./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec14_product20.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_96d69e41-c354-4309-966c-8aecf2cd9ff0/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d69e41-c354-4309-966c-8aecf2cd9ff0/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_96d69e41-c354-4309-966c-8aecf2cd9ff0/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d69e41-c354-4309-966c-8aecf2cd9ff0/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec14_product20.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d69e41-c354-4309-966c-8aecf2cd9ff0/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_96d69e41-c354-4309-966c-8aecf2cd9ff0/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 f6cc861ca86011eb32ffd09a18c7045c0cb28e684d3b73d1659bc499a4213e84 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:05:58,651 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:05:58,655 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:05:58,721 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:05:58,722 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:05:58,728 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:05:58,730 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:05:58,735 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:05:58,738 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:05:58,744 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:05:58,745 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:05:58,747 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:05:58,748 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:05:58,750 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:05:58,753 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:05:58,757 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:05:58,759 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:05:58,761 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:05:58,763 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:05:58,774 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:05:58,776 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:05:58,778 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:05:58,781 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:05:58,783 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:05:58,787 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:05:58,787 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:05:58,788 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:05:58,790 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:05:58,791 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:05:58,793 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:05:58,793 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:05:58,794 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:05:58,796 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:05:58,798 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:05:58,799 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:05:58,800 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:05:58,800 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:05:58,801 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:05:58,801 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:05:58,802 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:05:58,803 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:05:58,804 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d69e41-c354-4309-966c-8aecf2cd9ff0/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 02:05:58,846 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:05:58,846 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:05:58,847 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:05:58,848 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:05:58,848 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:05:58,848 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:05:58,848 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 02:05:58,849 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:05:58,849 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:05:58,849 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 02:05:58,850 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 02:05:58,851 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:05:58,851 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 02:05:58,851 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 02:05:58,851 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 02:05:58,852 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:05:58,853 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:05:58,853 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 02:05:58,853 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:05:58,853 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:05:58,854 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:05:58,854 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:05:58,854 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:05:58,854 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:05:58,854 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:05:58,855 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:05:58,855 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:05:58,855 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:05:58,856 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:05:58,857 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:05:58,858 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:05:58,858 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:05:58,859 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:05:58,859 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:05:58,859 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 02:05:58,859 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 02:05:58,860 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:05:58,860 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:05:58,860 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:05:58,860 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_96d69e41-c354-4309-966c-8aecf2cd9ff0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d69e41-c354-4309-966c-8aecf2cd9ff0/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f6cc861ca86011eb32ffd09a18c7045c0cb28e684d3b73d1659bc499a4213e84 [2021-11-07 02:05:59,195 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:05:59,219 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:05:59,221 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:05:59,222 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:05:59,223 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:05:59,224 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d69e41-c354-4309-966c-8aecf2cd9ff0/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/elevator_spec14_product20.cil.c [2021-11-07 02:05:59,311 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d69e41-c354-4309-966c-8aecf2cd9ff0/bin/utaipan-UUZaoUuFF8/data/3207ee7ae/696a27782ae44c01a01f98bc55dd32a0/FLAG3d66a759c [2021-11-07 02:05:59,973 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:05:59,974 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d69e41-c354-4309-966c-8aecf2cd9ff0/sv-benchmarks/c/product-lines/elevator_spec14_product20.cil.c [2021-11-07 02:05:59,997 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d69e41-c354-4309-966c-8aecf2cd9ff0/bin/utaipan-UUZaoUuFF8/data/3207ee7ae/696a27782ae44c01a01f98bc55dd32a0/FLAG3d66a759c [2021-11-07 02:06:00,197 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d69e41-c354-4309-966c-8aecf2cd9ff0/bin/utaipan-UUZaoUuFF8/data/3207ee7ae/696a27782ae44c01a01f98bc55dd32a0 [2021-11-07 02:06:00,199 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:06:00,201 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:06:00,202 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:06:00,203 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:06:00,206 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:06:00,206 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:06:00" (1/1) ... [2021-11-07 02:06:00,208 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@670ca4d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:00, skipping insertion in model container [2021-11-07 02:06:00,208 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:06:00" (1/1) ... [2021-11-07 02:06:00,215 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:06:00,306 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:06:00,802 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_96d69e41-c354-4309-966c-8aecf2cd9ff0/sv-benchmarks/c/product-lines/elevator_spec14_product20.cil.c[69987,70000] [2021-11-07 02:06:00,805 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:06:00,816 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-07 02:06:00,817 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@376e5d47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:00, skipping insertion in model container [2021-11-07 02:06:00,817 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:06:00,817 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 02:06:00,820 INFO L168 Benchmark]: Toolchain (without parser) took 617.52 ms. Allocated memory was 81.8 MB in the beginning and 100.7 MB in the end (delta: 18.9 MB). Free memory was 45.3 MB in the beginning and 62.3 MB in the end (delta: -17.0 MB). Peak memory consumption was 8.7 MB. Max. memory is 16.1 GB. [2021-11-07 02:06:00,821 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 81.8 MB. Free memory was 60.8 MB in the beginning and 60.8 MB in the end (delta: 28.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 02:06:00,822 INFO L168 Benchmark]: CACSL2BoogieTranslator took 614.90 ms. Allocated memory was 81.8 MB in the beginning and 100.7 MB in the end (delta: 18.9 MB). Free memory was 45.2 MB in the beginning and 62.3 MB in the end (delta: -17.1 MB). Peak memory consumption was 8.7 MB. Max. memory is 16.1 GB. [2021-11-07 02:06:00,823 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 81.8 MB. Free memory was 60.8 MB in the beginning and 60.8 MB in the end (delta: 28.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 614.90 ms. Allocated memory was 81.8 MB in the beginning and 100.7 MB in the end (delta: 18.9 MB). Free memory was 45.2 MB in the beginning and 62.3 MB in the end (delta: -17.1 MB). Peak memory consumption was 8.7 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_96d69e41-c354-4309-966c-8aecf2cd9ff0/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d69e41-c354-4309-966c-8aecf2cd9ff0/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_96d69e41-c354-4309-966c-8aecf2cd9ff0/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d69e41-c354-4309-966c-8aecf2cd9ff0/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec14_product20.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d69e41-c354-4309-966c-8aecf2cd9ff0/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_96d69e41-c354-4309-966c-8aecf2cd9ff0/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 f6cc861ca86011eb32ffd09a18c7045c0cb28e684d3b73d1659bc499a4213e84 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:06:03,102 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:06:03,105 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:06:03,159 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:06:03,160 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:06:03,164 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:06:03,166 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:06:03,170 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:06:03,173 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:06:03,181 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:06:03,182 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:06:03,184 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:06:03,185 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:06:03,187 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:06:03,189 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:06:03,193 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:06:03,195 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:06:03,196 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:06:03,198 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:06:03,206 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:06:03,208 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:06:03,209 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:06:03,212 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:06:03,214 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:06:03,222 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:06:03,223 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:06:03,223 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:06:03,225 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:06:03,226 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:06:03,227 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:06:03,227 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:06:03,228 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:06:03,230 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:06:03,231 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:06:03,233 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:06:03,233 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:06:03,234 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:06:03,234 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:06:03,234 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:06:03,236 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:06:03,237 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:06:03,242 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d69e41-c354-4309-966c-8aecf2cd9ff0/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 02:06:03,292 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:06:03,292 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:06:03,294 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:06:03,294 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:06:03,295 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:06:03,295 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:06:03,295 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:06:03,295 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:06:03,296 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:06:03,298 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:06:03,299 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:06:03,299 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:06:03,299 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:06:03,300 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:06:03,300 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:06:03,300 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:06:03,300 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:06:03,301 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 02:06:03,301 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 02:06:03,301 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:06:03,302 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:06:03,302 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:06:03,302 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:06:03,302 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:06:03,303 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 02:06:03,303 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:06:03,303 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:06:03,304 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:06:03,304 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:06:03,304 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:06:03,304 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 02:06:03,305 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 02:06:03,305 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:06:03,305 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:06:03,306 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:06:03,306 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_96d69e41-c354-4309-966c-8aecf2cd9ff0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d69e41-c354-4309-966c-8aecf2cd9ff0/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f6cc861ca86011eb32ffd09a18c7045c0cb28e684d3b73d1659bc499a4213e84 [2021-11-07 02:06:03,775 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:06:03,806 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:06:03,809 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:06:03,810 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:06:03,811 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:06:03,812 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d69e41-c354-4309-966c-8aecf2cd9ff0/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/elevator_spec14_product20.cil.c [2021-11-07 02:06:03,887 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d69e41-c354-4309-966c-8aecf2cd9ff0/bin/utaipan-UUZaoUuFF8/data/06c5a562b/8df889eec90041678f398350f4cc8faa/FLAG1d0c7c6fe [2021-11-07 02:06:04,602 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:06:04,602 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d69e41-c354-4309-966c-8aecf2cd9ff0/sv-benchmarks/c/product-lines/elevator_spec14_product20.cil.c [2021-11-07 02:06:04,628 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d69e41-c354-4309-966c-8aecf2cd9ff0/bin/utaipan-UUZaoUuFF8/data/06c5a562b/8df889eec90041678f398350f4cc8faa/FLAG1d0c7c6fe [2021-11-07 02:06:04,802 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d69e41-c354-4309-966c-8aecf2cd9ff0/bin/utaipan-UUZaoUuFF8/data/06c5a562b/8df889eec90041678f398350f4cc8faa [2021-11-07 02:06:04,805 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:06:04,811 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:06:04,812 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:06:04,815 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:06:04,819 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:06:04,820 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:06:04" (1/1) ... [2021-11-07 02:06:04,821 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49dbbad1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:04, skipping insertion in model container [2021-11-07 02:06:04,821 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:06:04" (1/1) ... [2021-11-07 02:06:04,830 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:06:04,927 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:06:05,545 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_96d69e41-c354-4309-966c-8aecf2cd9ff0/sv-benchmarks/c/product-lines/elevator_spec14_product20.cil.c[69987,70000] [2021-11-07 02:06:05,550 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:06:05,570 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 02:06:05,604 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:06:05,748 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_96d69e41-c354-4309-966c-8aecf2cd9ff0/sv-benchmarks/c/product-lines/elevator_spec14_product20.cil.c[69987,70000] [2021-11-07 02:06:05,748 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:06:05,753 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 02:06:05,844 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_96d69e41-c354-4309-966c-8aecf2cd9ff0/sv-benchmarks/c/product-lines/elevator_spec14_product20.cil.c[69987,70000] [2021-11-07 02:06:05,845 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:06:05,874 INFO L208 MainTranslator]: Completed translation [2021-11-07 02:06:05,874 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:05 WrapperNode [2021-11-07 02:06:05,874 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:06:05,876 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 02:06:05,876 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 02:06:05,876 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 02:06:05,883 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:05" (1/1) ... [2021-11-07 02:06:05,918 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:05" (1/1) ... [2021-11-07 02:06:06,624 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 02:06:06,625 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 02:06:06,637 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 02:06:06,638 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 02:06:06,647 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:05" (1/1) ... [2021-11-07 02:06:06,647 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:05" (1/1) ... [2021-11-07 02:06:06,798 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:05" (1/1) ... [2021-11-07 02:06:06,798 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:05" (1/1) ... [2021-11-07 02:06:07,096 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:05" (1/1) ... [2021-11-07 02:06:07,544 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:05" (1/1) ... [2021-11-07 02:06:07,609 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:05" (1/1) ... [2021-11-07 02:06:07,773 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 02:06:07,775 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 02:06:07,775 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 02:06:07,776 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 02:06:07,776 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:05" (1/1) ... [2021-11-07 02:06:07,790 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:06:07,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d69e41-c354-4309-966c-8aecf2cd9ff0/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:06:07,859 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d69e41-c354-4309-966c-8aecf2cd9ff0/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 02:06:07,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d69e41-c354-4309-966c-8aecf2cd9ff0/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 02:06:07,955 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 02:06:07,955 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 02:06:07,955 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 02:06:07,956 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 02:06:30,921 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 02:06:30,922 INFO L299 CfgBuilder]: Removed 2663 assume(true) statements. [2021-11-07 02:06:30,934 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:06:30 BoogieIcfgContainer [2021-11-07 02:06:30,934 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 02:06:30,937 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 02:06:30,937 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 02:06:30,940 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 02:06:30,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:06:04" (1/3) ... [2021-11-07 02:06:30,941 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41e2618e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:06:30, skipping insertion in model container [2021-11-07 02:06:30,941 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:05" (2/3) ... [2021-11-07 02:06:30,942 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41e2618e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:06:30, skipping insertion in model container [2021-11-07 02:06:30,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:06:30" (3/3) ... [2021-11-07 02:06:30,943 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec14_product20.cil.c [2021-11-07 02:06:30,949 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 02:06:30,949 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-11-07 02:06:31,058 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 02:06:31,068 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 02:06:31,068 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-11-07 02:06:31,276 INFO L276 IsEmpty]: Start isEmpty. Operand has 11587 states, 11581 states have (on average 1.889215093687937) internal successors, (21879), 11586 states have internal predecessors, (21879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:31,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-07 02:06:31,287 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:06:31,288 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] [2021-11-07 02:06:31,288 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:06:31,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:06:31,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1171467047, now seen corresponding path program 1 times [2021-11-07 02:06:31,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:06:31,309 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [340873301] [2021-11-07 02:06:31,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:06:31,310 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:06:31,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d69e41-c354-4309-966c-8aecf2cd9ff0/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:06:31,313 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d69e41-c354-4309-966c-8aecf2cd9ff0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:06:31,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d69e41-c354-4309-966c-8aecf2cd9ff0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 02:06:31,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:06:31,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:06:31,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:06:31,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:06:31,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:06:31,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:06:31,894 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:06:31,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [340873301] [2021-11-07 02:06:31,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [340873301] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:06:31,909 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:06:31,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:06:31,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120114914] [2021-11-07 02:06:31,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:06:31,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:06:31,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:06:31,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:06:31,992 INFO L87 Difference]: Start difference. First operand has 11587 states, 11581 states have (on average 1.889215093687937) internal successors, (21879), 11586 states have internal predecessors, (21879), 0 states have call successors, (0), 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 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:33,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:06:33,279 INFO L93 Difference]: Finished difference Result 32498 states and 61361 transitions. [2021-11-07 02:06:33,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:06:33,281 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 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 27 [2021-11-07 02:06:33,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:06:33,444 INFO L225 Difference]: With dead ends: 32498 [2021-11-07 02:06:33,444 INFO L226 Difference]: Without dead ends: 20911 [2021-11-07 02:06:33,472 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:06:33,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20911 states. [2021-11-07 02:06:34,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20911 to 11583. [2021-11-07 02:06:34,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11583 states, 11578 states have (on average 1.887977198134393) internal successors, (21859), 11582 states have internal predecessors, (21859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:34,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11583 states to 11583 states and 21859 transitions. [2021-11-07 02:06:34,270 INFO L78 Accepts]: Start accepts. Automaton has 11583 states and 21859 transitions. Word has length 27 [2021-11-07 02:06:34,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:06:34,270 INFO L470 AbstractCegarLoop]: Abstraction has 11583 states and 21859 transitions. [2021-11-07 02:06:34,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:34,271 INFO L276 IsEmpty]: Start isEmpty. Operand 11583 states and 21859 transitions. [2021-11-07 02:06:34,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-07 02:06:34,274 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:06:34,275 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] [2021-11-07 02:06:34,290 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d69e41-c354-4309-966c-8aecf2cd9ff0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-07 02:06:34,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d69e41-c354-4309-966c-8aecf2cd9ff0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:06:34,491 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:06:34,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:06:34,492 INFO L85 PathProgramCache]: Analyzing trace with hash -19051931, now seen corresponding path program 1 times [2021-11-07 02:06:34,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:06:34,493 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1633111398] [2021-11-07 02:06:34,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:06:34,493 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:06:34,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d69e41-c354-4309-966c-8aecf2cd9ff0/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:06:34,496 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d69e41-c354-4309-966c-8aecf2cd9ff0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:06:34,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d69e41-c354-4309-966c-8aecf2cd9ff0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 02:06:34,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:06:34,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:06:34,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:06:34,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:06:34,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:06:35,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:06:35,070 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:06:35,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1633111398] [2021-11-07 02:06:35,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1633111398] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:06:35,071 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:06:35,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:06:35,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008518068] [2021-11-07 02:06:35,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:06:35,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:06:35,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:06:35,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:06:35,078 INFO L87 Difference]: Start difference. First operand 11583 states and 21859 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:37,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:06:37,330 INFO L93 Difference]: Finished difference Result 46297 states and 87361 transitions. [2021-11-07 02:06:37,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 02:06:37,331 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 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 32 [2021-11-07 02:06:37,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:06:37,477 INFO L225 Difference]: With dead ends: 46297 [2021-11-07 02:06:37,477 INFO L226 Difference]: Without dead ends: 34735 [2021-11-07 02:06:37,504 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:06:37,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34735 states. [2021-11-07 02:06:38,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34735 to 11561. [2021-11-07 02:06:38,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11561 states, 11556 states have (on average 1.8871581862236069) internal successors, (21808), 11560 states have internal predecessors, (21808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:38,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11561 states to 11561 states and 21808 transitions. [2021-11-07 02:06:38,178 INFO L78 Accepts]: Start accepts. Automaton has 11561 states and 21808 transitions. Word has length 32 [2021-11-07 02:06:38,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:06:38,179 INFO L470 AbstractCegarLoop]: Abstraction has 11561 states and 21808 transitions. [2021-11-07 02:06:38,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:38,180 INFO L276 IsEmpty]: Start isEmpty. Operand 11561 states and 21808 transitions. [2021-11-07 02:06:38,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-07 02:06:38,184 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:06:38,191 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] [2021-11-07 02:06:38,206 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d69e41-c354-4309-966c-8aecf2cd9ff0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 02:06:38,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d69e41-c354-4309-966c-8aecf2cd9ff0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:06:38,406 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:06:38,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:06:38,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1898000965, now seen corresponding path program 1 times [2021-11-07 02:06:38,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:06:38,423 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1716271591] [2021-11-07 02:06:38,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:06:38,423 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:06:38,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d69e41-c354-4309-966c-8aecf2cd9ff0/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:06:38,425 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d69e41-c354-4309-966c-8aecf2cd9ff0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:06:38,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d69e41-c354-4309-966c-8aecf2cd9ff0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 02:06:38,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:06:38,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:06:38,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:06:38,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:06:38,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:06:38,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:06:38,985 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:06:38,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1716271591] [2021-11-07 02:06:38,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1716271591] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:06:38,985 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:06:38,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:06:38,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175620560] [2021-11-07 02:06:38,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:06:38,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:06:38,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:06:38,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:06:38,988 INFO L87 Difference]: Start difference. First operand 11561 states and 21808 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:39,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:06:39,857 INFO L93 Difference]: Finished difference Result 32357 states and 61049 transitions. [2021-11-07 02:06:39,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:06:39,858 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 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 33 [2021-11-07 02:06:39,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:06:39,922 INFO L225 Difference]: With dead ends: 32357 [2021-11-07 02:06:39,922 INFO L226 Difference]: Without dead ends: 20817 [2021-11-07 02:06:39,945 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:06:39,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20817 states. [2021-11-07 02:06:40,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20817 to 11561. [2021-11-07 02:06:40,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11561 states, 11556 states have (on average 1.8866389754240223) internal successors, (21802), 11560 states have internal predecessors, (21802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:40,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11561 states to 11561 states and 21802 transitions. [2021-11-07 02:06:40,576 INFO L78 Accepts]: Start accepts. Automaton has 11561 states and 21802 transitions. Word has length 33 [2021-11-07 02:06:40,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:06:40,577 INFO L470 AbstractCegarLoop]: Abstraction has 11561 states and 21802 transitions. [2021-11-07 02:06:40,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:40,578 INFO L276 IsEmpty]: Start isEmpty. Operand 11561 states and 21802 transitions. [2021-11-07 02:06:40,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-07 02:06:40,582 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:06:40,582 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] [2021-11-07 02:06:40,601 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d69e41-c354-4309-966c-8aecf2cd9ff0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 02:06:40,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d69e41-c354-4309-966c-8aecf2cd9ff0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:06:40,799 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:06:40,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:06:40,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1114280216, now seen corresponding path program 1 times [2021-11-07 02:06:40,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:06:40,802 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1001170083] [2021-11-07 02:06:40,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:06:40,802 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:06:40,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d69e41-c354-4309-966c-8aecf2cd9ff0/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:06:40,804 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d69e41-c354-4309-966c-8aecf2cd9ff0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:06:40,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d69e41-c354-4309-966c-8aecf2cd9ff0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 02:06:41,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:06:41,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:06:41,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:06:41,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:06:41,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:06:41,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:06:41,487 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:06:41,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1001170083] [2021-11-07 02:06:41,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1001170083] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:06:41,487 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:06:41,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 02:06:41,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802517914] [2021-11-07 02:06:41,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:06:41,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:06:41,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:06:41,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:06:41,490 INFO L87 Difference]: Start difference. First operand 11561 states and 21802 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:44,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:06:44,958 INFO L93 Difference]: Finished difference Result 64748 states and 122148 transitions. [2021-11-07 02:06:44,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 02:06:44,959 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 0 states have call successors, (0), 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 38 [2021-11-07 02:06:44,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:06:45,126 INFO L225 Difference]: With dead ends: 64748 [2021-11-07 02:06:45,127 INFO L226 Difference]: Without dead ends: 53211 [2021-11-07 02:06:45,151 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-11-07 02:06:45,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53211 states. [2021-11-07 02:06:45,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53211 to 11563. [2021-11-07 02:06:45,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11563 states, 11558 states have (on average 1.8860529503374286) internal successors, (21799), 11562 states have internal predecessors, (21799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:45,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11563 states to 11563 states and 21799 transitions. [2021-11-07 02:06:45,870 INFO L78 Accepts]: Start accepts. Automaton has 11563 states and 21799 transitions. Word has length 38 [2021-11-07 02:06:45,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:06:45,870 INFO L470 AbstractCegarLoop]: Abstraction has 11563 states and 21799 transitions. [2021-11-07 02:06:45,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:45,871 INFO L276 IsEmpty]: Start isEmpty. Operand 11563 states and 21799 transitions. [2021-11-07 02:06:45,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-07 02:06:45,872 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:06:45,872 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] [2021-11-07 02:06:45,889 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d69e41-c354-4309-966c-8aecf2cd9ff0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 02:06:46,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d69e41-c354-4309-966c-8aecf2cd9ff0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:06:46,090 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:06:46,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:06:46,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1151608282, now seen corresponding path program 1 times [2021-11-07 02:06:46,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:06:46,092 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1769147448] [2021-11-07 02:06:46,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:06:46,092 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:06:46,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d69e41-c354-4309-966c-8aecf2cd9ff0/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:06:46,094 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d69e41-c354-4309-966c-8aecf2cd9ff0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:06:46,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d69e41-c354-4309-966c-8aecf2cd9ff0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 02:06:46,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:06:46,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:06:46,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:06:46,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:06:46,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:06:46,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:06:46,908 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:06:46,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1769147448] [2021-11-07 02:06:46,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1769147448] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:06:46,908 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:06:46,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-07 02:06:46,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502607063] [2021-11-07 02:06:46,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:06:46,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:06:46,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:06:46,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:06:46,910 INFO L87 Difference]: Start difference. First operand 11563 states and 21799 transitions. Second operand has 4 states, 4 states have (on average 16.75) 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 02:06:48,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:06:48,772 INFO L93 Difference]: Finished difference Result 38335 states and 72367 transitions. [2021-11-07 02:06:48,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:06:48,773 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) 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 39 [2021-11-07 02:06:48,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:06:48,859 INFO L225 Difference]: With dead ends: 38335 [2021-11-07 02:06:48,859 INFO L226 Difference]: Without dead ends: 29066 [2021-11-07 02:06:48,877 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:06:48,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29066 states. [2021-11-07 02:06:49,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29066 to 16044. [2021-11-07 02:06:49,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16044 states, 16039 states have (on average 1.8856537190597917) internal successors, (30244), 16043 states have internal predecessors, (30244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:49,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16044 states to 16044 states and 30244 transitions. [2021-11-07 02:06:49,696 INFO L78 Accepts]: Start accepts. Automaton has 16044 states and 30244 transitions. Word has length 39 [2021-11-07 02:06:49,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:06:49,697 INFO L470 AbstractCegarLoop]: Abstraction has 16044 states and 30244 transitions. [2021-11-07 02:06:49,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) 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 02:06:49,698 INFO L276 IsEmpty]: Start isEmpty. Operand 16044 states and 30244 transitions. [2021-11-07 02:06:49,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-07 02:06:49,704 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:06:49,704 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] [2021-11-07 02:06:49,725 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d69e41-c354-4309-966c-8aecf2cd9ff0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 02:06:49,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d69e41-c354-4309-966c-8aecf2cd9ff0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:06:49,924 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:06:49,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:06:49,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1197533483, now seen corresponding path program 1 times [2021-11-07 02:06:49,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:06:49,927 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [90068171] [2021-11-07 02:06:49,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:06:49,927 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:06:49,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d69e41-c354-4309-966c-8aecf2cd9ff0/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:06:49,931 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d69e41-c354-4309-966c-8aecf2cd9ff0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:06:49,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d69e41-c354-4309-966c-8aecf2cd9ff0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 02:06:50,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:06:50,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:06:50,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:06:50,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:06:50,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:06:50,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:06:50,822 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:06:50,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [90068171] [2021-11-07 02:06:50,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [90068171] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:06:50,823 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:06:50,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-07 02:06:50,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059385407] [2021-11-07 02:06:50,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:06:50,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:06:50,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:06:50,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:06:50,825 INFO L87 Difference]: Start difference. First operand 16044 states and 30244 transitions. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 7 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:52,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:06:52,089 INFO L93 Difference]: Finished difference Result 35630 states and 66844 transitions. [2021-11-07 02:06:52,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 02:06:52,102 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 7 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-07 02:06:52,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:06:52,147 INFO L225 Difference]: With dead ends: 35630 [2021-11-07 02:06:52,148 INFO L226 Difference]: Without dead ends: 20746 [2021-11-07 02:06:52,162 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-07 02:06:52,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20746 states. [2021-11-07 02:06:52,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20746 to 13611. [2021-11-07 02:06:52,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13611 states, 13606 states have (on average 1.8813023666029693) internal successors, (25597), 13610 states have internal predecessors, (25597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:52,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13611 states to 13611 states and 25597 transitions. [2021-11-07 02:06:52,632 INFO L78 Accepts]: Start accepts. Automaton has 13611 states and 25597 transitions. Word has length 58 [2021-11-07 02:06:52,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:06:52,633 INFO L470 AbstractCegarLoop]: Abstraction has 13611 states and 25597 transitions. [2021-11-07 02:06:52,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 7 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:52,749 INFO L276 IsEmpty]: Start isEmpty. Operand 13611 states and 25597 transitions. [2021-11-07 02:06:52,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-07 02:06:52,752 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:06:52,752 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] [2021-11-07 02:06:52,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d69e41-c354-4309-966c-8aecf2cd9ff0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 02:06:52,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d69e41-c354-4309-966c-8aecf2cd9ff0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:06:52,953 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:06:52,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:06:52,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1097528231, now seen corresponding path program 1 times [2021-11-07 02:06:52,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:06:52,954 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1376712821] [2021-11-07 02:06:52,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:06:52,955 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:06:52,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d69e41-c354-4309-966c-8aecf2cd9ff0/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:06:52,956 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d69e41-c354-4309-966c-8aecf2cd9ff0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:06:52,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d69e41-c354-4309-966c-8aecf2cd9ff0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 02:06:53,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:06:53,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:06:53,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:06:53,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:06:53,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:06:53,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:06:53,785 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:06:53,785 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1376712821] [2021-11-07 02:06:53,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1376712821] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:06:53,786 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:06:53,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-07 02:06:53,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639655872] [2021-11-07 02:06:53,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:06:53,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:06:53,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:06:53,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:06:53,787 INFO L87 Difference]: Start difference. First operand 13611 states and 25597 transitions. Second operand has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 5 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:59,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:06:59,093 INFO L93 Difference]: Finished difference Result 49984 states and 94335 transitions. [2021-11-07 02:06:59,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:06:59,093 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 5 states have internal predecessors, (88), 0 states have call successors, (0), 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 59 [2021-11-07 02:06:59,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:06:59,148 INFO L225 Difference]: With dead ends: 49984 [2021-11-07 02:06:59,148 INFO L226 Difference]: Without dead ends: 36406 [2021-11-07 02:06:59,166 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 112 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 02:06:59,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36406 states. [2021-11-07 02:06:59,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36406 to 13611. [2021-11-07 02:06:59,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13611 states, 13606 states have (on average 1.841466999853006) internal successors, (25055), 13610 states have internal predecessors, (25055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:59,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13611 states to 13611 states and 25055 transitions. [2021-11-07 02:06:59,869 INFO L78 Accepts]: Start accepts. Automaton has 13611 states and 25055 transitions. Word has length 59 [2021-11-07 02:06:59,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:06:59,870 INFO L470 AbstractCegarLoop]: Abstraction has 13611 states and 25055 transitions. [2021-11-07 02:06:59,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 5 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:59,871 INFO L276 IsEmpty]: Start isEmpty. Operand 13611 states and 25055 transitions. [2021-11-07 02:06:59,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 02:06:59,881 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:06:59,881 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:06:59,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d69e41-c354-4309-966c-8aecf2cd9ff0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 02:07:00,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d69e41-c354-4309-966c-8aecf2cd9ff0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:07:00,096 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:07:00,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:07:00,097 INFO L85 PathProgramCache]: Analyzing trace with hash -705886877, now seen corresponding path program 1 times [2021-11-07 02:07:00,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:07:00,097 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [807748267] [2021-11-07 02:07:00,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:00,097 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:07:00,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d69e41-c354-4309-966c-8aecf2cd9ff0/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:07:00,098 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d69e41-c354-4309-966c-8aecf2cd9ff0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:07:00,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d69e41-c354-4309-966c-8aecf2cd9ff0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 02:07:00,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:00,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:07:00,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:00,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:00,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:00,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:00,936 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:07:00,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [807748267] [2021-11-07 02:07:00,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [807748267] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:07:00,937 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:07:00,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-07 02:07:00,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979613669] [2021-11-07 02:07:00,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:07:00,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:07:00,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:07:00,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:07:00,939 INFO L87 Difference]: Start difference. First operand 13611 states and 25055 transitions. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:06,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:07:06,392 INFO L93 Difference]: Finished difference Result 69958 states and 130498 transitions. [2021-11-07 02:07:06,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 02:07:06,392 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-07 02:07:06,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:07:06,486 INFO L225 Difference]: With dead ends: 69958 [2021-11-07 02:07:06,486 INFO L226 Difference]: Without dead ends: 56398 [2021-11-07 02:07:06,502 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-11-07 02:07:06,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56398 states. [2021-11-07 02:07:07,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56398 to 19430. [2021-11-07 02:07:07,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19430 states, 19425 states have (on average 1.8413899613899614) internal successors, (35769), 19429 states have internal predecessors, (35769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:07,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19430 states to 19430 states and 35769 transitions. [2021-11-07 02:07:07,641 INFO L78 Accepts]: Start accepts. Automaton has 19430 states and 35769 transitions. Word has length 71 [2021-11-07 02:07:07,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:07:07,642 INFO L470 AbstractCegarLoop]: Abstraction has 19430 states and 35769 transitions. [2021-11-07 02:07:07,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:07,642 INFO L276 IsEmpty]: Start isEmpty. Operand 19430 states and 35769 transitions. [2021-11-07 02:07:07,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 02:07:07,645 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:07:07,645 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:07:07,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d69e41-c354-4309-966c-8aecf2cd9ff0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 02:07:07,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d69e41-c354-4309-966c-8aecf2cd9ff0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:07:07,850 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:07:07,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:07:07,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1512675843, now seen corresponding path program 1 times [2021-11-07 02:07:07,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:07:07,851 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2031455799] [2021-11-07 02:07:07,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:07,851 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:07:07,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d69e41-c354-4309-966c-8aecf2cd9ff0/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:07:07,852 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d69e41-c354-4309-966c-8aecf2cd9ff0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:07:07,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d69e41-c354-4309-966c-8aecf2cd9ff0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 02:07:08,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:08,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:07:08,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:08,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:08,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:08,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:08,747 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:07:08,747 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2031455799] [2021-11-07 02:07:08,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2031455799] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:07:08,747 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:07:08,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 02:07:08,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443479958] [2021-11-07 02:07:08,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:07:08,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:07:08,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:07:08,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:07:08,749 INFO L87 Difference]: Start difference. First operand 19430 states and 35769 transitions. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:15,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:07:15,881 INFO L93 Difference]: Finished difference Result 93998 states and 174073 transitions. [2021-11-07 02:07:15,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 02:07:15,881 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 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 73 [2021-11-07 02:07:15,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:07:15,990 INFO L225 Difference]: With dead ends: 93998 [2021-11-07 02:07:15,990 INFO L226 Difference]: Without dead ends: 74618 [2021-11-07 02:07:16,011 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:07:16,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74618 states. [2021-11-07 02:07:17,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74618 to 25430. [2021-11-07 02:07:17,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25430 states, 25425 states have (on average 1.8392133726647002) internal successors, (46762), 25429 states have internal predecessors, (46762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:17,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25430 states to 25430 states and 46762 transitions. [2021-11-07 02:07:17,293 INFO L78 Accepts]: Start accepts. Automaton has 25430 states and 46762 transitions. Word has length 73 [2021-11-07 02:07:17,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:07:17,293 INFO L470 AbstractCegarLoop]: Abstraction has 25430 states and 46762 transitions. [2021-11-07 02:07:17,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:17,294 INFO L276 IsEmpty]: Start isEmpty. Operand 25430 states and 46762 transitions. [2021-11-07 02:07:17,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 02:07:17,297 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:07:17,298 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:07:17,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d69e41-c354-4309-966c-8aecf2cd9ff0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 02:07:17,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d69e41-c354-4309-966c-8aecf2cd9ff0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:07:17,515 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:07:17,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:07:17,515 INFO L85 PathProgramCache]: Analyzing trace with hash -152099058, now seen corresponding path program 1 times [2021-11-07 02:07:17,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:07:17,516 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1614289556] [2021-11-07 02:07:17,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:17,516 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:07:17,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d69e41-c354-4309-966c-8aecf2cd9ff0/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:07:17,517 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d69e41-c354-4309-966c-8aecf2cd9ff0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:07:17,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d69e41-c354-4309-966c-8aecf2cd9ff0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 02:07:17,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:17,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:07:17,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:18,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:18,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:18,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:18,367 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:07:18,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1614289556] [2021-11-07 02:07:18,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1614289556] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:07:18,368 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:07:18,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 02:07:18,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794240843] [2021-11-07 02:07:18,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:07:18,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:07:18,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:07:18,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:07:18,370 INFO L87 Difference]: Start difference. First operand 25430 states and 46762 transitions. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:28,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:07:28,687 INFO L93 Difference]: Finished difference Result 83836 states and 155214 transitions. [2021-11-07 02:07:28,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 02:07:28,687 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 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 74 [2021-11-07 02:07:28,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:07:28,781 INFO L225 Difference]: With dead ends: 83836 [2021-11-07 02:07:28,781 INFO L226 Difference]: Without dead ends: 59736 [2021-11-07 02:07:28,803 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:07:28,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59736 states. [2021-11-07 02:07:30,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59736 to 47730. [2021-11-07 02:07:30,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47730 states, 47725 states have (on average 1.844044002095338) internal successors, (88007), 47729 states have internal predecessors, (88007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:30,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47730 states to 47730 states and 88007 transitions. [2021-11-07 02:07:30,549 INFO L78 Accepts]: Start accepts. Automaton has 47730 states and 88007 transitions. Word has length 74 [2021-11-07 02:07:30,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:07:30,550 INFO L470 AbstractCegarLoop]: Abstraction has 47730 states and 88007 transitions. [2021-11-07 02:07:30,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:30,550 INFO L276 IsEmpty]: Start isEmpty. Operand 47730 states and 88007 transitions. [2021-11-07 02:07:30,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 02:07:30,554 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:07:30,554 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:07:30,564 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d69e41-c354-4309-966c-8aecf2cd9ff0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 02:07:30,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d69e41-c354-4309-966c-8aecf2cd9ff0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:07:30,757 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:07:30,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:07:30,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1740446960, now seen corresponding path program 1 times [2021-11-07 02:07:30,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:07:30,758 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1462307709] [2021-11-07 02:07:30,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:30,758 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:07:30,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d69e41-c354-4309-966c-8aecf2cd9ff0/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:07:30,759 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d69e41-c354-4309-966c-8aecf2cd9ff0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:07:30,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d69e41-c354-4309-966c-8aecf2cd9ff0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 02:07:31,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:31,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:07:31,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:31,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:31,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:31,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:31,763 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:07:31,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1462307709] [2021-11-07 02:07:31,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1462307709] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:07:31,763 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:07:31,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:07:31,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838456694] [2021-11-07 02:07:31,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:07:31,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:07:31,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:07:31,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:07:31,765 INFO L87 Difference]: Start difference. First operand 47730 states and 88007 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:39,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:07:39,191 INFO L93 Difference]: Finished difference Result 115798 states and 214040 transitions. [2021-11-07 02:07:39,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:07:39,191 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 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 74 [2021-11-07 02:07:39,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:07:39,283 INFO L225 Difference]: With dead ends: 115798 [2021-11-07 02:07:39,283 INFO L226 Difference]: Without dead ends: 69408 [2021-11-07 02:07:39,308 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:07:39,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69408 states. [2021-11-07 02:07:41,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69408 to 57142. [2021-11-07 02:07:41,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57142 states, 57137 states have (on average 1.835028090379264) internal successors, (104848), 57141 states have internal predecessors, (104848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:41,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57142 states to 57142 states and 104848 transitions. [2021-11-07 02:07:41,324 INFO L78 Accepts]: Start accepts. Automaton has 57142 states and 104848 transitions. Word has length 74 [2021-11-07 02:07:41,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:07:41,324 INFO L470 AbstractCegarLoop]: Abstraction has 57142 states and 104848 transitions. [2021-11-07 02:07:41,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:41,325 INFO L276 IsEmpty]: Start isEmpty. Operand 57142 states and 104848 transitions. [2021-11-07 02:07:41,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 02:07:41,327 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:07:41,327 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:07:41,348 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d69e41-c354-4309-966c-8aecf2cd9ff0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 02:07:41,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d69e41-c354-4309-966c-8aecf2cd9ff0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:07:41,541 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:07:41,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:07:41,542 INFO L85 PathProgramCache]: Analyzing trace with hash -233700474, now seen corresponding path program 1 times [2021-11-07 02:07:41,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:07:41,542 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [186942304] [2021-11-07 02:07:41,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:41,542 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:07:41,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d69e41-c354-4309-966c-8aecf2cd9ff0/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:07:41,543 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d69e41-c354-4309-966c-8aecf2cd9ff0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:07:41,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96d69e41-c354-4309-966c-8aecf2cd9ff0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 02:07:42,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:42,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:07:42,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:42,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:42,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:42,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:42,805 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:07:42,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [186942304] [2021-11-07 02:07:42,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [186942304] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:07:42,805 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:07:42,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 02:07:42,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310323656] [2021-11-07 02:07:42,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:07:42,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:07:42,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:07:42,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:07:42,806 INFO L87 Difference]: Start difference. First operand 57142 states and 104848 transitions. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)