./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec3_product24.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_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/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_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec3_product24.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/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_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/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 d6572e4842c262533bee65d100c3a8328a4505c101a30c259390a3fe459f824d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:09:51,759 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:09:51,761 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:09:51,794 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:09:51,794 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:09:51,796 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:09:51,798 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:09:51,800 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:09:51,803 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:09:51,804 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:09:51,806 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:09:51,807 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:09:51,808 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:09:51,809 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:09:51,811 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:09:51,813 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:09:51,814 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:09:51,816 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:09:51,818 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:09:51,821 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:09:51,824 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:09:51,826 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:09:51,828 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:09:51,829 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:09:51,834 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:09:51,834 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:09:51,835 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:09:51,836 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:09:51,837 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:09:51,838 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:09:51,839 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:09:51,840 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:09:51,841 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:09:51,843 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:09:51,844 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:09:51,845 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:09:51,846 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:09:51,846 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:09:51,847 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:09:51,848 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:09:51,849 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:09:51,851 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:09:51,879 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:09:51,880 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:09:51,881 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:09:51,881 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:09:51,882 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:09:51,882 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:09:51,883 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:09:51,883 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:09:51,883 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:09:51,883 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:09:51,884 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:09:51,884 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:09:51,884 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:09:51,884 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:09:51,885 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:09:51,885 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:09:51,886 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:09:51,886 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:09:51,886 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:09:51,886 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:09:51,887 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:09:51,887 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:09:51,887 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:09:51,887 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:09:51,888 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:09:51,888 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:09:51,888 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:09:51,888 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:09:51,889 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:09:51,889 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:09:51,889 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:09:51,889 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:09:51,890 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:09:51,890 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:09:51,890 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:09:51,890 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:09:51,891 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:09:51,891 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:09:51,891 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:09:51,891 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_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d6572e4842c262533bee65d100c3a8328a4505c101a30c259390a3fe459f824d [2021-11-07 01:09:52,137 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:09:52,159 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:09:52,163 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:09:52,164 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:09:52,165 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:09:52,166 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec3_product24.cil.c [2021-11-07 01:09:52,239 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/data/c5942e1d7/54e98412fcad42ea8a625e1e7817e11c/FLAG6d2ab978c [2021-11-07 01:09:52,897 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:09:52,897 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/sv-benchmarks/c/product-lines/email_spec3_product24.cil.c [2021-11-07 01:09:52,921 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/data/c5942e1d7/54e98412fcad42ea8a625e1e7817e11c/FLAG6d2ab978c [2021-11-07 01:09:53,114 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/data/c5942e1d7/54e98412fcad42ea8a625e1e7817e11c [2021-11-07 01:09:53,117 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:09:53,118 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:09:53,134 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:09:53,134 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:09:53,137 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:09:53,138 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:09:53" (1/1) ... [2021-11-07 01:09:53,141 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1cbb2fa2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:09:53, skipping insertion in model container [2021-11-07 01:09:53,142 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:09:53" (1/1) ... [2021-11-07 01:09:53,150 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:09:53,216 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:09:53,755 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_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/sv-benchmarks/c/product-lines/email_spec3_product24.cil.c[52737,52750] [2021-11-07 01:09:53,808 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:09:53,820 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 01:09:53,821 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1399d390 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:09:53, skipping insertion in model container [2021-11-07 01:09:53,821 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:09:53,822 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:09:53,824 INFO L168 Benchmark]: Toolchain (without parser) took 704.51 ms. Allocated memory was 109.1 MB in the beginning and 153.1 MB in the end (delta: 44.0 MB). Free memory was 76.9 MB in the beginning and 115.6 MB in the end (delta: -38.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-07 01:09:53,825 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 109.1 MB. Free memory is still 62.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:09:53,826 INFO L168 Benchmark]: CACSL2BoogieTranslator took 688.15 ms. Allocated memory was 109.1 MB in the beginning and 153.1 MB in the end (delta: 44.0 MB). Free memory was 76.6 MB in the beginning and 115.6 MB in the end (delta: -39.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-07 01:09:53,828 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 109.1 MB. Free memory is still 62.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 688.15 ms. Allocated memory was 109.1 MB in the beginning and 153.1 MB in the end (delta: 44.0 MB). Free memory was 76.6 MB in the beginning and 115.6 MB in the end (delta: -39.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 2574]: 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_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/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_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec3_product24.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/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_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/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 d6572e4842c262533bee65d100c3a8328a4505c101a30c259390a3fe459f824d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:09:56,181 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:09:56,185 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:09:56,247 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:09:56,248 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:09:56,254 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:09:56,257 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:09:56,262 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:09:56,266 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:09:56,277 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:09:56,279 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:09:56,281 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:09:56,282 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:09:56,285 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:09:56,288 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:09:56,291 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:09:56,292 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:09:56,294 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:09:56,299 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:09:56,306 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:09:56,308 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:09:56,312 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:09:56,315 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:09:56,317 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:09:56,323 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:09:56,324 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:09:56,324 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:09:56,326 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:09:56,327 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:09:56,328 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:09:56,329 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:09:56,330 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:09:56,332 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:09:56,333 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:09:56,335 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:09:56,336 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:09:56,337 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:09:56,337 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:09:56,337 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:09:56,340 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:09:56,340 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:09:56,341 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:09:56,389 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:09:56,390 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:09:56,391 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:09:56,391 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:09:56,392 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:09:56,392 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:09:56,392 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:09:56,392 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:09:56,393 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:09:56,394 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:09:56,395 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:09:56,396 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:09:56,396 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:09:56,396 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:09:56,396 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:09:56,397 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:09:56,397 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:09:56,397 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:09:56,397 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:09:56,397 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:09:56,398 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:09:56,398 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:09:56,398 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:09:56,398 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:09:56,399 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:09:56,399 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:09:56,399 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:09:56,399 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:09:56,400 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:09:56,400 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:09:56,400 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:09:56,400 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:09:56,401 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:09:56,401 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:09:56,401 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:09:56,401 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_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d6572e4842c262533bee65d100c3a8328a4505c101a30c259390a3fe459f824d [2021-11-07 01:09:56,832 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:09:56,875 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:09:56,878 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:09:56,879 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:09:56,880 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:09:56,881 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec3_product24.cil.c [2021-11-07 01:09:56,971 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/data/719ef0bd6/4a25915700c54ff098e3aefc7a9cc42b/FLAG16587ed70 [2021-11-07 01:09:57,724 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:09:57,725 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/sv-benchmarks/c/product-lines/email_spec3_product24.cil.c [2021-11-07 01:09:57,746 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/data/719ef0bd6/4a25915700c54ff098e3aefc7a9cc42b/FLAG16587ed70 [2021-11-07 01:09:57,904 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/data/719ef0bd6/4a25915700c54ff098e3aefc7a9cc42b [2021-11-07 01:09:57,906 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:09:57,908 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:09:57,930 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:09:57,930 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:09:57,934 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:09:57,935 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:09:57" (1/1) ... [2021-11-07 01:09:57,936 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14f19b30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:09:57, skipping insertion in model container [2021-11-07 01:09:57,936 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:09:57" (1/1) ... [2021-11-07 01:09:57,943 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:09:58,017 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:09:58,560 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_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/sv-benchmarks/c/product-lines/email_spec3_product24.cil.c[52737,52750] [2021-11-07 01:09:58,640 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:09:58,669 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:09:58,704 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:09:58,845 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_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/sv-benchmarks/c/product-lines/email_spec3_product24.cil.c[52737,52750] [2021-11-07 01:09:58,877 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:09:58,888 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:09:58,982 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_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/sv-benchmarks/c/product-lines/email_spec3_product24.cil.c[52737,52750] [2021-11-07 01:09:59,004 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:09:59,060 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:09:59,060 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:09:59 WrapperNode [2021-11-07 01:09:59,060 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:09:59,062 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:09:59,063 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:09:59,063 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:09:59,070 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:09:59" (1/1) ... [2021-11-07 01:09:59,132 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:09:59" (1/1) ... [2021-11-07 01:09:59,236 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:09:59,237 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:09:59,237 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:09:59,237 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:09:59,246 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:09:59" (1/1) ... [2021-11-07 01:09:59,246 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:09:59" (1/1) ... [2021-11-07 01:09:59,255 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:09:59" (1/1) ... [2021-11-07 01:09:59,256 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:09:59" (1/1) ... [2021-11-07 01:09:59,298 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:09:59" (1/1) ... [2021-11-07 01:09:59,323 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:09:59" (1/1) ... [2021-11-07 01:09:59,330 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:09:59" (1/1) ... [2021-11-07 01:09:59,345 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:09:59,346 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:09:59,346 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:09:59,346 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:09:59,354 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:09:59" (1/1) ... [2021-11-07 01:09:59,360 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:09:59,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:09:59,384 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:09:59,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:09:59,428 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 01:09:59,428 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:09:59,428 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:09:59,429 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:09:59,429 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:10:04,053 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:10:04,054 INFO L299 CfgBuilder]: Removed 347 assume(true) statements. [2021-11-07 01:10:04,057 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:10:04 BoogieIcfgContainer [2021-11-07 01:10:04,057 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:10:04,059 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:10:04,059 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:10:04,062 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:10:04,063 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:09:57" (1/3) ... [2021-11-07 01:10:04,064 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@407e9eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:10:04, skipping insertion in model container [2021-11-07 01:10:04,064 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:09:59" (2/3) ... [2021-11-07 01:10:04,064 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@407e9eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:10:04, skipping insertion in model container [2021-11-07 01:10:04,064 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:10:04" (3/3) ... [2021-11-07 01:10:04,066 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec3_product24.cil.c [2021-11-07 01:10:04,071 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:10:04,072 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2021-11-07 01:10:04,121 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:10:04,127 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 01:10:04,127 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-11-07 01:10:04,154 INFO L276 IsEmpty]: Start isEmpty. Operand has 515 states, 510 states have (on average 1.7431372549019608) internal successors, (889), 514 states have internal predecessors, (889), 0 states have call successors, (0), 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 01:10:04,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-07 01:10:04,167 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:04,167 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:10:04,168 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 01:10:04,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:04,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1367439199, now seen corresponding path program 1 times [2021-11-07 01:10:04,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:10:04,189 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1389098154] [2021-11-07 01:10:04,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:04,190 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:10:04,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:10:04,193 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:10:04,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:10:04,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:04,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:10:04,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:10:04,813 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 01:10:04,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:10:04,938 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 01:10:04,939 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:10:04,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1389098154] [2021-11-07 01:10:04,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1389098154] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:04,940 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:10:04,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:10:04,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335582718] [2021-11-07 01:10:04,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:10:04,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:10:04,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:10:04,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:10:04,971 INFO L87 Difference]: Start difference. First operand has 515 states, 510 states have (on average 1.7431372549019608) internal successors, (889), 514 states have internal predecessors, (889), 0 states have call successors, (0), 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 23.0) internal successors, (46), 2 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:05,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:10:05,044 INFO L93 Difference]: Finished difference Result 784 states and 1330 transitions. [2021-11-07 01:10:05,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:10:05,046 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 23.0) internal successors, (46), 2 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-07 01:10:05,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:10:05,063 INFO L225 Difference]: With dead ends: 784 [2021-11-07 01:10:05,064 INFO L226 Difference]: Without dead ends: 436 [2021-11-07 01:10:05,068 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 90 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 01:10:05,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-11-07 01:10:05,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 436. [2021-11-07 01:10:05,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 432 states have (on average 1.7407407407407407) internal successors, (752), 435 states have internal predecessors, (752), 0 states have call successors, (0), 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 01:10:05,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 752 transitions. [2021-11-07 01:10:05,142 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 752 transitions. Word has length 46 [2021-11-07 01:10:05,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:10:05,143 INFO L470 AbstractCegarLoop]: Abstraction has 436 states and 752 transitions. [2021-11-07 01:10:05,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 23.0) internal successors, (46), 2 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:05,144 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 752 transitions. [2021-11-07 01:10:05,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-07 01:10:05,148 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:05,148 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:10:05,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:10:05,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:10:05,363 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 01:10:05,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:05,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1539069748, now seen corresponding path program 1 times [2021-11-07 01:10:05,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:10:05,365 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1573254559] [2021-11-07 01:10:05,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:05,365 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:10:05,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:10:05,367 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:10:05,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:10:05,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:05,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:10:05,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:10:05,959 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 01:10:05,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:10:06,142 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 01:10:06,142 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:10:06,143 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1573254559] [2021-11-07 01:10:06,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1573254559] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:06,143 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:10:06,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:10:06,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100589607] [2021-11-07 01:10:06,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:10:06,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:10:06,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:10:06,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:10:06,147 INFO L87 Difference]: Start difference. First operand 436 states and 752 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 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 01:10:06,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:10:06,257 INFO L93 Difference]: Finished difference Result 1278 states and 2208 transitions. [2021-11-07 01:10:06,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:10:06,258 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-07 01:10:06,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:10:06,267 INFO L225 Difference]: With dead ends: 1278 [2021-11-07 01:10:06,267 INFO L226 Difference]: Without dead ends: 857 [2021-11-07 01:10:06,273 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 90 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 01:10:06,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 857 states. [2021-11-07 01:10:06,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 857 to 435. [2021-11-07 01:10:06,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 431 states have (on average 1.7331786542923433) internal successors, (747), 434 states have internal predecessors, (747), 0 states have call successors, (0), 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 01:10:06,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 747 transitions. [2021-11-07 01:10:06,338 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 747 transitions. Word has length 47 [2021-11-07 01:10:06,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:10:06,339 INFO L470 AbstractCegarLoop]: Abstraction has 435 states and 747 transitions. [2021-11-07 01:10:06,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 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 01:10:06,340 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 747 transitions. [2021-11-07 01:10:06,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-07 01:10:06,354 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:06,354 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:10:06,369 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:10:06,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:10:06,563 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 01:10:06,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:06,564 INFO L85 PathProgramCache]: Analyzing trace with hash -2033455694, now seen corresponding path program 1 times [2021-11-07 01:10:06,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:10:06,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1903872767] [2021-11-07 01:10:06,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:06,565 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:10:06,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:10:06,566 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:10:06,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:10:06,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:06,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:10:06,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:10:07,119 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 01:10:07,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:10:07,277 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 01:10:07,277 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:10:07,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1903872767] [2021-11-07 01:10:07,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1903872767] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:07,278 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:10:07,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:10:07,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081604204] [2021-11-07 01:10:07,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:10:07,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:10:07,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:10:07,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:10:07,280 INFO L87 Difference]: Start difference. First operand 435 states and 747 transitions. Second operand has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:07,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:10:07,525 INFO L93 Difference]: Finished difference Result 1657 states and 2850 transitions. [2021-11-07 01:10:07,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:10:07,526 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-11-07 01:10:07,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:10:07,535 INFO L225 Difference]: With dead ends: 1657 [2021-11-07 01:10:07,536 INFO L226 Difference]: Without dead ends: 1240 [2021-11-07 01:10:07,537 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 92 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 01:10:07,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1240 states. [2021-11-07 01:10:07,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1240 to 434. [2021-11-07 01:10:07,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 430 states have (on average 1.7279069767441861) internal successors, (743), 433 states have internal predecessors, (743), 0 states have call successors, (0), 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 01:10:07,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 743 transitions. [2021-11-07 01:10:07,575 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 743 transitions. Word has length 49 [2021-11-07 01:10:07,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:10:07,575 INFO L470 AbstractCegarLoop]: Abstraction has 434 states and 743 transitions. [2021-11-07 01:10:07,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:07,576 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 743 transitions. [2021-11-07 01:10:07,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-07 01:10:07,577 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:07,577 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] [2021-11-07 01:10:07,600 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-07 01:10:07,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:10:07,804 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 01:10:07,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:07,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1906665989, now seen corresponding path program 1 times [2021-11-07 01:10:07,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:10:07,806 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [262610052] [2021-11-07 01:10:07,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:07,807 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:10:07,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:10:07,809 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:10:07,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:10:08,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:08,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:10:08,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:10:08,407 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 01:10:08,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:10:08,548 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 01:10:08,549 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:10:08,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [262610052] [2021-11-07 01:10:08,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [262610052] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:08,550 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:10:08,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:10:08,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954166536] [2021-11-07 01:10:08,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:10:08,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:10:08,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:10:08,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:10:08,554 INFO L87 Difference]: Start difference. First operand 434 states and 743 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 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 01:10:08,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:10:08,631 INFO L93 Difference]: Finished difference Result 865 states and 1483 transitions. [2021-11-07 01:10:08,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:10:08,631 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 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 50 [2021-11-07 01:10:08,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:10:08,635 INFO L225 Difference]: With dead ends: 865 [2021-11-07 01:10:08,635 INFO L226 Difference]: Without dead ends: 439 [2021-11-07 01:10:08,636 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 96 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 01:10:08,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-11-07 01:10:08,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 434. [2021-11-07 01:10:08,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 430 states have (on average 1.7209302325581395) internal successors, (740), 433 states have internal predecessors, (740), 0 states have call successors, (0), 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 01:10:08,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 740 transitions. [2021-11-07 01:10:08,664 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 740 transitions. Word has length 50 [2021-11-07 01:10:08,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:10:08,665 INFO L470 AbstractCegarLoop]: Abstraction has 434 states and 740 transitions. [2021-11-07 01:10:08,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 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 01:10:08,665 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 740 transitions. [2021-11-07 01:10:08,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-07 01:10:08,667 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:08,667 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:10:08,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:10:08,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:10:08,882 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 01:10:08,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:08,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1889731226, now seen corresponding path program 1 times [2021-11-07 01:10:08,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:10:08,884 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1248153984] [2021-11-07 01:10:08,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:08,884 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:10:08,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:10:08,885 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:10:08,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:10:09,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:09,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:10:09,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:10:09,482 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 01:10:09,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:10:09,624 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 01:10:09,624 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:10:09,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1248153984] [2021-11-07 01:10:09,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1248153984] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:09,625 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:10:09,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:10:09,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409666304] [2021-11-07 01:10:09,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:10:09,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:10:09,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:10:09,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:10:09,627 INFO L87 Difference]: Start difference. First operand 434 states and 740 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 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 01:10:09,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:10:09,948 INFO L93 Difference]: Finished difference Result 1644 states and 2826 transitions. [2021-11-07 01:10:09,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:10:09,949 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-07 01:10:09,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:10:09,957 INFO L225 Difference]: With dead ends: 1644 [2021-11-07 01:10:09,957 INFO L226 Difference]: Without dead ends: 1236 [2021-11-07 01:10:09,958 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 96 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 01:10:09,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1236 states. [2021-11-07 01:10:09,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1236 to 434. [2021-11-07 01:10:09,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 430 states have (on average 1.713953488372093) internal successors, (737), 433 states have internal predecessors, (737), 0 states have call successors, (0), 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 01:10:10,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 737 transitions. [2021-11-07 01:10:10,001 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 737 transitions. Word has length 51 [2021-11-07 01:10:10,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:10:10,002 INFO L470 AbstractCegarLoop]: Abstraction has 434 states and 737 transitions. [2021-11-07 01:10:10,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 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 01:10:10,002 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 737 transitions. [2021-11-07 01:10:10,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-07 01:10:10,004 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:10,004 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] [2021-11-07 01:10:10,025 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:10:10,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:10:10,220 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 01:10:10,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:10,220 INFO L85 PathProgramCache]: Analyzing trace with hash 384046677, now seen corresponding path program 1 times [2021-11-07 01:10:10,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:10:10,221 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [302447431] [2021-11-07 01:10:10,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:10,221 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:10:10,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:10:10,222 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:10:10,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:10:10,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:10,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:10:10,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:10:10,840 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 01:10:10,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:10:10,971 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 01:10:10,971 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:10:10,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [302447431] [2021-11-07 01:10:10,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [302447431] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:10,972 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:10:10,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:10:10,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827349551] [2021-11-07 01:10:10,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:10:10,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:10:10,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:10:10,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:10:10,974 INFO L87 Difference]: Start difference. First operand 434 states and 737 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 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 01:10:11,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:10:11,086 INFO L93 Difference]: Finished difference Result 1032 states and 1751 transitions. [2021-11-07 01:10:11,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:10:11,087 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 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 53 [2021-11-07 01:10:11,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:10:11,092 INFO L225 Difference]: With dead ends: 1032 [2021-11-07 01:10:11,093 INFO L226 Difference]: Without dead ends: 842 [2021-11-07 01:10:11,094 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 102 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 01:10:11,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2021-11-07 01:10:11,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 652. [2021-11-07 01:10:11,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 652 states, 648 states have (on average 1.751543209876543) internal successors, (1135), 651 states have internal predecessors, (1135), 0 states have call successors, (0), 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 01:10:11,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 1135 transitions. [2021-11-07 01:10:11,154 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 1135 transitions. Word has length 53 [2021-11-07 01:10:11,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:10:11,154 INFO L470 AbstractCegarLoop]: Abstraction has 652 states and 1135 transitions. [2021-11-07 01:10:11,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 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 01:10:11,154 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 1135 transitions. [2021-11-07 01:10:11,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 01:10:11,156 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:11,156 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 01:10:11,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:10:11,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:10:11,375 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 01:10:11,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:11,375 INFO L85 PathProgramCache]: Analyzing trace with hash 413258502, now seen corresponding path program 1 times [2021-11-07 01:10:11,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:10:11,376 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [910760267] [2021-11-07 01:10:11,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:11,376 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:10:11,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:10:11,378 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:10:11,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:10:11,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:11,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:10:11,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:10:12,040 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 01:10:12,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:10:12,205 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 01:10:12,205 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:10:12,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [910760267] [2021-11-07 01:10:12,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [910760267] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:12,205 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:10:12,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:10:12,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245999685] [2021-11-07 01:10:12,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:10:12,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:10:12,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:10:12,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:10:12,207 INFO L87 Difference]: Start difference. First operand 652 states and 1135 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:12,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:10:12,303 INFO L93 Difference]: Finished difference Result 1576 states and 2746 transitions. [2021-11-07 01:10:12,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:10:12,304 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-07 01:10:12,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:10:12,310 INFO L225 Difference]: With dead ends: 1576 [2021-11-07 01:10:12,311 INFO L226 Difference]: Without dead ends: 1008 [2021-11-07 01:10:12,313 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:10:12,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1008 states. [2021-11-07 01:10:12,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1008 to 818. [2021-11-07 01:10:12,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 818 states, 814 states have (on average 1.7641277641277642) internal successors, (1436), 817 states have internal predecessors, (1436), 0 states have call successors, (0), 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 01:10:12,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 1436 transitions. [2021-11-07 01:10:12,389 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 1436 transitions. Word has length 65 [2021-11-07 01:10:12,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:10:12,392 INFO L470 AbstractCegarLoop]: Abstraction has 818 states and 1436 transitions. [2021-11-07 01:10:12,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:12,392 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 1436 transitions. [2021-11-07 01:10:12,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 01:10:12,394 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:12,394 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 01:10:12,412 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-07 01:10:12,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:10:12,610 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 01:10:12,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:12,610 INFO L85 PathProgramCache]: Analyzing trace with hash 9335589, now seen corresponding path program 1 times [2021-11-07 01:10:12,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:10:12,611 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1766987868] [2021-11-07 01:10:12,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:12,611 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:10:12,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:10:12,612 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:10:12,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:10:13,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:13,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:10:13,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:10:13,279 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 01:10:13,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:10:13,435 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 01:10:13,435 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:10:13,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1766987868] [2021-11-07 01:10:13,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1766987868] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:13,436 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:10:13,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:10:13,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889312578] [2021-11-07 01:10:13,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:10:13,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:10:13,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:10:13,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:10:13,438 INFO L87 Difference]: Start difference. First operand 818 states and 1436 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:13,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:10:13,553 INFO L93 Difference]: Finished difference Result 2106 states and 3714 transitions. [2021-11-07 01:10:13,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:10:13,554 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-07 01:10:13,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:10:13,563 INFO L225 Difference]: With dead ends: 2106 [2021-11-07 01:10:13,563 INFO L226 Difference]: Without dead ends: 1380 [2021-11-07 01:10:13,565 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:10:13,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1380 states. [2021-11-07 01:10:13,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1380 to 1190. [2021-11-07 01:10:13,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1190 states, 1186 states have (on average 1.7824620573355818) internal successors, (2114), 1189 states have internal predecessors, (2114), 0 states have call successors, (0), 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 01:10:13,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1190 states to 1190 states and 2114 transitions. [2021-11-07 01:10:13,687 INFO L78 Accepts]: Start accepts. Automaton has 1190 states and 2114 transitions. Word has length 66 [2021-11-07 01:10:13,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:10:13,688 INFO L470 AbstractCegarLoop]: Abstraction has 1190 states and 2114 transitions. [2021-11-07 01:10:13,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:13,688 INFO L276 IsEmpty]: Start isEmpty. Operand 1190 states and 2114 transitions. [2021-11-07 01:10:13,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 01:10:13,691 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:13,691 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:10:13,710 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:10:13,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:10:13,906 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 01:10:13,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:13,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1030761396, now seen corresponding path program 1 times [2021-11-07 01:10:13,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:10:13,908 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [335052298] [2021-11-07 01:10:13,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:13,908 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:10:13,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:10:13,909 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:10:13,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:10:14,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:14,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:10:14,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:10:14,583 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 01:10:14,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:10:14,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:10:14,749 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:10:14,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [335052298] [2021-11-07 01:10:14,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [335052298] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:14,750 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:10:14,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:10:14,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306381196] [2021-11-07 01:10:14,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:10:14,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:10:14,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:10:14,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:10:14,751 INFO L87 Difference]: Start difference. First operand 1190 states and 2114 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:14,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:10:14,935 INFO L93 Difference]: Finished difference Result 3202 states and 5717 transitions. [2021-11-07 01:10:14,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:10:14,936 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-07 01:10:14,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:10:14,950 INFO L225 Difference]: With dead ends: 3202 [2021-11-07 01:10:14,950 INFO L226 Difference]: Without dead ends: 2112 [2021-11-07 01:10:14,954 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:10:14,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2112 states. [2021-11-07 01:10:15,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2112 to 1922. [2021-11-07 01:10:15,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1922 states, 1918 states have (on average 1.7982273201251304) internal successors, (3449), 1921 states have internal predecessors, (3449), 0 states have call successors, (0), 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 01:10:15,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1922 states to 1922 states and 3449 transitions. [2021-11-07 01:10:15,105 INFO L78 Accepts]: Start accepts. Automaton has 1922 states and 3449 transitions. Word has length 67 [2021-11-07 01:10:15,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:10:15,105 INFO L470 AbstractCegarLoop]: Abstraction has 1922 states and 3449 transitions. [2021-11-07 01:10:15,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:15,106 INFO L276 IsEmpty]: Start isEmpty. Operand 1922 states and 3449 transitions. [2021-11-07 01:10:15,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 01:10:15,109 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:15,109 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 01:10:15,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:10:15,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:10:15,325 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 01:10:15,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:15,326 INFO L85 PathProgramCache]: Analyzing trace with hash 223684916, now seen corresponding path program 1 times [2021-11-07 01:10:15,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:10:15,326 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1311462064] [2021-11-07 01:10:15,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:15,327 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:10:15,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:10:15,330 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:10:15,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:10:15,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:15,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:10:15,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:10:16,036 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 01:10:16,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:10:16,207 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 01:10:16,207 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:10:16,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1311462064] [2021-11-07 01:10:16,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1311462064] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:16,207 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:10:16,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:10:16,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811107931] [2021-11-07 01:10:16,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:10:16,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:10:16,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:10:16,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:10:16,209 INFO L87 Difference]: Start difference. First operand 1922 states and 3449 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:16,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:10:16,460 INFO L93 Difference]: Finished difference Result 5134 states and 9241 transitions. [2021-11-07 01:10:16,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:10:16,460 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-07 01:10:16,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:10:16,483 INFO L225 Difference]: With dead ends: 5134 [2021-11-07 01:10:16,483 INFO L226 Difference]: Without dead ends: 3346 [2021-11-07 01:10:16,487 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:10:16,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3346 states. [2021-11-07 01:10:16,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3346 to 3156. [2021-11-07 01:10:16,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3156 states, 3152 states have (on average 1.8064720812182742) internal successors, (5694), 3155 states have internal predecessors, (5694), 0 states have call successors, (0), 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 01:10:16,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3156 states to 3156 states and 5694 transitions. [2021-11-07 01:10:16,745 INFO L78 Accepts]: Start accepts. Automaton has 3156 states and 5694 transitions. Word has length 68 [2021-11-07 01:10:16,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:10:16,745 INFO L470 AbstractCegarLoop]: Abstraction has 3156 states and 5694 transitions. [2021-11-07 01:10:16,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:16,746 INFO L276 IsEmpty]: Start isEmpty. Operand 3156 states and 5694 transitions. [2021-11-07 01:10:16,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 01:10:16,750 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:16,750 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 01:10:16,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:10:16,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:10:16,966 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 01:10:16,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:16,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1173583269, now seen corresponding path program 1 times [2021-11-07 01:10:16,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:10:16,967 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2073104938] [2021-11-07 01:10:16,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:16,967 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:10:16,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:10:16,969 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:10:17,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:10:17,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:17,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:10:17,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:10:17,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:10:17,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:10:17,865 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 01:10:17,865 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:10:17,865 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2073104938] [2021-11-07 01:10:17,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2073104938] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:17,865 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:10:17,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:10:17,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266204477] [2021-11-07 01:10:17,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:10:17,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:10:17,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:10:17,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:10:17,867 INFO L87 Difference]: Start difference. First operand 3156 states and 5694 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 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 01:10:18,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:10:18,222 INFO L93 Difference]: Finished difference Result 8552 states and 15459 transitions. [2021-11-07 01:10:18,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:10:18,223 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 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 01:10:18,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:10:18,285 INFO L225 Difference]: With dead ends: 8552 [2021-11-07 01:10:18,285 INFO L226 Difference]: Without dead ends: 5564 [2021-11-07 01:10:18,290 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 135 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 01:10:18,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5564 states. [2021-11-07 01:10:18,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5564 to 5374. [2021-11-07 01:10:18,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5374 states, 5370 states have (on average 1.8098696461824952) internal successors, (9719), 5373 states have internal predecessors, (9719), 0 states have call successors, (0), 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 01:10:18,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5374 states to 5374 states and 9719 transitions. [2021-11-07 01:10:18,711 INFO L78 Accepts]: Start accepts. Automaton has 5374 states and 9719 transitions. Word has length 69 [2021-11-07 01:10:18,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:10:18,712 INFO L470 AbstractCegarLoop]: Abstraction has 5374 states and 9719 transitions. [2021-11-07 01:10:18,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 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 01:10:18,713 INFO L276 IsEmpty]: Start isEmpty. Operand 5374 states and 9719 transitions. [2021-11-07 01:10:18,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 01:10:18,717 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:18,718 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 01:10:18,732 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:10:18,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:10:18,933 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 01:10:18,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:18,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1284154875, now seen corresponding path program 1 times [2021-11-07 01:10:18,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:10:18,934 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1208188036] [2021-11-07 01:10:18,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:18,934 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:10:18,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:10:18,935 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:10:18,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:10:19,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:19,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:10:19,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:10:19,643 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 01:10:19,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:10:19,809 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 01:10:19,809 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:10:19,809 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1208188036] [2021-11-07 01:10:19,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1208188036] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:19,809 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:10:19,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:10:19,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600518862] [2021-11-07 01:10:19,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:10:19,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:10:19,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:10:19,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:10:19,811 INFO L87 Difference]: Start difference. First operand 5374 states and 9719 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:20,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:10:20,426 INFO L93 Difference]: Finished difference Result 15532 states and 28145 transitions. [2021-11-07 01:10:20,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:10:20,427 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-07 01:10:20,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:10:20,489 INFO L225 Difference]: With dead ends: 15532 [2021-11-07 01:10:20,490 INFO L226 Difference]: Without dead ends: 10334 [2021-11-07 01:10:20,502 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 137 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 01:10:20,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10334 states. [2021-11-07 01:10:21,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10334 to 10144. [2021-11-07 01:10:21,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10144 states, 10140 states have (on average 1.8122287968441815) internal successors, (18376), 10143 states have internal predecessors, (18376), 0 states have call successors, (0), 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 01:10:21,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10144 states to 10144 states and 18376 transitions. [2021-11-07 01:10:21,393 INFO L78 Accepts]: Start accepts. Automaton has 10144 states and 18376 transitions. Word has length 70 [2021-11-07 01:10:21,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:10:21,393 INFO L470 AbstractCegarLoop]: Abstraction has 10144 states and 18376 transitions. [2021-11-07 01:10:21,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:21,394 INFO L276 IsEmpty]: Start isEmpty. Operand 10144 states and 18376 transitions. [2021-11-07 01:10:21,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 01:10:21,402 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:21,402 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] [2021-11-07 01:10:21,418 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-11-07 01:10:21,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:10:21,619 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 01:10:21,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:21,619 INFO L85 PathProgramCache]: Analyzing trace with hash -68905739, now seen corresponding path program 1 times [2021-11-07 01:10:21,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:10:21,620 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1210851185] [2021-11-07 01:10:21,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:21,620 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:10:21,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:10:21,621 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:10:21,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:10:22,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:22,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:10:22,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:10:22,398 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 01:10:22,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:10:22,608 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 01:10:22,609 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:10:22,609 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1210851185] [2021-11-07 01:10:22,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1210851185] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:22,609 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:10:22,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:10:22,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402509689] [2021-11-07 01:10:22,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:10:22,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:10:22,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:10:22,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:10:22,611 INFO L87 Difference]: Start difference. First operand 10144 states and 18376 transitions. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 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 01:10:25,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:10:25,610 INFO L93 Difference]: Finished difference Result 24991 states and 45281 transitions. [2021-11-07 01:10:25,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:10:25,610 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-07 01:10:25,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:10:25,655 INFO L225 Difference]: With dead ends: 24991 [2021-11-07 01:10:25,655 INFO L226 Difference]: Without dead ends: 15101 [2021-11-07 01:10:25,670 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 136 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 01:10:25,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15101 states. [2021-11-07 01:10:26,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15101 to 10111. [2021-11-07 01:10:26,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10111 states, 10107 states have (on average 1.8050855842485407) internal successors, (18244), 10110 states have internal predecessors, (18244), 0 states have call successors, (0), 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 01:10:26,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10111 states to 10111 states and 18244 transitions. [2021-11-07 01:10:26,580 INFO L78 Accepts]: Start accepts. Automaton has 10111 states and 18244 transitions. Word has length 71 [2021-11-07 01:10:26,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:10:26,581 INFO L470 AbstractCegarLoop]: Abstraction has 10111 states and 18244 transitions. [2021-11-07 01:10:26,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 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 01:10:26,581 INFO L276 IsEmpty]: Start isEmpty. Operand 10111 states and 18244 transitions. [2021-11-07 01:10:26,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 01:10:26,588 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:26,588 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:10:26,605 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:10:26,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:10:26,805 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 01:10:26,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:26,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1609448236, now seen corresponding path program 1 times [2021-11-07 01:10:26,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:10:26,806 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [395980466] [2021-11-07 01:10:26,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:26,806 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:10:26,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:10:26,808 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:10:26,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:10:27,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:27,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:10:27,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:10:27,670 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 01:10:27,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:10:27,866 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 01:10:27,866 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:10:27,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [395980466] [2021-11-07 01:10:27,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [395980466] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:27,867 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:10:27,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:10:27,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905976647] [2021-11-07 01:10:27,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:10:27,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:10:27,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:10:27,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:10:27,869 INFO L87 Difference]: Start difference. First operand 10111 states and 18244 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:29,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:10:29,002 INFO L93 Difference]: Finished difference Result 29575 states and 53427 transitions. [2021-11-07 01:10:29,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:10:29,003 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-07 01:10:29,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:10:29,062 INFO L225 Difference]: With dead ends: 29575 [2021-11-07 01:10:29,062 INFO L226 Difference]: Without dead ends: 19647 [2021-11-07 01:10:29,075 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 139 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 01:10:29,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19647 states. [2021-11-07 01:10:30,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19647 to 19457. [2021-11-07 01:10:30,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19457 states, 19453 states have (on average 1.8048115971829537) internal successors, (35109), 19456 states have internal predecessors, (35109), 0 states have call successors, (0), 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 01:10:30,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19457 states to 19457 states and 35109 transitions. [2021-11-07 01:10:30,252 INFO L78 Accepts]: Start accepts. Automaton has 19457 states and 35109 transitions. Word has length 71 [2021-11-07 01:10:30,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:10:30,253 INFO L470 AbstractCegarLoop]: Abstraction has 19457 states and 35109 transitions. [2021-11-07 01:10:30,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:30,253 INFO L276 IsEmpty]: Start isEmpty. Operand 19457 states and 35109 transitions. [2021-11-07 01:10:30,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 01:10:30,264 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:30,264 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 01:10:30,290 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:10:30,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:10:30,480 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 01:10:30,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:30,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1850620012, now seen corresponding path program 1 times [2021-11-07 01:10:30,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:10:30,481 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [533242308] [2021-11-07 01:10:30,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:30,481 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:10:30,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:10:30,482 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:10:30,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:10:31,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:31,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:10:31,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:10:31,316 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 01:10:31,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:10:31,482 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 01:10:31,483 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:10:31,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [533242308] [2021-11-07 01:10:31,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [533242308] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:31,483 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:10:31,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:10:31,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423511098] [2021-11-07 01:10:31,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:10:31,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:10:31,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:10:31,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:10:31,485 INFO L87 Difference]: Start difference. First operand 19457 states and 35109 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:32,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:10:32,942 INFO L93 Difference]: Finished difference Result 57799 states and 104336 transitions. [2021-11-07 01:10:32,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:10:32,943 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-07 01:10:32,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:10:33,032 INFO L225 Difference]: With dead ends: 57799 [2021-11-07 01:10:33,032 INFO L226 Difference]: Without dead ends: 38529 [2021-11-07 01:10:33,062 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:10:33,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38529 states. [2021-11-07 01:10:35,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38529 to 38339. [2021-11-07 01:10:35,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38339 states, 38335 states have (on average 1.8023738098343551) internal successors, (69094), 38338 states have internal predecessors, (69094), 0 states have call successors, (0), 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 01:10:35,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38339 states to 38339 states and 69094 transitions. [2021-11-07 01:10:35,493 INFO L78 Accepts]: Start accepts. Automaton has 38339 states and 69094 transitions. Word has length 72 [2021-11-07 01:10:35,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:10:35,493 INFO L470 AbstractCegarLoop]: Abstraction has 38339 states and 69094 transitions. [2021-11-07 01:10:35,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:35,493 INFO L276 IsEmpty]: Start isEmpty. Operand 38339 states and 69094 transitions. [2021-11-07 01:10:35,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 01:10:35,510 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:35,511 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] [2021-11-07 01:10:35,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:10:35,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:10:35,726 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 01:10:35,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:35,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1061407685, now seen corresponding path program 1 times [2021-11-07 01:10:35,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:10:35,728 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1854736991] [2021-11-07 01:10:35,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:35,728 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:10:35,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:10:35,729 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:10:35,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 01:10:36,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:36,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:10:36,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:10:36,612 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 01:10:36,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:10:36,804 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 01:10:36,804 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:10:36,804 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1854736991] [2021-11-07 01:10:36,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1854736991] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:36,804 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:10:36,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:10:36,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247826803] [2021-11-07 01:10:36,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:10:36,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:10:36,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:10:36,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:10:36,806 INFO L87 Difference]: Start difference. First operand 38339 states and 69094 transitions. Second operand has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:43,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:10:43,364 INFO L93 Difference]: Finished difference Result 148753 states and 267923 transitions. [2021-11-07 01:10:43,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:10:43,365 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-07 01:10:43,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:10:43,611 INFO L225 Difference]: With dead ends: 148753 [2021-11-07 01:10:43,612 INFO L226 Difference]: Without dead ends: 110667 [2021-11-07 01:10:43,656 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 140 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 01:10:43,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110667 states. [2021-11-07 01:10:46,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110667 to 38081. [2021-11-07 01:10:46,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38081 states, 38077 states have (on average 1.7874832576095805) internal successors, (68062), 38080 states have internal predecessors, (68062), 0 states have call successors, (0), 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 01:10:46,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38081 states to 38081 states and 68062 transitions. [2021-11-07 01:10:46,373 INFO L78 Accepts]: Start accepts. Automaton has 38081 states and 68062 transitions. Word has length 73 [2021-11-07 01:10:46,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:10:46,374 INFO L470 AbstractCegarLoop]: Abstraction has 38081 states and 68062 transitions. [2021-11-07 01:10:46,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:46,374 INFO L276 IsEmpty]: Start isEmpty. Operand 38081 states and 68062 transitions. [2021-11-07 01:10:46,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 01:10:46,381 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:46,382 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] [2021-11-07 01:10:46,395 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:10:46,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:10:46,591 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 01:10:46,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:46,591 INFO L85 PathProgramCache]: Analyzing trace with hash -2125047463, now seen corresponding path program 1 times [2021-11-07 01:10:46,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:10:46,592 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [351086565] [2021-11-07 01:10:46,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:46,592 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:10:46,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:10:46,593 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:10:46,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:10:47,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:47,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:10:47,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:10:47,445 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 01:10:47,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:10:47,609 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 01:10:47,609 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:10:47,610 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [351086565] [2021-11-07 01:10:47,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [351086565] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:47,610 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:10:47,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:10:47,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696944313] [2021-11-07 01:10:47,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:10:47,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:10:47,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:10:47,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:10:47,612 INFO L87 Difference]: Start difference. First operand 38081 states and 68062 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:49,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:10:49,467 INFO L93 Difference]: Finished difference Result 76093 states and 136004 transitions. [2021-11-07 01:10:49,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:10:49,467 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-07 01:10:49,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:10:49,524 INFO L225 Difference]: With dead ends: 76093 [2021-11-07 01:10:49,525 INFO L226 Difference]: Without dead ends: 38271 [2021-11-07 01:10:49,548 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 142 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 01:10:49,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38271 states. [2021-11-07 01:10:51,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38271 to 38081. [2021-11-07 01:10:51,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38081 states, 38077 states have (on average 1.7841216482390945) internal successors, (67934), 38080 states have internal predecessors, (67934), 0 states have call successors, (0), 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 01:10:51,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38081 states to 38081 states and 67934 transitions. [2021-11-07 01:10:51,547 INFO L78 Accepts]: Start accepts. Automaton has 38081 states and 67934 transitions. Word has length 73 [2021-11-07 01:10:51,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:10:51,547 INFO L470 AbstractCegarLoop]: Abstraction has 38081 states and 67934 transitions. [2021-11-07 01:10:51,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:10:51,547 INFO L276 IsEmpty]: Start isEmpty. Operand 38081 states and 67934 transitions. [2021-11-07 01:10:51,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 01:10:51,555 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:51,555 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:10:51,569 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:10:51,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:10:51,767 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 01:10:51,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:51,767 INFO L85 PathProgramCache]: Analyzing trace with hash 306320198, now seen corresponding path program 1 times [2021-11-07 01:10:51,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:10:51,768 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1423166323] [2021-11-07 01:10:51,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:51,768 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:10:51,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:10:51,768 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:10:51,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 01:10:52,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:10:52,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:10:52,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:10:52,636 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 01:10:52,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:10:52,799 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 01:10:52,799 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:10:52,799 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1423166323] [2021-11-07 01:10:52,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1423166323] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:10:52,799 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:10:52,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:10:52,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516043517] [2021-11-07 01:10:52,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:10:52,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:10:52,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:10:52,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:10:52,802 INFO L87 Difference]: Start difference. First operand 38081 states and 67934 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 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 01:10:55,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:10:55,917 INFO L93 Difference]: Finished difference Result 105831 states and 188430 transitions. [2021-11-07 01:10:55,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:10:55,917 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-07 01:10:55,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:10:56,030 INFO L225 Difference]: With dead ends: 105831 [2021-11-07 01:10:56,030 INFO L226 Difference]: Without dead ends: 67969 [2021-11-07 01:10:56,059 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 143 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 01:10:56,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67969 states. [2021-11-07 01:10:59,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67969 to 67779. [2021-11-07 01:10:59,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67779 states, 67775 states have (on average 1.7747989671707858) internal successors, (120287), 67778 states have internal predecessors, (120287), 0 states have call successors, (0), 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 01:10:59,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67779 states to 67779 states and 120287 transitions. [2021-11-07 01:10:59,722 INFO L78 Accepts]: Start accepts. Automaton has 67779 states and 120287 transitions. Word has length 73 [2021-11-07 01:10:59,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:10:59,722 INFO L470 AbstractCegarLoop]: Abstraction has 67779 states and 120287 transitions. [2021-11-07 01:10:59,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 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 01:10:59,723 INFO L276 IsEmpty]: Start isEmpty. Operand 67779 states and 120287 transitions. [2021-11-07 01:10:59,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 01:10:59,729 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:10:59,729 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] [2021-11-07 01:10:59,741 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-07 01:10:59,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:10:59,930 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 01:10:59,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:10:59,930 INFO L85 PathProgramCache]: Analyzing trace with hash -781901665, now seen corresponding path program 1 times [2021-11-07 01:10:59,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:10:59,931 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [486544001] [2021-11-07 01:10:59,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:10:59,931 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:10:59,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:10:59,932 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:10:59,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 01:11:00,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:00,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:11:00,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:11:00,915 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:00,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:11:01,160 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:01,160 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:11:01,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [486544001] [2021-11-07 01:11:01,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [486544001] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:11:01,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [235476344] [2021-11-07 01:11:01,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:01,161 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:11:01,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:11:01,168 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:11:01,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_811cd4b7-bf20-4b13-9102-7fb192fcc7b9/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-07 01:11:02,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:02,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:11:02,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:11:02,462 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:11:02,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:11:02,719 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:11:02,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [235476344] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:11:02,719 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:11:02,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [5, 5] total 16 [2021-11-07 01:11:02,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252004802] [2021-11-07 01:11:02,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 01:11:02,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:11:02,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 01:11:02,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:11:02,721 INFO L87 Difference]: Start difference. First operand 67779 states and 120287 transitions. Second operand has 10 states, 10 states have (on average 11.2) internal successors, (112), 10 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)