./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec11_product32.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_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/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_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec11_product32.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/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_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/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 8b874c7ae88f1b18d69b67ffc194fd453f07c437ad434b3d3b7312d25946d05f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:26:52,713 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:26:52,716 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:26:52,765 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:26:52,765 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:26:52,775 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:26:52,777 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:26:52,786 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:26:52,790 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:26:52,800 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:26:52,801 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:26:52,803 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:26:52,803 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:26:52,805 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:26:52,806 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:26:52,808 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:26:52,810 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:26:52,811 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:26:52,817 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:26:52,827 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:26:52,829 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:26:52,831 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:26:52,838 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:26:52,839 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:26:52,844 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:26:52,844 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:26:52,845 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:26:52,846 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:26:52,847 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:26:52,848 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:26:52,848 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:26:52,850 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:26:52,851 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:26:52,852 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:26:52,853 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:26:52,853 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:26:52,854 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:26:52,855 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:26:52,855 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:26:52,856 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:26:52,857 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:26:52,858 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:26:52,905 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:26:52,905 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:26:52,906 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:26:52,906 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:26:52,907 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:26:52,907 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:26:52,907 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:26:52,907 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:26:52,908 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:26:52,908 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:26:52,908 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:26:52,908 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:26:52,909 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:26:52,909 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:26:52,909 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:26:52,910 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:26:52,910 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:26:52,911 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:26:52,911 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:26:52,911 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:26:52,912 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:26:52,912 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:26:52,912 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:26:52,912 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:26:52,913 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:26:52,913 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:26:52,913 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:26:52,913 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:26:52,914 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:26:52,914 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:26:52,914 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:26:52,915 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:26:52,915 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:26:52,915 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:26:52,915 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:26:52,916 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:26:52,916 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:26:52,916 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:26:52,916 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:26:52,917 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_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8b874c7ae88f1b18d69b67ffc194fd453f07c437ad434b3d3b7312d25946d05f [2021-11-07 01:26:53,254 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:26:53,292 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:26:53,295 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:26:53,297 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:26:53,301 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:26:53,302 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec11_product32.cil.c [2021-11-07 01:26:53,388 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/data/03613c0ba/1826d05129ba4f45afe5012be266d865/FLAG660482648 [2021-11-07 01:26:54,174 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:26:54,182 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/sv-benchmarks/c/product-lines/email_spec11_product32.cil.c [2021-11-07 01:26:54,220 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/data/03613c0ba/1826d05129ba4f45afe5012be266d865/FLAG660482648 [2021-11-07 01:26:54,400 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/data/03613c0ba/1826d05129ba4f45afe5012be266d865 [2021-11-07 01:26:54,403 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:26:54,405 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:26:54,414 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:26:54,415 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:26:54,419 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:26:54,421 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:26:54" (1/1) ... [2021-11-07 01:26:54,423 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29658d8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:26:54, skipping insertion in model container [2021-11-07 01:26:54,423 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:26:54" (1/1) ... [2021-11-07 01:26:54,433 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:26:54,537 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:26:55,172 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_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/sv-benchmarks/c/product-lines/email_spec11_product32.cil.c[45976,45989] [2021-11-07 01:26:55,308 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:26:55,341 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-07 01:26:55,342 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2a314744 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:26:55, skipping insertion in model container [2021-11-07 01:26:55,342 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:26:55,343 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:26:55,345 INFO L168 Benchmark]: Toolchain (without parser) took 939.21 ms. Allocated memory is still 115.3 MB. Free memory was 70.8 MB in the beginning and 75.7 MB in the end (delta: -4.9 MB). Peak memory consumption was 9.0 MB. Max. memory is 16.1 GB. [2021-11-07 01:26:55,347 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 115.3 MB. Free memory was 89.9 MB in the beginning and 89.8 MB in the end (delta: 66.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:26:55,350 INFO L168 Benchmark]: CACSL2BoogieTranslator took 928.20 ms. Allocated memory is still 115.3 MB. Free memory was 70.6 MB in the beginning and 75.7 MB in the end (delta: -5.1 MB). Peak memory consumption was 9.0 MB. Max. memory is 16.1 GB. [2021-11-07 01:26:55,353 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 115.3 MB. Free memory was 89.9 MB in the beginning and 89.8 MB in the end (delta: 66.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 928.20 ms. Allocated memory is still 115.3 MB. Free memory was 70.6 MB in the beginning and 75.7 MB in the end (delta: -5.1 MB). Peak memory consumption was 9.0 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1661]: 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_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/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_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec11_product32.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/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_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/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 8b874c7ae88f1b18d69b67ffc194fd453f07c437ad434b3d3b7312d25946d05f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:26:58,034 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:26:58,037 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:26:58,095 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:26:58,096 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:26:58,102 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:26:58,105 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:26:58,111 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:26:58,116 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:26:58,128 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:26:58,130 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:26:58,133 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:26:58,133 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:26:58,137 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:26:58,141 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:26:58,147 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:26:58,149 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:26:58,152 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:26:58,155 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:26:58,166 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:26:58,169 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:26:58,171 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:26:58,175 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:26:58,178 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:26:58,183 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:26:58,184 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:26:58,184 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:26:58,187 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:26:58,187 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:26:58,189 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:26:58,190 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:26:58,192 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:26:58,194 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:26:58,195 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:26:58,198 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:26:58,198 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:26:58,199 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:26:58,200 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:26:58,200 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:26:58,203 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:26:58,204 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:26:58,205 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:26:58,262 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:26:58,262 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:26:58,264 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:26:58,264 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:26:58,265 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:26:58,265 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:26:58,265 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:26:58,265 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:26:58,266 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:26:58,268 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:26:58,269 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:26:58,270 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:26:58,270 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:26:58,270 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:26:58,271 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:26:58,271 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:26:58,271 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:26:58,271 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:26:58,272 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:26:58,272 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:26:58,272 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:26:58,273 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:26:58,273 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:26:58,273 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:26:58,273 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:26:58,274 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:26:58,274 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:26:58,274 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:26:58,275 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:26:58,275 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:26:58,275 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:26:58,276 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:26:58,276 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:26:58,276 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:26:58,277 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:26:58,277 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_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8b874c7ae88f1b18d69b67ffc194fd453f07c437ad434b3d3b7312d25946d05f [2021-11-07 01:26:58,788 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:26:58,831 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:26:58,834 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:26:58,836 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:26:58,837 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:26:58,838 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec11_product32.cil.c [2021-11-07 01:26:58,924 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/data/3439efb11/7715fc52f9f6415fa458fe07f8228d55/FLAGf88017096 [2021-11-07 01:26:59,877 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:26:59,878 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/sv-benchmarks/c/product-lines/email_spec11_product32.cil.c [2021-11-07 01:26:59,932 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/data/3439efb11/7715fc52f9f6415fa458fe07f8228d55/FLAGf88017096 [2021-11-07 01:26:59,984 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/data/3439efb11/7715fc52f9f6415fa458fe07f8228d55 [2021-11-07 01:26:59,987 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:26:59,988 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:26:59,990 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:26:59,990 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:26:59,999 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:27:00,004 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:26:59" (1/1) ... [2021-11-07 01:27:00,006 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4212a802 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:27:00, skipping insertion in model container [2021-11-07 01:27:00,008 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:26:59" (1/1) ... [2021-11-07 01:27:00,017 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:27:00,125 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:27:00,901 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_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/sv-benchmarks/c/product-lines/email_spec11_product32.cil.c[45976,45989] [2021-11-07 01:27:01,017 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:27:01,035 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:27:01,052 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:27:01,157 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_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/sv-benchmarks/c/product-lines/email_spec11_product32.cil.c[45976,45989] [2021-11-07 01:27:01,215 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:27:01,229 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:27:01,342 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_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/sv-benchmarks/c/product-lines/email_spec11_product32.cil.c[45976,45989] [2021-11-07 01:27:01,386 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:27:01,452 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:27:01,453 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:27:01 WrapperNode [2021-11-07 01:27:01,453 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:27:01,455 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:27:01,456 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:27:01,456 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:27:01,465 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:27:01" (1/1) ... [2021-11-07 01:27:01,543 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:27:01" (1/1) ... [2021-11-07 01:27:01,702 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:27:01,703 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:27:01,704 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:27:01,704 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:27:01,714 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:27:01" (1/1) ... [2021-11-07 01:27:01,715 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:27:01" (1/1) ... [2021-11-07 01:27:01,732 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:27:01" (1/1) ... [2021-11-07 01:27:01,732 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:27:01" (1/1) ... [2021-11-07 01:27:01,838 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:27:01" (1/1) ... [2021-11-07 01:27:01,879 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:27:01" (1/1) ... [2021-11-07 01:27:01,889 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:27:01" (1/1) ... [2021-11-07 01:27:01,912 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:27:01,913 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:27:01,913 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:27:01,914 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:27:01,915 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:27:01" (1/1) ... [2021-11-07 01:27:01,923 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:27:01,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:27:01,992 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:27:02,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:27:02,042 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 01:27:02,043 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:27:02,043 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:27:02,043 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:27:02,044 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:27:08,771 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:27:08,772 INFO L299 CfgBuilder]: Removed 693 assume(true) statements. [2021-11-07 01:27:08,775 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:27:08 BoogieIcfgContainer [2021-11-07 01:27:08,776 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:27:08,778 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:27:08,778 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:27:08,781 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:27:08,782 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:26:59" (1/3) ... [2021-11-07 01:27:08,783 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6897746d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:27:08, skipping insertion in model container [2021-11-07 01:27:08,783 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:27:01" (2/3) ... [2021-11-07 01:27:08,783 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6897746d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:27:08, skipping insertion in model container [2021-11-07 01:27:08,783 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:27:08" (3/3) ... [2021-11-07 01:27:08,785 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec11_product32.cil.c [2021-11-07 01:27:08,791 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:27:08,792 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-11-07 01:27:08,855 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:27:08,862 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 01:27:08,863 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-11-07 01:27:08,907 INFO L276 IsEmpty]: Start isEmpty. Operand has 1068 states, 1061 states have (on average 1.7492931196983978) internal successors, (1856), 1067 states have internal predecessors, (1856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:08,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 01:27:08,930 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:27:08,931 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:27:08,932 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:27:08,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:27:08,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1125206193, now seen corresponding path program 1 times [2021-11-07 01:27:08,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:27:08,987 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1099391774] [2021-11-07 01:27:08,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:27:08,989 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:27:08,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:27:08,993 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:27:09,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:27:09,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:27:09,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:27:09,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:27:09,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:27:09,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:27:10,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:27:10,090 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:27:10,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1099391774] [2021-11-07 01:27:10,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1099391774] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:27:10,092 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:27:10,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:27:10,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422962901] [2021-11-07 01:27:10,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:27:10,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:27:10,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:27:10,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:27:10,125 INFO L87 Difference]: Start difference. First operand has 1068 states, 1061 states have (on average 1.7492931196983978) internal successors, (1856), 1067 states have internal predecessors, (1856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 32.5) internal successors, (65), 2 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:10,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:27:10,250 INFO L93 Difference]: Finished difference Result 1851 states and 3189 transitions. [2021-11-07 01:27:10,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:27:10,252 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 32.5) internal successors, (65), 2 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-07 01:27:10,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:27:10,288 INFO L225 Difference]: With dead ends: 1851 [2021-11-07 01:27:10,289 INFO L226 Difference]: Without dead ends: 1050 [2021-11-07 01:27:10,300 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:27:10,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1050 states. [2021-11-07 01:27:10,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1050 to 1050. [2021-11-07 01:27:10,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1050 states, 1044 states have (on average 1.7404214559386972) internal successors, (1817), 1049 states have internal predecessors, (1817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:10,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1050 states to 1050 states and 1817 transitions. [2021-11-07 01:27:10,454 INFO L78 Accepts]: Start accepts. Automaton has 1050 states and 1817 transitions. Word has length 65 [2021-11-07 01:27:10,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:27:10,455 INFO L470 AbstractCegarLoop]: Abstraction has 1050 states and 1817 transitions. [2021-11-07 01:27:10,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 32.5) internal successors, (65), 2 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:10,456 INFO L276 IsEmpty]: Start isEmpty. Operand 1050 states and 1817 transitions. [2021-11-07 01:27:10,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 01:27:10,464 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:27:10,465 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:27:10,490 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:27:10,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:27:10,684 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:27:10,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:27:10,685 INFO L85 PathProgramCache]: Analyzing trace with hash 2032339735, now seen corresponding path program 1 times [2021-11-07 01:27:10,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:27:10,686 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1252808450] [2021-11-07 01:27:10,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:27:10,687 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:27:10,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:27:10,688 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:27:10,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:27:11,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:27:11,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:27:11,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:27:11,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:27:11,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:27:11,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:27:11,801 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:27:11,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1252808450] [2021-11-07 01:27:11,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1252808450] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:27:11,802 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:27:11,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:27:11,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809872958] [2021-11-07 01:27:11,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:27:11,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:27:11,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:27:11,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:27:11,811 INFO L87 Difference]: Start difference. First operand 1050 states and 1817 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:12,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:27:12,028 INFO L93 Difference]: Finished difference Result 3120 states and 5403 transitions. [2021-11-07 01:27:12,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:27:12,029 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-07 01:27:12,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:27:12,047 INFO L225 Difference]: With dead ends: 3120 [2021-11-07 01:27:12,047 INFO L226 Difference]: Without dead ends: 2085 [2021-11-07 01:27:12,051 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:27:12,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2085 states. [2021-11-07 01:27:12,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2085 to 1049. [2021-11-07 01:27:12,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1049 states, 1043 states have (on average 1.7372962607861937) internal successors, (1812), 1048 states have internal predecessors, (1812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:12,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1049 states to 1049 states and 1812 transitions. [2021-11-07 01:27:12,176 INFO L78 Accepts]: Start accepts. Automaton has 1049 states and 1812 transitions. Word has length 66 [2021-11-07 01:27:12,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:27:12,177 INFO L470 AbstractCegarLoop]: Abstraction has 1049 states and 1812 transitions. [2021-11-07 01:27:12,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:12,177 INFO L276 IsEmpty]: Start isEmpty. Operand 1049 states and 1812 transitions. [2021-11-07 01:27:12,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 01:27:12,182 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:27:12,182 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:27:12,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:27:12,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:27:12,404 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:27:12,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:27:12,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1374871665, now seen corresponding path program 1 times [2021-11-07 01:27:12,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:27:12,407 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [831688897] [2021-11-07 01:27:12,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:27:12,409 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:27:12,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:27:12,410 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:27:12,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:27:12,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:27:12,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:27:12,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:27:13,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:27:13,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:27:13,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:27:13,449 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:27:13,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [831688897] [2021-11-07 01:27:13,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [831688897] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:27:13,450 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:27:13,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:27:13,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327184454] [2021-11-07 01:27:13,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:27:13,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:27:13,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:27:13,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:27:13,452 INFO L87 Difference]: Start difference. First operand 1049 states and 1812 transitions. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 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 01:27:13,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:27:13,980 INFO L93 Difference]: Finished difference Result 4113 states and 7110 transitions. [2021-11-07 01:27:13,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:27:13,980 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 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 68 [2021-11-07 01:27:13,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:27:14,004 INFO L225 Difference]: With dead ends: 4113 [2021-11-07 01:27:14,004 INFO L226 Difference]: Without dead ends: 3082 [2021-11-07 01:27:14,007 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:27:14,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3082 states. [2021-11-07 01:27:14,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3082 to 1048. [2021-11-07 01:27:14,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1048 states, 1042 states have (on average 1.7351247600767754) internal successors, (1808), 1047 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:14,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1048 states to 1048 states and 1808 transitions. [2021-11-07 01:27:14,107 INFO L78 Accepts]: Start accepts. Automaton has 1048 states and 1808 transitions. Word has length 68 [2021-11-07 01:27:14,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:27:14,108 INFO L470 AbstractCegarLoop]: Abstraction has 1048 states and 1808 transitions. [2021-11-07 01:27:14,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 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 01:27:14,110 INFO L276 IsEmpty]: Start isEmpty. Operand 1048 states and 1808 transitions. [2021-11-07 01:27:14,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 01:27:14,114 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:27:14,114 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] [2021-11-07 01:27:14,140 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:27:14,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:27:14,339 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:27:14,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:27:14,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1539859774, now seen corresponding path program 1 times [2021-11-07 01:27:14,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:27:14,341 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1961415366] [2021-11-07 01:27:14,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:27:14,342 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:27:14,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:27:14,347 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:27:14,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:27:14,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:27:14,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:27:14,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:27:15,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:27:15,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:27:15,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:27:15,385 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:27:15,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1961415366] [2021-11-07 01:27:15,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1961415366] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:27:15,387 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:27:15,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:27:15,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652623032] [2021-11-07 01:27:15,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:27:15,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:27:15,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:27:15,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:27:15,392 INFO L87 Difference]: Start difference. First operand 1048 states and 1808 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:15,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:27:15,526 INFO L93 Difference]: Finished difference Result 2093 states and 3613 transitions. [2021-11-07 01:27:15,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:27:15,527 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-07 01:27:15,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:27:15,535 INFO L225 Difference]: With dead ends: 2093 [2021-11-07 01:27:15,535 INFO L226 Difference]: Without dead ends: 1053 [2021-11-07 01:27:15,537 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:27:15,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1053 states. [2021-11-07 01:27:15,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1053 to 1048. [2021-11-07 01:27:15,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1048 states, 1042 states have (on average 1.7322456813819578) internal successors, (1805), 1047 states have internal predecessors, (1805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:15,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1048 states to 1048 states and 1805 transitions. [2021-11-07 01:27:15,610 INFO L78 Accepts]: Start accepts. Automaton has 1048 states and 1805 transitions. Word has length 69 [2021-11-07 01:27:15,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:27:15,611 INFO L470 AbstractCegarLoop]: Abstraction has 1048 states and 1805 transitions. [2021-11-07 01:27:15,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:15,611 INFO L276 IsEmpty]: Start isEmpty. Operand 1048 states and 1805 transitions. [2021-11-07 01:27:15,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 01:27:15,613 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:27:15,613 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] [2021-11-07 01:27:15,637 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:27:15,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:27:15,830 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:27:15,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:27:15,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1646629513, now seen corresponding path program 1 times [2021-11-07 01:27:15,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:27:15,832 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [34270209] [2021-11-07 01:27:15,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:27:15,832 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:27:15,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:27:15,833 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:27:15,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:27:16,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:27:16,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:27:16,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:27:16,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:27:16,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:27:16,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:27:16,888 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:27:16,888 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [34270209] [2021-11-07 01:27:16,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [34270209] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:27:16,889 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:27:16,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:27:16,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113120970] [2021-11-07 01:27:16,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:27:16,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:27:16,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:27:16,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:27:16,896 INFO L87 Difference]: Start difference. First operand 1048 states and 1805 transitions. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 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 01:27:17,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:27:17,350 INFO L93 Difference]: Finished difference Result 4100 states and 7086 transitions. [2021-11-07 01:27:17,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:27:17,351 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 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 70 [2021-11-07 01:27:17,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:27:17,407 INFO L225 Difference]: With dead ends: 4100 [2021-11-07 01:27:17,407 INFO L226 Difference]: Without dead ends: 3078 [2021-11-07 01:27:17,410 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:27:17,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3078 states. [2021-11-07 01:27:17,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3078 to 1048. [2021-11-07 01:27:17,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1048 states, 1042 states have (on average 1.7293666026871402) internal successors, (1802), 1047 states have internal predecessors, (1802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:17,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1048 states to 1048 states and 1802 transitions. [2021-11-07 01:27:17,516 INFO L78 Accepts]: Start accepts. Automaton has 1048 states and 1802 transitions. Word has length 70 [2021-11-07 01:27:17,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:27:17,517 INFO L470 AbstractCegarLoop]: Abstraction has 1048 states and 1802 transitions. [2021-11-07 01:27:17,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 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 01:27:17,517 INFO L276 IsEmpty]: Start isEmpty. Operand 1048 states and 1802 transitions. [2021-11-07 01:27:17,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 01:27:17,519 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:27:17,519 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] [2021-11-07 01:27:17,543 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:27:17,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:27:17,739 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:27:17,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:27:17,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1603979538, now seen corresponding path program 1 times [2021-11-07 01:27:17,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:27:17,740 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1270929181] [2021-11-07 01:27:17,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:27:17,741 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:27:17,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:27:17,742 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:27:17,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:27:18,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:27:18,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:27:18,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:27:18,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:27:18,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:27:18,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:27:18,738 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:27:18,738 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1270929181] [2021-11-07 01:27:18,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1270929181] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:27:18,738 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:27:18,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:27:18,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473252822] [2021-11-07 01:27:18,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:27:18,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:27:18,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:27:18,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:27:18,740 INFO L87 Difference]: Start difference. First operand 1048 states and 1802 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:18,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:27:18,946 INFO L93 Difference]: Finished difference Result 2835 states and 4871 transitions. [2021-11-07 01:27:18,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:27:18,947 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-07 01:27:18,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:27:18,962 INFO L225 Difference]: With dead ends: 2835 [2021-11-07 01:27:18,962 INFO L226 Difference]: Without dead ends: 2070 [2021-11-07 01:27:18,964 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:27:18,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2070 states. [2021-11-07 01:27:19,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2070 to 1305. [2021-11-07 01:27:19,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1305 states, 1299 states have (on average 1.7513471901462663) internal successors, (2275), 1304 states have internal predecessors, (2275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:19,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1305 states to 1305 states and 2275 transitions. [2021-11-07 01:27:19,095 INFO L78 Accepts]: Start accepts. Automaton has 1305 states and 2275 transitions. Word has length 72 [2021-11-07 01:27:19,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:27:19,096 INFO L470 AbstractCegarLoop]: Abstraction has 1305 states and 2275 transitions. [2021-11-07 01:27:19,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:19,096 INFO L276 IsEmpty]: Start isEmpty. Operand 1305 states and 2275 transitions. [2021-11-07 01:27:19,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-07 01:27:19,099 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:27:19,099 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:27:19,121 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:27:19,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:27:19,317 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:27:19,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:27:19,318 INFO L85 PathProgramCache]: Analyzing trace with hash -162862659, now seen corresponding path program 1 times [2021-11-07 01:27:19,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:27:19,319 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [166755613] [2021-11-07 01:27:19,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:27:19,319 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:27:19,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:27:19,320 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:27:19,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:27:19,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:27:19,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 562 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:27:19,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:27:20,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:27:20,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:27:20,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:27:20,362 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:27:20,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [166755613] [2021-11-07 01:27:20,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [166755613] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:27:20,363 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:27:20,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:27:20,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891253766] [2021-11-07 01:27:20,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:27:20,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:27:20,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:27:20,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:27:20,365 INFO L87 Difference]: Start difference. First operand 1305 states and 2275 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:20,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:27:20,560 INFO L93 Difference]: Finished difference Result 3496 states and 6091 transitions. [2021-11-07 01:27:20,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:27:20,561 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-11-07 01:27:20,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:27:20,576 INFO L225 Difference]: With dead ends: 3496 [2021-11-07 01:27:20,577 INFO L226 Difference]: Without dead ends: 2275 [2021-11-07 01:27:20,581 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:27:20,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2275 states. [2021-11-07 01:27:20,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2275 to 1510. [2021-11-07 01:27:20,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1510 states, 1504 states have (on average 1.7626329787234043) internal successors, (2651), 1509 states have internal predecessors, (2651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:20,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1510 states to 1510 states and 2651 transitions. [2021-11-07 01:27:20,745 INFO L78 Accepts]: Start accepts. Automaton has 1510 states and 2651 transitions. Word has length 84 [2021-11-07 01:27:20,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:27:20,746 INFO L470 AbstractCegarLoop]: Abstraction has 1510 states and 2651 transitions. [2021-11-07 01:27:20,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:20,746 INFO L276 IsEmpty]: Start isEmpty. Operand 1510 states and 2651 transitions. [2021-11-07 01:27:20,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-07 01:27:20,749 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:27:20,749 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:27:20,774 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:27:20,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:27:20,967 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:27:20,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:27:20,967 INFO L85 PathProgramCache]: Analyzing trace with hash -2123153602, now seen corresponding path program 1 times [2021-11-07 01:27:20,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:27:20,968 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [92576480] [2021-11-07 01:27:20,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:27:20,969 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:27:20,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:27:20,970 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:27:21,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:27:21,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:27:21,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:27:21,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:27:21,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:27:21,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:27:22,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:27:22,140 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:27:22,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [92576480] [2021-11-07 01:27:22,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [92576480] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:27:22,140 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:27:22,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:27:22,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935762233] [2021-11-07 01:27:22,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:27:22,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:27:22,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:27:22,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:27:22,142 INFO L87 Difference]: Start difference. First operand 1510 states and 2651 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:22,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:27:22,448 INFO L93 Difference]: Finished difference Result 4143 states and 7284 transitions. [2021-11-07 01:27:22,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:27:22,449 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-11-07 01:27:22,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:27:22,467 INFO L225 Difference]: With dead ends: 4143 [2021-11-07 01:27:22,467 INFO L226 Difference]: Without dead ends: 2725 [2021-11-07 01:27:22,470 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:27:22,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2725 states. [2021-11-07 01:27:22,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2725 to 1960. [2021-11-07 01:27:22,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1960 states, 1954 states have (on average 1.7804503582395086) internal successors, (3479), 1959 states have internal predecessors, (3479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:22,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1960 states to 1960 states and 3479 transitions. [2021-11-07 01:27:22,643 INFO L78 Accepts]: Start accepts. Automaton has 1960 states and 3479 transitions. Word has length 85 [2021-11-07 01:27:22,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:27:22,643 INFO L470 AbstractCegarLoop]: Abstraction has 1960 states and 3479 transitions. [2021-11-07 01:27:22,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:22,644 INFO L276 IsEmpty]: Start isEmpty. Operand 1960 states and 3479 transitions. [2021-11-07 01:27:22,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-07 01:27:22,648 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:27:22,648 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:27:22,668 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-11-07 01:27:22,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:27:22,862 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:27:22,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:27:22,862 INFO L85 PathProgramCache]: Analyzing trace with hash -462600625, now seen corresponding path program 1 times [2021-11-07 01:27:22,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:27:22,864 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [521069720] [2021-11-07 01:27:22,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:27:22,864 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:27:22,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:27:22,866 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:27:22,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:27:23,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:27:23,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 566 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:27:23,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:27:23,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:27:23,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:27:24,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:27:24,055 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:27:24,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [521069720] [2021-11-07 01:27:24,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [521069720] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:27:24,055 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:27:24,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:27:24,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358736671] [2021-11-07 01:27:24,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:27:24,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:27:24,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:27:24,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:27:24,057 INFO L87 Difference]: Start difference. First operand 1960 states and 3479 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:24,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:27:24,334 INFO L93 Difference]: Finished difference Result 5473 states and 9737 transitions. [2021-11-07 01:27:24,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:27:24,334 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-11-07 01:27:24,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:27:24,362 INFO L225 Difference]: With dead ends: 5473 [2021-11-07 01:27:24,362 INFO L226 Difference]: Without dead ends: 3613 [2021-11-07 01:27:24,367 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:27:24,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3613 states. [2021-11-07 01:27:24,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3613 to 2848. [2021-11-07 01:27:24,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2848 states, 2842 states have (on average 1.7994370161857847) internal successors, (5114), 2847 states have internal predecessors, (5114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:24,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2848 states to 2848 states and 5114 transitions. [2021-11-07 01:27:24,622 INFO L78 Accepts]: Start accepts. Automaton has 2848 states and 5114 transitions. Word has length 86 [2021-11-07 01:27:24,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:27:24,622 INFO L470 AbstractCegarLoop]: Abstraction has 2848 states and 5114 transitions. [2021-11-07 01:27:24,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:24,623 INFO L276 IsEmpty]: Start isEmpty. Operand 2848 states and 5114 transitions. [2021-11-07 01:27:24,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-07 01:27:24,629 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:27:24,630 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:27:24,653 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:27:24,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:27:24,847 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:27:24,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:27:24,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1674598607, now seen corresponding path program 1 times [2021-11-07 01:27:24,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:27:24,848 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1885626] [2021-11-07 01:27:24,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:27:24,849 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:27:24,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:27:24,851 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:27:24,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:27:25,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:27:25,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:27:25,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:27:25,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:27:25,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:27:26,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:27:26,040 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:27:26,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1885626] [2021-11-07 01:27:26,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1885626] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:27:26,041 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:27:26,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:27:26,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696004774] [2021-11-07 01:27:26,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:27:26,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:27:26,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:27:26,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:27:26,043 INFO L87 Difference]: Start difference. First operand 2848 states and 5114 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:26,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:27:26,415 INFO L93 Difference]: Finished difference Result 7873 states and 14161 transitions. [2021-11-07 01:27:26,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:27:26,416 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-11-07 01:27:26,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:27:26,472 INFO L225 Difference]: With dead ends: 7873 [2021-11-07 01:27:26,473 INFO L226 Difference]: Without dead ends: 5159 [2021-11-07 01:27:26,477 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:27:26,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5159 states. [2021-11-07 01:27:26,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5159 to 4394. [2021-11-07 01:27:26,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4394 states, 4388 states have (on average 1.813810391978122) internal successors, (7959), 4393 states have internal predecessors, (7959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:26,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4394 states to 4394 states and 7959 transitions. [2021-11-07 01:27:26,842 INFO L78 Accepts]: Start accepts. Automaton has 4394 states and 7959 transitions. Word has length 87 [2021-11-07 01:27:26,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:27:26,842 INFO L470 AbstractCegarLoop]: Abstraction has 4394 states and 7959 transitions. [2021-11-07 01:27:26,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:26,843 INFO L276 IsEmpty]: Start isEmpty. Operand 4394 states and 7959 transitions. [2021-11-07 01:27:26,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-07 01:27:26,855 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:27:26,855 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:27:26,882 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:27:27,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:27:27,074 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:27:27,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:27:27,074 INFO L85 PathProgramCache]: Analyzing trace with hash -997839682, now seen corresponding path program 1 times [2021-11-07 01:27:27,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:27:27,075 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1937379873] [2021-11-07 01:27:27,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:27:27,075 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:27:27,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:27:27,076 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:27:27,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:27:27,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:27:27,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:27:27,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:27:28,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:27:28,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:27:28,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:27:28,309 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:27:28,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1937379873] [2021-11-07 01:27:28,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1937379873] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:27:28,310 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:27:28,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:27:28,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966517782] [2021-11-07 01:27:28,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:27:28,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:27:28,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:27:28,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:27:28,312 INFO L87 Difference]: Start difference. First operand 4394 states and 7959 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 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 01:27:28,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:27:28,829 INFO L93 Difference]: Finished difference Result 12227 states and 22179 transitions. [2021-11-07 01:27:28,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:27:28,830 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 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 88 [2021-11-07 01:27:28,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:27:28,856 INFO L225 Difference]: With dead ends: 12227 [2021-11-07 01:27:28,856 INFO L226 Difference]: Without dead ends: 8001 [2021-11-07 01:27:28,864 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:27:28,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8001 states. [2021-11-07 01:27:29,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8001 to 7236. [2021-11-07 01:27:29,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7236 states, 7230 states have (on average 1.8235131396957123) internal successors, (13184), 7235 states have internal predecessors, (13184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:29,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7236 states to 7236 states and 13184 transitions. [2021-11-07 01:27:29,441 INFO L78 Accepts]: Start accepts. Automaton has 7236 states and 13184 transitions. Word has length 88 [2021-11-07 01:27:29,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:27:29,441 INFO L470 AbstractCegarLoop]: Abstraction has 7236 states and 13184 transitions. [2021-11-07 01:27:29,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 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 01:27:29,443 INFO L276 IsEmpty]: Start isEmpty. Operand 7236 states and 13184 transitions. [2021-11-07 01:27:29,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-07 01:27:29,456 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:27:29,456 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:27:29,484 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:27:29,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:27:29,674 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:27:29,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:27:29,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1023552606, now seen corresponding path program 1 times [2021-11-07 01:27:29,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:27:29,676 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1984015624] [2021-11-07 01:27:29,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:27:29,676 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:27:29,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:27:29,677 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:27:29,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:27:30,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:27:30,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 572 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:27:30,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:27:30,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:27:30,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:27:30,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:27:30,841 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:27:30,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1984015624] [2021-11-07 01:27:30,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1984015624] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:27:30,841 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:27:30,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:27:30,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002630095] [2021-11-07 01:27:30,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:27:30,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:27:30,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:27:30,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:27:30,844 INFO L87 Difference]: Start difference. First operand 7236 states and 13184 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:31,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:27:31,498 INFO L93 Difference]: Finished difference Result 21211 states and 38696 transitions. [2021-11-07 01:27:31,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:27:31,498 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 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 89 [2021-11-07 01:27:31,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:27:31,546 INFO L225 Difference]: With dead ends: 21211 [2021-11-07 01:27:31,546 INFO L226 Difference]: Without dead ends: 14147 [2021-11-07 01:27:31,557 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:27:31,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14147 states. [2021-11-07 01:27:32,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14147 to 13382. [2021-11-07 01:27:32,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13382 states, 13376 states have (on average 1.829022129186603) internal successors, (24465), 13381 states have internal predecessors, (24465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:32,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13382 states to 13382 states and 24465 transitions. [2021-11-07 01:27:32,483 INFO L78 Accepts]: Start accepts. Automaton has 13382 states and 24465 transitions. Word has length 89 [2021-11-07 01:27:32,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:27:32,484 INFO L470 AbstractCegarLoop]: Abstraction has 13382 states and 24465 transitions. [2021-11-07 01:27:32,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:32,484 INFO L276 IsEmpty]: Start isEmpty. Operand 13382 states and 24465 transitions. [2021-11-07 01:27:32,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-07 01:27:32,505 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:27:32,506 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:27:32,530 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:27:32,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:27:32,725 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:27:32,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:27:32,725 INFO L85 PathProgramCache]: Analyzing trace with hash 135132238, now seen corresponding path program 1 times [2021-11-07 01:27:32,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:27:32,726 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2114017093] [2021-11-07 01:27:32,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:27:32,726 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:27:32,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:27:32,728 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:27:32,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:27:33,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:27:33,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 582 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:27:33,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:27:33,758 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:27:33,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:27:34,031 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:27:34,031 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:27:34,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2114017093] [2021-11-07 01:27:34,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2114017093] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:27:34,032 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:27:34,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:27:34,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898483935] [2021-11-07 01:27:34,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:27:34,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:27:34,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:27:34,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:27:34,033 INFO L87 Difference]: Start difference. First operand 13382 states and 24465 transitions. Second operand has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:37,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:27:37,332 INFO L93 Difference]: Finished difference Result 33315 states and 60886 transitions. [2021-11-07 01:27:37,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:27:37,333 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-11-07 01:27:37,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:27:37,393 INFO L225 Difference]: With dead ends: 33315 [2021-11-07 01:27:37,394 INFO L226 Difference]: Without dead ends: 20226 [2021-11-07 01:27:37,413 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:27:37,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20226 states. [2021-11-07 01:27:38,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20226 to 13349. [2021-11-07 01:27:38,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13349 states, 13343 states have (on average 1.82365285168253) internal successors, (24333), 13348 states have internal predecessors, (24333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:38,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13349 states to 13349 states and 24333 transitions. [2021-11-07 01:27:38,280 INFO L78 Accepts]: Start accepts. Automaton has 13349 states and 24333 transitions. Word has length 90 [2021-11-07 01:27:38,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:27:38,280 INFO L470 AbstractCegarLoop]: Abstraction has 13349 states and 24333 transitions. [2021-11-07 01:27:38,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:38,281 INFO L276 IsEmpty]: Start isEmpty. Operand 13349 states and 24333 transitions. [2021-11-07 01:27:38,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-07 01:27:38,300 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:27:38,300 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:27:38,324 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-11-07 01:27:38,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:27:38,520 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:27:38,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:27:38,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1048192721, now seen corresponding path program 1 times [2021-11-07 01:27:38,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:27:38,522 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [418044142] [2021-11-07 01:27:38,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:27:38,522 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:27:38,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:27:38,524 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:27:38,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:27:39,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:27:39,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 574 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:27:39,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:27:39,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:27:39,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:27:40,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:27:40,006 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:27:40,007 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [418044142] [2021-11-07 01:27:40,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [418044142] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:27:40,007 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:27:40,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:27:40,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053685988] [2021-11-07 01:27:40,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:27:40,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:27:40,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:27:40,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:27:40,009 INFO L87 Difference]: Start difference. First operand 13349 states and 24333 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:41,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:27:41,350 INFO L93 Difference]: Finished difference Result 39254 states and 71626 transitions. [2021-11-07 01:27:41,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:27:41,351 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-11-07 01:27:41,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:27:41,421 INFO L225 Difference]: With dead ends: 39254 [2021-11-07 01:27:41,422 INFO L226 Difference]: Without dead ends: 26084 [2021-11-07 01:27:41,450 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:27:41,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26084 states. [2021-11-07 01:27:42,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26084 to 25319. [2021-11-07 01:27:43,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25319 states, 25313 states have (on average 1.8260182514913286) internal successors, (46222), 25318 states have internal predecessors, (46222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:43,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25319 states to 25319 states and 46222 transitions. [2021-11-07 01:27:43,071 INFO L78 Accepts]: Start accepts. Automaton has 25319 states and 46222 transitions. Word has length 90 [2021-11-07 01:27:43,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:27:43,072 INFO L470 AbstractCegarLoop]: Abstraction has 25319 states and 46222 transitions. [2021-11-07 01:27:43,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:43,072 INFO L276 IsEmpty]: Start isEmpty. Operand 25319 states and 46222 transitions. [2021-11-07 01:27:43,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-07 01:27:43,099 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:27:43,100 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:27:43,120 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:27:43,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:27:43,306 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:27:43,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:27:43,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1382534692, now seen corresponding path program 1 times [2021-11-07 01:27:43,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:27:43,307 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1812696324] [2021-11-07 01:27:43,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:27:43,307 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:27:43,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:27:43,308 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:27:43,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:27:44,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:27:44,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 576 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:27:44,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:27:44,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:27:44,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:27:44,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:27:44,755 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:27:44,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1812696324] [2021-11-07 01:27:44,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1812696324] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:27:44,755 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:27:44,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:27:44,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686850878] [2021-11-07 01:27:44,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:27:44,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:27:44,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:27:44,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:27:44,757 INFO L87 Difference]: Start difference. First operand 25319 states and 46222 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:46,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:27:46,885 INFO L93 Difference]: Finished difference Result 69803 states and 127029 transitions. [2021-11-07 01:27:46,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:27:46,886 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 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 91 [2021-11-07 01:27:46,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:27:46,995 INFO L225 Difference]: With dead ends: 69803 [2021-11-07 01:27:46,996 INFO L226 Difference]: Without dead ends: 44710 [2021-11-07 01:27:47,036 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:27:47,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44710 states. [2021-11-07 01:27:49,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44710 to 43945. [2021-11-07 01:27:49,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43945 states, 43939 states have (on average 1.8152211019822937) internal successors, (79759), 43944 states have internal predecessors, (79759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:49,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43945 states to 43945 states and 79759 transitions. [2021-11-07 01:27:49,751 INFO L78 Accepts]: Start accepts. Automaton has 43945 states and 79759 transitions. Word has length 91 [2021-11-07 01:27:49,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:27:49,752 INFO L470 AbstractCegarLoop]: Abstraction has 43945 states and 79759 transitions. [2021-11-07 01:27:49,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:49,752 INFO L276 IsEmpty]: Start isEmpty. Operand 43945 states and 79759 transitions. [2021-11-07 01:27:49,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-07 01:27:49,776 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:27:49,776 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:27:49,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:27:49,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:27:49,982 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:27:49,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:27:49,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1472425144, now seen corresponding path program 1 times [2021-11-07 01:27:49,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:27:49,983 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [759736631] [2021-11-07 01:27:49,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:27:49,983 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:27:49,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:27:49,984 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:27:49,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 01:27:50,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:27:50,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 584 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:27:50,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:27:51,087 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:27:51,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:27:51,389 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:27:51,389 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:27:51,389 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [759736631] [2021-11-07 01:27:51,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [759736631] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:27:51,390 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:27:51,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:27:51,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387046555] [2021-11-07 01:27:51,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:27:51,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:27:51,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:27:51,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:27:51,391 INFO L87 Difference]: Start difference. First operand 43945 states and 79759 transitions. Second operand has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:59,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:27:59,289 INFO L93 Difference]: Finished difference Result 171060 states and 310358 transitions. [2021-11-07 01:27:59,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:27:59,290 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 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 92 [2021-11-07 01:27:59,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:27:59,831 INFO L225 Difference]: With dead ends: 171060 [2021-11-07 01:27:59,831 INFO L226 Difference]: Without dead ends: 127407 [2021-11-07 01:27:59,877 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:28:00,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127407 states. [2021-11-07 01:28:03,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127407 to 43687. [2021-11-07 01:28:03,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43687 states, 43681 states have (on average 1.8023167967766305) internal successors, (78727), 43686 states have internal predecessors, (78727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:28:03,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43687 states to 43687 states and 78727 transitions. [2021-11-07 01:28:03,439 INFO L78 Accepts]: Start accepts. Automaton has 43687 states and 78727 transitions. Word has length 92 [2021-11-07 01:28:03,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:28:03,440 INFO L470 AbstractCegarLoop]: Abstraction has 43687 states and 78727 transitions. [2021-11-07 01:28:03,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:28:03,440 INFO L276 IsEmpty]: Start isEmpty. Operand 43687 states and 78727 transitions. [2021-11-07 01:28:03,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-07 01:28:03,460 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:28:03,461 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:28:03,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:28:03,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:28:03,662 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:28:03,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:28:03,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1716874602, now seen corresponding path program 1 times [2021-11-07 01:28:03,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:28:03,663 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [926189478] [2021-11-07 01:28:03,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:28:03,663 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:28:03,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:28:03,665 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:28:03,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:28:04,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:28:04,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 584 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:28:04,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:28:04,784 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:28:04,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:28:05,019 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:28:05,019 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:28:05,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [926189478] [2021-11-07 01:28:05,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [926189478] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:28:05,020 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:28:05,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:28:05,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643897098] [2021-11-07 01:28:05,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:28:05,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:28:05,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:28:05,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:28:05,022 INFO L87 Difference]: Start difference. First operand 43687 states and 78727 transitions. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:28:07,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:28:07,383 INFO L93 Difference]: Finished difference Result 87841 states and 158249 transitions. [2021-11-07 01:28:07,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:28:07,384 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-11-07 01:28:07,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:28:07,456 INFO L225 Difference]: With dead ends: 87841 [2021-11-07 01:28:07,456 INFO L226 Difference]: Without dead ends: 44452 [2021-11-07 01:28:07,479 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:28:07,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44452 states. [2021-11-07 01:28:10,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44452 to 43687. [2021-11-07 01:28:10,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43687 states, 43681 states have (on average 1.7993864609326709) internal successors, (78599), 43686 states have internal predecessors, (78599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:28:10,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43687 states to 43687 states and 78599 transitions. [2021-11-07 01:28:10,131 INFO L78 Accepts]: Start accepts. Automaton has 43687 states and 78599 transitions. Word has length 92 [2021-11-07 01:28:10,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:28:10,131 INFO L470 AbstractCegarLoop]: Abstraction has 43687 states and 78599 transitions. [2021-11-07 01:28:10,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:28:10,131 INFO L276 IsEmpty]: Start isEmpty. Operand 43687 states and 78599 transitions. [2021-11-07 01:28:10,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-07 01:28:10,146 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:28:10,146 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:28:10,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:28:10,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:28:10,347 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:28:10,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:28:10,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1263709981, now seen corresponding path program 1 times [2021-11-07 01:28:10,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:28:10,348 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [939889300] [2021-11-07 01:28:10,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:28:10,348 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:28:10,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:28:10,349 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:28:10,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5d9d50c-21e3-4f24-b0f7-a4d2ef184280/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 01:28:11,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:28:11,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 578 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:28:11,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:28:11,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:28:11,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:28:11,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:28:11,839 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:28:11,839 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [939889300] [2021-11-07 01:28:11,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [939889300] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:28:11,839 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:28:11,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:28:11,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354428735] [2021-11-07 01:28:11,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:28:11,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:28:11,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:28:11,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:28:11,841 INFO L87 Difference]: Start difference. First operand 43687 states and 78599 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)