFO L87 Difference]: Start difference. First operand 6898 states and 9304 transitions. Second operand has 16 states, 16 states have (on average 7.625) internal successors, (122), 16 states have internal predecessors, (122), 0 states have call successors, (0), 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 02:16:02,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:16:02,012 INFO L93 Difference]: Finished difference Result 87634 states and 116599 transitions. [2021-11-07 02:16:02,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 156 states. [2021-11-07 02:16:02,013 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 7.625) internal successors, (122), 16 states have internal predecessors, (122), 0 states have call successors, (0), 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 122 [2021-11-07 02:16:02,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:16:02,217 INFO L225 Difference]: With dead ends: 87634 [2021-11-07 02:16:02,217 INFO L226 Difference]: Without dead ends: 80794 [2021-11-07 02:16:02,259 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 672 GetRequests, 505 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10046 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=4612, Invalid=23780, Unknown=0, NotChecked=0, Total=28392 [2021-11-07 02:16:02,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80794 states. [2021-11-07 02:16:04,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80794 to 6922. [2021-11-07 02:16:04,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6922 states, 6801 states have (on average 1.3486252021761507) internal successors, (9172), 6813 states have internal predecessors, (9172), 72 states have call successors, (72), 48 states have call predecessors, (72), 48 states have return successors, (72), 72 states have call predecessors, (72), 72 states have call successors, (72) [2021-11-07 02:16:04,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6922 states to 6922 states and 9316 transitions. [2021-11-07 02:16:04,139 INFO L78 Accepts]: Start accepts. Automaton has 6922 states and 9316 transitions. Word has length 122 [2021-11-07 02:16:04,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:16:04,139 INFO L470 AbstractCegarLoop]: Abstraction has 6922 states and 9316 transitions. [2021-11-07 02:16:04,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.625) internal successors, (122), 16 states have internal predecessors, (122), 0 states have call successors, (0), 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 02:16:04,140 INFO L276 IsEmpty]: Start isEmpty. Operand 6922 states and 9316 transitions. [2021-11-07 02:16:04,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-07 02:16:04,146 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:16:04,147 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:16:04,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 02:16:04,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2021-11-07 02:16:04,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:16:04,570 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:16:04,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:16:04,570 INFO L85 PathProgramCache]: Analyzing trace with hash -1789233161, now seen corresponding path program 1 times [2021-11-07 02:16:04,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:16:04,571 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1553023975] [2021-11-07 02:16:04,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:16:04,571 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:16:04,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:16:04,572 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:16:04,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 02:16:06,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:16:06,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 1092 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:16:06,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:16:06,430 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-07 02:16:06,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:16:06,728 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-07 02:16:06,728 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:16:06,729 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1553023975] [2021-11-07 02:16:06,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1553023975] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:16:06,729 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1339527298] [2021-11-07 02:16:06,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:16:06,729 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:16:06,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:16:06,730 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:16:06,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-07 02:16:08,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:16:08,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 1092 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:16:08,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:16:08,579 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 02:16:08,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:16:08,895 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 02:16:08,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1339527298] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:16:08,896 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:16:08,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 12 [2021-11-07 02:16:08,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303457794] [2021-11-07 02:16:08,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:16:08,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:16:08,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:16:08,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-07 02:16:08,898 INFO L87 Difference]: Start difference. First operand 6922 states and 9316 transitions. Second operand has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 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 02:16:15,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:16:15,500 INFO L93 Difference]: Finished difference Result 36682 states and 49042 transitions. [2021-11-07 02:16:15,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:16:15,501 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 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 122 [2021-11-07 02:16:15,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:16:15,559 INFO L225 Difference]: With dead ends: 36682 [2021-11-07 02:16:15,559 INFO L226 Difference]: Without dead ends: 29818 [2021-11-07 02:16:15,577 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 476 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-11-07 02:16:15,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29818 states. [2021-11-07 02:16:17,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29818 to 6970. [2021-11-07 02:16:17,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6970 states, 6849 states have (on average 1.3479340049642283) internal successors, (9232), 6861 states have internal predecessors, (9232), 72 states have call successors, (72), 48 states have call predecessors, (72), 48 states have return successors, (72), 72 states have call predecessors, (72), 72 states have call successors, (72) [2021-11-07 02:16:17,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6970 states to 6970 states and 9376 transitions. [2021-11-07 02:16:17,157 INFO L78 Accepts]: Start accepts. Automaton has 6970 states and 9376 transitions. Word has length 122 [2021-11-07 02:16:17,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:16:17,157 INFO L470 AbstractCegarLoop]: Abstraction has 6970 states and 9376 transitions. [2021-11-07 02:16:17,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 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 02:16:17,157 INFO L276 IsEmpty]: Start isEmpty. Operand 6970 states and 9376 transitions. [2021-11-07 02:16:17,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-07 02:16:17,163 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:16:17,164 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:16:17,177 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-11-07 02:16:17,395 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 02:16:17,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:16:17,574 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:16:17,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:16:17,574 INFO L85 PathProgramCache]: Analyzing trace with hash -219562925, now seen corresponding path program 1 times [2021-11-07 02:16:17,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:16:17,575 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1994300585] [2021-11-07 02:16:17,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:16:17,575 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:16:17,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:16:17,576 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:16:17,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 02:16:19,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:16:19,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 1103 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:16:19,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:16:19,580 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-07 02:16:19,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:16:19,944 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-07 02:16:19,944 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:16:19,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1994300585] [2021-11-07 02:16:19,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1994300585] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:16:19,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1189385538] [2021-11-07 02:16:19,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:16:19,944 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:16:19,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:16:19,945 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:16:19,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-07 02:16:21,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:16:21,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 1103 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:16:21,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:16:22,093 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-07 02:16:22,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:16:22,628 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-07 02:16:22,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1189385538] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:16:22,628 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296119384] [2021-11-07 02:16:22,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:16:22,629 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:16:22,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:16:22,630 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:16:22,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-07 02:16:24,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:16:24,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 1103 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:16:24,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:16:24,676 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-07 02:16:24,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:16:25,213 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-07 02:16:25,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296119384] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:16:25,214 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 02:16:25,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4, 4, 4, 4] total 12 [2021-11-07 02:16:25,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296210743] [2021-11-07 02:16:25,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 02:16:25,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:16:25,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 02:16:25,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-11-07 02:16:25,216 INFO L87 Difference]: Start difference. First operand 6970 states and 9376 transitions. Second operand has 12 states, 12 states have (on average 24.583333333333332) internal successors, (295), 12 states have internal predecessors, (295), 0 states have call successors, (0), 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 02:16:39,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:16:39,814 INFO L93 Difference]: Finished difference Result 48720 states and 65640 transitions. [2021-11-07 02:16:39,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-07 02:16:39,815 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 24.583333333333332) internal successors, (295), 12 states have internal predecessors, (295), 0 states have call successors, (0), 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 124 [2021-11-07 02:16:39,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:16:39,880 INFO L225 Difference]: With dead ends: 48720 [2021-11-07 02:16:39,880 INFO L226 Difference]: Without dead ends: 41808 [2021-11-07 02:16:39,900 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 772 GetRequests, 729 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=483, Invalid=1497, Unknown=0, NotChecked=0, Total=1980 [2021-11-07 02:16:39,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41808 states. [2021-11-07 02:16:47,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41808 to 40723. [2021-11-07 02:16:47,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40723 states, 40002 states have (on average 1.348857557122144) internal successors, (53957), 40074 states have internal predecessors, (53957), 432 states have call successors, (432), 288 states have call predecessors, (432), 288 states have return successors, (432), 432 states have call predecessors, (432), 432 states have call successors, (432) [2021-11-07 02:16:47,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40723 states to 40723 states and 54821 transitions. [2021-11-07 02:16:47,385 INFO L78 Accepts]: Start accepts. Automaton has 40723 states and 54821 transitions. Word has length 124 [2021-11-07 02:16:47,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:16:47,385 INFO L470 AbstractCegarLoop]: Abstraction has 40723 states and 54821 transitions. [2021-11-07 02:16:47,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 24.583333333333332) internal successors, (295), 12 states have internal predecessors, (295), 0 states have call successors, (0), 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 02:16:47,386 INFO L276 IsEmpty]: Start isEmpty. Operand 40723 states and 54821 transitions. [2021-11-07 02:16:47,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-07 02:16:47,412 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:16:47,412 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:16:47,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-11-07 02:16:47,636 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-07 02:16:47,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-07 02:16:48,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:16:48,013 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:16:48,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:16:48,014 INFO L85 PathProgramCache]: Analyzing trace with hash -854894848, now seen corresponding path program 1 times [2021-11-07 02:16:48,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:16:48,015 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1365733826] [2021-11-07 02:16:48,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:16:48,015 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:16:48,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:16:48,016 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:16:48,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-07 02:16:49,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:16:49,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 1158 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:16:49,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:16:50,268 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 24 proven. 36 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-07 02:16:50,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:16:50,806 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 24 proven. 36 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-07 02:16:50,806 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:16:50,806 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1365733826] [2021-11-07 02:16:50,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1365733826] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:16:50,806 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2020158147] [2021-11-07 02:16:50,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:16:50,806 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:16:50,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:16:50,807 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:16:50,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-07 02:16:52,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:16:52,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 1158 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:16:52,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:16:53,308 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-07 02:16:53,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:16:53,827 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-07 02:16:53,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2020158147] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:16:53,827 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:16:53,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [9, 9] total 18 [2021-11-07 02:16:53,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454177945] [2021-11-07 02:16:53,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:16:53,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:16:53,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:16:53,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-11-07 02:16:53,829 INFO L87 Difference]: Start difference. First operand 40723 states and 54821 transitions. Second operand has 4 states, 4 states have (on average 46.75) internal successors, (187), 4 states have internal predecessors, (187), 0 states have call successors, (0), 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 02:16:59,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:16:59,088 INFO L93 Difference]: Finished difference Result 55316 states and 74477 transitions. [2021-11-07 02:16:59,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:16:59,089 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 46.75) internal successors, (187), 4 states have internal predecessors, (187), 0 states have call successors, (0), 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 139 [2021-11-07 02:16:59,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:16:59,108 INFO L225 Difference]: With dead ends: 55316 [2021-11-07 02:16:59,109 INFO L226 Difference]: Without dead ends: 13803 [2021-11-07 02:16:59,136 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 552 GetRequests, 536 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-11-07 02:16:59,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13803 states. [2021-11-07 02:17:01,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13803 to 13803. [2021-11-07 02:17:01,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13803 states, 13562 states have (on average 1.3432384604040701) internal successors, (18217), 13586 states have internal predecessors, (18217), 144 states have call successors, (144), 96 states have call predecessors, (144), 96 states have return successors, (144), 144 states have call predecessors, (144), 144 states have call successors, (144) [2021-11-07 02:17:01,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13803 states to 13803 states and 18505 transitions. [2021-11-07 02:17:01,750 INFO L78 Accepts]: Start accepts. Automaton has 13803 states and 18505 transitions. Word has length 139 [2021-11-07 02:17:01,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:17:01,751 INFO L470 AbstractCegarLoop]: Abstraction has 13803 states and 18505 transitions. [2021-11-07 02:17:01,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.75) internal successors, (187), 4 states have internal predecessors, (187), 0 states have call successors, (0), 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 02:17:01,751 INFO L276 IsEmpty]: Start isEmpty. Operand 13803 states and 18505 transitions. [2021-11-07 02:17:01,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-07 02:17:01,762 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:17:01,762 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:17:01,797 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-07 02:17:01,993 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (23)] Ended with exit code 0 [2021-11-07 02:17:02,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:17:02,186 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:17:02,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:17:02,186 INFO L85 PathProgramCache]: Analyzing trace with hash 777978127, now seen corresponding path program 1 times [2021-11-07 02:17:02,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:17:02,187 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2121212272] [2021-11-07 02:17:02,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:17:02,187 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:17:02,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:17:02,188 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:17:02,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-07 02:17:04,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:17:04,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 1195 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:17:04,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:17:04,497 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-11-07 02:17:04,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:17:04,880 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-11-07 02:17:04,880 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:17:04,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2121212272] [2021-11-07 02:17:04,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2121212272] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:17:04,880 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:17:04,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:17:04,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726387914] [2021-11-07 02:17:04,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:17:04,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:17:04,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:17:04,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:17:04,882 INFO L87 Difference]: Start difference. First operand 13803 states and 18505 transitions. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:17:08,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:17:08,698 INFO L93 Difference]: Finished difference Result 36419 states and 49238 transitions. [2021-11-07 02:17:08,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:17:08,698 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 146 [2021-11-07 02:17:08,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:17:08,733 INFO L225 Difference]: With dead ends: 36419 [2021-11-07 02:17:08,733 INFO L226 Difference]: Without dead ends: 22548 [2021-11-07 02:17:08,755 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 289 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 02:17:08,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22548 states. [2021-11-07 02:17:12,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22548 to 22338. [2021-11-07 02:17:12,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22338 states, 21857 states have (on average 1.3588324106693508) internal successors, (29700), 21905 states have internal predecessors, (29700), 288 states have call successors, (288), 192 states have call predecessors, (288), 192 states have return successors, (288), 288 states have call predecessors, (288), 288 states have call successors, (288) [2021-11-07 02:17:12,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22338 states to 22338 states and 30276 transitions. [2021-11-07 02:17:12,295 INFO L78 Accepts]: Start accepts. Automaton has 22338 states and 30276 transitions. Word has length 146 [2021-11-07 02:17:12,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:17:12,295 INFO L470 AbstractCegarLoop]: Abstraction has 22338 states and 30276 transitions. [2021-11-07 02:17:12,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:17:12,295 INFO L276 IsEmpty]: Start isEmpty. Operand 22338 states and 30276 transitions. [2021-11-07 02:17:12,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-07 02:17:12,308 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:17:12,308 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:17:12,334 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-07 02:17:12,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:17:12,509 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:17:12,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:17:12,509 INFO L85 PathProgramCache]: Analyzing trace with hash -37439241, now seen corresponding path program 2 times [2021-11-07 02:17:12,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:17:12,510 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [462910955] [2021-11-07 02:17:12,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 02:17:12,511 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:17:12,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:17:12,511 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:17:12,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-07 02:17:36,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 02:17:36,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:17:36,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 1195 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:17:36,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:17:37,313 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-07 02:17:37,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:17:37,753 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-07 02:17:37,753 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:17:37,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [462910955] [2021-11-07 02:17:37,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [462910955] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:17:37,754 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:17:37,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:17:37,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860877102] [2021-11-07 02:17:37,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:17:37,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:17:37,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:17:37,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:17:37,755 INFO L87 Difference]: Start difference. First operand 22338 states and 30276 transitions. Second operand has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 0 states have call successors, (0), 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 02:17:43,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:17:43,154 INFO L93 Difference]: Finished difference Result 43467 states and 59069 transitions. [2021-11-07 02:17:43,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:17:43,155 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 0 states have call successors, (0), 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 146 [2021-11-07 02:17:43,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:17:43,186 INFO L225 Difference]: With dead ends: 43467 [2021-11-07 02:17:43,187 INFO L226 Difference]: Without dead ends: 21187 [2021-11-07 02:17:43,207 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 288 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 02:17:43,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21187 states. [2021-11-07 02:17:46,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21187 to 20558. [2021-11-07 02:17:46,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20558 states, 20117 states have (on average 1.3618332753392652) internal successors, (27396), 20161 states have internal predecessors, (27396), 264 states have call successors, (264), 176 states have call predecessors, (264), 176 states have return successors, (264), 264 states have call predecessors, (264), 264 states have call successors, (264) [2021-11-07 02:17:46,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20558 states to 20558 states and 27924 transitions. [2021-11-07 02:17:46,212 INFO L78 Accepts]: Start accepts. Automaton has 20558 states and 27924 transitions. Word has length 146 [2021-11-07 02:17:46,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:17:46,212 INFO L470 AbstractCegarLoop]: Abstraction has 20558 states and 27924 transitions. [2021-11-07 02:17:46,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 0 states have call successors, (0), 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 02:17:46,212 INFO L276 IsEmpty]: Start isEmpty. Operand 20558 states and 27924 transitions. [2021-11-07 02:17:46,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-07 02:17:46,222 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:17:46,222 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 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] [2021-11-07 02:17:46,269 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2021-11-07 02:17:46,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:17:46,423 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:17:46,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:17:46,423 INFO L85 PathProgramCache]: Analyzing trace with hash 933941352, now seen corresponding path program 1 times [2021-11-07 02:17:46,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:17:46,424 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1326329680] [2021-11-07 02:17:46,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:17:46,424 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:17:46,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:17:46,425 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:17:46,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-07 02:17:48,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:17:48,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 1150 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:17:48,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:17:48,910 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 38 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 02:17:48,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:17:49,627 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 38 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 02:17:49,627 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:17:49,628 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1326329680] [2021-11-07 02:17:49,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1326329680] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:17:49,628 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [825317390] [2021-11-07 02:17:49,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:17:49,628 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:17:49,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:17:49,634 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:17:49,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-11-07 02:17:52,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:17:52,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 1150 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:17:52,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:17:53,189 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 38 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 02:17:53,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:17:53,599 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 38 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 02:17:53,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [825317390] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:17:53,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823550587] [2021-11-07 02:17:53,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:17:53,600 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:17:53,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:17:53,609 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:17:53,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f154776-f235-4043-8c10-1b0d461444af/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-07 02:17:55,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:17:55,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 1150 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-07 02:17:55,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:17:56,839 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-07 02:17:56,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:17:57,994 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-07 02:17:57,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823550587] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:17:57,995 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-11-07 02:17:57,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [9, 9, 9, 9] total 30 [2021-11-07 02:17:57,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031129152] [2021-11-07 02:17:57,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 02:17:57,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:17:57,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 02:17:57,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=757, Unknown=0, NotChecked=0, Total=870 [2021-11-07 02:17:57,997 INFO L87 Difference]: Start difference. First operand 20558 states and 27924 transitions. Second operand has 16 states, 16 states have (on average 8.3125) internal successors, (133), 16 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)