./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec8_product14.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_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/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_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec8_product14.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/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_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/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 db5154a0e253326ecbc6009dd1b2954eaac96f88a97328f2e835902c9850ef53 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:40:10,708 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:40:10,710 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:40:10,739 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:40:10,740 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:40:10,741 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:40:10,743 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:40:10,745 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:40:10,747 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:40:10,748 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:40:10,749 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:40:10,751 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:40:10,751 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:40:10,753 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:40:10,754 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:40:10,756 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:40:10,757 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:40:10,758 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:40:10,760 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:40:10,763 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:40:10,765 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:40:10,767 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:40:10,768 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:40:10,769 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:40:10,773 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:40:10,773 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:40:10,774 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:40:10,775 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:40:10,775 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:40:10,776 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:40:10,777 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:40:10,778 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:40:10,779 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:40:10,780 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:40:10,781 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:40:10,781 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:40:10,782 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:40:10,783 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:40:10,783 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:40:10,784 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:40:10,785 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:40:10,786 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:40:10,811 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:40:10,811 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:40:10,812 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:40:10,812 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:40:10,813 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:40:10,813 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:40:10,813 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:40:10,814 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:40:10,814 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:40:10,814 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:40:10,814 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:40:10,815 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:40:10,815 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:40:10,815 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:40:10,816 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:40:10,816 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:40:10,817 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:40:10,817 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:40:10,817 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:40:10,817 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:40:10,818 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:40:10,818 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:40:10,818 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:40:10,818 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:40:10,819 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:40:10,819 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:40:10,819 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:40:10,820 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:40:10,820 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:40:10,820 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:40:10,820 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:40:10,821 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:40:10,821 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:40:10,821 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:40:10,821 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:40:10,822 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:40:10,822 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:40:10,822 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:40:10,822 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:40:10,823 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_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> db5154a0e253326ecbc6009dd1b2954eaac96f88a97328f2e835902c9850ef53 [2021-11-07 01:40:11,063 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:40:11,084 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:40:11,086 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:40:11,088 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:40:11,088 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:40:11,089 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec8_product14.cil.c [2021-11-07 01:40:11,152 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/data/aca97dbd3/5d009815e0334bdda3a4074514b03ee6/FLAGa9fdcd6f5 [2021-11-07 01:40:11,757 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:40:11,759 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/sv-benchmarks/c/product-lines/email_spec8_product14.cil.c [2021-11-07 01:40:11,796 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/data/aca97dbd3/5d009815e0334bdda3a4074514b03ee6/FLAGa9fdcd6f5 [2021-11-07 01:40:11,980 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/data/aca97dbd3/5d009815e0334bdda3a4074514b03ee6 [2021-11-07 01:40:11,983 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:40:11,984 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:40:11,986 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:40:11,986 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:40:11,989 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:40:11,990 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:40:11" (1/1) ... [2021-11-07 01:40:11,991 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@174e6fe8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:40:11, skipping insertion in model container [2021-11-07 01:40:11,991 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:40:11" (1/1) ... [2021-11-07 01:40:11,998 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:40:12,066 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:40:12,544 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_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/sv-benchmarks/c/product-lines/email_spec8_product14.cil.c[17564,17577] [2021-11-07 01:40:12,750 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:40:12,768 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 01:40:12,768 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5fa2ec1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:40:12, skipping insertion in model container [2021-11-07 01:40:12,769 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:40:12,769 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:40:12,771 INFO L168 Benchmark]: Toolchain (without parser) took 785.67 ms. Allocated memory is still 100.7 MB. Free memory was 67.0 MB in the beginning and 63.2 MB in the end (delta: 3.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-07 01:40:12,773 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 79.7 MB. Free memory is still 38.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:40:12,774 INFO L168 Benchmark]: CACSL2BoogieTranslator took 783.28 ms. Allocated memory is still 100.7 MB. Free memory was 66.8 MB in the beginning and 63.2 MB in the end (delta: 3.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-07 01:40:12,776 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 79.7 MB. Free memory is still 38.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 783.28 ms. Allocated memory is still 100.7 MB. Free memory was 66.8 MB in the beginning and 63.2 MB in the end (delta: 3.6 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: 77]: 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_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/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_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec8_product14.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/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_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/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 db5154a0e253326ecbc6009dd1b2954eaac96f88a97328f2e835902c9850ef53 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:40:15,123 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:40:15,127 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:40:15,185 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:40:15,186 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:40:15,191 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:40:15,193 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:40:15,202 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:40:15,206 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:40:15,214 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:40:15,216 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:40:15,218 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:40:15,218 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:40:15,222 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:40:15,224 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:40:15,229 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:40:15,230 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:40:15,231 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:40:15,232 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:40:15,234 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:40:15,236 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:40:15,238 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:40:15,242 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:40:15,244 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:40:15,251 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:40:15,257 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:40:15,258 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:40:15,259 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:40:15,261 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:40:15,263 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:40:15,263 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:40:15,264 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:40:15,267 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:40:15,268 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:40:15,270 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:40:15,270 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:40:15,271 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:40:15,272 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:40:15,272 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:40:15,274 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:40:15,275 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:40:15,281 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:40:15,330 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:40:15,330 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:40:15,332 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:40:15,333 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:40:15,333 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:40:15,333 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:40:15,333 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:40:15,334 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:40:15,335 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:40:15,336 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:40:15,338 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:40:15,338 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:40:15,338 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:40:15,338 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:40:15,339 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:40:15,339 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:40:15,339 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:40:15,339 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:40:15,340 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:40:15,340 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:40:15,340 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:40:15,340 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:40:15,341 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:40:15,341 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:40:15,341 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:40:15,341 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:40:15,342 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:40:15,342 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:40:15,342 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:40:15,342 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:40:15,343 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:40:15,343 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:40:15,343 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:40:15,343 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:40:15,344 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:40:15,344 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_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> db5154a0e253326ecbc6009dd1b2954eaac96f88a97328f2e835902c9850ef53 [2021-11-07 01:40:15,781 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:40:15,805 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:40:15,808 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:40:15,810 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:40:15,810 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:40:15,812 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec8_product14.cil.c [2021-11-07 01:40:15,904 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/data/b662edda3/2ad5b3c4fa1542c4b9b86fa694f449da/FLAGe66cf0a14 [2021-11-07 01:40:16,699 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:40:16,699 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/sv-benchmarks/c/product-lines/email_spec8_product14.cil.c [2021-11-07 01:40:16,724 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/data/b662edda3/2ad5b3c4fa1542c4b9b86fa694f449da/FLAGe66cf0a14 [2021-11-07 01:40:16,861 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/data/b662edda3/2ad5b3c4fa1542c4b9b86fa694f449da [2021-11-07 01:40:16,864 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:40:16,865 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:40:16,867 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:40:16,867 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:40:16,877 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:40:16,878 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:40:16" (1/1) ... [2021-11-07 01:40:16,881 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c34df39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:40:16, skipping insertion in model container [2021-11-07 01:40:16,881 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:40:16" (1/1) ... [2021-11-07 01:40:16,889 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:40:16,966 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:40:17,320 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_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/sv-benchmarks/c/product-lines/email_spec8_product14.cil.c[17564,17577] [2021-11-07 01:40:17,591 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:40:17,606 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:40:17,629 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:40:17,659 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_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/sv-benchmarks/c/product-lines/email_spec8_product14.cil.c[17564,17577] [2021-11-07 01:40:17,713 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:40:17,720 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:40:17,764 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_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/sv-benchmarks/c/product-lines/email_spec8_product14.cil.c[17564,17577] [2021-11-07 01:40:17,823 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:40:17,871 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:40:17,872 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:40:17 WrapperNode [2021-11-07 01:40:17,872 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:40:17,873 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:40:17,873 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:40:17,874 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:40:17,881 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:40:17" (1/1) ... [2021-11-07 01:40:17,953 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:40:17" (1/1) ... [2021-11-07 01:40:18,094 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:40:18,094 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:40:18,095 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:40:18,095 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:40:18,104 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:40:17" (1/1) ... [2021-11-07 01:40:18,104 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:40:17" (1/1) ... [2021-11-07 01:40:18,114 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:40:17" (1/1) ... [2021-11-07 01:40:18,115 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:40:17" (1/1) ... [2021-11-07 01:40:18,224 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:40:17" (1/1) ... [2021-11-07 01:40:18,291 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:40:17" (1/1) ... [2021-11-07 01:40:18,306 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:40:17" (1/1) ... [2021-11-07 01:40:18,338 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:40:18,340 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:40:18,343 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:40:18,343 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:40:18,344 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:40:17" (1/1) ... [2021-11-07 01:40:18,352 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:40:18,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:40:18,381 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:40:18,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:40:18,436 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 01:40:18,436 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:40:18,437 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:40:18,437 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:40:18,437 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:40:24,191 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:40:24,196 INFO L299 CfgBuilder]: Removed 465 assume(true) statements. [2021-11-07 01:40:24,201 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:40:24 BoogieIcfgContainer [2021-11-07 01:40:24,201 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:40:24,204 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:40:24,204 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:40:24,207 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:40:24,208 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:40:16" (1/3) ... [2021-11-07 01:40:24,209 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@109cb486 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:40:24, skipping insertion in model container [2021-11-07 01:40:24,209 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:40:17" (2/3) ... [2021-11-07 01:40:24,210 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@109cb486 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:40:24, skipping insertion in model container [2021-11-07 01:40:24,210 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:40:24" (3/3) ... [2021-11-07 01:40:24,212 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec8_product14.cil.c [2021-11-07 01:40:24,219 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:40:24,219 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-11-07 01:40:24,288 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:40:24,297 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 01:40:24,297 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-11-07 01:40:24,334 INFO L276 IsEmpty]: Start isEmpty. Operand has 766 states, 759 states have (on average 1.769433465085639) internal successors, (1343), 765 states have internal predecessors, (1343), 0 states have call successors, (0), 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 01:40:24,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-07 01:40:24,350 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:40:24,351 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:40:24,351 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:40:24,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:40:24,357 INFO L85 PathProgramCache]: Analyzing trace with hash 70871394, now seen corresponding path program 1 times [2021-11-07 01:40:24,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:40:24,373 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [894643938] [2021-11-07 01:40:24,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:24,374 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:40:24,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:40:24,377 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:40:24,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:40:24,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:24,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:40:24,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:25,044 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 01:40:25,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:25,187 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 01:40:25,188 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:40:25,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [894643938] [2021-11-07 01:40:25,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [894643938] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:40:25,189 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:40:25,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:40:25,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265849348] [2021-11-07 01:40:25,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:40:25,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:40:25,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:40:25,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:40:25,222 INFO L87 Difference]: Start difference. First operand has 766 states, 759 states have (on average 1.769433465085639) internal successors, (1343), 765 states have internal predecessors, (1343), 0 states have call successors, (0), 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 22.0) internal successors, (44), 2 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:25,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:40:25,302 INFO L93 Difference]: Finished difference Result 1251 states and 2170 transitions. [2021-11-07 01:40:25,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:40:25,303 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 22.0) internal successors, (44), 2 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-07 01:40:25,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:40:25,330 INFO L225 Difference]: With dead ends: 1251 [2021-11-07 01:40:25,336 INFO L226 Difference]: Without dead ends: 702 [2021-11-07 01:40:25,346 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 86 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 01:40:25,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2021-11-07 01:40:25,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 702. [2021-11-07 01:40:25,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 702 states, 696 states have (on average 1.7614942528735633) internal successors, (1226), 701 states have internal predecessors, (1226), 0 states have call successors, (0), 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 01:40:25,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 702 states to 702 states and 1226 transitions. [2021-11-07 01:40:25,464 INFO L78 Accepts]: Start accepts. Automaton has 702 states and 1226 transitions. Word has length 44 [2021-11-07 01:40:25,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:40:25,465 INFO L470 AbstractCegarLoop]: Abstraction has 702 states and 1226 transitions. [2021-11-07 01:40:25,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 22.0) internal successors, (44), 2 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:25,465 INFO L276 IsEmpty]: Start isEmpty. Operand 702 states and 1226 transitions. [2021-11-07 01:40:25,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-07 01:40:25,476 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:40:25,476 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:40:25,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:40:25,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:40:25,688 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:40:25,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:40:25,689 INFO L85 PathProgramCache]: Analyzing trace with hash -758967793, now seen corresponding path program 1 times [2021-11-07 01:40:25,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:40:25,690 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [163459647] [2021-11-07 01:40:25,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:25,691 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:40:25,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:40:25,692 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:40:25,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:40:26,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:26,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:40:26,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:26,225 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 01:40:26,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:26,416 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 01:40:26,416 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:40:26,417 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [163459647] [2021-11-07 01:40:26,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [163459647] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:40:26,417 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:40:26,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:40:26,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057440865] [2021-11-07 01:40:26,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:40:26,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:40:26,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:40:26,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:40:26,421 INFO L87 Difference]: Start difference. First operand 702 states and 1226 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:26,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:40:26,572 INFO L93 Difference]: Finished difference Result 2076 states and 3630 transitions. [2021-11-07 01:40:26,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:40:26,573 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-07 01:40:26,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:40:26,587 INFO L225 Difference]: With dead ends: 2076 [2021-11-07 01:40:26,587 INFO L226 Difference]: Without dead ends: 1389 [2021-11-07 01:40:26,590 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 86 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 01:40:26,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1389 states. [2021-11-07 01:40:26,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1389 to 701. [2021-11-07 01:40:26,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 701 states, 695 states have (on average 1.7568345323741008) internal successors, (1221), 700 states have internal predecessors, (1221), 0 states have call successors, (0), 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 01:40:26,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 701 states to 701 states and 1221 transitions. [2021-11-07 01:40:26,656 INFO L78 Accepts]: Start accepts. Automaton has 701 states and 1221 transitions. Word has length 45 [2021-11-07 01:40:26,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:40:26,658 INFO L470 AbstractCegarLoop]: Abstraction has 701 states and 1221 transitions. [2021-11-07 01:40:26,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:26,659 INFO L276 IsEmpty]: Start isEmpty. Operand 701 states and 1221 transitions. [2021-11-07 01:40:26,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-07 01:40:26,671 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:40:26,671 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:40:26,691 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:40:26,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:40:26,886 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:40:26,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:40:26,887 INFO L85 PathProgramCache]: Analyzing trace with hash 339957877, now seen corresponding path program 1 times [2021-11-07 01:40:26,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:40:26,888 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1448399083] [2021-11-07 01:40:26,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:26,889 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:40:26,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:40:26,890 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:40:26,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:40:27,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:27,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:40:27,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:27,511 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 01:40:27,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:27,701 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 01:40:27,701 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:40:27,701 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1448399083] [2021-11-07 01:40:27,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1448399083] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:40:27,702 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:40:27,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:40:27,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347749886] [2021-11-07 01:40:27,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:40:27,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:40:27,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:40:27,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:40:27,711 INFO L87 Difference]: Start difference. First operand 701 states and 1221 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 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 01:40:28,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:40:28,033 INFO L93 Difference]: Finished difference Result 2721 states and 4746 transitions. [2021-11-07 01:40:28,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:40:28,034 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-07 01:40:28,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:40:28,048 INFO L225 Difference]: With dead ends: 2721 [2021-11-07 01:40:28,048 INFO L226 Difference]: Without dead ends: 2038 [2021-11-07 01:40:28,050 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 88 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 01:40:28,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2038 states. [2021-11-07 01:40:28,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2038 to 700. [2021-11-07 01:40:28,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 700 states, 694 states have (on average 1.7536023054755043) internal successors, (1217), 699 states have internal predecessors, (1217), 0 states have call successors, (0), 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 01:40:28,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 1217 transitions. [2021-11-07 01:40:28,116 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 1217 transitions. Word has length 47 [2021-11-07 01:40:28,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:40:28,116 INFO L470 AbstractCegarLoop]: Abstraction has 700 states and 1217 transitions. [2021-11-07 01:40:28,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 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 01:40:28,118 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 1217 transitions. [2021-11-07 01:40:28,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-07 01:40:28,121 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:40:28,121 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] [2021-11-07 01:40:28,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:40:28,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:40:28,341 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:40:28,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:40:28,341 INFO L85 PathProgramCache]: Analyzing trace with hash -572142200, now seen corresponding path program 1 times [2021-11-07 01:40:28,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:40:28,342 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1294590031] [2021-11-07 01:40:28,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:28,343 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:40:28,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:40:28,347 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:40:28,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:40:28,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:28,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:40:28,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:28,891 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 01:40:28,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:29,031 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 01:40:29,032 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:40:29,032 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1294590031] [2021-11-07 01:40:29,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1294590031] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:40:29,032 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:40:29,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:40:29,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132444658] [2021-11-07 01:40:29,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:40:29,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:40:29,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:40:29,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:40:29,034 INFO L87 Difference]: Start difference. First operand 700 states and 1217 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 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 01:40:29,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:40:29,116 INFO L93 Difference]: Finished difference Result 1397 states and 2431 transitions. [2021-11-07 01:40:29,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:40:29,117 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 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 48 [2021-11-07 01:40:29,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:40:29,122 INFO L225 Difference]: With dead ends: 1397 [2021-11-07 01:40:29,122 INFO L226 Difference]: Without dead ends: 705 [2021-11-07 01:40:29,123 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 92 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 01:40:29,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2021-11-07 01:40:29,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 700. [2021-11-07 01:40:29,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 700 states, 694 states have (on average 1.7492795389048992) internal successors, (1214), 699 states have internal predecessors, (1214), 0 states have call successors, (0), 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 01:40:29,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 1214 transitions. [2021-11-07 01:40:29,174 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 1214 transitions. Word has length 48 [2021-11-07 01:40:29,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:40:29,174 INFO L470 AbstractCegarLoop]: Abstraction has 700 states and 1214 transitions. [2021-11-07 01:40:29,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 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 01:40:29,175 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 1214 transitions. [2021-11-07 01:40:29,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-07 01:40:29,178 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:40:29,178 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] [2021-11-07 01:40:29,197 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:40:29,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:40:29,398 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:40:29,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:40:29,398 INFO L85 PathProgramCache]: Analyzing trace with hash 455771997, now seen corresponding path program 1 times [2021-11-07 01:40:29,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:40:29,399 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [60599679] [2021-11-07 01:40:29,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:29,400 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:40:29,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:40:29,401 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:40:29,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:40:29,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:29,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:40:29,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:30,030 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 01:40:30,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:30,175 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 01:40:30,175 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:40:30,175 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [60599679] [2021-11-07 01:40:30,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [60599679] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:40:30,176 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:40:30,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:40:30,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076347812] [2021-11-07 01:40:30,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:40:30,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:40:30,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:40:30,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:40:30,178 INFO L87 Difference]: Start difference. First operand 700 states and 1214 transitions. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 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 01:40:30,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:40:30,515 INFO L93 Difference]: Finished difference Result 2708 states and 4722 transitions. [2021-11-07 01:40:30,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:40:30,516 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 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 49 [2021-11-07 01:40:30,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:40:30,531 INFO L225 Difference]: With dead ends: 2708 [2021-11-07 01:40:30,531 INFO L226 Difference]: Without dead ends: 2034 [2021-11-07 01:40:30,533 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 92 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 01:40:30,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2034 states. [2021-11-07 01:40:30,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2034 to 700. [2021-11-07 01:40:30,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 700 states, 694 states have (on average 1.744956772334294) internal successors, (1211), 699 states have internal predecessors, (1211), 0 states have call successors, (0), 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 01:40:30,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 1211 transitions. [2021-11-07 01:40:30,606 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 1211 transitions. Word has length 49 [2021-11-07 01:40:30,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:40:30,606 INFO L470 AbstractCegarLoop]: Abstraction has 700 states and 1211 transitions. [2021-11-07 01:40:30,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 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 01:40:30,607 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 1211 transitions. [2021-11-07 01:40:30,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-07 01:40:30,608 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:40:30,609 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] [2021-11-07 01:40:30,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:40:30,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:40:30,823 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:40:30,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:40:30,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1266463272, now seen corresponding path program 1 times [2021-11-07 01:40:30,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:40:30,824 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [904658427] [2021-11-07 01:40:30,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:30,825 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:40:30,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:40:30,826 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:40:30,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:40:31,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:31,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:40:31,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:31,365 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 01:40:31,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:31,509 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 01:40:31,510 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:40:31,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [904658427] [2021-11-07 01:40:31,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [904658427] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:40:31,510 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:40:31,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:40:31,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624510193] [2021-11-07 01:40:31,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:40:31,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:40:31,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:40:31,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:40:31,512 INFO L87 Difference]: Start difference. First operand 700 states and 1211 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 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 01:40:31,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:40:31,636 INFO L93 Difference]: Finished difference Result 1795 states and 3105 transitions. [2021-11-07 01:40:31,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:40:31,637 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 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 51 [2021-11-07 01:40:31,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:40:31,647 INFO L225 Difference]: With dead ends: 1795 [2021-11-07 01:40:31,647 INFO L226 Difference]: Without dead ends: 1374 [2021-11-07 01:40:31,649 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 98 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 01:40:31,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1374 states. [2021-11-07 01:40:31,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1374 to 953. [2021-11-07 01:40:31,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 953 states, 947 states have (on average 1.770855332629356) internal successors, (1677), 952 states have internal predecessors, (1677), 0 states have call successors, (0), 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 01:40:31,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 953 states to 953 states and 1677 transitions. [2021-11-07 01:40:31,752 INFO L78 Accepts]: Start accepts. Automaton has 953 states and 1677 transitions. Word has length 51 [2021-11-07 01:40:31,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:40:31,752 INFO L470 AbstractCegarLoop]: Abstraction has 953 states and 1677 transitions. [2021-11-07 01:40:31,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 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 01:40:31,753 INFO L276 IsEmpty]: Start isEmpty. Operand 953 states and 1677 transitions. [2021-11-07 01:40:31,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-07 01:40:31,755 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:40:31,755 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 01:40:31,773 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:40:31,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:40:31,975 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:40:31,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:40:31,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1487574921, now seen corresponding path program 1 times [2021-11-07 01:40:31,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:40:31,976 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1384697244] [2021-11-07 01:40:31,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:31,976 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:40:31,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:40:31,977 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:40:31,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:40:32,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:32,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:40:32,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:32,524 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 01:40:32,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:32,656 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 01:40:32,657 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:40:32,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1384697244] [2021-11-07 01:40:32,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1384697244] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:40:32,657 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:40:32,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:40:32,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612414794] [2021-11-07 01:40:32,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:40:32,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:40:32,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:40:32,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:40:32,659 INFO L87 Difference]: Start difference. First operand 953 states and 1677 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 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 01:40:32,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:40:32,797 INFO L93 Difference]: Finished difference Result 2444 states and 4304 transitions. [2021-11-07 01:40:32,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:40:32,798 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 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 63 [2021-11-07 01:40:32,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:40:32,807 INFO L225 Difference]: With dead ends: 2444 [2021-11-07 01:40:32,808 INFO L226 Difference]: Without dead ends: 1575 [2021-11-07 01:40:32,809 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 123 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 01:40:32,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1575 states. [2021-11-07 01:40:32,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1575 to 1154. [2021-11-07 01:40:32,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1154 states, 1148 states have (on average 1.7822299651567943) internal successors, (2046), 1153 states have internal predecessors, (2046), 0 states have call successors, (0), 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 01:40:32,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1154 states to 1154 states and 2046 transitions. [2021-11-07 01:40:32,908 INFO L78 Accepts]: Start accepts. Automaton has 1154 states and 2046 transitions. Word has length 63 [2021-11-07 01:40:32,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:40:32,908 INFO L470 AbstractCegarLoop]: Abstraction has 1154 states and 2046 transitions. [2021-11-07 01:40:32,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 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 01:40:32,909 INFO L276 IsEmpty]: Start isEmpty. Operand 1154 states and 2046 transitions. [2021-11-07 01:40:32,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 01:40:32,911 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:40:32,911 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 01:40:32,926 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:40:33,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:40:33,127 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:40:33,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:40:33,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1362015080, now seen corresponding path program 1 times [2021-11-07 01:40:33,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:40:33,128 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1882726060] [2021-11-07 01:40:33,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:33,129 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:40:33,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:40:33,132 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:40:33,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:40:33,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:33,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:40:33,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:33,789 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 01:40:33,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:33,929 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 01:40:33,929 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:40:33,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1882726060] [2021-11-07 01:40:33,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1882726060] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:40:33,929 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:40:33,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:40:33,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491033308] [2021-11-07 01:40:33,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:40:33,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:40:33,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:40:33,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:40:33,931 INFO L87 Difference]: Start difference. First operand 1154 states and 2046 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 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 01:40:34,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:40:34,104 INFO L93 Difference]: Finished difference Result 3091 states and 5497 transitions. [2021-11-07 01:40:34,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:40:34,105 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 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 01:40:34,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:40:34,117 INFO L225 Difference]: With dead ends: 3091 [2021-11-07 01:40:34,118 INFO L226 Difference]: Without dead ends: 2025 [2021-11-07 01:40:34,120 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 125 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 01:40:34,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2025 states. [2021-11-07 01:40:34,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2025 to 1604. [2021-11-07 01:40:34,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1604 states, 1598 states have (on average 1.7984981226533165) internal successors, (2874), 1603 states have internal predecessors, (2874), 0 states have call successors, (0), 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 01:40:34,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1604 states to 1604 states and 2874 transitions. [2021-11-07 01:40:34,234 INFO L78 Accepts]: Start accepts. Automaton has 1604 states and 2874 transitions. Word has length 64 [2021-11-07 01:40:34,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:40:34,235 INFO L470 AbstractCegarLoop]: Abstraction has 1604 states and 2874 transitions. [2021-11-07 01:40:34,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 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 01:40:34,235 INFO L276 IsEmpty]: Start isEmpty. Operand 1604 states and 2874 transitions. [2021-11-07 01:40:34,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 01:40:34,252 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:40:34,253 INFO L513 BasicCegarLoop]: trace histogram [3, 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] [2021-11-07 01:40:34,275 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:40:34,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:40:34,468 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:40:34,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:40:34,468 INFO L85 PathProgramCache]: Analyzing trace with hash -213368008, now seen corresponding path program 1 times [2021-11-07 01:40:34,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:40:34,469 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1915008617] [2021-11-07 01:40:34,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:34,469 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:40:34,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:40:34,470 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:40:34,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:40:34,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:34,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:40:34,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:35,064 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:40:35,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:35,213 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:40:35,213 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:40:35,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1915008617] [2021-11-07 01:40:35,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1915008617] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:40:35,214 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:40:35,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:40:35,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340637806] [2021-11-07 01:40:35,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:40:35,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:40:35,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:40:35,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:40:35,215 INFO L87 Difference]: Start difference. First operand 1604 states and 2874 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:35,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:40:35,374 INFO L93 Difference]: Finished difference Result 3344 states and 5960 transitions. [2021-11-07 01:40:35,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:40:35,374 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-07 01:40:35,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:40:35,387 INFO L225 Difference]: With dead ends: 3344 [2021-11-07 01:40:35,387 INFO L226 Difference]: Without dead ends: 2025 [2021-11-07 01:40:35,391 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 126 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 01:40:35,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2025 states. [2021-11-07 01:40:35,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2025 to 1604. [2021-11-07 01:40:35,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1604 states, 1598 states have (on average 1.7972465581977473) internal successors, (2872), 1603 states have internal predecessors, (2872), 0 states have call successors, (0), 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 01:40:35,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1604 states to 1604 states and 2872 transitions. [2021-11-07 01:40:35,524 INFO L78 Accepts]: Start accepts. Automaton has 1604 states and 2872 transitions. Word has length 65 [2021-11-07 01:40:35,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:40:35,524 INFO L470 AbstractCegarLoop]: Abstraction has 1604 states and 2872 transitions. [2021-11-07 01:40:35,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:35,525 INFO L276 IsEmpty]: Start isEmpty. Operand 1604 states and 2872 transitions. [2021-11-07 01:40:35,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 01:40:35,528 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:40:35,528 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:40:35,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:40:35,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:40:35,747 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:40:35,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:40:35,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1827881911, now seen corresponding path program 1 times [2021-11-07 01:40:35,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:40:35,749 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1902318571] [2021-11-07 01:40:35,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:35,749 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:40:35,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:40:35,750 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:40:35,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:40:36,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:36,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:40:36,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:36,359 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 01:40:36,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:36,507 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 01:40:36,508 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:40:36,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1902318571] [2021-11-07 01:40:36,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1902318571] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:40:36,508 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:40:36,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:40:36,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053696001] [2021-11-07 01:40:36,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:40:36,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:40:36,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:40:36,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:40:36,510 INFO L87 Difference]: Start difference. First operand 1604 states and 2872 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:36,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:40:36,686 INFO L93 Difference]: Finished difference Result 4413 states and 7930 transitions. [2021-11-07 01:40:36,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:40:36,686 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-07 01:40:36,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:40:36,704 INFO L225 Difference]: With dead ends: 4413 [2021-11-07 01:40:36,704 INFO L226 Difference]: Without dead ends: 2905 [2021-11-07 01:40:36,707 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:40:36,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2905 states. [2021-11-07 01:40:36,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2905 to 2484. [2021-11-07 01:40:36,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2484 states, 2478 states have (on average 1.8123486682808716) internal successors, (4491), 2483 states have internal predecessors, (4491), 0 states have call successors, (0), 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 01:40:36,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2484 states to 2484 states and 4491 transitions. [2021-11-07 01:40:36,879 INFO L78 Accepts]: Start accepts. Automaton has 2484 states and 4491 transitions. Word has length 65 [2021-11-07 01:40:36,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:40:36,880 INFO L470 AbstractCegarLoop]: Abstraction has 2484 states and 4491 transitions. [2021-11-07 01:40:36,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:36,881 INFO L276 IsEmpty]: Start isEmpty. Operand 2484 states and 4491 transitions. [2021-11-07 01:40:36,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 01:40:36,891 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:40:36,891 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:40:36,911 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:40:37,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:40:37,105 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:40:37,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:40:37,105 INFO L85 PathProgramCache]: Analyzing trace with hash -2075626966, now seen corresponding path program 1 times [2021-11-07 01:40:37,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:40:37,106 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [242344400] [2021-11-07 01:40:37,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:37,106 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:40:37,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:40:37,107 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:40:37,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:40:37,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:37,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:40:37,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:37,712 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 01:40:37,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:37,839 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 01:40:37,839 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:40:37,839 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [242344400] [2021-11-07 01:40:37,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [242344400] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:40:37,840 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:40:37,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:40:37,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404631287] [2021-11-07 01:40:37,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:40:37,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:40:37,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:40:37,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:40:37,842 INFO L87 Difference]: Start difference. First operand 2484 states and 4491 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:38,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:40:38,125 INFO L93 Difference]: Finished difference Result 6789 states and 12306 transitions. [2021-11-07 01:40:38,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:40:38,126 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-07 01:40:38,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:40:38,155 INFO L225 Difference]: With dead ends: 6789 [2021-11-07 01:40:38,155 INFO L226 Difference]: Without dead ends: 4435 [2021-11-07 01:40:38,159 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:40:38,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4435 states. [2021-11-07 01:40:38,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4435 to 4014. [2021-11-07 01:40:38,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4014 states, 4008 states have (on average 1.8223552894211577) internal successors, (7304), 4013 states have internal predecessors, (7304), 0 states have call successors, (0), 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 01:40:38,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4014 states to 4014 states and 7304 transitions. [2021-11-07 01:40:38,450 INFO L78 Accepts]: Start accepts. Automaton has 4014 states and 7304 transitions. Word has length 66 [2021-11-07 01:40:38,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:40:38,451 INFO L470 AbstractCegarLoop]: Abstraction has 4014 states and 7304 transitions. [2021-11-07 01:40:38,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:38,451 INFO L276 IsEmpty]: Start isEmpty. Operand 4014 states and 7304 transitions. [2021-11-07 01:40:38,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 01:40:38,456 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:40:38,457 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 01:40:38,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:40:38,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:40:38,671 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:40:38,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:40:38,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1657566280, now seen corresponding path program 1 times [2021-11-07 01:40:38,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:40:38,673 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [646050237] [2021-11-07 01:40:38,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:38,673 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:40:38,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:40:38,674 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:40:38,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:40:39,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:39,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:40:39,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:39,381 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 01:40:39,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:39,538 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 01:40:39,538 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:40:39,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [646050237] [2021-11-07 01:40:39,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [646050237] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:40:39,538 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:40:39,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:40:39,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722343050] [2021-11-07 01:40:39,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:40:39,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:40:39,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:40:39,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:40:39,540 INFO L87 Difference]: Start difference. First operand 4014 states and 7304 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 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 01:40:39,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:40:39,977 INFO L93 Difference]: Finished difference Result 11095 states and 20228 transitions. [2021-11-07 01:40:39,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:40:39,977 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 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 67 [2021-11-07 01:40:39,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:40:40,014 INFO L225 Difference]: With dead ends: 11095 [2021-11-07 01:40:40,014 INFO L226 Difference]: Without dead ends: 7245 [2021-11-07 01:40:40,019 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 131 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 01:40:40,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7245 states. [2021-11-07 01:40:40,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7245 to 6824. [2021-11-07 01:40:40,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6824 states, 6818 states have (on average 1.828248753300088) internal successors, (12465), 6823 states have internal predecessors, (12465), 0 states have call successors, (0), 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 01:40:40,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6824 states to 6824 states and 12465 transitions. [2021-11-07 01:40:40,537 INFO L78 Accepts]: Start accepts. Automaton has 6824 states and 12465 transitions. Word has length 67 [2021-11-07 01:40:40,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:40:40,537 INFO L470 AbstractCegarLoop]: Abstraction has 6824 states and 12465 transitions. [2021-11-07 01:40:40,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 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 01:40:40,537 INFO L276 IsEmpty]: Start isEmpty. Operand 6824 states and 12465 transitions. [2021-11-07 01:40:40,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 01:40:40,543 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:40:40,544 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] [2021-11-07 01:40:40,561 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-11-07 01:40:40,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:40:40,758 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:40:40,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:40:40,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1916756108, now seen corresponding path program 1 times [2021-11-07 01:40:40,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:40:40,759 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [383948390] [2021-11-07 01:40:40,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:40,760 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:40:40,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:40:40,760 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:40:40,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:40:41,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:41,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:40:41,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:41,568 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 01:40:41,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:41,759 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 01:40:41,759 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:40:41,759 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [383948390] [2021-11-07 01:40:41,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [383948390] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:40:41,759 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:40:41,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:40:41,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049991392] [2021-11-07 01:40:41,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:40:41,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:40:41,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:40:41,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:40:41,761 INFO L87 Difference]: Start difference. First operand 6824 states and 12465 transitions. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 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 01:40:44,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:40:44,948 INFO L93 Difference]: Finished difference Result 25819 states and 47216 transitions. [2021-11-07 01:40:44,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:40:44,949 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 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 68 [2021-11-07 01:40:44,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:40:45,015 INFO L225 Difference]: With dead ends: 25819 [2021-11-07 01:40:45,015 INFO L226 Difference]: Without dead ends: 19278 [2021-11-07 01:40:45,027 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 130 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 01:40:45,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19278 states. [2021-11-07 01:40:45,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19278 to 6774. [2021-11-07 01:40:45,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6774 states, 6768 states have (on average 1.8122044917257683) internal successors, (12265), 6773 states have internal predecessors, (12265), 0 states have call successors, (0), 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 01:40:45,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6774 states to 6774 states and 12265 transitions. [2021-11-07 01:40:45,712 INFO L78 Accepts]: Start accepts. Automaton has 6774 states and 12265 transitions. Word has length 68 [2021-11-07 01:40:45,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:40:45,713 INFO L470 AbstractCegarLoop]: Abstraction has 6774 states and 12265 transitions. [2021-11-07 01:40:45,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 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 01:40:45,714 INFO L276 IsEmpty]: Start isEmpty. Operand 6774 states and 12265 transitions. [2021-11-07 01:40:45,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 01:40:45,720 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:40:45,720 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] [2021-11-07 01:40:45,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:40:45,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:40:45,940 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:40:45,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:40:45,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1256566565, now seen corresponding path program 1 times [2021-11-07 01:40:45,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:40:45,941 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1626991865] [2021-11-07 01:40:45,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:45,941 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:40:45,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:40:45,942 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:40:45,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:40:46,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:46,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:40:46,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:46,709 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 01:40:46,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:46,869 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 01:40:46,869 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:40:46,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1626991865] [2021-11-07 01:40:46,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1626991865] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:40:46,869 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:40:46,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:40:46,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002118295] [2021-11-07 01:40:46,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:40:46,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:40:46,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:40:46,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:40:46,871 INFO L87 Difference]: Start difference. First operand 6774 states and 12265 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 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 01:40:47,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:40:47,382 INFO L93 Difference]: Finished difference Result 19836 states and 35965 transitions. [2021-11-07 01:40:47,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:40:47,383 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 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 68 [2021-11-07 01:40:47,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:40:47,423 INFO L225 Difference]: With dead ends: 19836 [2021-11-07 01:40:47,423 INFO L226 Difference]: Without dead ends: 13229 [2021-11-07 01:40:47,433 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 133 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 01:40:47,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13229 states. [2021-11-07 01:40:48,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13229 to 12808. [2021-11-07 01:40:48,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12808 states, 12802 states have (on average 1.814247773785346) internal successors, (23226), 12807 states have internal predecessors, (23226), 0 states have call successors, (0), 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 01:40:48,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12808 states to 12808 states and 23226 transitions. [2021-11-07 01:40:48,237 INFO L78 Accepts]: Start accepts. Automaton has 12808 states and 23226 transitions. Word has length 68 [2021-11-07 01:40:48,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:40:48,238 INFO L470 AbstractCegarLoop]: Abstraction has 12808 states and 23226 transitions. [2021-11-07 01:40:48,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 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 01:40:48,238 INFO L276 IsEmpty]: Start isEmpty. Operand 12808 states and 23226 transitions. [2021-11-07 01:40:48,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 01:40:48,246 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:40:48,246 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] [2021-11-07 01:40:48,276 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:40:48,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:40:48,460 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:40:48,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:40:48,461 INFO L85 PathProgramCache]: Analyzing trace with hash -127955705, now seen corresponding path program 1 times [2021-11-07 01:40:48,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:40:48,461 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2144593038] [2021-11-07 01:40:48,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:48,462 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:40:48,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:40:48,462 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:40:48,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:40:49,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:49,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:40:49,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:49,231 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:40:49,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:49,437 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:40:49,438 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:40:49,438 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2144593038] [2021-11-07 01:40:49,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2144593038] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:40:49,438 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [3539508] [2021-11-07 01:40:49,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:49,438 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:40:49,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:40:49,442 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:40:49,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-07 01:40:50,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:50,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:40:50,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:50,437 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:40:50,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:50,627 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:40:50,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [3539508] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:40:50,627 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:40:50,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5, 5] total 9 [2021-11-07 01:40:50,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286526740] [2021-11-07 01:40:50,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:40:50,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:40:50,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:40:50,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:40:50,628 INFO L87 Difference]: Start difference. First operand 12808 states and 23226 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 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 01:40:51,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:40:51,214 INFO L93 Difference]: Finished difference Result 13142 states and 23788 transitions. [2021-11-07 01:40:51,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:40:51,214 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 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 69 [2021-11-07 01:40:51,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:40:51,242 INFO L225 Difference]: With dead ends: 13142 [2021-11-07 01:40:51,242 INFO L226 Difference]: Without dead ends: 12810 [2021-11-07 01:40:51,247 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 265 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:40:51,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12810 states. [2021-11-07 01:40:51,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12810 to 12796. [2021-11-07 01:40:51,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12796 states, 12792 states have (on average 1.8142589118198875) internal successors, (23208), 12795 states have internal predecessors, (23208), 0 states have call successors, (0), 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 01:40:51,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12796 states to 12796 states and 23208 transitions. [2021-11-07 01:40:51,999 INFO L78 Accepts]: Start accepts. Automaton has 12796 states and 23208 transitions. Word has length 69 [2021-11-07 01:40:51,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:40:51,999 INFO L470 AbstractCegarLoop]: Abstraction has 12796 states and 23208 transitions. [2021-11-07 01:40:51,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 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 01:40:51,999 INFO L276 IsEmpty]: Start isEmpty. Operand 12796 states and 23208 transitions. [2021-11-07 01:40:52,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-07 01:40:52,020 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:40:52,020 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:40:52,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:40:52,238 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-07 01:40:52,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:40:52,429 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:40:52,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:40:52,429 INFO L85 PathProgramCache]: Analyzing trace with hash -941046261, now seen corresponding path program 1 times [2021-11-07 01:40:52,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:40:52,430 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1246869909] [2021-11-07 01:40:52,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:52,430 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:40:52,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:40:52,431 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:40:52,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:40:53,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:53,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 598 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:40:53,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:53,335 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:40:53,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:53,648 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:40:53,648 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:40:53,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1246869909] [2021-11-07 01:40:53,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1246869909] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:40:53,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [644300050] [2021-11-07 01:40:53,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:53,649 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:40:53,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:40:53,664 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:40:53,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-07 01:40:54,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:54,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 598 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 01:40:54,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:55,241 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:40:55,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:55,670 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:40:55,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [644300050] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:40:55,670 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:40:55,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5] total 22 [2021-11-07 01:40:55,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459852311] [2021-11-07 01:40:55,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 01:40:55,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:40:55,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 01:40:55,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-11-07 01:40:55,673 INFO L87 Difference]: Start difference. First operand 12796 states and 23208 transitions. Second operand has 16 states, 16 states have (on average 9.0) internal successors, (144), 15 states have internal predecessors, (144), 0 states have call successors, (0), 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 01:41:15,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:41:15,315 INFO L93 Difference]: Finished difference Result 28386 states and 51063 transitions. [2021-11-07 01:41:15,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-07 01:41:15,316 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 9.0) internal successors, (144), 15 states have internal predecessors, (144), 0 states have call successors, (0), 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 99 [2021-11-07 01:41:15,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:41:15,372 INFO L225 Difference]: With dead ends: 28386 [2021-11-07 01:41:15,372 INFO L226 Difference]: Without dead ends: 28034 [2021-11-07 01:41:15,381 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 372 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=409, Invalid=1313, Unknown=0, NotChecked=0, Total=1722 [2021-11-07 01:41:15,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28034 states. [2021-11-07 01:41:16,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28034 to 25332. [2021-11-07 01:41:16,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25332 states, 25328 states have (on average 1.8153032217308906) internal successors, (45978), 25331 states have internal predecessors, (45978), 0 states have call successors, (0), 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 01:41:16,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25332 states to 25332 states and 45978 transitions. [2021-11-07 01:41:16,977 INFO L78 Accepts]: Start accepts. Automaton has 25332 states and 45978 transitions. Word has length 99 [2021-11-07 01:41:16,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:41:16,978 INFO L470 AbstractCegarLoop]: Abstraction has 25332 states and 45978 transitions. [2021-11-07 01:41:16,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 9.0) internal successors, (144), 15 states have internal predecessors, (144), 0 states have call successors, (0), 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 01:41:16,978 INFO L276 IsEmpty]: Start isEmpty. Operand 25332 states and 45978 transitions. [2021-11-07 01:41:17,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-07 01:41:17,025 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:41:17,025 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:41:17,041 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:41:17,238 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Ended with exit code 0 [2021-11-07 01:41:17,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:41:17,435 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:41:17,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:41:17,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1181632275, now seen corresponding path program 1 times [2021-11-07 01:41:17,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:41:17,436 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1030393425] [2021-11-07 01:41:17,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:41:17,436 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:41:17,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:41:17,437 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:41:17,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 01:41:18,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:41:18,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:41:18,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:41:18,534 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:41:18,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:41:18,834 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:41:18,834 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:41:18,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1030393425] [2021-11-07 01:41:18,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1030393425] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:41:18,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2137635992] [2021-11-07 01:41:18,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:41:18,835 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:41:18,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:41:18,836 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:41:18,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-07 01:41:19,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:41:19,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:41:19,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:41:20,071 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:41:20,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:41:20,261 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:41:20,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2137635992] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:41:20,262 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:41:20,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 10 [2021-11-07 01:41:20,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007301866] [2021-11-07 01:41:20,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:41:20,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:41:20,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:41:20,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:41:20,264 INFO L87 Difference]: Start difference. First operand 25332 states and 45978 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 01:41:21,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:41:21,212 INFO L93 Difference]: Finished difference Result 26079 states and 47242 transitions. [2021-11-07 01:41:21,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:41:21,213 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 100 [2021-11-07 01:41:21,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:41:21,257 INFO L225 Difference]: With dead ends: 26079 [2021-11-07 01:41:21,257 INFO L226 Difference]: Without dead ends: 25675 [2021-11-07 01:41:21,264 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 388 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:41:21,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25675 states. [2021-11-07 01:41:22,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25675 to 25331. [2021-11-07 01:41:22,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25331 states, 25327 states have (on average 1.8152169621352707) internal successors, (45974), 25330 states have internal predecessors, (45974), 0 states have call successors, (0), 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 01:41:22,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25331 states to 25331 states and 45974 transitions. [2021-11-07 01:41:22,586 INFO L78 Accepts]: Start accepts. Automaton has 25331 states and 45974 transitions. Word has length 100 [2021-11-07 01:41:22,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:41:22,587 INFO L470 AbstractCegarLoop]: Abstraction has 25331 states and 45974 transitions. [2021-11-07 01:41:22,587 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 01:41:22,587 INFO L276 IsEmpty]: Start isEmpty. Operand 25331 states and 45974 transitions. [2021-11-07 01:41:22,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-07 01:41:22,618 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:41:22,618 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:41:22,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-07 01:41:22,839 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-07 01:41:23,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:41:23,032 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:41:23,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:41:23,032 INFO L85 PathProgramCache]: Analyzing trace with hash -36511883, now seen corresponding path program 1 times [2021-11-07 01:41:23,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:41:23,033 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [190455179] [2021-11-07 01:41:23,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:41:23,033 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:41:23,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:41:23,034 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:41:23,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-07 01:41:23,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:41:23,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 600 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:41:23,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:41:24,120 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:41:24,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:41:24,357 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:41:24,357 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:41:24,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [190455179] [2021-11-07 01:41:24,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [190455179] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:41:24,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2042313533] [2021-11-07 01:41:24,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:41:24,357 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:41:24,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:41:24,369 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:41:24,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-07 01:41:25,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:41:25,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 600 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:41:25,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:41:25,834 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:41:25,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:41:26,150 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:41:26,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2042313533] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:41:26,150 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:41:26,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [5, 5] total 13 [2021-11-07 01:41:26,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468560113] [2021-11-07 01:41:26,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:41:26,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:41:26,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:41:26,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:41:26,156 INFO L87 Difference]: Start difference. First operand 25331 states and 45974 transitions. Second operand has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 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 01:41:29,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:41:29,333 INFO L93 Difference]: Finished difference Result 26150 states and 47345 transitions. [2021-11-07 01:41:29,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 01:41:29,334 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 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 101 [2021-11-07 01:41:29,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:41:29,372 INFO L225 Difference]: With dead ends: 26150 [2021-11-07 01:41:29,372 INFO L226 Difference]: Without dead ends: 25480 [2021-11-07 01:41:29,379 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 389 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-11-07 01:41:29,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25480 states. [2021-11-07 01:41:30,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25480 to 25295. [2021-11-07 01:41:30,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25295 states, 25291 states have (on average 1.8145980783677989) internal successors, (45893), 25294 states have internal predecessors, (45893), 0 states have call successors, (0), 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 01:41:30,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25295 states to 25295 states and 45893 transitions. [2021-11-07 01:41:30,523 INFO L78 Accepts]: Start accepts. Automaton has 25295 states and 45893 transitions. Word has length 101 [2021-11-07 01:41:30,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:41:30,523 INFO L470 AbstractCegarLoop]: Abstraction has 25295 states and 45893 transitions. [2021-11-07 01:41:30,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 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 01:41:30,524 INFO L276 IsEmpty]: Start isEmpty. Operand 25295 states and 45893 transitions. [2021-11-07 01:41:30,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-07 01:41:30,545 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:41:30,545 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:41:30,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-07 01:41:30,756 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-11-07 01:41:30,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:41:30,946 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:41:30,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:41:30,946 INFO L85 PathProgramCache]: Analyzing trace with hash 520193613, now seen corresponding path program 1 times [2021-11-07 01:41:30,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:41:30,947 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1842084049] [2021-11-07 01:41:30,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:41:30,947 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:41:30,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:41:30,948 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:41:30,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-07 01:41:31,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:41:31,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 600 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:41:31,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:41:32,117 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:41:32,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:41:32,375 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:41:32,375 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:41:32,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1842084049] [2021-11-07 01:41:32,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1842084049] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:41:32,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [940922918] [2021-11-07 01:41:32,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:41:32,376 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:41:32,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:41:32,376 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:41:32,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-11-07 01:41:33,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:41:33,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 600 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 01:41:33,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:41:34,210 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:41:34,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:41:34,668 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:41:34,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [940922918] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:41:34,669 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:41:34,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5] total 22 [2021-11-07 01:41:34,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361894199] [2021-11-07 01:41:34,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 01:41:34,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:41:34,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 01:41:34,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-11-07 01:41:34,671 INFO L87 Difference]: Start difference. First operand 25295 states and 45893 transitions. Second operand has 16 states, 16 states have (on average 9.1875) internal successors, (147), 15 states have internal predecessors, (147), 0 states have call successors, (0), 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 01:41:56,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:41:56,777 INFO L93 Difference]: Finished difference Result 54814 states and 98822 transitions. [2021-11-07 01:41:56,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-07 01:41:56,778 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 9.1875) internal successors, (147), 15 states have internal predecessors, (147), 0 states have call successors, (0), 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 101 [2021-11-07 01:41:56,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:41:56,863 INFO L225 Difference]: With dead ends: 54814 [2021-11-07 01:41:56,864 INFO L226 Difference]: Without dead ends: 54180 [2021-11-07 01:41:56,874 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 419 GetRequests, 380 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=391, Invalid=1249, Unknown=0, NotChecked=0, Total=1640 [2021-11-07 01:41:56,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54180 states. [2021-11-07 01:41:59,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54180 to 50257. [2021-11-07 01:41:59,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50257 states, 50253 states have (on average 1.8151354148011063) internal successors, (91216), 50256 states have internal predecessors, (91216), 0 states have call successors, (0), 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 01:41:59,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50257 states to 50257 states and 91216 transitions. [2021-11-07 01:41:59,328 INFO L78 Accepts]: Start accepts. Automaton has 50257 states and 91216 transitions. Word has length 101 [2021-11-07 01:41:59,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:41:59,328 INFO L470 AbstractCegarLoop]: Abstraction has 50257 states and 91216 transitions. [2021-11-07 01:41:59,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 9.1875) internal successors, (147), 15 states have internal predecessors, (147), 0 states have call successors, (0), 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 01:41:59,328 INFO L276 IsEmpty]: Start isEmpty. Operand 50257 states and 91216 transitions. [2021-11-07 01:41:59,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-07 01:41:59,384 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:41:59,384 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:41:59,404 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-07 01:41:59,609 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (25)] Ended with exit code 0 [2021-11-07 01:41:59,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:41:59,805 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:41:59,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:41:59,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1529194229, now seen corresponding path program 1 times [2021-11-07 01:41:59,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:41:59,806 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [706073939] [2021-11-07 01:41:59,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:41:59,806 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:41:59,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:41:59,808 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:41:59,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-07 01:42:00,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:42:00,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 600 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:42:00,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:42:01,080 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:42:01,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:42:01,342 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:42:01,342 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:42:01,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [706073939] [2021-11-07 01:42:01,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [706073939] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:42:01,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1641476119] [2021-11-07 01:42:01,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:42:01,343 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:42:01,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:42:01,344 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:42:01,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-11-07 01:42:02,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:42:02,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 600 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:42:02,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:42:03,149 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:42:03,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:42:03,652 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:42:03,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1641476119] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:42:03,653 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:42:03,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 11 [2021-11-07 01:42:03,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103291235] [2021-11-07 01:42:03,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:42:03,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:42:03,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:42:03,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:42:03,655 INFO L87 Difference]: Start difference. First operand 50257 states and 91216 transitions. Second operand has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 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 01:42:06,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:42:06,695 INFO L93 Difference]: Finished difference Result 57498 states and 103404 transitions. [2021-11-07 01:42:06,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 01:42:06,696 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 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 101 [2021-11-07 01:42:06,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:42:06,787 INFO L225 Difference]: With dead ends: 57498 [2021-11-07 01:42:06,788 INFO L226 Difference]: Without dead ends: 55897 [2021-11-07 01:42:06,800 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 391 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-11-07 01:42:06,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55897 states. [2021-11-07 01:42:09,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55897 to 52547. [2021-11-07 01:42:09,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52547 states, 52543 states have (on average 1.8088232495289573) internal successors, (95041), 52546 states have internal predecessors, (95041), 0 states have call successors, (0), 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 01:42:09,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52547 states to 52547 states and 95041 transitions. [2021-11-07 01:42:09,633 INFO L78 Accepts]: Start accepts. Automaton has 52547 states and 95041 transitions. Word has length 101 [2021-11-07 01:42:09,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:42:09,634 INFO L470 AbstractCegarLoop]: Abstraction has 52547 states and 95041 transitions. [2021-11-07 01:42:09,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 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 01:42:09,634 INFO L276 IsEmpty]: Start isEmpty. Operand 52547 states and 95041 transitions. [2021-11-07 01:42:09,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-07 01:42:09,696 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:42:09,696 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:42:09,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-07 01:42:09,923 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (27)] Ended with exit code 0 [2021-11-07 01:42:10,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:42:10,116 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:42:10,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:42:10,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1866159082, now seen corresponding path program 1 times [2021-11-07 01:42:10,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:42:10,117 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1714366465] [2021-11-07 01:42:10,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:42:10,117 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:42:10,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:42:10,119 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:42:10,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-07 01:42:11,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:42:11,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:42:11,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:42:11,501 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:42:11,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:42:11,758 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:42:11,759 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:42:11,759 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1714366465] [2021-11-07 01:42:11,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1714366465] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:42:11,759 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1664222606] [2021-11-07 01:42:11,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:42:11,759 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:42:11,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:42:11,769 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:42:11,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-11-07 01:42:13,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:42:13,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-07 01:42:13,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:42:13,706 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:42:13,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:42:13,933 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:42:13,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1664222606] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:42:13,933 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:42:13,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [5, 5] total 15 [2021-11-07 01:42:13,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517387945] [2021-11-07 01:42:13,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 01:42:13,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:42:13,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 01:42:13,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-11-07 01:42:13,935 INFO L87 Difference]: Start difference. First operand 52547 states and 95041 transitions. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 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 01:42:17,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:42:17,314 INFO L93 Difference]: Finished difference Result 56747 states and 102047 transitions. [2021-11-07 01:42:17,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-07 01:42:17,314 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 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 102 [2021-11-07 01:42:17,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:42:17,402 INFO L225 Difference]: With dead ends: 56747 [2021-11-07 01:42:17,402 INFO L226 Difference]: Without dead ends: 53521 [2021-11-07 01:42:17,413 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 391 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=165, Invalid=591, Unknown=0, NotChecked=0, Total=756 [2021-11-07 01:42:17,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53521 states. [2021-11-07 01:42:19,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53521 to 51553. [2021-11-07 01:42:19,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51553 states, 51549 states have (on average 1.8104327921007197) internal successors, (93326), 51552 states have internal predecessors, (93326), 0 states have call successors, (0), 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 01:42:19,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51553 states to 51553 states and 93326 transitions. [2021-11-07 01:42:19,941 INFO L78 Accepts]: Start accepts. Automaton has 51553 states and 93326 transitions. Word has length 102 [2021-11-07 01:42:19,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:42:19,942 INFO L470 AbstractCegarLoop]: Abstraction has 51553 states and 93326 transitions. [2021-11-07 01:42:19,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 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 01:42:19,942 INFO L276 IsEmpty]: Start isEmpty. Operand 51553 states and 93326 transitions. [2021-11-07 01:42:19,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-07 01:42:19,991 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:42:19,991 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:42:20,010 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-07 01:42:20,200 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2021-11-07 01:42:20,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:42:20,397 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:42:20,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:42:20,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1394115534, now seen corresponding path program 1 times [2021-11-07 01:42:20,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:42:20,397 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1126450548] [2021-11-07 01:42:20,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:42:20,398 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:42:20,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:42:20,398 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:42:20,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-07 01:42:21,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:42:21,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 612 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:42:21,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:42:22,131 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:42:22,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:42:22,402 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:42:22,403 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:42:22,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1126450548] [2021-11-07 01:42:22,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1126450548] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:42:22,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [304608557] [2021-11-07 01:42:22,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:42:22,403 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:42:22,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:42:22,404 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:42:22,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2021-11-07 01:42:24,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:42:24,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 612 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:42:24,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:42:24,308 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:42:24,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:42:24,515 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:42:24,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [304608557] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:42:24,515 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:42:24,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 10 [2021-11-07 01:42:24,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190661957] [2021-11-07 01:42:24,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:42:24,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:42:24,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:42:24,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:42:24,517 INFO L87 Difference]: Start difference. First operand 51553 states and 93326 transitions. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:27,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:42:27,522 INFO L93 Difference]: Finished difference Result 57350 states and 102834 transitions. [2021-11-07 01:42:27,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:42:27,523 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2021-11-07 01:42:27,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:42:27,603 INFO L225 Difference]: With dead ends: 57350 [2021-11-07 01:42:27,603 INFO L226 Difference]: Without dead ends: 54854 [2021-11-07 01:42:27,613 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 404 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:42:27,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54854 states. [2021-11-07 01:42:29,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54854 to 51621. [2021-11-07 01:42:30,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51621 states, 51617 states have (on average 1.8093651316426758) internal successors, (93394), 51620 states have internal predecessors, (93394), 0 states have call successors, (0), 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 01:42:30,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51621 states to 51621 states and 93394 transitions. [2021-11-07 01:42:30,334 INFO L78 Accepts]: Start accepts. Automaton has 51621 states and 93394 transitions. Word has length 104 [2021-11-07 01:42:30,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:42:30,335 INFO L470 AbstractCegarLoop]: Abstraction has 51621 states and 93394 transitions. [2021-11-07 01:42:30,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:30,335 INFO L276 IsEmpty]: Start isEmpty. Operand 51621 states and 93394 transitions. [2021-11-07 01:42:30,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-07 01:42:30,391 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:42:30,391 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:42:30,409 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-07 01:42:30,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2021-11-07 01:42:30,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:42:30,808 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:42:30,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:42:30,808 INFO L85 PathProgramCache]: Analyzing trace with hash -87988143, now seen corresponding path program 1 times [2021-11-07 01:42:30,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:42:30,809 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2007932595] [2021-11-07 01:42:30,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:42:30,809 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:42:30,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:42:30,810 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:42:30,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-07 01:42:32,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:42:32,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 612 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:42:32,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:42:32,404 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:42:32,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:42:32,684 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:42:32,684 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:42:32,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2007932595] [2021-11-07 01:42:32,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2007932595] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:42:32,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [447370999] [2021-11-07 01:42:32,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:42:32,685 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:42:32,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:42:32,693 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:42:32,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2021-11-07 01:42:34,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:42:34,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 612 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 01:42:34,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:42:34,872 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:42:34,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:42:35,111 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:42:35,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [447370999] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:42:35,111 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:42:35,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [5, 5] total 12 [2021-11-07 01:42:35,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788527429] [2021-11-07 01:42:35,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:42:35,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:42:35,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:42:35,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:42:35,113 INFO L87 Difference]: Start difference. First operand 51621 states and 93394 transitions. Second operand has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:38,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:42:38,116 INFO L93 Difference]: Finished difference Result 55825 states and 100303 transitions. [2021-11-07 01:42:38,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:42:38,116 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2021-11-07 01:42:38,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:42:38,204 INFO L225 Difference]: With dead ends: 55825 [2021-11-07 01:42:38,205 INFO L226 Difference]: Without dead ends: 53118 [2021-11-07 01:42:38,222 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 402 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:42:38,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53118 states. [2021-11-07 01:42:40,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53118 to 51394. [2021-11-07 01:42:41,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51394 states, 51390 states have (on average 1.8096906012842966) internal successors, (93000), 51393 states have internal predecessors, (93000), 0 states have call successors, (0), 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 01:42:41,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51394 states to 51394 states and 93000 transitions. [2021-11-07 01:42:41,127 INFO L78 Accepts]: Start accepts. Automaton has 51394 states and 93000 transitions. Word has length 104 [2021-11-07 01:42:41,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:42:41,127 INFO L470 AbstractCegarLoop]: Abstraction has 51394 states and 93000 transitions. [2021-11-07 01:42:41,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:41,127 INFO L276 IsEmpty]: Start isEmpty. Operand 51394 states and 93000 transitions. [2021-11-07 01:42:41,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-07 01:42:41,176 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:42:41,176 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:42:41,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2021-11-07 01:42:41,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-11-07 01:42:41,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:42:41,578 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:42:41,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:42:41,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1420953601, now seen corresponding path program 1 times [2021-11-07 01:42:41,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:42:41,579 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2070051798] [2021-11-07 01:42:41,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:42:41,580 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:42:41,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:42:41,580 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:42:41,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-07 01:42:43,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:42:43,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 630 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:42:43,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:42:43,381 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:42:43,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:42:43,641 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:42:43,641 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:42:43,641 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2070051798] [2021-11-07 01:42:43,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2070051798] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:42:43,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1711132462] [2021-11-07 01:42:43,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:42:43,642 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:42:43,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:42:43,665 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:42:43,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8dd76a2-0685-4100-89c5-2e5f41f6bb02/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2021-11-07 01:42:45,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:42:45,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 630 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:42:45,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:42:45,921 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:42:45,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:42:46,204 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:42:46,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1711132462] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:42:46,204 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:42:46,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 11 [2021-11-07 01:42:46,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374814187] [2021-11-07 01:42:46,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:42:46,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:42:46,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:42:46,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:42:46,206 INFO L87 Difference]: Start difference. First operand 51394 states and 93000 transitions. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)