./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/openssl/s3_srvr.blast.02.i.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.02.i.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH --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 ed8aeb9026e55742483978e70317f047fa25f02ff8503d374d8418739263e98e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:11:17,784 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:11:17,786 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:11:17,817 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:11:17,818 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:11:17,819 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:11:17,821 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:11:17,824 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:11:17,826 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:11:17,827 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:11:17,828 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:11:17,830 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:11:17,831 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:11:17,832 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:11:17,834 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:11:17,835 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:11:17,836 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:11:17,837 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:11:17,840 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:11:17,842 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:11:17,844 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:11:17,846 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:11:17,847 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:11:17,849 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:11:17,853 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:11:17,860 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:11:17,861 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:11:17,862 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:11:17,863 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:11:17,865 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:11:17,866 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:11:17,867 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:11:17,869 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:11:17,870 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:11:17,872 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:11:17,872 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:11:17,873 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:11:17,873 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:11:17,873 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:11:17,874 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:11:17,875 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:11:17,876 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-03 04:11:17,925 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:11:17,925 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:11:17,927 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:11:17,927 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:11:17,928 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:11:17,928 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:11:17,928 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 04:11:17,928 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:11:17,933 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:11:17,933 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 04:11:17,934 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 04:11:17,934 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:11:17,934 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 04:11:17,934 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 04:11:17,934 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 04:11:17,935 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:11:17,935 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 04:11:17,936 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 04:11:17,936 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 04:11:17,936 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:11:17,936 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 04:11:17,936 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:11:17,936 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 04:11:17,937 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:11:17,937 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 04:11:17,937 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 04:11:17,937 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:11:17,937 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 04:11:17,937 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:11:17,938 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:11:17,938 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:11:17,938 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:11:17,938 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:11:17,939 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 04:11:17,939 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 04:11:17,939 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 04:11:17,939 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 04:11:17,939 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:11:17,940 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:11:17,940 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_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ed8aeb9026e55742483978e70317f047fa25f02ff8503d374d8418739263e98e [2021-11-03 04:11:18,184 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:11:18,210 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:11:18,212 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:11:18,213 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:11:18,214 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:11:18,215 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/openssl/s3_srvr.blast.02.i.cil-2.c [2021-11-03 04:11:18,292 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/data/7abc4b88e/a7331f74c6d04564abbbba434e830adb/FLAG661dc0a0d [2021-11-03 04:11:18,911 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:11:18,911 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/sv-benchmarks/c/openssl/s3_srvr.blast.02.i.cil-2.c [2021-11-03 04:11:18,941 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/data/7abc4b88e/a7331f74c6d04564abbbba434e830adb/FLAG661dc0a0d [2021-11-03 04:11:19,155 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/data/7abc4b88e/a7331f74c6d04564abbbba434e830adb [2021-11-03 04:11:19,157 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:11:19,159 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:11:19,160 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:11:19,161 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:11:19,164 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:11:19,165 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:11:19" (1/1) ... [2021-11-03 04:11:19,166 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12d608f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:11:19, skipping insertion in model container [2021-11-03 04:11:19,166 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:11:19" (1/1) ... [2021-11-03 04:11:19,186 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:11:19,245 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:11:19,657 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_b458b20d-8520-4e8c-a802-ab8cd5482c17/sv-benchmarks/c/openssl/s3_srvr.blast.02.i.cil-2.c[72502,72515] [2021-11-03 04:11:19,666 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:11:19,681 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) [2021-11-03 04:11:19,682 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@24f11911 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:11:19, skipping insertion in model container [2021-11-03 04:11:19,682 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:11:19,683 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-03 04:11:19,685 INFO L168 Benchmark]: Toolchain (without parser) took 524.94 ms. Allocated memory is still 117.4 MB. Free memory was 85.8 MB in the beginning and 80.8 MB in the end (delta: 5.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-03 04:11:19,686 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 117.4 MB. Free memory is still 70.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 04:11:19,698 INFO L168 Benchmark]: CACSL2BoogieTranslator took 522.34 ms. Allocated memory is still 117.4 MB. Free memory was 85.8 MB in the beginning and 80.8 MB in the end (delta: 5.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-03 04:11:19,701 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 117.4 MB. Free memory is still 70.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 522.34 ms. Allocated memory is still 117.4 MB. Free memory was 85.8 MB in the beginning and 80.8 MB in the end (delta: 5.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1050]: 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_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.02.i.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH --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 ed8aeb9026e55742483978e70317f047fa25f02ff8503d374d8418739263e98e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:11:21,966 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:11:21,968 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:11:22,032 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:11:22,033 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:11:22,039 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:11:22,041 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:11:22,046 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:11:22,050 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:11:22,060 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:11:22,062 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:11:22,064 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:11:22,064 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:11:22,067 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:11:22,069 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:11:22,075 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:11:22,077 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:11:22,079 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:11:22,081 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:11:22,091 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:11:22,093 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:11:22,094 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:11:22,098 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:11:22,099 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:11:22,103 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:11:22,104 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:11:22,104 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:11:22,106 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:11:22,106 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:11:22,108 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:11:22,108 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:11:22,109 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:11:22,111 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:11:22,112 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:11:22,113 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:11:22,114 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:11:22,115 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:11:22,115 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:11:22,115 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:11:22,117 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:11:22,118 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:11:22,123 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-03 04:11:22,166 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:11:22,166 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:11:22,168 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:11:22,168 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:11:22,168 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:11:22,168 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:11:22,169 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:11:22,169 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:11:22,169 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:11:22,171 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:11:22,172 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 04:11:22,172 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 04:11:22,172 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:11:22,172 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 04:11:22,172 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:11:22,173 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 04:11:22,173 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:11:22,173 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-03 04:11:22,173 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-03 04:11:22,174 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 04:11:22,174 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 04:11:22,174 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:11:22,174 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 04:11:22,175 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:11:22,175 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-03 04:11:22,175 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:11:22,175 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:11:22,175 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:11:22,176 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:11:22,176 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 04:11:22,176 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-03 04:11:22,176 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-03 04:11:22,177 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 04:11:22,177 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:11:22,177 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:11:22,177 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_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ed8aeb9026e55742483978e70317f047fa25f02ff8503d374d8418739263e98e [2021-11-03 04:11:22,585 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:11:22,621 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:11:22,624 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:11:22,626 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:11:22,627 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:11:22,629 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/openssl/s3_srvr.blast.02.i.cil-2.c [2021-11-03 04:11:22,690 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/data/b656d3a60/f0c01bbfb32040a2a47dd33cc7f4dd50/FLAGb2fa70df6 [2021-11-03 04:11:23,381 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:11:23,382 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/sv-benchmarks/c/openssl/s3_srvr.blast.02.i.cil-2.c [2021-11-03 04:11:23,404 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/data/b656d3a60/f0c01bbfb32040a2a47dd33cc7f4dd50/FLAGb2fa70df6 [2021-11-03 04:11:23,558 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/data/b656d3a60/f0c01bbfb32040a2a47dd33cc7f4dd50 [2021-11-03 04:11:23,560 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:11:23,562 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:11:23,563 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:11:23,564 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:11:23,567 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:11:23,568 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:11:23" (1/1) ... [2021-11-03 04:11:23,569 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@615699f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:11:23, skipping insertion in model container [2021-11-03 04:11:23,569 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:11:23" (1/1) ... [2021-11-03 04:11:23,577 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:11:23,636 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:11:24,065 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_b458b20d-8520-4e8c-a802-ab8cd5482c17/sv-benchmarks/c/openssl/s3_srvr.blast.02.i.cil-2.c[72502,72515] [2021-11-03 04:11:24,085 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:11:24,119 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-03 04:11:24,134 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:11:24,239 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_b458b20d-8520-4e8c-a802-ab8cd5482c17/sv-benchmarks/c/openssl/s3_srvr.blast.02.i.cil-2.c[72502,72515] [2021-11-03 04:11:24,242 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:11:24,250 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 04:11:24,352 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_b458b20d-8520-4e8c-a802-ab8cd5482c17/sv-benchmarks/c/openssl/s3_srvr.blast.02.i.cil-2.c[72502,72515] [2021-11-03 04:11:24,367 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:11:24,393 INFO L208 MainTranslator]: Completed translation [2021-11-03 04:11:24,394 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:11:24 WrapperNode [2021-11-03 04:11:24,394 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:11:24,396 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 04:11:24,396 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 04:11:24,396 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 04:11:24,403 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:11:24" (1/1) ... [2021-11-03 04:11:24,449 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:11:24" (1/1) ... [2021-11-03 04:11:24,495 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 04:11:24,496 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 04:11:24,496 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 04:11:24,496 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 04:11:24,505 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:11:24" (1/1) ... [2021-11-03 04:11:24,505 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:11:24" (1/1) ... [2021-11-03 04:11:24,515 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:11:24" (1/1) ... [2021-11-03 04:11:24,515 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:11:24" (1/1) ... [2021-11-03 04:11:24,581 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:11:24" (1/1) ... [2021-11-03 04:11:24,592 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:11:24" (1/1) ... [2021-11-03 04:11:24,596 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:11:24" (1/1) ... [2021-11-03 04:11:24,620 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 04:11:24,621 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 04:11:24,621 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 04:11:24,622 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 04:11:24,622 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:11:24" (1/1) ... [2021-11-03 04:11:24,634 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:11:24,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:11:24,659 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 04:11:24,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 04:11:24,708 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-03 04:11:24,709 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-03 04:11:24,710 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 04:11:24,711 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-03 04:11:24,711 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-03 04:11:24,711 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-03 04:11:24,711 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 04:11:24,711 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 04:11:24,712 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-03 04:11:24,915 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-03 04:11:32,566 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-11-03 04:11:32,566 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-11-03 04:11:32,573 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 04:11:32,573 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-11-03 04:11:32,575 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:11:32 BoogieIcfgContainer [2021-11-03 04:11:32,576 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 04:11:32,577 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 04:11:32,578 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 04:11:32,580 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 04:11:32,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:11:23" (1/3) ... [2021-11-03 04:11:32,581 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ab7a36f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:11:32, skipping insertion in model container [2021-11-03 04:11:32,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:11:24" (2/3) ... [2021-11-03 04:11:32,582 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ab7a36f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:11:32, skipping insertion in model container [2021-11-03 04:11:32,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:11:32" (3/3) ... [2021-11-03 04:11:32,583 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.02.i.cil-2.c [2021-11-03 04:11:32,588 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 04:11:32,589 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-03 04:11:32,636 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 04:11:32,642 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 [2021-11-03 04:11:32,642 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-03 04:11:32,660 INFO L276 IsEmpty]: Start isEmpty. Operand has 145 states, 143 states have (on average 1.7062937062937062) internal successors, (244), 144 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:11:32,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-03 04:11:32,669 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:11:32,670 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] [2021-11-03 04:11:32,670 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:11:32,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:11:32,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1430118927, now seen corresponding path program 1 times [2021-11-03 04:11:32,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:11:32,689 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [509070355] [2021-11-03 04:11:32,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:11:32,690 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:11:32,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:11:32,703 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:11:32,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-03 04:11:32,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:11:32,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:11:33,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:11:33,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:11:33,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:11:33,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:11:33,709 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:11:33,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [509070355] [2021-11-03 04:11:33,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [509070355] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:11:33,710 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:11:33,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 04:11:33,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334544409] [2021-11-03 04:11:33,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:11:33,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:11:33,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:11:33,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:11:33,733 INFO L87 Difference]: Start difference. First operand has 145 states, 143 states have (on average 1.7062937062937062) internal successors, (244), 144 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:11:33,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:11:33,910 INFO L93 Difference]: Finished difference Result 542 states and 920 transitions. [2021-11-03 04:11:33,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:11:33,912 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-03 04:11:33,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:11:33,936 INFO L225 Difference]: With dead ends: 542 [2021-11-03 04:11:33,937 INFO L226 Difference]: Without dead ends: 368 [2021-11-03 04:11:33,941 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 [2021-11-03 04:11:33,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-11-03 04:11:34,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 368. [2021-11-03 04:11:34,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 1.5231607629427792) internal successors, (559), 367 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:11:34,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 559 transitions. [2021-11-03 04:11:34,037 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 559 transitions. Word has length 47 [2021-11-03 04:11:34,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:11:34,038 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 559 transitions. [2021-11-03 04:11:34,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:11:34,038 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 559 transitions. [2021-11-03 04:11:34,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-03 04:11:34,051 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:11:34,051 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:11:34,072 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-03 04:11:34,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:11:34,273 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:11:34,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:11:34,274 INFO L85 PathProgramCache]: Analyzing trace with hash -483730754, now seen corresponding path program 1 times [2021-11-03 04:11:34,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:11:34,276 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [803173162] [2021-11-03 04:11:34,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:11:34,276 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:11:34,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:11:34,286 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:11:34,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-03 04:11:34,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:11:34,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:11:34,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:11:34,919 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:11:34,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:11:35,263 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:11:35,263 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:11:35,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [803173162] [2021-11-03 04:11:35,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [803173162] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:11:35,264 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:11:35,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 04:11:35,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135174742] [2021-11-03 04:11:35,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:11:35,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:11:35,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:11:35,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:11:35,268 INFO L87 Difference]: Start difference. First operand 368 states and 559 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:11:35,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:11:35,657 INFO L93 Difference]: Finished difference Result 723 states and 1103 transitions. [2021-11-03 04:11:35,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:11:35,659 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-11-03 04:11:35,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:11:35,662 INFO L225 Difference]: With dead ends: 723 [2021-11-03 04:11:35,663 INFO L226 Difference]: Without dead ends: 484 [2021-11-03 04:11:35,665 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:11:35,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-11-03 04:11:35,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 484. [2021-11-03 04:11:35,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 483 states have (on average 1.5196687370600415) internal successors, (734), 483 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:11:35,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 734 transitions. [2021-11-03 04:11:35,687 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 734 transitions. Word has length 87 [2021-11-03 04:11:35,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:11:35,688 INFO L470 AbstractCegarLoop]: Abstraction has 484 states and 734 transitions. [2021-11-03 04:11:35,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:11:35,689 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 734 transitions. [2021-11-03 04:11:35,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-03 04:11:35,691 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:11:35,691 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2021-11-03 04:11:35,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-03 04:11:35,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:11:35,910 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:11:35,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:11:35,910 INFO L85 PathProgramCache]: Analyzing trace with hash 595564554, now seen corresponding path program 1 times [2021-11-03 04:11:35,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:11:35,912 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2048685476] [2021-11-03 04:11:35,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:11:35,912 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:11:35,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:11:35,913 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:11:35,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-03 04:11:36,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:11:36,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:11:36,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:11:36,671 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 04:11:36,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:11:37,043 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 04:11:37,043 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:11:37,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2048685476] [2021-11-03 04:11:37,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2048685476] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:11:37,044 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:11:37,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 04:11:37,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260085310] [2021-11-03 04:11:37,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:11:37,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:11:37,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:11:37,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:11:37,046 INFO L87 Difference]: Start difference. First operand 484 states and 734 transitions. Second operand has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:11:37,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:11:37,446 INFO L93 Difference]: Finished difference Result 1074 states and 1637 transitions. [2021-11-03 04:11:37,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:11:37,447 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 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 109 [2021-11-03 04:11:37,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:11:37,452 INFO L225 Difference]: With dead ends: 1074 [2021-11-03 04:11:37,452 INFO L226 Difference]: Without dead ends: 719 [2021-11-03 04:11:37,453 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:11:37,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2021-11-03 04:11:37,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 719. [2021-11-03 04:11:37,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 719 states, 718 states have (on average 1.5181058495821727) internal successors, (1090), 718 states have internal predecessors, (1090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:11:37,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 719 states to 719 states and 1090 transitions. [2021-11-03 04:11:37,482 INFO L78 Accepts]: Start accepts. Automaton has 719 states and 1090 transitions. Word has length 109 [2021-11-03 04:11:37,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:11:37,483 INFO L470 AbstractCegarLoop]: Abstraction has 719 states and 1090 transitions. [2021-11-03 04:11:37,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:11:37,483 INFO L276 IsEmpty]: Start isEmpty. Operand 719 states and 1090 transitions. [2021-11-03 04:11:37,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-03 04:11:37,486 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:11:37,486 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-03 04:11:37,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-03 04:11:37,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:11:37,713 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:11:37,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:11:37,713 INFO L85 PathProgramCache]: Analyzing trace with hash -65336556, now seen corresponding path program 1 times [2021-11-03 04:11:37,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:11:37,715 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [713083619] [2021-11-03 04:11:37,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:11:37,715 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:11:37,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:11:37,718 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:11:37,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-03 04:11:38,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:11:38,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-03 04:11:38,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:11:38,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-03 04:11:38,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-03 04:11:38,590 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:11:38,593 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 169 [2021-11-03 04:11:38,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 169 treesize of output 158 [2021-11-03 04:11:39,158 INFO L354 Elim1Store]: treesize reduction 1607, result has 2.8 percent of original size [2021-11-03 04:11:39,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 8 case distinctions, treesize of input 469 treesize of output 441 [2021-11-03 04:11:39,248 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:11:39,250 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 169 [2021-11-03 04:11:39,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 169 treesize of output 158 [2021-11-03 04:11:39,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:11:39,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:11:39,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:11:39,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:11:39,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:11:39,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:11:39,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:11:39,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:11:39,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:11:39,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:11:39,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:11:39,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:11:39,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:11:39,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:11:39,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:11:39,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:11:39,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:11:39,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:11:39,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:11:39,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:11:39,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:11:39,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:11:39,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:11:39,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:11:39,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:11:39,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:11:39,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:11:39,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:11:39,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:11:39,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:11:39,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:11:39,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:11:39,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:11:39,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:11:39,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:11:39,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:11:39,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:11:39,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:11:39,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:11:39,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:11:39,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:11:39,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:11:39,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 36 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 49 [2021-11-03 04:11:39,537 INFO L354 Elim1Store]: treesize reduction 340, result has 2.6 percent of original size [2021-11-03 04:11:39,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 62 treesize of output 13 [2021-11-03 04:11:39,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:11:39,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:11:39,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:11:39,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:11:39,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:11:39,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:11:39,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:11:39,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:11:39,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:11:39,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:11:39,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 13 [2021-11-03 04:11:39,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-11-03 04:11:39,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-11-03 04:11:40,146 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2021-11-03 04:11:40,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:11:40,789 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:11:40,791 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 181 [2021-11-03 04:11:40,798 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:11:40,800 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 238 [2021-11-03 04:11:40,966 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:11:40,973 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 287 [2021-11-03 04:11:40,980 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:11:40,983 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 404 [2021-11-03 04:11:40,993 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:11:40,996 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 461 [2021-11-03 04:11:41,008 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:11:41,011 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 578 [2021-11-03 04:11:41,319 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2021-11-03 04:11:41,319 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:11:41,319 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [713083619] [2021-11-03 04:11:41,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [713083619] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:11:41,320 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:11:41,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-03 04:11:41,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070328747] [2021-11-03 04:11:41,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 04:11:41,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:11:41,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 04:11:41,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:11:41,322 INFO L87 Difference]: Start difference. First operand 719 states and 1090 transitions. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:12:00,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:12:00,951 INFO L93 Difference]: Finished difference Result 1435 states and 2176 transitions. [2021-11-03 04:12:00,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:12:00,954 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-11-03 04:12:00,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:12:00,960 INFO L225 Difference]: With dead ends: 1435 [2021-11-03 04:12:00,960 INFO L226 Difference]: Without dead ends: 719 [2021-11-03 04:12:00,962 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 291 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-03 04:12:00,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2021-11-03 04:12:01,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 719. [2021-11-03 04:12:01,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 719 states, 718 states have (on average 1.5167130919220055) internal successors, (1089), 718 states have internal predecessors, (1089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:12:01,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 719 states to 719 states and 1089 transitions. [2021-11-03 04:12:01,006 INFO L78 Accepts]: Start accepts. Automaton has 719 states and 1089 transitions. Word has length 150 [2021-11-03 04:12:01,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:12:01,007 INFO L470 AbstractCegarLoop]: Abstraction has 719 states and 1089 transitions. [2021-11-03 04:12:01,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:12:01,007 INFO L276 IsEmpty]: Start isEmpty. Operand 719 states and 1089 transitions. [2021-11-03 04:12:01,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-03 04:12:01,010 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:12:01,011 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-03 04:12:01,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-03 04:12:01,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:12:01,230 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:12:01,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:12:01,231 INFO L85 PathProgramCache]: Analyzing trace with hash -329984046, now seen corresponding path program 1 times [2021-11-03 04:12:01,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:12:01,232 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1732420939] [2021-11-03 04:12:01,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:12:01,233 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:12:01,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:12:01,236 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:12:01,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-03 04:12:02,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:12:02,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:12:02,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:12:02,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:12:02,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:12:02,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:12:02,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:12:02,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:12:02,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:12:02,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:12:02,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:12:02,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:12:02,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:12:02,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:12:02,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:12:02,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:12:02,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:12:02,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:12:02,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:12:02,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:12:02,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:12:02,891 INFO L354 Elim1Store]: treesize reduction 1132, result has 5.5 percent of original size [2021-11-03 04:12:02,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 76 [2021-11-03 04:12:04,599 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 04:12:04,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 109 treesize of output 37 [2021-11-03 04:12:04,801 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 131 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-03 04:12:04,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:12:05,401 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 131 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-03 04:12:05,401 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:12:05,401 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1732420939] [2021-11-03 04:12:05,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1732420939] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:12:05,402 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:12:05,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 04:12:05,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954269640] [2021-11-03 04:12:05,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:12:05,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:12:05,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:12:05,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:12:05,404 INFO L87 Difference]: Start difference. First operand 719 states and 1089 transitions. Second operand has 6 states, 6 states have (on average 23.833333333333332) internal successors, (143), 6 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:12:46,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:12:46,255 INFO L93 Difference]: Finished difference Result 2592 states and 3954 transitions. [2021-11-03 04:12:46,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:12:46,258 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.833333333333332) internal successors, (143), 6 states have internal predecessors, (143), 0 states have call successors, (0), 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 150 [2021-11-03 04:12:46,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:12:46,272 INFO L225 Difference]: With dead ends: 2592 [2021-11-03 04:12:46,272 INFO L226 Difference]: Without dead ends: 1883 [2021-11-03 04:12:46,274 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 294 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:12:46,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1883 states. [2021-11-03 04:12:46,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1883 to 851. [2021-11-03 04:12:46,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 851 states, 850 states have (on average 1.5494117647058823) internal successors, (1317), 850 states have internal predecessors, (1317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:12:46,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 851 states to 851 states and 1317 transitions. [2021-11-03 04:12:46,342 INFO L78 Accepts]: Start accepts. Automaton has 851 states and 1317 transitions. Word has length 150 [2021-11-03 04:12:46,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:12:46,343 INFO L470 AbstractCegarLoop]: Abstraction has 851 states and 1317 transitions. [2021-11-03 04:12:46,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.833333333333332) internal successors, (143), 6 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:12:46,344 INFO L276 IsEmpty]: Start isEmpty. Operand 851 states and 1317 transitions. [2021-11-03 04:12:46,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-03 04:12:46,348 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:12:46,348 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-03 04:12:46,377 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-03 04:12:46,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:12:46,569 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:12:46,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:12:46,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1210495758, now seen corresponding path program 1 times [2021-11-03 04:12:46,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:12:46,571 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1238308911] [2021-11-03 04:12:46,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:12:46,572 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:12:46,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:12:46,573 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:12:46,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-03 04:12:47,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:12:47,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:12:47,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:12:47,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:12:47,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:12:47,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:12:47,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:12:47,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:12:47,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:12:47,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:12:47,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:12:47,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:12:47,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:12:47,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:12:47,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:12:47,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:12:47,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:12:47,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:12:47,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:12:47,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:12:47,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:12:48,332 INFO L354 Elim1Store]: treesize reduction 1132, result has 5.5 percent of original size [2021-11-03 04:12:48,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 76 [2021-11-03 04:12:50,008 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 04:12:50,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 109 treesize of output 37 [2021-11-03 04:12:50,187 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 133 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-03 04:12:50,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:12:50,756 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 133 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-03 04:12:50,757 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:12:50,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1238308911] [2021-11-03 04:12:50,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1238308911] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:12:50,757 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:12:50,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 04:12:50,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836065897] [2021-11-03 04:12:50,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:12:50,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:12:50,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:12:50,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:12:50,759 INFO L87 Difference]: Start difference. First operand 851 states and 1317 transitions. Second operand has 6 states, 6 states have (on average 24.166666666666668) internal successors, (145), 6 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:13:30,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:13:30,298 INFO L93 Difference]: Finished difference Result 2834 states and 4375 transitions. [2021-11-03 04:13:30,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:13:30,301 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 24.166666666666668) internal successors, (145), 6 states have internal predecessors, (145), 0 states have call successors, (0), 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 151 [2021-11-03 04:13:30,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:13:30,316 INFO L225 Difference]: With dead ends: 2834 [2021-11-03 04:13:30,316 INFO L226 Difference]: Without dead ends: 1993 [2021-11-03 04:13:30,318 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 296 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:13:30,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1993 states. [2021-11-03 04:13:30,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1993 to 989. [2021-11-03 04:13:30,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 989 states, 988 states have (on average 1.575910931174089) internal successors, (1557), 988 states have internal predecessors, (1557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:13:30,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 989 states to 989 states and 1557 transitions. [2021-11-03 04:13:30,398 INFO L78 Accepts]: Start accepts. Automaton has 989 states and 1557 transitions. Word has length 151 [2021-11-03 04:13:30,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:13:30,399 INFO L470 AbstractCegarLoop]: Abstraction has 989 states and 1557 transitions. [2021-11-03 04:13:30,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.166666666666668) internal successors, (145), 6 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:13:30,399 INFO L276 IsEmpty]: Start isEmpty. Operand 989 states and 1557 transitions. [2021-11-03 04:13:30,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-11-03 04:13:30,403 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:13:30,403 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-03 04:13:30,425 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-03 04:13:30,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:13:30,622 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:13:30,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:13:30,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1783349868, now seen corresponding path program 1 times [2021-11-03 04:13:30,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:13:30,623 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1211271344] [2021-11-03 04:13:30,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:13:30,623 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:13:30,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:13:30,624 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:13:30,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-03 04:13:31,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:13:31,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:13:31,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:13:32,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:13:32,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:13:32,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:13:32,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:13:32,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:13:32,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:13:32,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:13:32,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:13:32,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:13:32,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:13:32,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:13:32,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:13:32,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:13:32,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:13:32,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:13:32,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:13:32,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:13:32,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:13:32,546 INFO L354 Elim1Store]: treesize reduction 1132, result has 5.5 percent of original size [2021-11-03 04:13:32,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 76 [2021-11-03 04:13:34,050 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 04:13:34,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 109 treesize of output 37 [2021-11-03 04:13:34,302 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 184 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-03 04:13:34,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:13:34,872 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 184 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-03 04:13:34,872 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:13:34,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1211271344] [2021-11-03 04:13:34,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1211271344] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:13:34,872 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:13:34,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 04:13:34,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084715434] [2021-11-03 04:13:34,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:13:34,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:13:34,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:13:34,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:13:34,875 INFO L87 Difference]: Start difference. First operand 989 states and 1557 transitions. Second operand has 6 states, 6 states have (on average 23.5) internal successors, (141), 6 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:14:35,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:14:35,572 INFO L93 Difference]: Finished difference Result 2948 states and 4583 transitions. [2021-11-03 04:14:35,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:14:35,575 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.5) internal successors, (141), 6 states have internal predecessors, (141), 0 states have call successors, (0), 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 167 [2021-11-03 04:14:35,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:14:35,591 INFO L225 Difference]: With dead ends: 2948 [2021-11-03 04:14:35,591 INFO L226 Difference]: Without dead ends: 2131 [2021-11-03 04:14:35,593 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:14:35,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2131 states. [2021-11-03 04:14:35,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2131 to 1103. [2021-11-03 04:14:35,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1103 states, 1102 states have (on average 1.5816696914700545) internal successors, (1743), 1102 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:14:35,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1103 states to 1103 states and 1743 transitions. [2021-11-03 04:14:35,681 INFO L78 Accepts]: Start accepts. Automaton has 1103 states and 1743 transitions. Word has length 167 [2021-11-03 04:14:35,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:14:35,682 INFO L470 AbstractCegarLoop]: Abstraction has 1103 states and 1743 transitions. [2021-11-03 04:14:35,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.5) internal successors, (141), 6 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:14:35,682 INFO L276 IsEmpty]: Start isEmpty. Operand 1103 states and 1743 transitions. [2021-11-03 04:14:35,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-11-03 04:14:35,686 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:14:35,687 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-03 04:14:35,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-03 04:14:35,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:14:35,906 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:14:35,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:14:35,907 INFO L85 PathProgramCache]: Analyzing trace with hash 113892171, now seen corresponding path program 1 times [2021-11-03 04:14:35,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:14:35,908 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [849963367] [2021-11-03 04:14:35,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:14:35,909 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:14:35,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:14:35,910 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:14:35,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-03 04:14:37,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:14:37,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:14:37,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:14:37,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:14:37,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:14:37,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:14:37,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:14:37,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:14:37,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:14:37,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:14:37,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:14:37,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:14:37,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:14:37,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:14:37,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:14:37,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:14:37,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:14:37,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:14:37,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:14:37,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:14:37,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:14:37,901 INFO L354 Elim1Store]: treesize reduction 1132, result has 5.5 percent of original size [2021-11-03 04:14:37,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 76 [2021-11-03 04:14:39,121 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 04:14:39,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 109 treesize of output 37 [2021-11-03 04:14:39,348 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 188 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-03 04:14:39,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:14:39,900 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 188 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-03 04:14:39,901 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:14:39,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [849963367] [2021-11-03 04:14:39,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [849963367] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:14:39,901 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:14:39,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 04:14:39,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527150477] [2021-11-03 04:14:39,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:14:39,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:14:39,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:14:39,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:14:39,906 INFO L87 Difference]: Start difference. First operand 1103 states and 1743 transitions. Second operand has 6 states, 6 states have (on average 23.833333333333332) internal successors, (143), 6 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:15:29,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:15:29,345 INFO L93 Difference]: Finished difference Result 3054 states and 4741 transitions. [2021-11-03 04:15:29,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:15:29,348 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.833333333333332) internal successors, (143), 6 states have internal predecessors, (143), 0 states have call successors, (0), 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 168 [2021-11-03 04:15:29,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:15:29,362 INFO L225 Difference]: With dead ends: 3054 [2021-11-03 04:15:29,363 INFO L226 Difference]: Without dead ends: 2142 [2021-11-03 04:15:29,364 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:15:29,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2142 states. [2021-11-03 04:15:29,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2142 to 1120. [2021-11-03 04:15:29,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1120 states, 1119 states have (on average 1.5755138516532619) internal successors, (1763), 1119 states have internal predecessors, (1763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:15:29,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1120 states to 1120 states and 1763 transitions. [2021-11-03 04:15:29,453 INFO L78 Accepts]: Start accepts. Automaton has 1120 states and 1763 transitions. Word has length 168 [2021-11-03 04:15:29,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:15:29,454 INFO L470 AbstractCegarLoop]: Abstraction has 1120 states and 1763 transitions. [2021-11-03 04:15:29,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.833333333333332) internal successors, (143), 6 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:15:29,455 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states and 1763 transitions. [2021-11-03 04:15:29,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-11-03 04:15:29,459 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:15:29,459 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-03 04:15:29,489 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-03 04:15:29,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:15:29,678 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:15:29,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:15:29,678 INFO L85 PathProgramCache]: Analyzing trace with hash 137677863, now seen corresponding path program 1 times [2021-11-03 04:15:29,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:15:29,679 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1231007050] [2021-11-03 04:15:29,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:15:29,679 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:15:29,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:15:29,681 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:15:29,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-03 04:15:31,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:15:31,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:15:31,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:15:31,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:15:31,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:15:31,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:15:31,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:15:31,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:15:31,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:15:31,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:15:31,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:15:31,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:15:31,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:15:31,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:15:31,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:15:31,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:15:31,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:15:31,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:15:31,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:15:31,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:15:31,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:15:31,868 INFO L354 Elim1Store]: treesize reduction 1132, result has 5.5 percent of original size [2021-11-03 04:15:31,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 76 [2021-11-03 04:15:33,211 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 04:15:33,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 109 treesize of output 37 [2021-11-03 04:15:33,438 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 192 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-03 04:15:33,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:15:34,029 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 192 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-03 04:15:34,030 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:15:34,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1231007050] [2021-11-03 04:15:34,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1231007050] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:15:34,030 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:15:34,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 04:15:34,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431871814] [2021-11-03 04:15:34,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:15:34,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:15:34,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:15:34,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:15:34,032 INFO L87 Difference]: Start difference. First operand 1120 states and 1763 transitions. Second operand has 6 states, 6 states have (on average 24.166666666666668) internal successors, (145), 6 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:16:16,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:16:16,446 INFO L93 Difference]: Finished difference Result 3165 states and 4905 transitions. [2021-11-03 04:16:16,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:16:16,450 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 24.166666666666668) internal successors, (145), 6 states have internal predecessors, (145), 0 states have call successors, (0), 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 169 [2021-11-03 04:16:16,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:16:16,465 INFO L225 Difference]: With dead ends: 3165 [2021-11-03 04:16:16,465 INFO L226 Difference]: Without dead ends: 2248 [2021-11-03 04:16:16,466 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:16:16,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2248 states. [2021-11-03 04:16:16,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2248 to 1246. [2021-11-03 04:16:16,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1246 states, 1245 states have (on average 1.5751004016064256) internal successors, (1961), 1245 states have internal predecessors, (1961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:16:16,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1246 states to 1246 states and 1961 transitions. [2021-11-03 04:16:16,570 INFO L78 Accepts]: Start accepts. Automaton has 1246 states and 1961 transitions. Word has length 169 [2021-11-03 04:16:16,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:16:16,570 INFO L470 AbstractCegarLoop]: Abstraction has 1246 states and 1961 transitions. [2021-11-03 04:16:16,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.166666666666668) internal successors, (145), 6 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:16:16,571 INFO L276 IsEmpty]: Start isEmpty. Operand 1246 states and 1961 transitions. [2021-11-03 04:16:16,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-11-03 04:16:16,575 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:16:16,576 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-03 04:16:16,601 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-03 04:16:16,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:16:16,798 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:16:16,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:16:16,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1262080839, now seen corresponding path program 1 times [2021-11-03 04:16:16,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:16:16,799 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1654780344] [2021-11-03 04:16:16,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:16:16,799 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:16:16,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:16:16,800 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:16:16,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-03 04:16:18,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:16:18,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:16:18,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:16:18,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:16:18,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:16:18,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:16:18,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:16:18,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:16:18,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:16:18,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:16:18,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:16:18,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:16:18,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:16:18,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:16:18,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:16:18,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:16:18,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:16:18,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:16:18,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:16:18,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:16:18,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:16:19,184 INFO L354 Elim1Store]: treesize reduction 1132, result has 5.5 percent of original size [2021-11-03 04:16:19,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 76 [2021-11-03 04:16:21,101 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 04:16:21,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 109 treesize of output 37 [2021-11-03 04:16:21,355 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 209 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-03 04:16:21,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:16:22,022 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 209 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-03 04:16:22,022 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:16:22,022 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1654780344] [2021-11-03 04:16:22,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1654780344] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:16:22,022 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:16:22,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 04:16:22,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451472045] [2021-11-03 04:16:22,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:16:22,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:16:22,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:16:22,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:16:22,025 INFO L87 Difference]: Start difference. First operand 1246 states and 1961 transitions. Second operand has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:16:59,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:16:59,109 INFO L93 Difference]: Finished difference Result 3704 states and 5750 transitions. [2021-11-03 04:16:59,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:16:59,112 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 0 states have call successors, (0), 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 177 [2021-11-03 04:16:59,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:16:59,127 INFO L225 Difference]: With dead ends: 3704 [2021-11-03 04:16:59,127 INFO L226 Difference]: Without dead ends: 2479 [2021-11-03 04:16:59,130 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 348 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:16:59,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2479 states. [2021-11-03 04:16:59,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2479 to 1536. [2021-11-03 04:16:59,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1536 states, 1535 states have (on average 1.5863192182410424) internal successors, (2435), 1535 states have internal predecessors, (2435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:16:59,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1536 states to 1536 states and 2435 transitions. [2021-11-03 04:16:59,268 INFO L78 Accepts]: Start accepts. Automaton has 1536 states and 2435 transitions. Word has length 177 [2021-11-03 04:16:59,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:16:59,270 INFO L470 AbstractCegarLoop]: Abstraction has 1536 states and 2435 transitions. [2021-11-03 04:16:59,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:16:59,271 INFO L276 IsEmpty]: Start isEmpty. Operand 1536 states and 2435 transitions. [2021-11-03 04:16:59,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-03 04:16:59,283 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:16:59,284 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 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] [2021-11-03 04:16:59,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-03 04:16:59,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:16:59,511 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:16:59,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:16:59,511 INFO L85 PathProgramCache]: Analyzing trace with hash -440646389, now seen corresponding path program 1 times [2021-11-03 04:16:59,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:16:59,513 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [853768209] [2021-11-03 04:16:59,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:16:59,513 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:16:59,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:16:59,514 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:16:59,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-03 04:17:01,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:17:01,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:17:01,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:17:01,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:17:01,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:17:01,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:17:01,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:17:01,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:17:01,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:17:01,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:17:01,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:17:01,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:17:01,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:17:01,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:17:01,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:17:01,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:17:01,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:17:01,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:17:01,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:17:01,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:17:01,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:17:01,952 INFO L354 Elim1Store]: treesize reduction 1132, result has 5.5 percent of original size [2021-11-03 04:17:01,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 76 [2021-11-03 04:17:03,922 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 04:17:03,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 109 treesize of output 37 [2021-11-03 04:17:04,144 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 211 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-03 04:17:04,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:17:04,797 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 211 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-03 04:17:04,798 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:17:04,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [853768209] [2021-11-03 04:17:04,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [853768209] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:17:04,798 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:17:04,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 04:17:04,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119313217] [2021-11-03 04:17:04,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:17:04,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:17:04,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:17:04,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:17:04,800 INFO L87 Difference]: Start difference. First operand 1536 states and 2435 transitions. Second operand has 6 states, 6 states have (on average 27.333333333333332) internal successors, (164), 6 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:17:46,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:17:46,201 INFO L93 Difference]: Finished difference Result 4032 states and 6293 transitions. [2021-11-03 04:17:46,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:17:46,204 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 27.333333333333332) internal successors, (164), 6 states have internal predecessors, (164), 0 states have call successors, (0), 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 178 [2021-11-03 04:17:46,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:17:46,216 INFO L225 Difference]: With dead ends: 4032 [2021-11-03 04:17:46,216 INFO L226 Difference]: Without dead ends: 2517 [2021-11-03 04:17:46,218 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 350 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:17:46,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2517 states. [2021-11-03 04:17:46,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2517 to 1590. [2021-11-03 04:17:46,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1590 states, 1589 states have (on average 1.592825676526117) internal successors, (2531), 1589 states have internal predecessors, (2531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:17:46,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1590 states to 1590 states and 2531 transitions. [2021-11-03 04:17:46,387 INFO L78 Accepts]: Start accepts. Automaton has 1590 states and 2531 transitions. Word has length 178 [2021-11-03 04:17:46,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:17:46,401 INFO L470 AbstractCegarLoop]: Abstraction has 1590 states and 2531 transitions. [2021-11-03 04:17:46,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 27.333333333333332) internal successors, (164), 6 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:17:46,402 INFO L276 IsEmpty]: Start isEmpty. Operand 1590 states and 2531 transitions. [2021-11-03 04:17:46,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-11-03 04:17:46,408 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:17:46,409 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 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] [2021-11-03 04:17:46,470 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-03 04:17:46,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:17:46,610 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:17:46,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:17:46,610 INFO L85 PathProgramCache]: Analyzing trace with hash 2080444553, now seen corresponding path program 1 times [2021-11-03 04:17:46,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:17:46,612 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [616202316] [2021-11-03 04:17:46,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:17:46,612 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:17:46,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:17:46,613 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:17:46,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-03 04:17:48,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:17:48,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:17:48,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:17:48,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:17:48,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:17:48,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:17:48,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:17:48,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:17:48,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:17:48,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:17:48,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:17:48,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:17:48,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:17:48,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:17:48,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:17:48,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:17:48,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:17:48,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:17:48,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:17:48,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:17:48,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:17:48,939 INFO L354 Elim1Store]: treesize reduction 1132, result has 5.5 percent of original size [2021-11-03 04:17:48,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 76 [2021-11-03 04:17:51,018 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 04:17:51,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 109 treesize of output 37 [2021-11-03 04:17:51,240 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 213 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-03 04:17:51,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:17:51,936 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 213 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-03 04:17:51,937 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:17:51,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [616202316] [2021-11-03 04:17:51,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [616202316] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:17:51,937 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:17:51,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 04:17:51,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256826367] [2021-11-03 04:17:51,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:17:51,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:17:51,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:17:51,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:17:51,939 INFO L87 Difference]: Start difference. First operand 1590 states and 2531 transitions. Second operand has 6 states, 6 states have (on average 27.666666666666668) internal successors, (166), 6 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:18:24,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:18:24,263 INFO L93 Difference]: Finished difference Result 4167 states and 6520 transitions. [2021-11-03 04:18:24,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:18:24,266 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 27.666666666666668) internal successors, (166), 6 states have internal predecessors, (166), 0 states have call successors, (0), 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 179 [2021-11-03 04:18:24,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:18:24,277 INFO L225 Difference]: With dead ends: 4167 [2021-11-03 04:18:24,277 INFO L226 Difference]: Without dead ends: 2598 [2021-11-03 04:18:24,279 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 352 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:18:24,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2598 states. [2021-11-03 04:18:24,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2598 to 1782. [2021-11-03 04:18:24,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1782 states, 1781 states have (on average 1.5929253228523301) internal successors, (2837), 1781 states have internal predecessors, (2837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:18:24,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1782 states to 1782 states and 2837 transitions. [2021-11-03 04:18:24,427 INFO L78 Accepts]: Start accepts. Automaton has 1782 states and 2837 transitions. Word has length 179 [2021-11-03 04:18:24,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:18:24,427 INFO L470 AbstractCegarLoop]: Abstraction has 1782 states and 2837 transitions. [2021-11-03 04:18:24,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 27.666666666666668) internal successors, (166), 6 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:18:24,428 INFO L276 IsEmpty]: Start isEmpty. Operand 1782 states and 2837 transitions. [2021-11-03 04:18:24,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-11-03 04:18:24,433 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:18:24,434 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-03 04:18:24,462 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-03 04:18:24,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:18:24,649 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:18:24,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:18:24,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1105638902, now seen corresponding path program 1 times [2021-11-03 04:18:24,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:18:24,652 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1863786664] [2021-11-03 04:18:24,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:18:24,652 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:18:24,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:18:24,654 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:18:24,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-03 04:18:26,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:18:26,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:18:26,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:18:27,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:18:27,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:18:27,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:18:27,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:18:27,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:18:27,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:18:27,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:18:27,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:18:27,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:18:27,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:18:27,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:18:27,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:18:27,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:18:27,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:18:27,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:18:27,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:18:27,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:18:27,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:18:27,558 INFO L354 Elim1Store]: treesize reduction 1132, result has 5.5 percent of original size [2021-11-03 04:18:27,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 76 [2021-11-03 04:18:28,083 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 04:18:28,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 109 treesize of output 37 [2021-11-03 04:18:28,423 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 189 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-03 04:18:28,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:18:29,023 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 189 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-03 04:18:29,023 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:18:29,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1863786664] [2021-11-03 04:18:29,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1863786664] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:18:29,024 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:18:29,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 04:18:29,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710504352] [2021-11-03 04:18:29,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:18:29,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:18:29,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:18:29,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:18:29,026 INFO L87 Difference]: Start difference. First operand 1782 states and 2837 transitions. Second operand has 6 states, 6 states have (on average 22.5) internal successors, (135), 6 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:19:06,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:19:06,448 INFO L93 Difference]: Finished difference Result 4512 states and 7074 transitions. [2021-11-03 04:19:06,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:19:06,450 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.5) internal successors, (135), 6 states have internal predecessors, (135), 0 states have call successors, (0), 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 182 [2021-11-03 04:19:06,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:19:06,463 INFO L225 Difference]: With dead ends: 4512 [2021-11-03 04:19:06,463 INFO L226 Difference]: Without dead ends: 2751 [2021-11-03 04:19:06,465 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 358 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:19:06,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2751 states. [2021-11-03 04:19:06,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2751 to 1782. [2021-11-03 04:19:06,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1782 states, 1781 states have (on average 1.5693430656934306) internal successors, (2795), 1781 states have internal predecessors, (2795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:19:06,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1782 states to 1782 states and 2795 transitions. [2021-11-03 04:19:06,613 INFO L78 Accepts]: Start accepts. Automaton has 1782 states and 2795 transitions. Word has length 182 [2021-11-03 04:19:06,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:19:06,613 INFO L470 AbstractCegarLoop]: Abstraction has 1782 states and 2795 transitions. [2021-11-03 04:19:06,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.5) internal successors, (135), 6 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:19:06,614 INFO L276 IsEmpty]: Start isEmpty. Operand 1782 states and 2795 transitions. [2021-11-03 04:19:06,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-11-03 04:19:06,619 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:19:06,619 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-03 04:19:06,648 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-03 04:19:06,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:19:06,837 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:19:06,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:19:06,838 INFO L85 PathProgramCache]: Analyzing trace with hash 612161782, now seen corresponding path program 1 times [2021-11-03 04:19:06,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:19:06,839 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1382452121] [2021-11-03 04:19:06,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:19:06,840 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:19:06,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:19:06,841 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:19:06,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-03 04:19:09,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:19:09,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:19:09,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:19:09,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:19:09,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:19:09,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:19:09,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:19:09,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:19:09,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:19:09,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:19:09,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:19:09,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:19:09,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:19:09,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:19:09,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:19:09,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:19:09,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:19:09,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:19:09,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:19:09,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:19:09,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:19:09,917 INFO L354 Elim1Store]: treesize reduction 1132, result has 5.5 percent of original size [2021-11-03 04:19:09,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 76 [2021-11-03 04:19:10,693 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 04:19:10,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 109 treesize of output 37 [2021-11-03 04:19:11,071 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 195 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-03 04:19:11,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:19:11,691 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 195 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-03 04:19:11,691 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:19:11,692 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1382452121] [2021-11-03 04:19:11,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1382452121] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:19:11,692 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:19:11,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 04:19:11,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418369112] [2021-11-03 04:19:11,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:19:11,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:19:11,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:19:11,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:19:11,694 INFO L87 Difference]: Start difference. First operand 1782 states and 2795 transitions. Second operand has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:19:45,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:19:45,819 INFO L93 Difference]: Finished difference Result 4655 states and 7212 transitions. [2021-11-03 04:19:45,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:19:45,821 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 states have internal predecessors, (136), 0 states have call successors, (0), 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 182 [2021-11-03 04:19:45,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:19:45,838 INFO L225 Difference]: With dead ends: 4655 [2021-11-03 04:19:45,838 INFO L226 Difference]: Without dead ends: 2894 [2021-11-03 04:19:45,841 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 358 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:19:45,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2894 states. [2021-11-03 04:19:45,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2894 to 1842. [2021-11-03 04:19:46,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1842 states, 1841 states have (on average 1.5442694187941337) internal successors, (2843), 1841 states have internal predecessors, (2843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:19:46,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1842 states to 1842 states and 2843 transitions. [2021-11-03 04:19:46,009 INFO L78 Accepts]: Start accepts. Automaton has 1842 states and 2843 transitions. Word has length 182 [2021-11-03 04:19:46,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:19:46,009 INFO L470 AbstractCegarLoop]: Abstraction has 1842 states and 2843 transitions. [2021-11-03 04:19:46,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:19:46,010 INFO L276 IsEmpty]: Start isEmpty. Operand 1842 states and 2843 transitions. [2021-11-03 04:19:46,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-11-03 04:19:46,016 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:19:46,016 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-03 04:19:46,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-03 04:19:46,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:19:46,242 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:19:46,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:19:46,242 INFO L85 PathProgramCache]: Analyzing trace with hash 610130770, now seen corresponding path program 1 times [2021-11-03 04:19:46,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:19:46,243 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1685680867] [2021-11-03 04:19:46,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:19:46,244 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:19:46,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:19:46,244 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:19:46,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-03 04:19:48,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:19:48,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:19:48,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:19:49,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:19:49,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:19:49,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:19:49,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:19:49,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:19:49,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:19:49,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:19:49,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:19:49,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:19:49,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:19:49,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:19:49,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:19:49,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:19:49,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:19:49,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:19:49,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:19:49,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:19:49,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:19:49,633 INFO L354 Elim1Store]: treesize reduction 1132, result has 5.5 percent of original size [2021-11-03 04:19:49,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 76 [2021-11-03 04:19:50,314 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 04:19:50,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 109 treesize of output 37 [2021-11-03 04:19:50,605 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 201 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-03 04:19:50,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:19:51,197 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 201 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-03 04:19:51,198 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:19:51,198 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1685680867] [2021-11-03 04:19:51,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1685680867] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:19:51,198 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:19:51,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 04:19:51,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81849939] [2021-11-03 04:19:51,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:19:51,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:19:51,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:19:51,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:19:51,200 INFO L87 Difference]: Start difference. First operand 1842 states and 2843 transitions. Second operand has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:20:33,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:20:33,250 INFO L93 Difference]: Finished difference Result 4715 states and 7214 transitions. [2021-11-03 04:20:33,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:20:33,251 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 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 183 [2021-11-03 04:20:33,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:20:33,260 INFO L225 Difference]: With dead ends: 4715 [2021-11-03 04:20:33,260 INFO L226 Difference]: Without dead ends: 2894 [2021-11-03 04:20:33,262 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 360 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:20:33,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2894 states. [2021-11-03 04:20:33,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2894 to 1847. [2021-11-03 04:20:33,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1847 states, 1846 states have (on average 1.5227518959913326) internal successors, (2811), 1846 states have internal predecessors, (2811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:20:33,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1847 states to 1847 states and 2811 transitions. [2021-11-03 04:20:33,396 INFO L78 Accepts]: Start accepts. Automaton has 1847 states and 2811 transitions. Word has length 183 [2021-11-03 04:20:33,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:20:33,397 INFO L470 AbstractCegarLoop]: Abstraction has 1847 states and 2811 transitions. [2021-11-03 04:20:33,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:20:33,397 INFO L276 IsEmpty]: Start isEmpty. Operand 1847 states and 2811 transitions. [2021-11-03 04:20:33,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-11-03 04:20:33,403 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:20:33,403 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-03 04:20:33,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-03 04:20:33,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:20:33,618 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:20:33,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:20:33,618 INFO L85 PathProgramCache]: Analyzing trace with hash 944860177, now seen corresponding path program 1 times [2021-11-03 04:20:33,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:20:33,620 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1584739793] [2021-11-03 04:20:33,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:20:33,620 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:20:33,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:20:33,634 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:20:33,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-03 04:20:36,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:20:36,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:20:36,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:20:36,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:20:36,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:20:36,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:20:36,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:20:36,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:20:36,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:20:36,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:20:36,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:20:36,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:20:36,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:20:36,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:20:36,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:20:36,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:20:36,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:20:36,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:20:36,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:20:36,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:20:36,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:20:36,832 INFO L354 Elim1Store]: treesize reduction 1132, result has 5.5 percent of original size [2021-11-03 04:20:36,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 76 [2021-11-03 04:20:37,601 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 04:20:37,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 109 treesize of output 37 [2021-11-03 04:20:37,883 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 207 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-03 04:20:37,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:20:38,481 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 207 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-03 04:20:38,482 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:20:38,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1584739793] [2021-11-03 04:20:38,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1584739793] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:20:38,482 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:20:38,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 04:20:38,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781686667] [2021-11-03 04:20:38,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:20:38,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:20:38,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:20:38,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:20:38,484 INFO L87 Difference]: Start difference. First operand 1847 states and 2811 transitions. Second operand has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 6 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:21:15,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:21:15,749 INFO L93 Difference]: Finished difference Result 4720 states and 7136 transitions. [2021-11-03 04:21:15,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:21:15,750 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 6 states have internal predecessors, (140), 0 states have call successors, (0), 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 184 [2021-11-03 04:21:15,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:21:15,755 INFO L225 Difference]: With dead ends: 4720 [2021-11-03 04:21:15,755 INFO L226 Difference]: Without dead ends: 2894 [2021-11-03 04:21:15,757 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 362 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:21:15,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2894 states. [2021-11-03 04:21:15,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2894 to 1852. [2021-11-03 04:21:15,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1852 states, 1851 states have (on average 1.5013506212857914) internal successors, (2779), 1851 states have internal predecessors, (2779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:21:15,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1852 states to 1852 states and 2779 transitions. [2021-11-03 04:21:15,893 INFO L78 Accepts]: Start accepts. Automaton has 1852 states and 2779 transitions. Word has length 184 [2021-11-03 04:21:15,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:21:15,893 INFO L470 AbstractCegarLoop]: Abstraction has 1852 states and 2779 transitions. [2021-11-03 04:21:15,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 6 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:21:15,894 INFO L276 IsEmpty]: Start isEmpty. Operand 1852 states and 2779 transitions. [2021-11-03 04:21:15,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-11-03 04:21:15,899 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:21:15,899 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-03 04:21:15,925 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-11-03 04:21:16,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:21:16,123 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:21:16,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:21:16,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1165739315, now seen corresponding path program 1 times [2021-11-03 04:21:16,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:21:16,124 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1879388657] [2021-11-03 04:21:16,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:21:16,125 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:21:16,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:21:16,126 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:21:16,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-03 04:21:18,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:21:18,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:21:18,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:21:18,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:21:18,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:21:18,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:21:18,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:21:18,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:21:19,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:21:19,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:21:19,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:21:19,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:21:19,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:21:19,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:21:19,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:21:19,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:21:19,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:21:19,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:21:19,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:21:19,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:21:19,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:21:19,408 INFO L354 Elim1Store]: treesize reduction 1132, result has 5.5 percent of original size [2021-11-03 04:21:19,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 76 [2021-11-03 04:21:20,231 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 04:21:20,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 109 treesize of output 37 [2021-11-03 04:21:20,542 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 213 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-03 04:21:20,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:21:21,158 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 213 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-03 04:21:21,158 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:21:21,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1879388657] [2021-11-03 04:21:21,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1879388657] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:21:21,159 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:21:21,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 04:21:21,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580516667] [2021-11-03 04:21:21,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:21:21,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:21:21,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:21:21,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:21:21,160 INFO L87 Difference]: Start difference. First operand 1852 states and 2779 transitions. Second operand has 6 states, 6 states have (on average 23.666666666666668) internal successors, (142), 6 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:22:05,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:22:05,795 INFO L93 Difference]: Finished difference Result 4592 states and 6864 transitions. [2021-11-03 04:22:05,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:22:05,796 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.666666666666668) internal successors, (142), 6 states have internal predecessors, (142), 0 states have call successors, (0), 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 185 [2021-11-03 04:22:05,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:22:05,800 INFO L225 Difference]: With dead ends: 4592 [2021-11-03 04:22:05,801 INFO L226 Difference]: Without dead ends: 2761 [2021-11-03 04:22:05,803 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 364 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:22:05,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2761 states. [2021-11-03 04:22:05,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2761 to 1852. [2021-11-03 04:22:05,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1852 states, 1851 states have (on average 1.4786601836844948) internal successors, (2737), 1851 states have internal predecessors, (2737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:22:05,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1852 states to 1852 states and 2737 transitions. [2021-11-03 04:22:05,920 INFO L78 Accepts]: Start accepts. Automaton has 1852 states and 2737 transitions. Word has length 185 [2021-11-03 04:22:05,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:22:05,920 INFO L470 AbstractCegarLoop]: Abstraction has 1852 states and 2737 transitions. [2021-11-03 04:22:05,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.666666666666668) internal successors, (142), 6 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:22:05,920 INFO L276 IsEmpty]: Start isEmpty. Operand 1852 states and 2737 transitions. [2021-11-03 04:22:05,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-11-03 04:22:05,925 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:22:05,925 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 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] [2021-11-03 04:22:05,969 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-03 04:22:06,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:22:06,142 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:22:06,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:22:06,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1602969417, now seen corresponding path program 1 times [2021-11-03 04:22:06,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:22:06,143 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [687119555] [2021-11-03 04:22:06,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:22:06,144 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:22:06,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:22:06,144 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:22:06,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-03 04:22:08,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:22:08,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:22:08,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:22:08,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:22:08,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:22:08,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:22:08,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:22:08,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:22:08,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:22:08,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:22:08,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:22:08,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:22:08,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:22:08,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:22:08,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:22:08,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:22:08,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:22:08,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:22:08,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:22:08,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:22:08,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:22:09,203 INFO L354 Elim1Store]: treesize reduction 1132, result has 5.5 percent of original size [2021-11-03 04:22:09,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 76 [2021-11-03 04:22:10,115 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 04:22:10,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 109 treesize of output 37 [2021-11-03 04:22:10,413 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 232 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-03 04:22:10,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:22:11,091 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 232 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-03 04:22:11,092 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:22:11,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [687119555] [2021-11-03 04:22:11,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [687119555] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:22:11,092 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:22:11,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 04:22:11,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685479680] [2021-11-03 04:22:11,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:22:11,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:22:11,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:22:11,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:22:11,095 INFO L87 Difference]: Start difference. First operand 1852 states and 2737 transitions. Second operand has 6 states, 6 states have (on average 22.833333333333332) internal successors, (137), 6 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:22:43,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:22:43,188 INFO L93 Difference]: Finished difference Result 4769 states and 7034 transitions. [2021-11-03 04:22:43,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:22:43,190 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.833333333333332) internal successors, (137), 6 states have internal predecessors, (137), 0 states have call successors, (0), 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 192 [2021-11-03 04:22:43,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:22:43,194 INFO L225 Difference]: With dead ends: 4769 [2021-11-03 04:22:43,194 INFO L226 Difference]: Without dead ends: 2938 [2021-11-03 04:22:43,196 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:22:43,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2938 states. [2021-11-03 04:22:43,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2938 to 1948. [2021-11-03 04:22:43,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1948 states, 1947 states have (on average 1.4519774011299436) internal successors, (2827), 1947 states have internal predecessors, (2827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:22:43,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1948 states to 1948 states and 2827 transitions. [2021-11-03 04:22:43,318 INFO L78 Accepts]: Start accepts. Automaton has 1948 states and 2827 transitions. Word has length 192 [2021-11-03 04:22:43,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:22:43,318 INFO L470 AbstractCegarLoop]: Abstraction has 1948 states and 2827 transitions. [2021-11-03 04:22:43,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.833333333333332) internal successors, (137), 6 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:22:43,319 INFO L276 IsEmpty]: Start isEmpty. Operand 1948 states and 2827 transitions. [2021-11-03 04:22:43,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-11-03 04:22:43,323 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:22:43,324 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 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] [2021-11-03 04:22:43,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-03 04:22:43,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:22:43,538 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:22:43,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:22:43,538 INFO L85 PathProgramCache]: Analyzing trace with hash 358080211, now seen corresponding path program 1 times [2021-11-03 04:22:43,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:22:43,539 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1936901060] [2021-11-03 04:22:43,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:22:43,539 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:22:43,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:22:43,540 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:22:43,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-03 04:22:46,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:22:46,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:22:46,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:22:46,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:22:46,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:22:46,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:22:46,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:22:46,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:22:46,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:22:46,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:22:46,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:22:46,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:22:46,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:22:46,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:22:46,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:22:46,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:22:46,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:22:46,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:22:46,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:22:46,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:22:46,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:22:46,718 INFO L354 Elim1Store]: treesize reduction 1132, result has 5.5 percent of original size [2021-11-03 04:22:46,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 76 [2021-11-03 04:22:47,673 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 04:22:47,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 109 treesize of output 37 [2021-11-03 04:22:47,968 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 238 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-03 04:22:47,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:22:48,577 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 238 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-03 04:22:48,577 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:22:48,577 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1936901060] [2021-11-03 04:22:48,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1936901060] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:22:48,577 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:22:48,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 04:22:48,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560272260] [2021-11-03 04:22:48,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:22:48,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:22:48,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:22:48,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:22:48,579 INFO L87 Difference]: Start difference. First operand 1948 states and 2827 transitions. Second operand has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:23:23,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:23:23,332 INFO L93 Difference]: Finished difference Result 4945 states and 7188 transitions. [2021-11-03 04:23:23,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:23:23,333 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 0 states have call successors, (0), 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 193 [2021-11-03 04:23:23,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:23:23,339 INFO L225 Difference]: With dead ends: 4945 [2021-11-03 04:23:23,340 INFO L226 Difference]: Without dead ends: 3018 [2021-11-03 04:23:23,342 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 380 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:23:23,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3018 states. [2021-11-03 04:23:23,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3018 to 2050. [2021-11-03 04:23:23,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2050 states, 2049 states have (on average 1.4265495363591996) internal successors, (2923), 2049 states have internal predecessors, (2923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:23:23,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2050 states to 2050 states and 2923 transitions. [2021-11-03 04:23:23,552 INFO L78 Accepts]: Start accepts. Automaton has 2050 states and 2923 transitions. Word has length 193 [2021-11-03 04:23:23,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:23:23,552 INFO L470 AbstractCegarLoop]: Abstraction has 2050 states and 2923 transitions. [2021-11-03 04:23:23,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:23:23,553 INFO L276 IsEmpty]: Start isEmpty. Operand 2050 states and 2923 transitions. [2021-11-03 04:23:23,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-11-03 04:23:23,558 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:23:23,558 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 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] [2021-11-03 04:23:23,595 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-03 04:23:23,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:23:23,774 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:23:23,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:23:23,774 INFO L85 PathProgramCache]: Analyzing trace with hash -885263924, now seen corresponding path program 1 times [2021-11-03 04:23:23,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:23:23,775 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1002514634] [2021-11-03 04:23:23,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:23:23,776 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:23:23,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:23:23,776 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:23:23,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-03 04:23:26,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:23:26,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:23:26,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:23:26,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:23:26,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:23:26,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:23:26,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:23:26,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:23:26,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:23:26,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:23:26,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:23:26,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:23:26,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:23:26,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:23:26,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:23:26,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:23:26,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:23:26,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:23:26,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:23:26,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:23:26,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:23:27,183 INFO L354 Elim1Store]: treesize reduction 1132, result has 5.5 percent of original size [2021-11-03 04:23:27,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 76 [2021-11-03 04:23:29,416 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 04:23:29,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 109 treesize of output 37 [2021-11-03 04:23:29,707 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 277 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-11-03 04:23:29,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:23:30,416 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 277 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-11-03 04:23:30,417 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:23:30,417 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1002514634] [2021-11-03 04:23:30,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1002514634] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:23:30,417 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:23:30,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 04:23:30,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617370408] [2021-11-03 04:23:30,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:23:30,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:23:30,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:23:30,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:23:30,419 INFO L87 Difference]: Start difference. First operand 2050 states and 2923 transitions. Second operand has 6 states, 6 states have (on average 28.833333333333332) internal successors, (173), 6 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:24:08,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:24:08,644 INFO L93 Difference]: Finished difference Result 5062 states and 7253 transitions. [2021-11-03 04:24:08,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:24:08,647 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 28.833333333333332) internal successors, (173), 6 states have internal predecessors, (173), 0 states have call successors, (0), 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 200 [2021-11-03 04:24:08,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:24:08,652 INFO L225 Difference]: With dead ends: 5062 [2021-11-03 04:24:08,653 INFO L226 Difference]: Without dead ends: 3033 [2021-11-03 04:24:08,655 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 394 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:24:08,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3033 states. [2021-11-03 04:24:08,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3033 to 2209. [2021-11-03 04:24:08,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2209 states, 2208 states have (on average 1.4393115942028984) internal successors, (3178), 2208 states have internal predecessors, (3178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:24:08,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2209 states to 2209 states and 3178 transitions. [2021-11-03 04:24:08,854 INFO L78 Accepts]: Start accepts. Automaton has 2209 states and 3178 transitions. Word has length 200 [2021-11-03 04:24:08,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:24:08,854 INFO L470 AbstractCegarLoop]: Abstraction has 2209 states and 3178 transitions. [2021-11-03 04:24:08,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 28.833333333333332) internal successors, (173), 6 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:24:08,855 INFO L276 IsEmpty]: Start isEmpty. Operand 2209 states and 3178 transitions. [2021-11-03 04:24:08,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-11-03 04:24:08,858 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:24:08,858 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 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] [2021-11-03 04:24:08,888 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-03 04:24:09,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:24:09,074 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:24:09,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:24:09,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1051892435, now seen corresponding path program 1 times [2021-11-03 04:24:09,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:24:09,075 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1659494101] [2021-11-03 04:24:09,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:24:09,075 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:24:09,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:24:09,076 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:24:09,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-03 04:24:12,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:24:12,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:24:12,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:24:12,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:24:12,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:24:12,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:24:12,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:24:12,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:24:12,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:24:12,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:24:12,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:24:12,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:24:12,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:24:12,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:24:12,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:24:12,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:24:12,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:24:12,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:24:12,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:24:12,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:24:12,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:24:12,882 INFO L354 Elim1Store]: treesize reduction 1132, result has 5.5 percent of original size [2021-11-03 04:24:12,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 76 [2021-11-03 04:24:15,235 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 04:24:15,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 109 treesize of output 37 [2021-11-03 04:24:15,516 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 279 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-11-03 04:24:15,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:24:16,254 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 279 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-11-03 04:24:16,254 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:24:16,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1659494101] [2021-11-03 04:24:16,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1659494101] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:24:16,255 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:24:16,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 04:24:16,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108640619] [2021-11-03 04:24:16,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:24:16,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:24:16,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:24:16,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:24:16,257 INFO L87 Difference]: Start difference. First operand 2209 states and 3178 transitions. Second operand has 6 states, 6 states have (on average 29.166666666666668) internal successors, (175), 6 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:24:53,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:24:53,788 INFO L93 Difference]: Finished difference Result 5213 states and 7496 transitions. [2021-11-03 04:24:53,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:24:53,798 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 29.166666666666668) internal successors, (175), 6 states have internal predecessors, (175), 0 states have call successors, (0), 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 201 [2021-11-03 04:24:53,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:24:53,806 INFO L225 Difference]: With dead ends: 5213 [2021-11-03 04:24:53,806 INFO L226 Difference]: Without dead ends: 3025 [2021-11-03 04:24:53,808 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 396 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:24:53,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3025 states. [2021-11-03 04:24:54,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3025 to 2227. [2021-11-03 04:24:54,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2227 states, 2226 states have (on average 1.4411500449236299) internal successors, (3208), 2226 states have internal predecessors, (3208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:24:54,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2227 states to 2227 states and 3208 transitions. [2021-11-03 04:24:54,037 INFO L78 Accepts]: Start accepts. Automaton has 2227 states and 3208 transitions. Word has length 201 [2021-11-03 04:24:54,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:24:54,038 INFO L470 AbstractCegarLoop]: Abstraction has 2227 states and 3208 transitions. [2021-11-03 04:24:54,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 29.166666666666668) internal successors, (175), 6 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:24:54,038 INFO L276 IsEmpty]: Start isEmpty. Operand 2227 states and 3208 transitions. [2021-11-03 04:24:54,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-11-03 04:24:54,043 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:24:54,043 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-03 04:24:54,085 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-03 04:24:54,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:24:54,258 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:24:54,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:24:54,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1131468408, now seen corresponding path program 1 times [2021-11-03 04:24:54,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:24:54,259 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1024347837] [2021-11-03 04:24:54,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:24:54,260 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:24:54,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:24:54,261 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:24:54,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b458b20d-8520-4e8c-a802-ab8cd5482c17/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-03 04:24:57,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:24:57,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:24:57,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:24:57,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:24:57,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:24:57,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:24:57,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:24:57,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:24:57,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:24:57,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:24:57,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:24:57,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:24:57,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:24:57,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:24:57,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:24:57,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:24:57,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:24:57,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:24:57,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:24:57,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:24:57,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:24:58,367 INFO L354 Elim1Store]: treesize reduction 1132, result has 5.5 percent of original size [2021-11-03 04:24:58,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 76 [2021-11-03 04:25:00,170 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 04:25:00,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 109 treesize of output 37 [2021-11-03 04:25:00,482 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 281 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-11-03 04:25:00,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:25:01,314 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 281 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-11-03 04:25:01,314 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:25:01,314 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1024347837] [2021-11-03 04:25:01,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1024347837] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:25:01,315 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:25:01,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 04:25:01,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117355685] [2021-11-03 04:25:01,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:25:01,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:25:01,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:25:01,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:25:01,318 INFO L87 Difference]: Start difference. First operand 2227 states and 3208 transitions. Second operand has 6 states, 6 states have (on average 26.833333333333332) internal successors, (161), 6 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)