./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec3_product35.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- 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_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/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_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec3_product35.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/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 32bit --witnessprinter.graph.data.programhash a235b81518d1466c5f4be9b22c3eaea6ff575e28236a3798a0ed19e321bfc6e0 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:34:11,550 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:34:11,554 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:34:11,616 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:34:11,617 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:34:11,619 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:34:11,621 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:34:11,624 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:34:11,627 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:34:11,628 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:34:11,630 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:34:11,632 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:34:11,633 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:34:11,634 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:34:11,636 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:34:11,639 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:34:11,640 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:34:11,642 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:34:11,645 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:34:11,648 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:34:11,650 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:34:11,653 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:34:11,655 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:34:11,656 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:34:11,661 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:34:11,662 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:34:11,663 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:34:11,664 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:34:11,665 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:34:11,667 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:34:11,668 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:34:11,669 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:34:11,670 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:34:11,672 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:34:11,673 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:34:11,674 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:34:11,675 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:34:11,676 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:34:11,677 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:34:11,678 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:34:11,679 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:34:11,681 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:34:11,711 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:34:11,711 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:34:11,712 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:34:11,713 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:34:11,713 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:34:11,713 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:34:11,714 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:34:11,714 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:34:11,714 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:34:11,715 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:34:11,715 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:34:11,715 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:34:11,716 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:34:11,716 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:34:11,716 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:34:11,718 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:34:11,718 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:34:11,718 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:34:11,719 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:34:11,719 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:34:11,719 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:34:11,719 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:34:11,720 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:34:11,720 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:34:11,721 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:34:11,721 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:34:11,721 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:34:11,722 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:34:11,722 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:34:11,722 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:34:11,723 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:34:11,723 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:34:11,724 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:34:11,724 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:34:11,724 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:34:11,724 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:34:11,725 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:34:11,725 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:34:11,725 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:34:11,726 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_6c8fd675-9acb-442e-bba2-28b29e988cc3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a235b81518d1466c5f4be9b22c3eaea6ff575e28236a3798a0ed19e321bfc6e0 [2021-11-07 01:34:12,042 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:34:12,065 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:34:12,069 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:34:12,070 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:34:12,071 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:34:12,072 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec3_product35.cil.c [2021-11-07 01:34:12,154 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/data/e72611ae7/1a2f06cce6514fa983e1b3ff418b2133/FLAGb440179c6 [2021-11-07 01:34:12,902 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:34:12,903 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/sv-benchmarks/c/product-lines/email_spec3_product35.cil.c [2021-11-07 01:34:12,943 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/data/e72611ae7/1a2f06cce6514fa983e1b3ff418b2133/FLAGb440179c6 [2021-11-07 01:34:13,060 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/data/e72611ae7/1a2f06cce6514fa983e1b3ff418b2133 [2021-11-07 01:34:13,063 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:34:13,065 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:34:13,067 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:34:13,068 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:34:13,080 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:34:13,081 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:34:13" (1/1) ... [2021-11-07 01:34:13,083 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@706d5014 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:34:13, skipping insertion in model container [2021-11-07 01:34:13,083 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:34:13" (1/1) ... [2021-11-07 01:34:13,092 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:34:13,193 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:34:13,975 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_6c8fd675-9acb-442e-bba2-28b29e988cc3/sv-benchmarks/c/product-lines/email_spec3_product35.cil.c[61781,61794] [2021-11-07 01:34:13,984 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:34:13,999 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-07 01:34:14,000 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7a6fcbc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:34:13, skipping insertion in model container [2021-11-07 01:34:14,000 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:34:14,000 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:34:14,003 INFO L168 Benchmark]: Toolchain (without parser) took 936.39 ms. Allocated memory was 113.2 MB in the beginning and 146.8 MB in the end (delta: 33.6 MB). Free memory was 83.1 MB in the beginning and 107.1 MB in the end (delta: -24.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-07 01:34:14,004 INFO L168 Benchmark]: CDTParser took 0.34 ms. Allocated memory is still 113.2 MB. Free memory was 68.4 MB in the beginning and 68.3 MB in the end (delta: 64.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:34:14,006 INFO L168 Benchmark]: CACSL2BoogieTranslator took 932.85 ms. Allocated memory was 113.2 MB in the beginning and 146.8 MB in the end (delta: 33.6 MB). Free memory was 82.7 MB in the beginning and 107.1 MB in the end (delta: -24.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-07 01:34:14,008 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34 ms. Allocated memory is still 113.2 MB. Free memory was 68.4 MB in the beginning and 68.3 MB in the end (delta: 64.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 932.85 ms. Allocated memory was 113.2 MB in the beginning and 146.8 MB in the end (delta: 33.6 MB). Free memory was 82.7 MB in the beginning and 107.1 MB in the end (delta: -24.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 2536]: 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_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/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_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec3_product35.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/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 32bit --witnessprinter.graph.data.programhash a235b81518d1466c5f4be9b22c3eaea6ff575e28236a3798a0ed19e321bfc6e0 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:34:16,743 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:34:16,747 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:34:16,816 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:34:16,817 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:34:16,822 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:34:16,824 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:34:16,830 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:34:16,834 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:34:16,844 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:34:16,846 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:34:16,848 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:34:16,849 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:34:16,852 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:34:16,855 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:34:16,860 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:34:16,862 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:34:16,864 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:34:16,866 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:34:16,878 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:34:16,881 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:34:16,883 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:34:16,886 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:34:16,887 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:34:16,901 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:34:16,902 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:34:16,902 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:34:16,905 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:34:16,906 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:34:16,907 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:34:16,908 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:34:16,909 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:34:16,912 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:34:16,913 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:34:16,915 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:34:16,915 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:34:16,917 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:34:16,917 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:34:16,917 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:34:16,920 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:34:16,921 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:34:16,922 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:34:16,976 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:34:16,977 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:34:16,978 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:34:16,979 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:34:16,979 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:34:16,979 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:34:16,980 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:34:16,980 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:34:16,980 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:34:16,982 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:34:16,984 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:34:16,984 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:34:16,984 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:34:16,985 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:34:16,985 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:34:16,985 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:34:16,986 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:34:16,986 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:34:16,986 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:34:16,986 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:34:16,987 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:34:16,987 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:34:16,987 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:34:16,988 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:34:16,988 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:34:16,988 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:34:16,988 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:34:16,989 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:34:16,989 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:34:16,989 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:34:16,990 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:34:16,990 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:34:16,990 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:34:16,990 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:34:16,991 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:34:16,992 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_6c8fd675-9acb-442e-bba2-28b29e988cc3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a235b81518d1466c5f4be9b22c3eaea6ff575e28236a3798a0ed19e321bfc6e0 [2021-11-07 01:34:17,477 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:34:17,505 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:34:17,508 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:34:17,510 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:34:17,511 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:34:17,512 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec3_product35.cil.c [2021-11-07 01:34:17,594 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/data/97e05e9c3/94b13a970f4042628253910f02f44fc8/FLAGd31016bbc [2021-11-07 01:34:18,422 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:34:18,426 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/sv-benchmarks/c/product-lines/email_spec3_product35.cil.c [2021-11-07 01:34:18,458 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/data/97e05e9c3/94b13a970f4042628253910f02f44fc8/FLAGd31016bbc [2021-11-07 01:34:18,529 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/data/97e05e9c3/94b13a970f4042628253910f02f44fc8 [2021-11-07 01:34:18,532 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:34:18,533 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:34:18,537 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:34:18,537 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:34:18,557 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:34:18,558 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:34:18" (1/1) ... [2021-11-07 01:34:18,559 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f5f4291 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:34:18, skipping insertion in model container [2021-11-07 01:34:18,559 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:34:18" (1/1) ... [2021-11-07 01:34:18,571 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:34:18,695 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:34:19,579 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_6c8fd675-9acb-442e-bba2-28b29e988cc3/sv-benchmarks/c/product-lines/email_spec3_product35.cil.c[61781,61794] [2021-11-07 01:34:19,596 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:34:19,622 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:34:19,713 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:34:19,908 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_6c8fd675-9acb-442e-bba2-28b29e988cc3/sv-benchmarks/c/product-lines/email_spec3_product35.cil.c[61781,61794] [2021-11-07 01:34:19,914 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:34:19,927 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:34:20,097 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_6c8fd675-9acb-442e-bba2-28b29e988cc3/sv-benchmarks/c/product-lines/email_spec3_product35.cil.c[61781,61794] [2021-11-07 01:34:20,102 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:34:20,174 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:34:20,175 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:34:20 WrapperNode [2021-11-07 01:34:20,175 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:34:20,176 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:34:20,177 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:34:20,177 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:34:20,186 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:34:20" (1/1) ... [2021-11-07 01:34:20,262 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:34:20" (1/1) ... [2021-11-07 01:34:20,517 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:34:20,518 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:34:20,518 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:34:20,519 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:34:20,529 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:34:20" (1/1) ... [2021-11-07 01:34:20,530 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:34:20" (1/1) ... [2021-11-07 01:34:20,547 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:34:20" (1/1) ... [2021-11-07 01:34:20,548 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:34:20" (1/1) ... [2021-11-07 01:34:20,689 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:34:20" (1/1) ... [2021-11-07 01:34:20,739 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:34:20" (1/1) ... [2021-11-07 01:34:20,752 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:34:20" (1/1) ... [2021-11-07 01:34:20,783 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:34:20,785 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:34:20,785 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:34:20,785 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:34:20,786 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:34:20" (1/1) ... [2021-11-07 01:34:20,795 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:34:20,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:34:20,840 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:34:20,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:34:20,896 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 01:34:20,896 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:34:20,897 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:34:20,897 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:34:20,897 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:34:29,208 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:34:29,209 INFO L299 CfgBuilder]: Removed 985 assume(true) statements. [2021-11-07 01:34:29,215 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:34:29 BoogieIcfgContainer [2021-11-07 01:34:29,215 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:34:29,218 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:34:29,218 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:34:29,222 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:34:29,222 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:34:18" (1/3) ... [2021-11-07 01:34:29,223 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@536c414c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:34:29, skipping insertion in model container [2021-11-07 01:34:29,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:34:20" (2/3) ... [2021-11-07 01:34:29,224 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@536c414c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:34:29, skipping insertion in model container [2021-11-07 01:34:29,225 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:34:29" (3/3) ... [2021-11-07 01:34:29,226 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec3_product35.cil.c [2021-11-07 01:34:29,233 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:34:29,234 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2021-11-07 01:34:29,305 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:34:29,313 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 01:34:29,313 INFO L340 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2021-11-07 01:34:29,379 INFO L276 IsEmpty]: Start isEmpty. Operand has 1456 states, 1443 states have (on average 1.7276507276507276) internal successors, (2493), 1455 states have internal predecessors, (2493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:29,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 01:34:29,402 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:34:29,403 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:34:29,404 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:34:29,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:34:29,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1381723739, now seen corresponding path program 1 times [2021-11-07 01:34:29,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:34:29,429 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [745756085] [2021-11-07 01:34:29,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:34:29,430 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:34:29,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:34:29,433 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:34:29,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:34:30,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:34:30,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:34:30,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:34:30,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:34:30,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:34:30,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:34:30,745 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:34:30,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [745756085] [2021-11-07 01:34:30,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [745756085] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:34:30,746 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:34:30,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:34:30,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821540810] [2021-11-07 01:34:30,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:34:30,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:34:30,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:34:30,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:34:30,788 INFO L87 Difference]: Start difference. First operand has 1456 states, 1443 states have (on average 1.7276507276507276) internal successors, (2493), 1455 states have internal predecessors, (2493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 30.0) internal successors, (60), 2 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:30,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:34:30,939 INFO L93 Difference]: Finished difference Result 2623 states and 4456 transitions. [2021-11-07 01:34:30,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:34:30,941 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 30.0) internal successors, (60), 2 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-07 01:34:30,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:34:30,978 INFO L225 Difference]: With dead ends: 2623 [2021-11-07 01:34:30,978 INFO L226 Difference]: Without dead ends: 1268 [2021-11-07 01:34:30,992 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:34:31,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1268 states. [2021-11-07 01:34:31,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1268 to 1268. [2021-11-07 01:34:31,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1268 states, 1256 states have (on average 1.7261146496815287) internal successors, (2168), 1267 states have internal predecessors, (2168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:31,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1268 states to 1268 states and 2168 transitions. [2021-11-07 01:34:31,141 INFO L78 Accepts]: Start accepts. Automaton has 1268 states and 2168 transitions. Word has length 60 [2021-11-07 01:34:31,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:34:31,142 INFO L470 AbstractCegarLoop]: Abstraction has 1268 states and 2168 transitions. [2021-11-07 01:34:31,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 30.0) internal successors, (60), 2 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:31,143 INFO L276 IsEmpty]: Start isEmpty. Operand 1268 states and 2168 transitions. [2021-11-07 01:34:31,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-07 01:34:31,158 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:34:31,158 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:34:31,180 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:34:31,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:34:31,360 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:34:31,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:34:31,361 INFO L85 PathProgramCache]: Analyzing trace with hash 2157638, now seen corresponding path program 1 times [2021-11-07 01:34:31,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:34:31,363 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1510261056] [2021-11-07 01:34:31,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:34:31,363 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:34:31,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:34:31,369 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:34:31,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:34:31,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:34:31,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:34:31,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:34:32,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:34:32,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:34:32,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:34:32,413 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:34:32,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1510261056] [2021-11-07 01:34:32,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1510261056] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:34:32,415 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:34:32,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:34:32,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927586761] [2021-11-07 01:34:32,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:34:32,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:34:32,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:34:32,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:34:32,424 INFO L87 Difference]: Start difference. First operand 1268 states and 2168 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:32,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:34:32,729 INFO L93 Difference]: Finished difference Result 3774 states and 6456 transitions. [2021-11-07 01:34:32,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:34:32,734 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-07 01:34:32,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:34:32,757 INFO L225 Difference]: With dead ends: 3774 [2021-11-07 01:34:32,757 INFO L226 Difference]: Without dead ends: 2521 [2021-11-07 01:34:32,762 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:34:32,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2521 states. [2021-11-07 01:34:32,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2521 to 1267. [2021-11-07 01:34:32,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1267 states, 1255 states have (on average 1.7235059760956175) internal successors, (2163), 1266 states have internal predecessors, (2163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:32,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1267 states to 1267 states and 2163 transitions. [2021-11-07 01:34:32,856 INFO L78 Accepts]: Start accepts. Automaton has 1267 states and 2163 transitions. Word has length 61 [2021-11-07 01:34:32,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:34:32,857 INFO L470 AbstractCegarLoop]: Abstraction has 1267 states and 2163 transitions. [2021-11-07 01:34:32,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:32,858 INFO L276 IsEmpty]: Start isEmpty. Operand 1267 states and 2163 transitions. [2021-11-07 01:34:32,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-07 01:34:32,861 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:34:32,862 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:34:32,894 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:34:33,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:34:33,096 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:34:33,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:34:33,097 INFO L85 PathProgramCache]: Analyzing trace with hash -670849364, now seen corresponding path program 1 times [2021-11-07 01:34:33,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:34:33,099 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1239222932] [2021-11-07 01:34:33,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:34:33,099 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:34:33,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:34:33,101 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:34:33,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:34:33,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:34:33,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:34:33,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:34:33,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:34:33,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:34:34,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:34:34,211 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:34:34,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1239222932] [2021-11-07 01:34:34,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1239222932] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:34:34,212 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:34:34,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:34:34,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79184925] [2021-11-07 01:34:34,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:34:34,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:34:34,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:34:34,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:34:34,214 INFO L87 Difference]: Start difference. First operand 1267 states and 2163 transitions. Second operand has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:34,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:34:34,762 INFO L93 Difference]: Finished difference Result 4985 states and 8514 transitions. [2021-11-07 01:34:34,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:34:34,763 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-07 01:34:34,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:34:34,802 INFO L225 Difference]: With dead ends: 4985 [2021-11-07 01:34:34,802 INFO L226 Difference]: Without dead ends: 3736 [2021-11-07 01:34:34,806 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:34:34,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3736 states. [2021-11-07 01:34:34,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3736 to 1266. [2021-11-07 01:34:34,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1266 states, 1254 states have (on average 1.7216905901116428) internal successors, (2159), 1265 states have internal predecessors, (2159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:34,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1266 states to 1266 states and 2159 transitions. [2021-11-07 01:34:34,945 INFO L78 Accepts]: Start accepts. Automaton has 1266 states and 2159 transitions. Word has length 63 [2021-11-07 01:34:34,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:34:34,946 INFO L470 AbstractCegarLoop]: Abstraction has 1266 states and 2159 transitions. [2021-11-07 01:34:34,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:34,947 INFO L276 IsEmpty]: Start isEmpty. Operand 1266 states and 2159 transitions. [2021-11-07 01:34:34,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 01:34:34,949 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:34:34,949 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:34:34,973 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:34:35,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:34:35,167 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:34:35,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:34:35,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1128819265, now seen corresponding path program 1 times [2021-11-07 01:34:35,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:34:35,170 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1164814861] [2021-11-07 01:34:35,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:34:35,170 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:34:35,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:34:35,172 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:34:35,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:34:35,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:34:35,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:34:35,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:34:36,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:34:36,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:34:36,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:34:36,257 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:34:36,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1164814861] [2021-11-07 01:34:36,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1164814861] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:34:36,258 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:34:36,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:34:36,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962419528] [2021-11-07 01:34:36,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:34:36,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:34:36,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:34:36,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:34:36,260 INFO L87 Difference]: Start difference. First operand 1266 states and 2159 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:36,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:34:36,415 INFO L93 Difference]: Finished difference Result 2529 states and 4315 transitions. [2021-11-07 01:34:36,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:34:36,416 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 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 64 [2021-11-07 01:34:36,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:34:36,424 INFO L225 Difference]: With dead ends: 2529 [2021-11-07 01:34:36,424 INFO L226 Difference]: Without dead ends: 1271 [2021-11-07 01:34:36,427 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:34:36,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1271 states. [2021-11-07 01:34:36,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1271 to 1266. [2021-11-07 01:34:36,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1266 states, 1254 states have (on average 1.719298245614035) internal successors, (2156), 1265 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:36,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1266 states to 1266 states and 2156 transitions. [2021-11-07 01:34:36,517 INFO L78 Accepts]: Start accepts. Automaton has 1266 states and 2156 transitions. Word has length 64 [2021-11-07 01:34:36,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:34:36,518 INFO L470 AbstractCegarLoop]: Abstraction has 1266 states and 2156 transitions. [2021-11-07 01:34:36,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:36,519 INFO L276 IsEmpty]: Start isEmpty. Operand 1266 states and 2156 transitions. [2021-11-07 01:34:36,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 01:34:36,521 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:34:36,521 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:34:36,546 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:34:36,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:34:36,740 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:34:36,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:34:36,740 INFO L85 PathProgramCache]: Analyzing trace with hash -792722028, now seen corresponding path program 1 times [2021-11-07 01:34:36,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:34:36,742 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [756074298] [2021-11-07 01:34:36,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:34:36,742 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:34:36,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:34:36,744 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:34:36,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:34:37,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:34:37,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:34:37,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:34:37,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:34:37,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:34:37,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:34:37,747 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:34:37,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [756074298] [2021-11-07 01:34:37,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [756074298] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:34:37,748 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:34:37,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:34:37,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313915142] [2021-11-07 01:34:37,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:34:37,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:34:37,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:34:37,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:34:37,750 INFO L87 Difference]: Start difference. First operand 1266 states and 2156 transitions. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:38,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:34:38,342 INFO L93 Difference]: Finished difference Result 4972 states and 8490 transitions. [2021-11-07 01:34:38,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:34:38,342 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-07 01:34:38,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:34:38,371 INFO L225 Difference]: With dead ends: 4972 [2021-11-07 01:34:38,372 INFO L226 Difference]: Without dead ends: 3732 [2021-11-07 01:34:38,377 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:34:38,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3732 states. [2021-11-07 01:34:38,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3732 to 1266. [2021-11-07 01:34:38,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1266 states, 1254 states have (on average 1.7169059011164274) internal successors, (2153), 1265 states have internal predecessors, (2153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:38,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1266 states to 1266 states and 2153 transitions. [2021-11-07 01:34:38,509 INFO L78 Accepts]: Start accepts. Automaton has 1266 states and 2153 transitions. Word has length 65 [2021-11-07 01:34:38,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:34:38,510 INFO L470 AbstractCegarLoop]: Abstraction has 1266 states and 2153 transitions. [2021-11-07 01:34:38,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:38,510 INFO L276 IsEmpty]: Start isEmpty. Operand 1266 states and 2153 transitions. [2021-11-07 01:34:38,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 01:34:38,513 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:34:38,513 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:34:38,542 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:34:38,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:34:38,734 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:34:38,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:34:38,735 INFO L85 PathProgramCache]: Analyzing trace with hash -580225521, now seen corresponding path program 1 times [2021-11-07 01:34:38,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:34:38,736 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [125033299] [2021-11-07 01:34:38,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:34:38,737 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:34:38,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:34:38,738 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:34:38,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:34:39,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:34:39,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:34:39,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:34:39,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:34:39,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:34:39,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:34:39,699 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:34:39,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [125033299] [2021-11-07 01:34:39,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [125033299] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:34:39,699 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:34:39,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:34:39,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285434501] [2021-11-07 01:34:39,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:34:39,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:34:39,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:34:39,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:34:39,701 INFO L87 Difference]: Start difference. First operand 1266 states and 2153 transitions. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:39,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:34:39,932 INFO L93 Difference]: Finished difference Result 3485 states and 5917 transitions. [2021-11-07 01:34:39,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:34:39,933 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-07 01:34:39,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:34:39,951 INFO L225 Difference]: With dead ends: 3485 [2021-11-07 01:34:39,952 INFO L226 Difference]: Without dead ends: 2506 [2021-11-07 01:34:39,955 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:34:39,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2506 states. [2021-11-07 01:34:40,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2506 to 1527. [2021-11-07 01:34:40,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1527 states, 1515 states have (on average 1.7379537953795379) internal successors, (2633), 1526 states have internal predecessors, (2633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:40,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1527 states to 1527 states and 2633 transitions. [2021-11-07 01:34:40,100 INFO L78 Accepts]: Start accepts. Automaton has 1527 states and 2633 transitions. Word has length 67 [2021-11-07 01:34:40,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:34:40,101 INFO L470 AbstractCegarLoop]: Abstraction has 1527 states and 2633 transitions. [2021-11-07 01:34:40,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:40,101 INFO L276 IsEmpty]: Start isEmpty. Operand 1527 states and 2633 transitions. [2021-11-07 01:34:40,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-07 01:34:40,105 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:34:40,105 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:34:40,124 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-11-07 01:34:40,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:34:40,324 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:34:40,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:34:40,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1190214976, now seen corresponding path program 1 times [2021-11-07 01:34:40,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:34:40,326 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [978402815] [2021-11-07 01:34:40,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:34:40,326 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:34:40,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:34:40,327 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:34:40,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:34:40,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:34:40,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:34:40,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:34:41,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:34:41,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:34:41,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:34:41,441 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:34:41,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [978402815] [2021-11-07 01:34:41,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [978402815] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:34:41,441 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:34:41,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:34:41,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370653036] [2021-11-07 01:34:41,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:34:41,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:34:41,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:34:41,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:34:41,443 INFO L87 Difference]: Start difference. First operand 1527 states and 2633 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:41,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:34:41,683 INFO L93 Difference]: Finished difference Result 4158 states and 7158 transitions. [2021-11-07 01:34:41,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:34:41,684 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-07 01:34:41,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:34:41,704 INFO L225 Difference]: With dead ends: 4158 [2021-11-07 01:34:41,704 INFO L226 Difference]: Without dead ends: 2715 [2021-11-07 01:34:41,709 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:34:41,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2715 states. [2021-11-07 01:34:41,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2715 to 1736. [2021-11-07 01:34:41,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1736 states, 1724 states have (on average 1.7494199535962878) internal successors, (3016), 1735 states have internal predecessors, (3016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:41,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1736 states to 1736 states and 3016 transitions. [2021-11-07 01:34:41,871 INFO L78 Accepts]: Start accepts. Automaton has 1736 states and 3016 transitions. Word has length 79 [2021-11-07 01:34:41,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:34:41,874 INFO L470 AbstractCegarLoop]: Abstraction has 1736 states and 3016 transitions. [2021-11-07 01:34:41,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:41,875 INFO L276 IsEmpty]: Start isEmpty. Operand 1736 states and 3016 transitions. [2021-11-07 01:34:41,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-07 01:34:41,885 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:34:41,886 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:34:41,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:34:42,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:34:42,102 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:34:42,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:34:42,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1475690655, now seen corresponding path program 1 times [2021-11-07 01:34:42,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:34:42,104 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [73346229] [2021-11-07 01:34:42,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:34:42,104 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:34:42,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:34:42,106 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:34:42,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:34:42,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:34:42,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:34:42,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:34:42,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:34:42,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:34:43,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:34:43,210 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:34:43,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [73346229] [2021-11-07 01:34:43,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [73346229] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:34:43,210 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:34:43,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:34:43,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613545118] [2021-11-07 01:34:43,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:34:43,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:34:43,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:34:43,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:34:43,213 INFO L87 Difference]: Start difference. First operand 1736 states and 3016 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:43,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:34:43,476 INFO L93 Difference]: Finished difference Result 4817 states and 8372 transitions. [2021-11-07 01:34:43,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:34:43,477 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-07 01:34:43,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:34:43,505 INFO L225 Difference]: With dead ends: 4817 [2021-11-07 01:34:43,506 INFO L226 Difference]: Without dead ends: 3173 [2021-11-07 01:34:43,512 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:34:43,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3173 states. [2021-11-07 01:34:43,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3173 to 2194. [2021-11-07 01:34:43,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2194 states, 2182 states have (on average 1.768102658111824) internal successors, (3858), 2193 states have internal predecessors, (3858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:43,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2194 states to 2194 states and 3858 transitions. [2021-11-07 01:34:43,738 INFO L78 Accepts]: Start accepts. Automaton has 2194 states and 3858 transitions. Word has length 80 [2021-11-07 01:34:43,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:34:43,738 INFO L470 AbstractCegarLoop]: Abstraction has 2194 states and 3858 transitions. [2021-11-07 01:34:43,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:43,739 INFO L276 IsEmpty]: Start isEmpty. Operand 2194 states and 3858 transitions. [2021-11-07 01:34:43,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-07 01:34:43,744 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:34:43,744 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:34:43,769 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:34:43,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:34:43,969 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:34:43,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:34:43,969 INFO L85 PathProgramCache]: Analyzing trace with hash -586853650, now seen corresponding path program 1 times [2021-11-07 01:34:43,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:34:43,971 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [9233412] [2021-11-07 01:34:43,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:34:43,971 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:34:43,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:34:43,972 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:34:43,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:34:44,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:34:44,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:34:44,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:34:44,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:34:44,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:34:45,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:34:45,054 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:34:45,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [9233412] [2021-11-07 01:34:45,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [9233412] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:34:45,055 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:34:45,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:34:45,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385689411] [2021-11-07 01:34:45,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:34:45,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:34:45,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:34:45,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:34:45,058 INFO L87 Difference]: Start difference. First operand 2194 states and 3858 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:45,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:34:45,416 INFO L93 Difference]: Finished difference Result 6171 states and 10867 transitions. [2021-11-07 01:34:45,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:34:45,417 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 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 81 [2021-11-07 01:34:45,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:34:45,446 INFO L225 Difference]: With dead ends: 6171 [2021-11-07 01:34:45,446 INFO L226 Difference]: Without dead ends: 4077 [2021-11-07 01:34:45,451 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:34:45,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4077 states. [2021-11-07 01:34:45,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4077 to 3098. [2021-11-07 01:34:45,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3098 states, 3086 states have (on average 1.789047310434219) internal successors, (5521), 3097 states have internal predecessors, (5521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:45,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3098 states to 3098 states and 5521 transitions. [2021-11-07 01:34:45,708 INFO L78 Accepts]: Start accepts. Automaton has 3098 states and 5521 transitions. Word has length 81 [2021-11-07 01:34:45,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:34:45,708 INFO L470 AbstractCegarLoop]: Abstraction has 3098 states and 5521 transitions. [2021-11-07 01:34:45,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:45,709 INFO L276 IsEmpty]: Start isEmpty. Operand 3098 states and 5521 transitions. [2021-11-07 01:34:45,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-07 01:34:45,717 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:34:45,717 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:34:45,738 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:34:45,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:34:45,938 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:34:45,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:34:45,939 INFO L85 PathProgramCache]: Analyzing trace with hash -744443794, now seen corresponding path program 1 times [2021-11-07 01:34:45,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:34:45,940 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [748441899] [2021-11-07 01:34:45,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:34:45,940 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:34:45,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:34:45,941 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:34:45,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:34:46,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:34:46,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:34:46,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:34:46,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:34:46,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:34:47,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:34:47,137 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:34:47,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [748441899] [2021-11-07 01:34:47,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [748441899] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:34:47,137 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:34:47,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:34:47,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959589824] [2021-11-07 01:34:47,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:34:47,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:34:47,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:34:47,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:34:47,140 INFO L87 Difference]: Start difference. First operand 3098 states and 5521 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:47,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:34:47,538 INFO L93 Difference]: Finished difference Result 8619 states and 15375 transitions. [2021-11-07 01:34:47,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:34:47,538 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-07 01:34:47,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:34:47,559 INFO L225 Difference]: With dead ends: 8619 [2021-11-07 01:34:47,560 INFO L226 Difference]: Without dead ends: 5655 [2021-11-07 01:34:47,567 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:34:47,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5655 states. [2021-11-07 01:34:47,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5655 to 4676. [2021-11-07 01:34:47,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4676 states, 4664 states have (on average 1.805746140651801) internal successors, (8422), 4675 states have internal predecessors, (8422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:47,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4676 states to 4676 states and 8422 transitions. [2021-11-07 01:34:47,952 INFO L78 Accepts]: Start accepts. Automaton has 4676 states and 8422 transitions. Word has length 82 [2021-11-07 01:34:47,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:34:47,953 INFO L470 AbstractCegarLoop]: Abstraction has 4676 states and 8422 transitions. [2021-11-07 01:34:47,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:47,953 INFO L276 IsEmpty]: Start isEmpty. Operand 4676 states and 8422 transitions. [2021-11-07 01:34:47,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-07 01:34:47,964 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:34:47,964 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:34:47,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:34:48,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:34:48,184 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:34:48,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:34:48,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1831068447, now seen corresponding path program 1 times [2021-11-07 01:34:48,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:34:48,186 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [489385578] [2021-11-07 01:34:48,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:34:48,186 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:34:48,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:34:48,188 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:34:48,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:34:49,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:34:49,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 569 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:34:49,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:34:49,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:34:49,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:34:49,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:34:49,668 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:34:49,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [489385578] [2021-11-07 01:34:49,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [489385578] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:34:49,669 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:34:49,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:34:49,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913193740] [2021-11-07 01:34:49,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:34:49,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:34:49,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:34:49,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:34:49,674 INFO L87 Difference]: Start difference. First operand 4676 states and 8422 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:50,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:34:50,217 INFO L93 Difference]: Finished difference Result 13069 states and 23561 transitions. [2021-11-07 01:34:50,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:34:50,229 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-07 01:34:50,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:34:50,269 INFO L225 Difference]: With dead ends: 13069 [2021-11-07 01:34:50,270 INFO L226 Difference]: Without dead ends: 8561 [2021-11-07 01:34:50,280 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:34:50,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8561 states. [2021-11-07 01:34:50,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8561 to 7582. [2021-11-07 01:34:50,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7582 states, 7570 states have (on average 1.817569352708058) internal successors, (13759), 7581 states have internal predecessors, (13759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:51,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7582 states to 7582 states and 13759 transitions. [2021-11-07 01:34:51,002 INFO L78 Accepts]: Start accepts. Automaton has 7582 states and 13759 transitions. Word has length 83 [2021-11-07 01:34:51,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:34:51,003 INFO L470 AbstractCegarLoop]: Abstraction has 7582 states and 13759 transitions. [2021-11-07 01:34:51,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:51,004 INFO L276 IsEmpty]: Start isEmpty. Operand 7582 states and 13759 transitions. [2021-11-07 01:34:51,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-07 01:34:51,019 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:34:51,020 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:34:51,043 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:34:51,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:34:51,239 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:34:51,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:34:51,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1043423361, now seen corresponding path program 1 times [2021-11-07 01:34:51,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:34:51,241 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2085906157] [2021-11-07 01:34:51,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:34:51,241 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:34:51,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:34:51,243 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:34:51,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:34:52,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:34:52,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:34:52,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:34:52,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:34:52,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:34:52,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:34:52,683 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:34:52,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2085906157] [2021-11-07 01:34:52,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2085906157] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:34:52,683 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:34:52,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:34:52,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790538578] [2021-11-07 01:34:52,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:34:52,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:34:52,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:34:52,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:34:52,685 INFO L87 Difference]: Start difference. First operand 7582 states and 13759 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:53,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:34:53,283 INFO L93 Difference]: Finished difference Result 22113 states and 40183 transitions. [2021-11-07 01:34:53,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:34:53,283 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-11-07 01:34:53,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:34:53,404 INFO L225 Difference]: With dead ends: 22113 [2021-11-07 01:34:53,404 INFO L226 Difference]: Without dead ends: 14707 [2021-11-07 01:34:53,418 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:34:53,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14707 states. [2021-11-07 01:34:54,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14707 to 13728. [2021-11-07 01:34:54,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13728 states, 13716 states have (on average 1.8256051326917468) internal successors, (25040), 13727 states have internal predecessors, (25040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:54,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13728 states to 13728 states and 25040 transitions. [2021-11-07 01:34:54,238 INFO L78 Accepts]: Start accepts. Automaton has 13728 states and 25040 transitions. Word has length 84 [2021-11-07 01:34:54,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:34:54,238 INFO L470 AbstractCegarLoop]: Abstraction has 13728 states and 25040 transitions. [2021-11-07 01:34:54,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:54,239 INFO L276 IsEmpty]: Start isEmpty. Operand 13728 states and 25040 transitions. [2021-11-07 01:34:54,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-07 01:34:54,259 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:34:54,259 INFO L513 BasicCegarLoop]: trace histogram [3, 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] [2021-11-07 01:34:54,283 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:34:54,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:34:54,474 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:34:54,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:34:54,475 INFO L85 PathProgramCache]: Analyzing trace with hash 702078127, now seen corresponding path program 1 times [2021-11-07 01:34:54,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:34:54,476 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [418911109] [2021-11-07 01:34:54,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:34:54,476 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:34:54,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:34:54,478 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:34:54,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:34:55,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:34:55,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:34:55,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:34:55,499 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:34:55,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:34:55,940 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:34:55,940 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:34:55,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [418911109] [2021-11-07 01:34:55,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [418911109] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:34:55,941 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:34:55,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:34:55,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633142842] [2021-11-07 01:34:55,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:34:55,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:34:55,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:34:55,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:34:55,943 INFO L87 Difference]: Start difference. First operand 13728 states and 25040 transitions. Second operand has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:59,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:34:59,644 INFO L93 Difference]: Finished difference Result 34281 states and 62485 transitions. [2021-11-07 01:34:59,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:34:59,646 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 states have internal predecessors, (107), 0 states have call successors, (0), 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 85 [2021-11-07 01:34:59,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:34:59,706 INFO L225 Difference]: With dead ends: 34281 [2021-11-07 01:34:59,706 INFO L226 Difference]: Without dead ends: 20850 [2021-11-07 01:34:59,729 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:34:59,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20850 states. [2021-11-07 01:35:00,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20850 to 13695. [2021-11-07 01:35:00,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13695 states, 13683 states have (on average 1.8203610319374406) internal successors, (24908), 13694 states have internal predecessors, (24908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:00,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13695 states to 13695 states and 24908 transitions. [2021-11-07 01:35:00,777 INFO L78 Accepts]: Start accepts. Automaton has 13695 states and 24908 transitions. Word has length 85 [2021-11-07 01:35:00,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:35:00,778 INFO L470 AbstractCegarLoop]: Abstraction has 13695 states and 24908 transitions. [2021-11-07 01:35:00,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:00,778 INFO L276 IsEmpty]: Start isEmpty. Operand 13695 states and 24908 transitions. [2021-11-07 01:35:00,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-07 01:35:00,798 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:35:00,798 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:35:00,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:35:01,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:35:01,014 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:35:01,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:35:01,015 INFO L85 PathProgramCache]: Analyzing trace with hash -271289330, now seen corresponding path program 1 times [2021-11-07 01:35:01,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:35:01,015 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1885719528] [2021-11-07 01:35:01,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:35:01,016 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:35:01,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:35:01,017 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:35:01,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:35:01,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:35:01,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 573 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:35:01,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:35:02,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:35:02,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:35:02,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:35:02,435 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:35:02,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1885719528] [2021-11-07 01:35:02,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1885719528] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:35:02,435 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:35:02,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:35:02,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505746797] [2021-11-07 01:35:02,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:35:02,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:35:02,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:35:02,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:35:02,438 INFO L87 Difference]: Start difference. First operand 13695 states and 24908 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) 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 01:35:03,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:35:03,804 INFO L93 Difference]: Finished difference Result 40284 states and 73337 transitions. [2021-11-07 01:35:03,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:35:03,805 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) 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 85 [2021-11-07 01:35:03,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:35:03,883 INFO L225 Difference]: With dead ends: 40284 [2021-11-07 01:35:03,883 INFO L226 Difference]: Without dead ends: 26772 [2021-11-07 01:35:03,904 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:35:03,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26772 states. [2021-11-07 01:35:05,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26772 to 25793. [2021-11-07 01:35:05,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25793 states, 25781 states have (on average 1.8238625344245762) internal successors, (47021), 25792 states have internal predecessors, (47021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:05,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25793 states to 25793 states and 47021 transitions. [2021-11-07 01:35:05,403 INFO L78 Accepts]: Start accepts. Automaton has 25793 states and 47021 transitions. Word has length 85 [2021-11-07 01:35:05,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:35:05,403 INFO L470 AbstractCegarLoop]: Abstraction has 25793 states and 47021 transitions. [2021-11-07 01:35:05,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) 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 01:35:05,404 INFO L276 IsEmpty]: Start isEmpty. Operand 25793 states and 47021 transitions. [2021-11-07 01:35:05,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-07 01:35:05,425 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:35:05,426 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:35:05,450 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:35:05,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:35:05,642 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:35:05,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:35:05,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1529305394, now seen corresponding path program 1 times [2021-11-07 01:35:05,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:35:05,643 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1018265698] [2021-11-07 01:35:05,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:35:05,644 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:35:05,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:35:05,644 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:35:05,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:35:06,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:35:06,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 575 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:35:06,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:35:06,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:35:06,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:35:06,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:35:06,957 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:35:06,957 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1018265698] [2021-11-07 01:35:06,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1018265698] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:35:06,957 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:35:06,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:35:06,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918087032] [2021-11-07 01:35:06,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:35:06,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:35:06,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:35:06,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:35:06,960 INFO L87 Difference]: Start difference. First operand 25793 states and 47021 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:09,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:35:09,324 INFO L93 Difference]: Finished difference Result 71217 states and 129412 transitions. [2021-11-07 01:35:09,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:35:09,325 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 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 86 [2021-11-07 01:35:09,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:35:09,448 INFO L225 Difference]: With dead ends: 71217 [2021-11-07 01:35:09,449 INFO L226 Difference]: Without dead ends: 45654 [2021-11-07 01:35:09,474 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:35:09,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45654 states. [2021-11-07 01:35:12,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45654 to 44675. [2021-11-07 01:35:12,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44675 states, 44663 states have (on average 1.8137160513176456) internal successors, (81006), 44674 states have internal predecessors, (81006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:12,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44675 states to 44675 states and 81006 transitions. [2021-11-07 01:35:12,381 INFO L78 Accepts]: Start accepts. Automaton has 44675 states and 81006 transitions. Word has length 86 [2021-11-07 01:35:12,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:35:12,382 INFO L470 AbstractCegarLoop]: Abstraction has 44675 states and 81006 transitions. [2021-11-07 01:35:12,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:12,382 INFO L276 IsEmpty]: Start isEmpty. Operand 44675 states and 81006 transitions. [2021-11-07 01:35:12,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-07 01:35:12,398 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:35:12,398 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 01:35:12,415 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:35:12,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:35:12,600 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:35:12,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:35:12,601 INFO L85 PathProgramCache]: Analyzing trace with hash 57493877, now seen corresponding path program 1 times [2021-11-07 01:35:12,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:35:12,601 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [95201645] [2021-11-07 01:35:12,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:35:12,602 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:35:12,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:35:12,602 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:35:12,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 01:35:13,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:35:13,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:35:13,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:35:13,858 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:35:13,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:35:14,152 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:35:14,152 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:35:14,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [95201645] [2021-11-07 01:35:14,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [95201645] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:35:14,153 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:35:14,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:35:14,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444855698] [2021-11-07 01:35:14,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:35:14,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:35:14,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:35:14,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:35:14,155 INFO L87 Difference]: Start difference. First operand 44675 states and 81006 transitions. Second operand has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:22,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:35:22,428 INFO L93 Difference]: Finished difference Result 173968 states and 315325 transitions. [2021-11-07 01:35:22,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:35:22,429 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 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 87 [2021-11-07 01:35:22,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:35:22,765 INFO L225 Difference]: With dead ends: 173968 [2021-11-07 01:35:22,765 INFO L226 Difference]: Without dead ends: 129589 [2021-11-07 01:35:22,816 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:35:22,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129589 states. [2021-11-07 01:35:26,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129589 to 44417. [2021-11-07 01:35:26,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44417 states, 44405 states have (on average 1.8010133993919604) internal successors, (79974), 44416 states have internal predecessors, (79974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:26,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44417 states to 44417 states and 79974 transitions. [2021-11-07 01:35:26,544 INFO L78 Accepts]: Start accepts. Automaton has 44417 states and 79974 transitions. Word has length 87 [2021-11-07 01:35:26,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:35:26,544 INFO L470 AbstractCegarLoop]: Abstraction has 44417 states and 79974 transitions. [2021-11-07 01:35:26,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:26,545 INFO L276 IsEmpty]: Start isEmpty. Operand 44417 states and 79974 transitions. [2021-11-07 01:35:26,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-07 01:35:26,560 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:35:26,560 INFO L513 BasicCegarLoop]: trace histogram [3, 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] [2021-11-07 01:35:26,584 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:35:26,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:35:26,782 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:35:26,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:35:26,783 INFO L85 PathProgramCache]: Analyzing trace with hash -325508589, now seen corresponding path program 1 times [2021-11-07 01:35:26,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:35:26,783 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [622948236] [2021-11-07 01:35:26,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:35:26,784 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:35:26,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:35:26,785 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:35:26,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:35:27,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:35:27,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:35:27,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:35:27,984 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 01:35:27,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:35:28,194 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 01:35:28,194 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:35:28,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [622948236] [2021-11-07 01:35:28,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [622948236] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:35:28,195 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:35:28,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:35:28,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300768456] [2021-11-07 01:35:28,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:35:28,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:35:28,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:35:28,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:35:28,197 INFO L87 Difference]: Start difference. First operand 44417 states and 79974 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:30,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:35:30,792 INFO L93 Difference]: Finished difference Result 89511 states and 161080 transitions. [2021-11-07 01:35:30,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:35:30,792 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 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 87 [2021-11-07 01:35:30,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:35:30,866 INFO L225 Difference]: With dead ends: 89511 [2021-11-07 01:35:30,867 INFO L226 Difference]: Without dead ends: 45396 [2021-11-07 01:35:30,899 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:35:30,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45396 states. [2021-11-07 01:35:33,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45396 to 44417. [2021-11-07 01:35:33,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44417 states, 44405 states have (on average 1.7981308411214953) internal successors, (79846), 44416 states have internal predecessors, (79846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:33,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44417 states to 44417 states and 79846 transitions. [2021-11-07 01:35:33,641 INFO L78 Accepts]: Start accepts. Automaton has 44417 states and 79846 transitions. Word has length 87 [2021-11-07 01:35:33,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:35:33,642 INFO L470 AbstractCegarLoop]: Abstraction has 44417 states and 79846 transitions. [2021-11-07 01:35:33,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:35:33,642 INFO L276 IsEmpty]: Start isEmpty. Operand 44417 states and 79846 transitions. [2021-11-07 01:35:33,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-07 01:35:33,838 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:35:33,838 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:35:33,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:35:34,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:35:34,039 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2021-11-07 01:35:34,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:35:34,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1407610112, now seen corresponding path program 1 times [2021-11-07 01:35:34,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:35:34,040 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1222982468] [2021-11-07 01:35:34,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:35:34,040 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:35:34,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:35:34,042 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:35:34,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c8fd675-9acb-442e-bba2-28b29e988cc3/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 01:35:35,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:35:35,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:35:35,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:35:35,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:35:35,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:35:35,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:35:35,559 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:35:35,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1222982468] [2021-11-07 01:35:35,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1222982468] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:35:35,559 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:35:35,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:35:35,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367382817] [2021-11-07 01:35:35,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:35:35,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:35:35,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:35:35,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:35:35,562 INFO L87 Difference]: Start difference. First operand 44417 states and 79846 transitions. Second operand has 3 states, 3 states have (on average 29.0) 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)