./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/openssl/s3_srvr.blast.11.i.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.11.i.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs --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 d2558e20908ca51bd715f698f032e0721784debd5f3c1dc69de7f261de8133a0 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 13:19:05,955 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 13:19:05,958 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 13:19:06,000 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 13:19:06,001 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 13:19:06,002 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 13:19:06,004 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 13:19:06,007 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 13:19:06,010 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 13:19:06,011 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 13:19:06,012 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 13:19:06,015 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 13:19:06,017 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 13:19:06,021 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 13:19:06,024 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 13:19:06,029 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 13:19:06,032 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 13:19:06,037 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 13:19:06,040 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 13:19:06,042 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 13:19:06,044 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 13:19:06,046 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 13:19:06,048 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 13:19:06,049 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 13:19:06,053 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 13:19:06,054 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 13:19:06,054 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 13:19:06,055 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 13:19:06,056 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 13:19:06,057 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 13:19:06,058 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 13:19:06,059 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 13:19:06,060 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 13:19:06,062 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 13:19:06,063 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 13:19:06,064 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 13:19:06,065 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 13:19:06,065 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 13:19:06,066 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 13:19:06,068 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 13:19:06,069 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 13:19:06,070 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 13:19:06,113 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 13:19:06,113 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 13:19:06,115 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 13:19:06,115 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 13:19:06,115 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 13:19:06,116 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 13:19:06,116 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 13:19:06,116 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 13:19:06,116 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 13:19:06,116 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 13:19:06,118 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 13:19:06,118 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 13:19:06,118 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 13:19:06,118 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 13:19:06,119 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 13:19:06,119 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 13:19:06,120 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 13:19:06,120 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 13:19:06,120 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 13:19:06,120 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 13:19:06,121 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 13:19:06,121 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 13:19:06,121 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 13:19:06,121 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 13:19:06,121 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 13:19:06,122 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 13:19:06,122 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 13:19:06,122 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 13:19:06,122 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 13:19:06,124 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 13:19:06,124 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 13:19:06,125 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:19:06,125 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 13:19:06,125 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 13:19:06,125 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 13:19:06,126 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 13:19:06,126 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 13:19:06,126 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 13:19:06,126 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 13:19:06,126 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 13:19:06,127 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_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d2558e20908ca51bd715f698f032e0721784debd5f3c1dc69de7f261de8133a0 [2021-11-19 13:19:06,494 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 13:19:06,522 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 13:19:06,525 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 13:19:06,527 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 13:19:06,528 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 13:19:06,530 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/openssl/s3_srvr.blast.11.i.cil-2.c [2021-11-19 13:19:06,628 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/data/05a1214e5/5ed313ecffea4472ae895d476b7d2f1c/FLAG5ce52cd85 [2021-11-19 13:19:07,355 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 13:19:07,356 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/sv-benchmarks/c/openssl/s3_srvr.blast.11.i.cil-2.c [2021-11-19 13:19:07,379 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/data/05a1214e5/5ed313ecffea4472ae895d476b7d2f1c/FLAG5ce52cd85 [2021-11-19 13:19:07,491 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/data/05a1214e5/5ed313ecffea4472ae895d476b7d2f1c [2021-11-19 13:19:07,495 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 13:19:07,499 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 13:19:07,504 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 13:19:07,505 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 13:19:07,509 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 13:19:07,510 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:19:07" (1/1) ... [2021-11-19 13:19:07,513 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3282d2c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:19:07, skipping insertion in model container [2021-11-19 13:19:07,513 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:19:07" (1/1) ... [2021-11-19 13:19:07,523 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 13:19:07,642 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:19:08,236 WARN L230 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_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/sv-benchmarks/c/openssl/s3_srvr.blast.11.i.cil-2.c[74369,74382] [2021-11-19 13:19:08,250 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:19:08,279 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) [2021-11-19 13:19:08,280 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@728f4d5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:19:08, skipping insertion in model container [2021-11-19 13:19:08,280 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 13:19:08,280 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 13:19:08,284 INFO L158 Benchmark]: Toolchain (without parser) took 782.25ms. Allocated memory is still 109.1MB. Free memory was 63.8MB in the beginning and 71.7MB in the end (delta: -7.9MB). Peak memory consumption was 7.0MB. Max. memory is 16.1GB. [2021-11-19 13:19:08,285 INFO L158 Benchmark]: CDTParser took 0.35ms. Allocated memory is still 109.1MB. Free memory is still 82.8MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 13:19:08,286 INFO L158 Benchmark]: CACSL2BoogieTranslator took 776.67ms. Allocated memory is still 109.1MB. Free memory was 63.5MB in the beginning and 71.7MB in the end (delta: -8.2MB). Peak memory consumption was 4.9MB. Max. memory is 16.1GB. [2021-11-19 13:19:08,288 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35ms. Allocated memory is still 109.1MB. Free memory is still 82.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 776.67ms. Allocated memory is still 109.1MB. Free memory was 63.5MB in the beginning and 71.7MB in the end (delta: -8.2MB). Peak memory consumption was 4.9MB. Max. memory is 16.1GB. * 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_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.11.i.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs --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 d2558e20908ca51bd715f698f032e0721784debd5f3c1dc69de7f261de8133a0 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 13:19:10,936 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 13:19:10,939 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 13:19:10,993 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 13:19:10,994 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 13:19:10,996 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 13:19:10,998 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 13:19:11,002 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 13:19:11,004 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 13:19:11,006 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 13:19:11,008 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 13:19:11,010 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 13:19:11,010 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 13:19:11,012 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 13:19:11,014 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 13:19:11,016 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 13:19:11,017 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 13:19:11,019 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 13:19:11,022 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 13:19:11,025 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 13:19:11,028 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 13:19:11,029 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 13:19:11,031 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 13:19:11,033 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 13:19:11,037 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 13:19:11,038 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 13:19:11,039 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 13:19:11,040 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 13:19:11,041 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 13:19:11,042 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 13:19:11,043 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 13:19:11,044 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 13:19:11,045 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 13:19:11,047 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 13:19:11,048 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 13:19:11,049 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 13:19:11,050 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 13:19:11,050 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 13:19:11,051 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 13:19:11,052 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 13:19:11,053 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 13:19:11,055 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-19 13:19:11,085 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 13:19:11,086 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 13:19:11,087 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 13:19:11,087 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 13:19:11,087 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 13:19:11,088 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 13:19:11,088 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 13:19:11,088 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 13:19:11,089 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 13:19:11,089 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 13:19:11,090 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 13:19:11,090 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 13:19:11,090 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 13:19:11,091 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 13:19:11,091 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 13:19:11,091 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 13:19:11,091 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 13:19:11,092 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 13:19:11,092 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 13:19:11,092 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 13:19:11,093 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 13:19:11,093 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 13:19:11,093 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 13:19:11,093 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 13:19:11,094 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 13:19:11,094 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 13:19:11,094 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 13:19:11,095 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:19:11,095 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 13:19:11,095 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 13:19:11,096 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 13:19:11,096 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 13:19:11,098 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 13:19:11,099 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 13:19:11,099 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 13:19:11,099 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 13:19:11,100 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_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d2558e20908ca51bd715f698f032e0721784debd5f3c1dc69de7f261de8133a0 [2021-11-19 13:19:11,539 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 13:19:11,573 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 13:19:11,576 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 13:19:11,579 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 13:19:11,582 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 13:19:11,584 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/openssl/s3_srvr.blast.11.i.cil-2.c [2021-11-19 13:19:11,677 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/data/3d197a3b7/dfede9a878304606a414ea2515071ce2/FLAG1b51df963 [2021-11-19 13:19:12,496 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 13:19:12,499 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/sv-benchmarks/c/openssl/s3_srvr.blast.11.i.cil-2.c [2021-11-19 13:19:12,534 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/data/3d197a3b7/dfede9a878304606a414ea2515071ce2/FLAG1b51df963 [2021-11-19 13:19:12,655 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/data/3d197a3b7/dfede9a878304606a414ea2515071ce2 [2021-11-19 13:19:12,660 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 13:19:12,662 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 13:19:12,664 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 13:19:12,665 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 13:19:12,669 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 13:19:12,670 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:19:12" (1/1) ... [2021-11-19 13:19:12,672 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@644ee8e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:19:12, skipping insertion in model container [2021-11-19 13:19:12,673 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:19:12" (1/1) ... [2021-11-19 13:19:12,682 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 13:19:12,757 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:19:13,279 WARN L230 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_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/sv-benchmarks/c/openssl/s3_srvr.blast.11.i.cil-2.c[74369,74382] [2021-11-19 13:19:13,290 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:19:13,314 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 13:19:13,329 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:19:13,444 WARN L230 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_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/sv-benchmarks/c/openssl/s3_srvr.blast.11.i.cil-2.c[74369,74382] [2021-11-19 13:19:13,454 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:19:13,464 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 13:19:13,687 WARN L230 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_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/sv-benchmarks/c/openssl/s3_srvr.blast.11.i.cil-2.c[74369,74382] [2021-11-19 13:19:13,689 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:19:13,716 INFO L208 MainTranslator]: Completed translation [2021-11-19 13:19:13,717 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:19:13 WrapperNode [2021-11-19 13:19:13,717 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 13:19:13,718 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 13:19:13,718 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 13:19:13,719 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 13:19:13,727 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:19:13" (1/1) ... [2021-11-19 13:19:13,758 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:19:13" (1/1) ... [2021-11-19 13:19:13,831 INFO L137 Inliner]: procedures = 36, calls = 223, calls flagged for inlining = 7, calls inlined = 3, statements flattened = 761 [2021-11-19 13:19:13,840 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 13:19:13,842 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 13:19:13,842 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 13:19:13,843 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 13:19:13,853 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:19:13" (1/1) ... [2021-11-19 13:19:13,853 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:19:13" (1/1) ... [2021-11-19 13:19:13,885 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:19:13" (1/1) ... [2021-11-19 13:19:13,891 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:19:13" (1/1) ... [2021-11-19 13:19:13,953 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:19:13" (1/1) ... [2021-11-19 13:19:13,963 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:19:13" (1/1) ... [2021-11-19 13:19:13,979 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:19:13" (1/1) ... [2021-11-19 13:19:13,989 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 13:19:13,990 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 13:19:13,991 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 13:19:13,991 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 13:19:13,992 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:19:13" (1/1) ... [2021-11-19 13:19:13,999 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:19:14,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:19:14,030 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 13:19:14,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 13:19:14,102 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 13:19:14,102 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 13:19:14,103 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-19 13:19:14,103 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 13:19:14,103 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-19 13:19:14,103 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-19 13:19:14,103 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-19 13:19:14,104 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 13:19:14,104 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 13:19:14,104 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-19 13:19:14,340 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 13:19:14,347 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 13:19:14,381 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-19 13:19:23,933 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-11-19 13:19:23,933 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-11-19 13:19:23,933 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 13:19:23,944 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 13:19:23,944 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 13:19:23,947 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:19:23 BoogieIcfgContainer [2021-11-19 13:19:23,947 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 13:19:23,949 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 13:19:23,950 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 13:19:23,953 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 13:19:23,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 01:19:12" (1/3) ... [2021-11-19 13:19:23,954 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fdba9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:19:23, skipping insertion in model container [2021-11-19 13:19:23,955 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:19:13" (2/3) ... [2021-11-19 13:19:23,955 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fdba9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:19:23, skipping insertion in model container [2021-11-19 13:19:23,955 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:19:23" (3/3) ... [2021-11-19 13:19:23,957 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.11.i.cil-2.c [2021-11-19 13:19:23,964 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 13:19:23,964 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 13:19:24,021 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 13:19:24,029 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 [2021-11-19 13:19:24,029 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 13:19:24,051 INFO L276 IsEmpty]: Start isEmpty. Operand has 150 states, 148 states have (on average 1.7162162162162162) internal successors, (254), 149 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:19:24,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-19 13:19:24,061 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:19:24,062 INFO L514 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] [2021-11-19 13:19:24,063 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:19:24,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:19:24,070 INFO L85 PathProgramCache]: Analyzing trace with hash -442385417, now seen corresponding path program 1 times [2021-11-19 13:19:24,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:19:24,088 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1191717487] [2021-11-19 13:19:24,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:19:24,089 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:19:24,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:19:24,093 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:19:24,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 13:19:24,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:19:24,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 13:19:24,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:19:24,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:19:24,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:19:25,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:19:25,014 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:19:25,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1191717487] [2021-11-19 13:19:25,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1191717487] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:19:25,015 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:19:25,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-19 13:19:25,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007761962] [2021-11-19 13:19:25,018 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:19:25,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:19:25,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:19:25,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:19:25,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:19:25,079 INFO L87 Difference]: Start difference. First operand has 150 states, 148 states have (on average 1.7162162162162162) internal successors, (254), 149 states have internal predecessors, (254), 0 states have call successors, (0), 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 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:19:25,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:19:25,354 INFO L93 Difference]: Finished difference Result 566 states and 965 transitions. [2021-11-19 13:19:25,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:19:25,357 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-19 13:19:25,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:19:25,373 INFO L225 Difference]: With dead ends: 566 [2021-11-19 13:19:25,373 INFO L226 Difference]: Without dead ends: 387 [2021-11-19 13:19:25,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:19:25,382 INFO L933 BasicCegarLoop]: 232 mSDtfsCounter, 402 mSDsluCounter, 438 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 670 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:19:25,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [402 Valid, 670 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:19:25,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-11-19 13:19:25,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 385. [2021-11-19 13:19:25,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 1.5286458333333333) internal successors, (587), 384 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:19:25,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 587 transitions. [2021-11-19 13:19:25,455 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 587 transitions. Word has length 37 [2021-11-19 13:19:25,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:19:25,455 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 587 transitions. [2021-11-19 13:19:25,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:19:25,456 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 587 transitions. [2021-11-19 13:19:25,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-19 13:19:25,460 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:19:25,460 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-11-19 13:19:25,483 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 13:19:25,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:19:25,683 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:19:25,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:19:25,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1287801256, now seen corresponding path program 1 times [2021-11-19 13:19:25,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:19:25,686 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [106199544] [2021-11-19 13:19:25,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:19:25,686 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:19:25,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:19:25,687 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:19:25,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 13:19:25,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:19:25,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 13:19:25,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:19:26,221 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:19:26,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:19:26,507 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:19:26,507 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:19:26,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [106199544] [2021-11-19 13:19:26,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [106199544] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:19:26,508 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:19:26,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-19 13:19:26,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104717044] [2021-11-19 13:19:26,509 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:19:26,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:19:26,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:19:26,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:19:26,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:19:26,527 INFO L87 Difference]: Start difference. First operand 385 states and 587 transitions. Second operand has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:19:27,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:19:27,372 INFO L93 Difference]: Finished difference Result 884 states and 1359 transitions. [2021-11-19 13:19:27,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:19:27,373 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 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 61 [2021-11-19 13:19:27,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:19:27,379 INFO L225 Difference]: With dead ends: 884 [2021-11-19 13:19:27,380 INFO L226 Difference]: Without dead ends: 633 [2021-11-19 13:19:27,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:19:27,383 INFO L933 BasicCegarLoop]: 361 mSDtfsCounter, 302 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 730 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 13:19:27,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 730 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 13:19:27,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2021-11-19 13:19:27,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 631. [2021-11-19 13:19:27,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 631 states, 630 states have (on average 1.5206349206349206) internal successors, (958), 630 states have internal predecessors, (958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:19:27,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 631 states to 631 states and 958 transitions. [2021-11-19 13:19:27,426 INFO L78 Accepts]: Start accepts. Automaton has 631 states and 958 transitions. Word has length 61 [2021-11-19 13:19:27,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:19:27,427 INFO L470 AbstractCegarLoop]: Abstraction has 631 states and 958 transitions. [2021-11-19 13:19:27,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:19:27,427 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states and 958 transitions. [2021-11-19 13:19:27,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-19 13:19:27,438 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:19:27,438 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1] [2021-11-19 13:19:27,457 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 13:19:27,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:19:27,653 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:19:27,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:19:27,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1861684425, now seen corresponding path program 1 times [2021-11-19 13:19:27,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:19:27,657 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [674836639] [2021-11-19 13:19:27,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:19:27,657 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:19:27,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:19:27,659 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:19:27,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 13:19:27,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:19:28,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 13:19:28,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:19:28,409 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 13:19:28,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:19:28,852 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 13:19:28,853 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:19:28,856 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [674836639] [2021-11-19 13:19:28,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [674836639] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:19:28,860 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:19:28,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-19 13:19:28,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563752200] [2021-11-19 13:19:28,863 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:19:28,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:19:28,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:19:28,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:19:28,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:19:28,869 INFO L87 Difference]: Start difference. First operand 631 states and 958 transitions. Second operand has 4 states, 4 states have (on average 37.25) internal successors, (149), 4 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:19:29,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:19:29,841 INFO L93 Difference]: Finished difference Result 1372 states and 2097 transitions. [2021-11-19 13:19:29,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:19:29,842 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.25) internal successors, (149), 4 states have internal predecessors, (149), 0 states have call successors, (0), 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 117 [2021-11-19 13:19:29,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:19:29,850 INFO L225 Difference]: With dead ends: 1372 [2021-11-19 13:19:29,850 INFO L226 Difference]: Without dead ends: 875 [2021-11-19 13:19:29,851 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:19:29,852 INFO L933 BasicCegarLoop]: 363 mSDtfsCounter, 297 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 727 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 13:19:29,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [297 Valid, 727 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 13:19:29,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 875 states. [2021-11-19 13:19:29,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 875 to 875. [2021-11-19 13:19:29,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 875 states, 874 states have (on average 1.5183066361556063) internal successors, (1327), 874 states have internal predecessors, (1327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:19:29,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 1327 transitions. [2021-11-19 13:19:29,898 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 1327 transitions. Word has length 117 [2021-11-19 13:19:29,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:19:29,899 INFO L470 AbstractCegarLoop]: Abstraction has 875 states and 1327 transitions. [2021-11-19 13:19:29,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.25) internal successors, (149), 4 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:19:29,899 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 1327 transitions. [2021-11-19 13:19:29,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-19 13:19:29,903 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:19:29,903 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2021-11-19 13:19:29,923 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 13:19:30,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:19:30,117 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:19:30,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:19:30,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1505494372, now seen corresponding path program 1 times [2021-11-19 13:19:30,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:19:30,120 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1122022844] [2021-11-19 13:19:30,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:19:30,120 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:19:30,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:19:30,121 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:19:30,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 13:19:30,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:19:30,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 13:19:30,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:19:31,043 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-19 13:19:31,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:19:31,505 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-19 13:19:31,505 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:19:31,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1122022844] [2021-11-19 13:19:31,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1122022844] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:19:31,505 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:19:31,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-19 13:19:31,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824873563] [2021-11-19 13:19:31,506 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:19:31,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:19:31,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:19:31,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:19:31,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:19:31,508 INFO L87 Difference]: Start difference. First operand 875 states and 1327 transitions. Second operand has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:19:32,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:19:32,605 INFO L93 Difference]: Finished difference Result 1860 states and 2833 transitions. [2021-11-19 13:19:32,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:19:32,606 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 0 states have call successors, (0), 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 146 [2021-11-19 13:19:32,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:19:32,615 INFO L225 Difference]: With dead ends: 1860 [2021-11-19 13:19:32,616 INFO L226 Difference]: Without dead ends: 1119 [2021-11-19 13:19:32,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 288 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:19:32,619 INFO L933 BasicCegarLoop]: 365 mSDtfsCounter, 306 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 725 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:19:32,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [306 Valid, 725 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-19 13:19:32,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2021-11-19 13:19:32,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 1119. [2021-11-19 13:19:32,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 1.5143112701252237) internal successors, (1693), 1118 states have internal predecessors, (1693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:19:32,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 1693 transitions. [2021-11-19 13:19:32,698 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 1693 transitions. Word has length 146 [2021-11-19 13:19:32,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:19:32,699 INFO L470 AbstractCegarLoop]: Abstraction has 1119 states and 1693 transitions. [2021-11-19 13:19:32,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:19:32,699 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 1693 transitions. [2021-11-19 13:19:32,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-11-19 13:19:32,704 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:19:32,711 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:19:32,730 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 13:19:32,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:19:32,931 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:19:32,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:19:32,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1562257391, now seen corresponding path program 1 times [2021-11-19 13:19:32,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:19:32,933 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [267225] [2021-11-19 13:19:32,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:19:32,934 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:19:32,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:19:32,935 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:19:32,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 13:19:33,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:19:33,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-19 13:19:33,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:19:33,846 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 [2021-11-19 13:19:33,864 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 [2021-11-19 13:19:33,964 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:19:33,968 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 221 [2021-11-19 13:19:34,003 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 221 treesize of output 210 [2021-11-19 13:19:34,549 INFO L354 Elim1Store]: treesize reduction 1607, result has 2.8 percent of original size [2021-11-19 13:19:34,550 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 601 treesize of output 573 [2021-11-19 13:19:34,648 INFO L354 Elim1Store]: treesize reduction 340, result has 2.6 percent of original size [2021-11-19 13:19:34,649 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 [2021-11-19 13:19:34,660 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:19:34,662 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 221 [2021-11-19 13:19:34,672 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:19:34,674 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 336 [2021-11-19 13:19:34,686 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 336 treesize of output 319 [2021-11-19 13:19:34,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:19:34,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:19:34,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:19:34,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:19:34,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:19:34,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:19:34,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:19:34,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:19:34,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:19:34,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:19:34,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:19:34,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:19:34,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:19:34,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:19:34,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:19:34,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:19:34,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:19:34,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:19:34,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:19:34,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:19:34,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:19:34,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:19:34,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:19:34,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:19:34,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:19:34,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:19:34,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:19:34,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:19:34,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:19:34,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:19:34,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:19:34,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:19:34,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:19:34,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:19:34,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:19:34,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:19:34,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:19:34,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:19:34,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:19:34,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:19:34,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:19:34,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:19:34,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:19:34,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:19:34,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:19:34,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:19:34,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:19:34,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:19:34,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:19:34,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:19:34,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:19:34,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:19:34,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:19:34,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:19:34,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:19:34,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:19:34,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:19:34,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:19:34,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:19:34,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:19:34,843 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 97 treesize of output 49 [2021-11-19 13:19:34,965 INFO L354 Elim1Store]: treesize reduction 340, result has 2.6 percent of original size [2021-11-19 13:19:34,966 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 [2021-11-19 13:19:34,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:19:34,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:19:34,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:19:34,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:19:34,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:19:34,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:19:34,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:19:34,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:19:34,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:19:34,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:19:34,995 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 [2021-11-19 13:19:35,028 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 [2021-11-19 13:19:35,032 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 [2021-11-19 13:19:35,483 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-19 13:19:35,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:19:36,073 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:19:36,080 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 181 [2021-11-19 13:19:36,087 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:19:36,096 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 238 [2021-11-19 13:19:36,273 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:19:36,275 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 393 [2021-11-19 13:19:36,297 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:19:36,299 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 510 [2021-11-19 13:19:36,313 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:19:36,316 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 687 [2021-11-19 13:19:36,337 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:19:36,343 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 744 [2021-11-19 13:19:36,370 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:19:36,375 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 861 [2021-11-19 13:19:36,413 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:19:36,420 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1038 [2021-11-19 13:19:37,110 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-19 13:19:37,111 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:19:37,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [267225] [2021-11-19 13:19:37,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [267225] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:19:37,112 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:19:37,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-19 13:19:37,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331912619] [2021-11-19 13:19:37,113 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:19:37,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 13:19:37,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:19:37,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 13:19:37,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-19 13:19:37,118 INFO L87 Difference]: Start difference. First operand 1119 states and 1693 transitions. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:19:39,151 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:19:41,166 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:19:50,224 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:19:51,245 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:19:54,206 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:19:54,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:19:54,952 INFO L93 Difference]: Finished difference Result 2235 states and 3382 transitions. [2021-11-19 13:19:54,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 13:19:54,954 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-11-19 13:19:54,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:19:54,961 INFO L225 Difference]: With dead ends: 2235 [2021-11-19 13:19:54,961 INFO L226 Difference]: Without dead ends: 1119 [2021-11-19 13:19:54,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 331 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-19 13:19:54,964 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 12 mSDsluCounter, 616 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 822 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 17.7s IncrementalHoareTripleChecker+Time [2021-11-19 13:19:54,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 822 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 166 Invalid, 2 Unknown, 59 Unchecked, 17.7s Time] [2021-11-19 13:19:54,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2021-11-19 13:19:55,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 1119. [2021-11-19 13:19:55,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 1.513416815742397) internal successors, (1692), 1118 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:19:55,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 1692 transitions. [2021-11-19 13:19:55,009 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 1692 transitions. Word has length 170 [2021-11-19 13:19:55,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:19:55,009 INFO L470 AbstractCegarLoop]: Abstraction has 1119 states and 1692 transitions. [2021-11-19 13:19:55,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:19:55,010 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 1692 transitions. [2021-11-19 13:19:55,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-11-19 13:19:55,013 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:19:55,014 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:19:55,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 13:19:55,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:19:55,228 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:19:55,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:19:55,229 INFO L85 PathProgramCache]: Analyzing trace with hash 872425901, now seen corresponding path program 1 times [2021-11-19 13:19:55,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:19:55,230 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1528047107] [2021-11-19 13:19:55,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:19:55,230 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:19:55,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:19:55,231 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:19:55,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 13:19:56,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:19:56,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 13:19:56,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:19:56,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:19:56,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:19:56,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:19:56,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:19:56,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:19:56,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:19:56,482 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-19 13:19:56,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-19 13:19:56,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:19:56,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:19:56,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:19:57,010 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-19 13:19:57,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-19 13:19:58,543 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 13:19:58,544 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 110 treesize of output 38 [2021-11-19 13:19:58,847 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 169 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-11-19 13:19:58,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:19:59,487 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 169 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-11-19 13:19:59,487 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:19:59,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1528047107] [2021-11-19 13:19:59,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1528047107] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:19:59,488 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:19:59,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-19 13:19:59,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855751254] [2021-11-19 13:19:59,489 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:19:59,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 13:19:59,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:19:59,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 13:19:59,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-19 13:19:59,490 INFO L87 Difference]: Start difference. First operand 1119 states and 1692 transitions. Second operand has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 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) [2021-11-19 13:20:01,512 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:20:03,522 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:20:07,316 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:20:15,808 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:20:21,217 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:20:23,247 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:20:26,405 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:20:28,106 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:20:35,801 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:20:37,370 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:20:40,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:20:40,084 INFO L93 Difference]: Finished difference Result 4218 states and 6404 transitions. [2021-11-19 13:20:40,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 13:20:40,086 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 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 170 [2021-11-19 13:20:40,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:20:40,104 INFO L225 Difference]: With dead ends: 4218 [2021-11-19 13:20:40,105 INFO L226 Difference]: Without dead ends: 3109 [2021-11-19 13:20:40,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 332 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-19 13:20:40,108 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 377 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 86 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 39.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 40.3s IncrementalHoareTripleChecker+Time [2021-11-19 13:20:40,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [377 Valid, 600 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 553 Invalid, 3 Unknown, 0 Unchecked, 40.3s Time] [2021-11-19 13:20:40,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3109 states. [2021-11-19 13:20:40,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3109 to 1343. [2021-11-19 13:20:40,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1343 states, 1342 states have (on average 1.548435171385991) internal successors, (2078), 1342 states have internal predecessors, (2078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:20:40,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1343 states to 1343 states and 2078 transitions. [2021-11-19 13:20:40,211 INFO L78 Accepts]: Start accepts. Automaton has 1343 states and 2078 transitions. Word has length 170 [2021-11-19 13:20:40,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:20:40,212 INFO L470 AbstractCegarLoop]: Abstraction has 1343 states and 2078 transitions. [2021-11-19 13:20:40,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 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) [2021-11-19 13:20:40,212 INFO L276 IsEmpty]: Start isEmpty. Operand 1343 states and 2078 transitions. [2021-11-19 13:20:40,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-11-19 13:20:40,216 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:20:40,217 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:20:40,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 13:20:40,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:20:40,437 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:20:40,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:20:40,438 INFO L85 PathProgramCache]: Analyzing trace with hash 437920303, now seen corresponding path program 1 times [2021-11-19 13:20:40,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:20:40,439 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2057240468] [2021-11-19 13:20:40,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:20:40,439 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:20:40,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:20:40,440 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:20:40,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 13:20:41,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:20:41,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:20:41,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:20:41,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:41,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:41,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:41,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:41,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:41,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:41,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:41,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:41,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:41,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:41,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:41,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:41,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:20:41,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:20:41,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:20:41,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:20:41,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:20:41,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:20:41,660 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-19 13:20:41,660 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 74 [2021-11-19 13:20:43,123 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 13:20:43,123 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 107 treesize of output 35 [2021-11-19 13:20:43,285 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 159 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-19 13:20:43,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:20:43,820 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 159 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-19 13:20:43,821 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:20:43,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2057240468] [2021-11-19 13:20:43,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2057240468] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:20:43,821 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:20:43,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-19 13:20:43,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283019334] [2021-11-19 13:20:43,821 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:20:43,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:20:43,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:20:43,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:20:43,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 13:20:43,822 INFO L87 Difference]: Start difference. First operand 1343 states and 2078 transitions. Second operand has 5 states, 5 states have (on average 29.8) internal successors, (149), 5 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:20:45,844 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:20:52,503 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:20:55,193 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:20:57,449 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:21:03,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:21:03,999 INFO L93 Difference]: Finished difference Result 3248 states and 5026 transitions. [2021-11-19 13:21:04,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:21:04,006 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.8) internal successors, (149), 5 states have internal predecessors, (149), 0 states have call successors, (0), 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 170 [2021-11-19 13:21:04,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:21:04,020 INFO L225 Difference]: With dead ends: 3248 [2021-11-19 13:21:04,020 INFO L226 Difference]: Without dead ends: 1915 [2021-11-19 13:21:04,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 334 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:21:04,023 INFO L933 BasicCegarLoop]: 255 mSDtfsCounter, 110 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 18 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:21:04,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 615 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 221 Invalid, 1 Unknown, 0 Unchecked, 20.0s Time] [2021-11-19 13:21:04,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1915 states. [2021-11-19 13:21:04,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1915 to 1595. [2021-11-19 13:21:04,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1595 states, 1594 states have (on average 1.5803011292346298) internal successors, (2519), 1594 states have internal predecessors, (2519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:21:04,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1595 states to 1595 states and 2519 transitions. [2021-11-19 13:21:04,131 INFO L78 Accepts]: Start accepts. Automaton has 1595 states and 2519 transitions. Word has length 170 [2021-11-19 13:21:04,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:21:04,133 INFO L470 AbstractCegarLoop]: Abstraction has 1595 states and 2519 transitions. [2021-11-19 13:21:04,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.8) internal successors, (149), 5 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:21:04,133 INFO L276 IsEmpty]: Start isEmpty. Operand 1595 states and 2519 transitions. [2021-11-19 13:21:04,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-11-19 13:21:04,139 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:21:04,139 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:21:04,169 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-19 13:21:04,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:21:04,352 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:21:04,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:21:04,353 INFO L85 PathProgramCache]: Analyzing trace with hash 2089364194, now seen corresponding path program 1 times [2021-11-19 13:21:04,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:21:04,354 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [599416362] [2021-11-19 13:21:04,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:21:04,355 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:21:04,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:21:04,355 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:21:04,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 13:21:05,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:21:05,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:21:05,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:21:05,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:21:05,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:21:05,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:21:05,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:21:05,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:21:05,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:21:05,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:21:05,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:21:05,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:21:05,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:21:05,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:21:05,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:21:05,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:21:05,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:21:05,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:21:05,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:21:05,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:21:05,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:21:05,854 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-19 13:21:05,854 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 74 [2021-11-19 13:21:06,553 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 13:21:06,554 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 107 treesize of output 35 [2021-11-19 13:21:06,765 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 199 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 13:21:06,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:21:07,271 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 199 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 13:21:07,271 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:21:07,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [599416362] [2021-11-19 13:21:07,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [599416362] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:21:07,271 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:21:07,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 13:21:07,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922642902] [2021-11-19 13:21:07,272 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:21:07,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 13:21:07,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:21:07,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 13:21:07,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:21:07,274 INFO L87 Difference]: Start difference. First operand 1595 states and 2519 transitions. Second operand has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:21:09,304 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:21:13,894 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:21:20,993 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:21:23,006 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:21:24,626 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:21:28,128 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:21:30,584 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:21:35,136 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:21:36,622 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:21:39,503 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:21:46,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:21:46,127 INFO L93 Difference]: Finished difference Result 4734 states and 7391 transitions. [2021-11-19 13:21:46,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 13:21:46,134 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 0 states have call successors, (0), 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 [2021-11-19 13:21:46,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:21:46,154 INFO L225 Difference]: With dead ends: 4734 [2021-11-19 13:21:46,154 INFO L226 Difference]: Without dead ends: 3149 [2021-11-19 13:21:46,157 INFO L932 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 [2021-11-19 13:21:46,158 INFO L933 BasicCegarLoop]: 174 mSDtfsCounter, 214 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 67 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 37.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 38.6s IncrementalHoareTripleChecker+Time [2021-11-19 13:21:46,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 567 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 480 Invalid, 3 Unknown, 0 Unchecked, 38.6s Time] [2021-11-19 13:21:46,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3149 states. [2021-11-19 13:21:46,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3149 to 1867. [2021-11-19 13:21:46,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1867 states, 1866 states have (on average 1.5819935691318328) internal successors, (2952), 1866 states have internal predecessors, (2952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:21:46,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1867 states to 1867 states and 2952 transitions. [2021-11-19 13:21:46,312 INFO L78 Accepts]: Start accepts. Automaton has 1867 states and 2952 transitions. Word has length 183 [2021-11-19 13:21:46,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:21:46,313 INFO L470 AbstractCegarLoop]: Abstraction has 1867 states and 2952 transitions. [2021-11-19 13:21:46,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:21:46,313 INFO L276 IsEmpty]: Start isEmpty. Operand 1867 states and 2952 transitions. [2021-11-19 13:21:46,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-11-19 13:21:46,319 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:21:46,320 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:21:46,350 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-19 13:21:46,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:21:46,544 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:21:46,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:21:46,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1261495379, now seen corresponding path program 1 times [2021-11-19 13:21:46,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:21:46,546 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [777063925] [2021-11-19 13:21:46,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:21:46,547 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:21:46,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:21:46,548 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:21:46,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 13:21:47,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:21:47,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:21:47,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:21:47,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:21:47,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:21:47,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:21:47,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:21:47,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:21:47,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:21:47,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:21:47,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:21:47,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:21:47,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:21:47,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:21:47,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:21:47,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:21:47,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:21:47,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:21:47,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:21:47,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:21:47,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:21:48,188 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-19 13:21:48,188 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 74 [2021-11-19 13:21:48,639 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 13:21:48,639 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 107 treesize of output 35 [2021-11-19 13:21:48,843 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 169 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 13:21:48,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:21:49,281 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 169 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 13:21:49,281 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:21:49,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [777063925] [2021-11-19 13:21:49,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [777063925] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:21:49,281 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:21:49,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 13:21:49,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040353590] [2021-11-19 13:21:49,281 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:21:49,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 13:21:49,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:21:49,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 13:21:49,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:21:49,283 INFO L87 Difference]: Start difference. First operand 1867 states and 2952 transitions. Second operand has 6 states, 6 states have (on average 20.833333333333332) internal successors, (125), 6 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:21:51,300 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:21:55,290 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:21:56,444 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:22:01,662 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:22:05,530 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:22:06,903 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:22:11,676 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:22:21,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:22:21,036 INFO L93 Difference]: Finished difference Result 4916 states and 7645 transitions. [2021-11-19 13:22:21,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 13:22:21,038 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.833333333333332) internal successors, (125), 6 states have internal predecessors, (125), 0 states have call successors, (0), 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 [2021-11-19 13:22:21,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:22:21,058 INFO L225 Difference]: With dead ends: 4916 [2021-11-19 13:22:21,058 INFO L226 Difference]: Without dead ends: 3059 [2021-11-19 13:22:21,062 INFO L932 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 [2021-11-19 13:22:21,062 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 223 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 69 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.5s IncrementalHoareTripleChecker+Time [2021-11-19 13:22:21,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 525 Invalid, 536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 466 Invalid, 1 Unknown, 0 Unchecked, 31.5s Time] [2021-11-19 13:22:21,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3059 states. [2021-11-19 13:22:21,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3059 to 1867. [2021-11-19 13:22:21,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1867 states, 1866 states have (on average 1.5632368703108253) internal successors, (2917), 1866 states have internal predecessors, (2917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:22:21,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1867 states to 1867 states and 2917 transitions. [2021-11-19 13:22:21,208 INFO L78 Accepts]: Start accepts. Automaton has 1867 states and 2917 transitions. Word has length 184 [2021-11-19 13:22:21,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:22:21,209 INFO L470 AbstractCegarLoop]: Abstraction has 1867 states and 2917 transitions. [2021-11-19 13:22:21,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.833333333333332) internal successors, (125), 6 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:22:21,210 INFO L276 IsEmpty]: Start isEmpty. Operand 1867 states and 2917 transitions. [2021-11-19 13:22:21,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-11-19 13:22:21,215 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:22:21,215 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:22:21,240 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-19 13:22:21,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:22:21,428 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:22:21,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:22:21,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1467880897, now seen corresponding path program 1 times [2021-11-19 13:22:21,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:22:21,430 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1156498446] [2021-11-19 13:22:21,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:22:21,430 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:22:21,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:22:21,431 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:22:21,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-19 13:22:22,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:22:22,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:22:22,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:22:22,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:22:22,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:22:22,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:22:22,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:22:22,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:22:22,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:22:22,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:22:22,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:22:22,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:22:22,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:22:22,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:22:22,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:22:22,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:22:22,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:22:22,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:22:22,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:22:22,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:22:22,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:22:23,097 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-19 13:22:23,097 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 74 [2021-11-19 13:22:23,555 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 13:22:23,556 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 107 treesize of output 35 [2021-11-19 13:22:23,852 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 175 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 13:22:23,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:22:24,332 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 175 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 13:22:24,332 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:22:24,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1156498446] [2021-11-19 13:22:24,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1156498446] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:22:24,333 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:22:24,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 13:22:24,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479700553] [2021-11-19 13:22:24,333 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:22:24,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 13:22:24,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:22:24,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 13:22:24,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:22:24,336 INFO L87 Difference]: Start difference. First operand 1867 states and 2917 transitions. Second operand has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:22:26,359 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:22:28,258 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:22:31,363 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:22:43,205 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:22:47,655 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:22:48,945 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:22:51,061 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:23:04,506 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:23:07,170 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:23:07,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:23:07,935 INFO L93 Difference]: Finished difference Result 5132 states and 7935 transitions. [2021-11-19 13:23:07,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 13:23:07,936 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 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 [2021-11-19 13:23:07,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:23:07,957 INFO L225 Difference]: With dead ends: 5132 [2021-11-19 13:23:07,957 INFO L226 Difference]: Without dead ends: 3275 [2021-11-19 13:23:07,960 INFO L932 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 [2021-11-19 13:23:07,961 INFO L933 BasicCegarLoop]: 185 mSDtfsCounter, 219 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 65 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 42.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 757 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 43.3s IncrementalHoareTripleChecker+Time [2021-11-19 13:23:07,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 757 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 607 Invalid, 1 Unknown, 0 Unchecked, 43.3s Time] [2021-11-19 13:23:07,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3275 states. [2021-11-19 13:23:08,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3275 to 1975. [2021-11-19 13:23:08,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1975 states, 1974 states have (on average 1.542046605876393) internal successors, (3044), 1974 states have internal predecessors, (3044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:23:08,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1975 states to 1975 states and 3044 transitions. [2021-11-19 13:23:08,147 INFO L78 Accepts]: Start accepts. Automaton has 1975 states and 3044 transitions. Word has length 184 [2021-11-19 13:23:08,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:23:08,148 INFO L470 AbstractCegarLoop]: Abstraction has 1975 states and 3044 transitions. [2021-11-19 13:23:08,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:23:08,148 INFO L276 IsEmpty]: Start isEmpty. Operand 1975 states and 3044 transitions. [2021-11-19 13:23:08,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-11-19 13:23:08,158 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:23:08,158 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:23:08,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-19 13:23:08,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:23:08,386 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:23:08,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:23:08,386 INFO L85 PathProgramCache]: Analyzing trace with hash -2145835448, now seen corresponding path program 1 times [2021-11-19 13:23:08,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:23:08,387 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1968007050] [2021-11-19 13:23:08,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:23:08,388 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:23:08,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:23:08,389 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:23:08,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 13:23:09,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:23:09,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:23:09,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:23:09,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:23:09,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:23:09,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:23:09,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:23:09,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:23:09,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:23:09,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:23:09,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:23:09,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:23:09,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:23:09,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:23:09,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:23:09,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:23:09,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:23:09,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:23:09,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:23:09,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:23:09,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:23:09,998 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-19 13:23:09,999 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 74 [2021-11-19 13:23:10,914 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 13:23:10,914 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 107 treesize of output 35 [2021-11-19 13:23:11,121 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 211 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 13:23:11,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:23:11,625 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 211 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 13:23:11,625 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:23:11,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1968007050] [2021-11-19 13:23:11,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1968007050] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:23:11,625 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:23:11,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 13:23:11,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149643535] [2021-11-19 13:23:11,626 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:23:11,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 13:23:11,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:23:11,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 13:23:11,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:23:11,628 INFO L87 Difference]: Start difference. First operand 1975 states and 3044 transitions. Second operand has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:23:13,648 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:23:16,654 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:23:18,534 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:23:19,574 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:23:29,373 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:23:34,395 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:23:36,440 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:23:41,342 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:23:43,014 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:23:44,157 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:23:45,455 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:23:46,602 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:23:55,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:23:55,714 INFO L93 Difference]: Finished difference Result 5114 states and 7811 transitions. [2021-11-19 13:23:55,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 13:23:55,716 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 0 states have call successors, (0), 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 [2021-11-19 13:23:55,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:23:55,731 INFO L225 Difference]: With dead ends: 5114 [2021-11-19 13:23:55,731 INFO L226 Difference]: Without dead ends: 3149 [2021-11-19 13:23:55,734 INFO L932 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 [2021-11-19 13:23:55,735 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 206 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 68 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 42.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 682 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 43.8s IncrementalHoareTripleChecker+Time [2021-11-19 13:23:55,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 682 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 604 Invalid, 2 Unknown, 0 Unchecked, 43.8s Time] [2021-11-19 13:23:55,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3149 states. [2021-11-19 13:23:55,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3149 to 1991. [2021-11-19 13:23:55,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1991 states, 1990 states have (on average 1.5326633165829147) internal successors, (3050), 1990 states have internal predecessors, (3050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:23:55,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1991 states to 1991 states and 3050 transitions. [2021-11-19 13:23:55,902 INFO L78 Accepts]: Start accepts. Automaton has 1991 states and 3050 transitions. Word has length 184 [2021-11-19 13:23:55,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:23:55,903 INFO L470 AbstractCegarLoop]: Abstraction has 1991 states and 3050 transitions. [2021-11-19 13:23:55,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:23:55,903 INFO L276 IsEmpty]: Start isEmpty. Operand 1991 states and 3050 transitions. [2021-11-19 13:23:55,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-11-19 13:23:55,909 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:23:55,910 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:23:55,944 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-11-19 13:23:56,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:23:56,134 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:23:56,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:23:56,134 INFO L85 PathProgramCache]: Analyzing trace with hash -174328440, now seen corresponding path program 1 times [2021-11-19 13:23:56,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:23:56,136 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [142332336] [2021-11-19 13:23:56,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:23:56,136 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:23:56,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:23:56,137 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:23:56,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-19 13:23:57,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:23:57,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:23:57,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:23:57,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:23:57,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:23:57,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:23:57,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:23:57,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:23:57,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:23:57,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:23:57,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:23:57,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:23:57,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:23:57,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:23:57,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:23:57,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:23:57,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:23:57,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:23:57,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:23:57,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:23:57,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:23:57,619 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-19 13:23:57,619 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 74 [2021-11-19 13:23:58,445 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 13:23:58,445 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 107 treesize of output 35 [2021-11-19 13:23:58,642 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 205 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 13:23:58,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:23:59,119 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 205 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 13:23:59,120 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:23:59,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [142332336] [2021-11-19 13:23:59,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [142332336] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:23:59,120 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:23:59,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 13:23:59,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26831427] [2021-11-19 13:23:59,121 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:23:59,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 13:23:59,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:23:59,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 13:23:59,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:23:59,123 INFO L87 Difference]: Start difference. First operand 1991 states and 3050 transitions. Second operand has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:24:01,154 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:24:04,611 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:24:12,825 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:24:17,310 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:24:20,408 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:24:21,468 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:24:23,877 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:24:28,944 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:24:38,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:24:38,809 INFO L93 Difference]: Finished difference Result 5328 states and 8115 transitions. [2021-11-19 13:24:38,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 13:24:38,812 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 states have internal predecessors, (131), 0 states have call successors, (0), 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 [2021-11-19 13:24:38,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:24:38,834 INFO L225 Difference]: With dead ends: 5328 [2021-11-19 13:24:38,834 INFO L226 Difference]: Without dead ends: 3347 [2021-11-19 13:24:38,836 INFO L932 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 [2021-11-19 13:24:38,837 INFO L933 BasicCegarLoop]: 159 mSDtfsCounter, 206 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 65 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 38.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 685 SdHoareTripleChecker+Invalid, 666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 39.4s IncrementalHoareTripleChecker+Time [2021-11-19 13:24:38,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 685 Invalid, 666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 599 Invalid, 2 Unknown, 0 Unchecked, 39.4s Time] [2021-11-19 13:24:38,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3347 states. [2021-11-19 13:24:39,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3347 to 2144. [2021-11-19 13:24:39,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2144 states, 2143 states have (on average 1.5202986467568829) internal successors, (3258), 2143 states have internal predecessors, (3258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:24:39,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2144 states to 2144 states and 3258 transitions. [2021-11-19 13:24:39,034 INFO L78 Accepts]: Start accepts. Automaton has 2144 states and 3258 transitions. Word has length 184 [2021-11-19 13:24:39,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:24:39,035 INFO L470 AbstractCegarLoop]: Abstraction has 2144 states and 3258 transitions. [2021-11-19 13:24:39,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:24:39,035 INFO L276 IsEmpty]: Start isEmpty. Operand 2144 states and 3258 transitions. [2021-11-19 13:24:39,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-11-19 13:24:39,043 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:24:39,043 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:24:39,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-19 13:24:39,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:24:39,257 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:24:39,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:24:39,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1652102553, now seen corresponding path program 1 times [2021-11-19 13:24:39,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:24:39,259 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1847967787] [2021-11-19 13:24:39,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:24:39,259 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:24:39,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:24:39,261 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:24:39,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-19 13:24:40,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:24:40,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:24:40,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:24:40,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:24:40,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:24:40,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:24:40,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:24:40,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:24:40,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:24:40,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:24:40,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:24:40,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:24:40,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:24:40,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:24:40,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:24:40,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:24:40,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:24:40,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:24:40,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:24:40,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:24:40,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:24:41,194 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-19 13:24:41,194 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 74 [2021-11-19 13:24:41,730 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 13:24:41,731 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 107 treesize of output 35 [2021-11-19 13:24:41,947 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 181 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 13:24:41,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:24:42,405 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 181 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 13:24:42,406 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:24:42,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1847967787] [2021-11-19 13:24:42,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1847967787] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:24:42,406 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:24:42,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 13:24:42,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515157486] [2021-11-19 13:24:42,407 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:24:42,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 13:24:42,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:24:42,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 13:24:42,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:24:42,409 INFO L87 Difference]: Start difference. First operand 2144 states and 3258 transitions. Second operand has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:24:44,431 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:24:45,476 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:24:54,663 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:25:00,353 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:25:01,958 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:25:03,846 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:25:21,966 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:25:25,211 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:25:25,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:25:25,452 INFO L93 Difference]: Finished difference Result 5526 states and 8369 transitions. [2021-11-19 13:25:25,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 13:25:25,454 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 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 [2021-11-19 13:25:25,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:25:25,466 INFO L225 Difference]: With dead ends: 5526 [2021-11-19 13:25:25,467 INFO L226 Difference]: Without dead ends: 3392 [2021-11-19 13:25:25,470 INFO L932 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 [2021-11-19 13:25:25,471 INFO L933 BasicCegarLoop]: 184 mSDtfsCounter, 212 mSDsluCounter, 568 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 63 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 41.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 752 SdHoareTripleChecker+Invalid, 657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 42.7s IncrementalHoareTripleChecker+Time [2021-11-19 13:25:25,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 752 Invalid, 657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 592 Invalid, 2 Unknown, 0 Unchecked, 42.7s Time] [2021-11-19 13:25:25,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3392 states. [2021-11-19 13:25:25,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3392 to 2153. [2021-11-19 13:25:25,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2153 states, 2152 states have (on average 1.5018587360594795) internal successors, (3232), 2152 states have internal predecessors, (3232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:25:25,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2153 states to 2153 states and 3232 transitions. [2021-11-19 13:25:25,689 INFO L78 Accepts]: Start accepts. Automaton has 2153 states and 3232 transitions. Word has length 185 [2021-11-19 13:25:25,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:25:25,690 INFO L470 AbstractCegarLoop]: Abstraction has 2153 states and 3232 transitions. [2021-11-19 13:25:25,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:25:25,690 INFO L276 IsEmpty]: Start isEmpty. Operand 2153 states and 3232 transitions. [2021-11-19 13:25:25,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-11-19 13:25:25,698 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:25:25,699 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:25:25,741 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-19 13:25:25,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:25:25,925 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:25:25,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:25:25,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1026052826, now seen corresponding path program 1 times [2021-11-19 13:25:25,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:25:25,927 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1784847342] [2021-11-19 13:25:25,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:25:25,927 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:25:25,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:25:25,928 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:25:25,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-19 13:25:27,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:25:27,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:25:27,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:25:27,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:25:27,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:25:27,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:25:27,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:25:27,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:25:27,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:25:27,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:25:27,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:25:27,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:25:27,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:25:27,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:25:27,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:25:27,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:25:27,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:25:27,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:25:27,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:25:27,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:25:27,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:25:27,913 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-19 13:25:27,913 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 74 [2021-11-19 13:25:28,709 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 13:25:28,710 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 107 treesize of output 35 [2021-11-19 13:25:29,013 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 187 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 13:25:29,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:25:29,677 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 187 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 13:25:29,677 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:25:29,677 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1784847342] [2021-11-19 13:25:29,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1784847342] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:25:29,678 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:25:29,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 13:25:29,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625980593] [2021-11-19 13:25:29,678 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:25:29,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 13:25:29,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:25:29,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 13:25:29,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:25:29,680 INFO L87 Difference]: Start difference. First operand 2153 states and 3232 transitions. Second operand has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:25:31,731 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:25:33,740 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:25:36,043 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:25:46,322 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:25:49,172 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:25:51,567 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:25:53,480 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:25:55,512 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:26:00,190 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:26:10,262 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:26:12,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:26:12,036 INFO L93 Difference]: Finished difference Result 5535 states and 8299 transitions. [2021-11-19 13:26:12,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 13:26:12,037 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 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 186 [2021-11-19 13:26:12,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:26:12,046 INFO L225 Difference]: With dead ends: 5535 [2021-11-19 13:26:12,046 INFO L226 Difference]: Without dead ends: 3392 [2021-11-19 13:26:12,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 366 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-19 13:26:12,050 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 208 mSDsluCounter, 593 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 63 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 41.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 776 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 42.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:26:12,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 776 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 607 Invalid, 3 Unknown, 0 Unchecked, 42.1s Time] [2021-11-19 13:26:12,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3392 states. [2021-11-19 13:26:12,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3392 to 2162. [2021-11-19 13:26:12,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2162 states, 2161 states have (on average 1.4835724201758445) internal successors, (3206), 2161 states have internal predecessors, (3206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:26:12,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2162 states to 2162 states and 3206 transitions. [2021-11-19 13:26:12,228 INFO L78 Accepts]: Start accepts. Automaton has 2162 states and 3206 transitions. Word has length 186 [2021-11-19 13:26:12,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:26:12,228 INFO L470 AbstractCegarLoop]: Abstraction has 2162 states and 3206 transitions. [2021-11-19 13:26:12,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:26:12,229 INFO L276 IsEmpty]: Start isEmpty. Operand 2162 states and 3206 transitions. [2021-11-19 13:26:12,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-11-19 13:26:12,245 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:26:12,246 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:26:12,283 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-19 13:26:12,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:26:12,460 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:26:12,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:26:12,461 INFO L85 PathProgramCache]: Analyzing trace with hash 237091604, now seen corresponding path program 1 times [2021-11-19 13:26:12,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:26:12,462 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1841322003] [2021-11-19 13:26:12,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:26:12,462 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:26:12,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:26:12,463 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:26:12,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-19 13:26:13,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:26:13,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:26:13,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:26:13,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:26:13,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:26:13,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:26:13,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:26:13,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:26:13,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:26:13,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:26:13,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:26:13,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:26:13,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:26:13,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:26:13,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:26:13,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:26:13,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:26:13,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:26:13,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:26:13,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:26:13,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:26:14,334 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-19 13:26:14,335 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 74 [2021-11-19 13:26:15,080 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 13:26:15,080 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 107 treesize of output 35 [2021-11-19 13:26:15,310 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 193 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 13:26:15,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:26:15,812 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 193 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 13:26:15,812 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:26:15,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1841322003] [2021-11-19 13:26:15,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1841322003] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:26:15,812 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:26:15,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 13:26:15,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848134061] [2021-11-19 13:26:15,813 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:26:15,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 13:26:15,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:26:15,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 13:26:15,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:26:15,814 INFO L87 Difference]: Start difference. First operand 2162 states and 3206 transitions. Second operand has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:26:17,843 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:26:20,150 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:26:22,521 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:26:30,039 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:26:31,696 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:26:36,493 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:26:39,385 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:26:43,267 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:26:45,005 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:26:47,967 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:26:56,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:26:56,744 INFO L93 Difference]: Finished difference Result 5364 states and 7968 transitions. [2021-11-19 13:26:56,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 13:26:56,745 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 0 states have call successors, (0), 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 187 [2021-11-19 13:26:56,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:26:56,750 INFO L225 Difference]: With dead ends: 5364 [2021-11-19 13:26:56,750 INFO L226 Difference]: Without dead ends: 3212 [2021-11-19 13:26:56,752 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 368 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-19 13:26:56,753 INFO L933 BasicCegarLoop]: 169 mSDtfsCounter, 200 mSDsluCounter, 541 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 60 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 39.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 710 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 40.6s IncrementalHoareTripleChecker+Time [2021-11-19 13:26:56,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 710 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 574 Invalid, 3 Unknown, 0 Unchecked, 40.6s Time] [2021-11-19 13:26:56,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3212 states. [2021-11-19 13:26:56,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3212 to 2162. [2021-11-19 13:26:56,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2162 states, 2161 states have (on average 1.4632114761684405) internal successors, (3162), 2161 states have internal predecessors, (3162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:26:56,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2162 states to 2162 states and 3162 transitions. [2021-11-19 13:26:56,939 INFO L78 Accepts]: Start accepts. Automaton has 2162 states and 3162 transitions. Word has length 187 [2021-11-19 13:26:56,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:26:56,940 INFO L470 AbstractCegarLoop]: Abstraction has 2162 states and 3162 transitions. [2021-11-19 13:26:56,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:26:56,940 INFO L276 IsEmpty]: Start isEmpty. Operand 2162 states and 3162 transitions. [2021-11-19 13:26:56,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-11-19 13:26:56,945 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:26:56,945 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:26:56,971 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-19 13:26:57,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:26:57,157 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:26:57,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:26:57,157 INFO L85 PathProgramCache]: Analyzing trace with hash -2008453910, now seen corresponding path program 1 times [2021-11-19 13:26:57,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:26:57,158 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1061977260] [2021-11-19 13:26:57,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:26:57,159 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:26:57,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:26:57,160 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:26:57,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-19 13:26:58,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:26:58,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:26:58,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:26:58,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:26:58,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:26:58,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:26:58,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:26:58,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:26:58,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:26:58,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:26:58,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:26:58,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:26:58,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:26:58,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:26:58,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:26:58,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:26:58,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:26:58,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:26:58,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:26:58,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:26:58,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:26:58,702 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-19 13:26:58,704 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 74 [2021-11-19 13:26:59,671 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 13:26:59,671 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 107 treesize of output 35 [2021-11-19 13:26:59,919 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 220 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 13:26:59,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:27:00,434 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 220 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 13:27:00,434 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:27:00,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1061977260] [2021-11-19 13:27:00,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1061977260] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:27:00,435 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:27:00,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 13:27:00,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17504814] [2021-11-19 13:27:00,435 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:27:00,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 13:27:00,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:27:00,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 13:27:00,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:27:00,437 INFO L87 Difference]: Start difference. First operand 2162 states and 3162 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) [2021-11-19 13:27:02,457 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:27:04,355 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:27:06,649 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:27:08,925 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:27:16,657 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:27:22,912 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:27:25,062 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:27:31,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:27:31,474 INFO L93 Difference]: Finished difference Result 5340 states and 7838 transitions. [2021-11-19 13:27:31,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 13:27:31,480 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 187 [2021-11-19 13:27:31,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:27:31,485 INFO L225 Difference]: With dead ends: 5340 [2021-11-19 13:27:31,485 INFO L226 Difference]: Without dead ends: 3428 [2021-11-19 13:27:31,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 368 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-19 13:27:31,488 INFO L933 BasicCegarLoop]: 307 mSDtfsCounter, 182 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 41 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 814 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.8s IncrementalHoareTripleChecker+Time [2021-11-19 13:27:31,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 814 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 457 Invalid, 1 Unknown, 0 Unchecked, 30.8s Time] [2021-11-19 13:27:31,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3428 states. [2021-11-19 13:27:31,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3428 to 2341. [2021-11-19 13:27:31,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2341 states, 2340 states have (on average 1.4431623931623931) internal successors, (3377), 2340 states have internal predecessors, (3377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:27:31,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2341 states to 2341 states and 3377 transitions. [2021-11-19 13:27:31,667 INFO L78 Accepts]: Start accepts. Automaton has 2341 states and 3377 transitions. Word has length 187 [2021-11-19 13:27:31,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:27:31,668 INFO L470 AbstractCegarLoop]: Abstraction has 2341 states and 3377 transitions. [2021-11-19 13:27:31,668 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) [2021-11-19 13:27:31,668 INFO L276 IsEmpty]: Start isEmpty. Operand 2341 states and 3377 transitions. [2021-11-19 13:27:31,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-11-19 13:27:31,673 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:27:31,673 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:27:31,699 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-19 13:27:31,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:27:31,879 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:27:31,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:27:31,880 INFO L85 PathProgramCache]: Analyzing trace with hash 462252043, now seen corresponding path program 1 times [2021-11-19 13:27:31,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:27:31,881 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1454517033] [2021-11-19 13:27:31,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:27:31,881 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:27:31,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:27:31,882 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:27:31,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-19 13:27:33,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:27:33,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:27:33,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:27:33,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:27:33,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:27:33,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:27:33,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:27:33,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:27:33,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:27:33,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:27:33,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:27:33,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:27:33,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:27:33,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:27:33,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:27:33,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:27:33,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:27:33,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:27:33,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:27:33,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:27:33,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:27:34,062 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-19 13:27:34,062 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 74 [2021-11-19 13:27:35,039 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 13:27:35,039 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 107 treesize of output 35 [2021-11-19 13:27:35,253 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 225 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 13:27:35,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:27:35,899 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 225 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 13:27:35,899 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:27:35,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1454517033] [2021-11-19 13:27:35,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1454517033] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:27:35,899 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:27:35,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 13:27:35,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115691022] [2021-11-19 13:27:35,900 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:27:35,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 13:27:35,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:27:35,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 13:27:35,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:27:35,902 INFO L87 Difference]: Start difference. First operand 2341 states and 3377 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) [2021-11-19 13:27:37,935 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:27:40,758 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:27:50,012 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:27:53,320 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:27:54,910 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:27:56,044 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:28:03,126 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:28:04,528 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:28:08,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:28:08,633 INFO L93 Difference]: Finished difference Result 5662 states and 8215 transitions. [2021-11-19 13:28:08,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 13:28:08,637 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 188 [2021-11-19 13:28:08,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:28:08,646 INFO L225 Difference]: With dead ends: 5662 [2021-11-19 13:28:08,647 INFO L226 Difference]: Without dead ends: 3591 [2021-11-19 13:28:08,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 370 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-19 13:28:08,651 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 187 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 57 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.4s IncrementalHoareTripleChecker+Time [2021-11-19 13:28:08,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 536 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 440 Invalid, 2 Unknown, 0 Unchecked, 32.4s Time] [2021-11-19 13:28:08,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3591 states. [2021-11-19 13:28:08,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3591 to 2521. [2021-11-19 13:28:08,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2521 states, 2520 states have (on average 1.4273809523809524) internal successors, (3597), 2520 states have internal predecessors, (3597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:28:08,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2521 states to 2521 states and 3597 transitions. [2021-11-19 13:28:08,892 INFO L78 Accepts]: Start accepts. Automaton has 2521 states and 3597 transitions. Word has length 188 [2021-11-19 13:28:08,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:28:08,893 INFO L470 AbstractCegarLoop]: Abstraction has 2521 states and 3597 transitions. [2021-11-19 13:28:08,893 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) [2021-11-19 13:28:08,894 INFO L276 IsEmpty]: Start isEmpty. Operand 2521 states and 3597 transitions. [2021-11-19 13:28:08,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-11-19 13:28:08,899 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:28:08,900 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:28:08,932 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-19 13:28:09,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:28:09,117 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:28:09,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:28:09,118 INFO L85 PathProgramCache]: Analyzing trace with hash 993833957, now seen corresponding path program 1 times [2021-11-19 13:28:09,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:28:09,120 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [11202239] [2021-11-19 13:28:09,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:28:09,121 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:28:09,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:28:09,122 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:28:09,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-19 13:28:10,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:28:10,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:28:10,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:28:10,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:28:10,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:28:10,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:28:10,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:28:10,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:28:10,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:28:10,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:28:10,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:28:10,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:28:10,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:28:10,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:28:10,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:28:10,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:28:10,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:28:10,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:28:10,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:28:10,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:28:10,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:28:11,082 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-19 13:28:11,082 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 74 [2021-11-19 13:28:12,196 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 13:28:12,197 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 107 treesize of output 35 [2021-11-19 13:28:12,418 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 230 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 13:28:12,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:28:12,893 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 230 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 13:28:12,894 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:28:12,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [11202239] [2021-11-19 13:28:12,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [11202239] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:28:12,894 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:28:12,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 13:28:12,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670154894] [2021-11-19 13:28:12,894 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:28:12,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 13:28:12,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:28:12,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 13:28:12,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:28:12,897 INFO L87 Difference]: Start difference. First operand 2521 states and 3597 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) [2021-11-19 13:28:14,932 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:28:26,291 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:28:28,354 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:28:30,289 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:28:38,200 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:28:48,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:28:48,356 INFO L93 Difference]: Finished difference Result 5964 states and 8565 transitions. [2021-11-19 13:28:48,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 13:28:48,357 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 189 [2021-11-19 13:28:48,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:28:48,362 INFO L225 Difference]: With dead ends: 5964 [2021-11-19 13:28:48,362 INFO L226 Difference]: Without dead ends: 3745 [2021-11-19 13:28:48,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 372 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-19 13:28:48,365 INFO L933 BasicCegarLoop]: 166 mSDtfsCounter, 182 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 57 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 698 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:28:48,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 698 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 570 Invalid, 2 Unknown, 0 Unchecked, 35.1s Time] [2021-11-19 13:28:48,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3745 states. [2021-11-19 13:28:48,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3745 to 2718. [2021-11-19 13:28:48,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2718 states, 2717 states have (on average 1.409642988590357) internal successors, (3830), 2717 states have internal predecessors, (3830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:28:48,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2718 states to 2718 states and 3830 transitions. [2021-11-19 13:28:48,573 INFO L78 Accepts]: Start accepts. Automaton has 2718 states and 3830 transitions. Word has length 189 [2021-11-19 13:28:48,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:28:48,573 INFO L470 AbstractCegarLoop]: Abstraction has 2718 states and 3830 transitions. [2021-11-19 13:28:48,573 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) [2021-11-19 13:28:48,574 INFO L276 IsEmpty]: Start isEmpty. Operand 2718 states and 3830 transitions. [2021-11-19 13:28:48,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-11-19 13:28:48,578 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:28:48,579 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:28:48,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-19 13:28:48,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:28:48,802 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:28:48,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:28:48,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1722993591, now seen corresponding path program 1 times [2021-11-19 13:28:48,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:28:48,804 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [7566656] [2021-11-19 13:28:48,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:28:48,804 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:28:48,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:28:48,805 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:28:48,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-19 13:28:49,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:28:49,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:28:49,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:28:49,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:28:49,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:28:49,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:28:49,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:28:49,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:28:49,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:28:49,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:28:49,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:28:49,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:28:49,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:28:49,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:28:49,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:28:49,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:28:49,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:28:49,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:28:49,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:28:49,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:28:49,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:28:50,021 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-19 13:28:50,021 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 74 [2021-11-19 13:28:51,081 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 13:28:51,081 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 107 treesize of output 35 [2021-11-19 13:28:51,289 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 237 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 13:28:51,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:28:51,762 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 237 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 13:28:51,763 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:28:51,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [7566656] [2021-11-19 13:28:51,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [7566656] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:28:51,763 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:28:51,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 13:28:51,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001720352] [2021-11-19 13:28:51,763 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:28:51,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 13:28:51,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:28:51,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 13:28:51,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:28:51,765 INFO L87 Difference]: Start difference. First operand 2718 states and 3830 transitions. Second operand has 6 states, 6 states have (on average 24.0) internal successors, (144), 6 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:28:53,791 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:28:58,117 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:29:01,713 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:29:07,023 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:29:10,325 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:29:13,255 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:29:15,312 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:29:17,282 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:29:28,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:29:28,783 INFO L93 Difference]: Finished difference Result 6607 states and 9373 transitions. [2021-11-19 13:29:28,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 13:29:28,791 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 24.0) internal successors, (144), 6 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 192 [2021-11-19 13:29:28,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:29:28,799 INFO L225 Difference]: With dead ends: 6607 [2021-11-19 13:29:28,800 INFO L226 Difference]: Without dead ends: 3910 [2021-11-19 13:29:28,803 INFO L932 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 [2021-11-19 13:29:28,804 INFO L933 BasicCegarLoop]: 180 mSDtfsCounter, 179 mSDsluCounter, 560 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 57 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 740 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.6s IncrementalHoareTripleChecker+Time [2021-11-19 13:29:28,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 740 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 570 Invalid, 1 Unknown, 0 Unchecked, 36.6s Time] [2021-11-19 13:29:28,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3910 states. [2021-11-19 13:29:29,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3910 to 2902. [2021-11-19 13:29:29,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2902 states, 2901 states have (on average 1.3940020682523269) internal successors, (4044), 2901 states have internal predecessors, (4044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:29:29,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2902 states to 2902 states and 4044 transitions. [2021-11-19 13:29:29,209 INFO L78 Accepts]: Start accepts. Automaton has 2902 states and 4044 transitions. Word has length 192 [2021-11-19 13:29:29,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:29:29,210 INFO L470 AbstractCegarLoop]: Abstraction has 2902 states and 4044 transitions. [2021-11-19 13:29:29,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.0) internal successors, (144), 6 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:29:29,211 INFO L276 IsEmpty]: Start isEmpty. Operand 2902 states and 4044 transitions. [2021-11-19 13:29:29,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-11-19 13:29:29,217 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:29:29,217 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:29:29,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-19 13:29:29,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:29:29,441 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:29:29,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:29:29,442 INFO L85 PathProgramCache]: Analyzing trace with hash -459825679, now seen corresponding path program 1 times [2021-11-19 13:29:29,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:29:29,443 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1843552596] [2021-11-19 13:29:29,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:29:29,444 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:29:29,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:29:29,446 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:29:29,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-19 13:29:30,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:29:30,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:29:30,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:29:30,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:29:30,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:29:30,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:29:30,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:29:30,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:29:30,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:29:30,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:29:30,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:29:30,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:29:30,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:29:30,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:29:30,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:29:30,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:29:30,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:29:30,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:29:30,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:29:30,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:29:30,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:29:31,224 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-19 13:29:31,224 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 74 [2021-11-19 13:29:32,559 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 13:29:32,560 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 107 treesize of output 35 [2021-11-19 13:29:32,784 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 241 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 13:29:32,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:29:33,434 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 241 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 13:29:33,434 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:29:33,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1843552596] [2021-11-19 13:29:33,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1843552596] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:29:33,435 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:29:33,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 13:29:33,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614163152] [2021-11-19 13:29:33,436 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:29:33,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 13:29:33,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:29:33,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 13:29:33,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:29:33,438 INFO L87 Difference]: Start difference. First operand 2902 states and 4044 transitions. Second operand has 6 states, 6 states have (on average 24.333333333333332) internal successors, (146), 6 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:29:35,491 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:29:43,854 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:29:45,217 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:29:46,986 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:29:48,450 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:29:50,648 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:29:53,551 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:29:57,765 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.97s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:30:02,871 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:30:03,980 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:30:12,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:30:12,131 INFO L93 Difference]: Finished difference Result 6737 states and 9485 transitions. [2021-11-19 13:30:12,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 13:30:12,134 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 24.333333333333332) internal successors, (146), 6 states have internal predecessors, (146), 0 states have call successors, (0), 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 [2021-11-19 13:30:12,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:30:12,138 INFO L225 Difference]: With dead ends: 6737 [2021-11-19 13:30:12,138 INFO L226 Difference]: Without dead ends: 3856 [2021-11-19 13:30:12,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 380 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-19 13:30:12,141 INFO L933 BasicCegarLoop]: 164 mSDtfsCounter, 172 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 59 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 37.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 530 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 38.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:30:12,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 530 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 428 Invalid, 3 Unknown, 0 Unchecked, 38.1s Time] [2021-11-19 13:30:12,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3856 states. [2021-11-19 13:30:12,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3856 to 2910. [2021-11-19 13:30:12,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2910 states, 2909 states have (on average 1.3867308353386043) internal successors, (4034), 2909 states have internal predecessors, (4034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:30:12,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2910 states to 2910 states and 4034 transitions. [2021-11-19 13:30:12,467 INFO L78 Accepts]: Start accepts. Automaton has 2910 states and 4034 transitions. Word has length 193 [2021-11-19 13:30:12,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:30:12,468 INFO L470 AbstractCegarLoop]: Abstraction has 2910 states and 4034 transitions. [2021-11-19 13:30:12,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.333333333333332) internal successors, (146), 6 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:30:12,468 INFO L276 IsEmpty]: Start isEmpty. Operand 2910 states and 4034 transitions. [2021-11-19 13:30:12,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-11-19 13:30:12,472 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:30:12,473 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:30:12,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-19 13:30:12,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:30:12,673 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:30:12,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:30:12,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1522578341, now seen corresponding path program 1 times [2021-11-19 13:30:12,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:30:12,676 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2030278114] [2021-11-19 13:30:12,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:30:12,677 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:30:12,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:30:12,678 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:30:12,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-19 13:30:13,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:30:13,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:30:13,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:30:14,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:30:14,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:30:14,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:30:14,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:30:14,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:30:14,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:30:14,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:30:14,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:30:14,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:30:14,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:30:14,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:30:14,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:30:14,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:30:14,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:30:14,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:30:14,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:30:14,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:30:14,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:30:14,466 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-19 13:30:14,467 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 74 [2021-11-19 13:30:15,988 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 13:30:15,989 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 107 treesize of output 35 [2021-11-19 13:30:16,287 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 246 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 13:30:16,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:30:16,864 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 246 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 13:30:16,865 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:30:16,865 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2030278114] [2021-11-19 13:30:16,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2030278114] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:30:16,865 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:30:16,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 13:30:16,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15787079] [2021-11-19 13:30:16,866 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:30:16,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 13:30:16,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:30:16,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 13:30:16,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:30:16,867 INFO L87 Difference]: Start difference. First operand 2910 states and 4034 transitions. Second operand has 6 states, 6 states have (on average 24.666666666666668) internal successors, (148), 6 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:30:18,889 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:30:22,465 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:30:28,529 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:30:31,810 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:30:33,293 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:30:35,756 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:30:37,768 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:30:39,828 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:30:43,344 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:30:45,554 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:30:48,729 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:30:50,537 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:31:00,678 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:31:01,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:31:01,395 INFO L93 Difference]: Finished difference Result 6696 states and 9385 transitions. [2021-11-19 13:31:01,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 13:31:01,397 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 24.666666666666668) internal successors, (148), 6 states have internal predecessors, (148), 0 states have call successors, (0), 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 [2021-11-19 13:31:01,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:31:01,417 INFO L225 Difference]: With dead ends: 6696 [2021-11-19 13:31:01,418 INFO L226 Difference]: Without dead ends: 3807 [2021-11-19 13:31:01,421 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 380 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-19 13:31:01,422 INFO L933 BasicCegarLoop]: 164 mSDtfsCounter, 160 mSDsluCounter, 529 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 58 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 43.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 693 SdHoareTripleChecker+Invalid, 612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 44.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:31:01,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 693 Invalid, 612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 550 Invalid, 4 Unknown, 0 Unchecked, 44.0s Time] [2021-11-19 13:31:01,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3807 states. [2021-11-19 13:31:01,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3807 to 2927. [2021-11-19 13:31:01,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2927 states, 2926 states have (on average 1.384142173615858) internal successors, (4050), 2926 states have internal predecessors, (4050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:31:01,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2927 states to 2927 states and 4050 transitions. [2021-11-19 13:31:01,688 INFO L78 Accepts]: Start accepts. Automaton has 2927 states and 4050 transitions. Word has length 193 [2021-11-19 13:31:01,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:31:01,689 INFO L470 AbstractCegarLoop]: Abstraction has 2927 states and 4050 transitions. [2021-11-19 13:31:01,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.666666666666668) internal successors, (148), 6 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:31:01,690 INFO L276 IsEmpty]: Start isEmpty. Operand 2927 states and 4050 transitions. [2021-11-19 13:31:01,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-11-19 13:31:01,695 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:31:01,696 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:31:01,740 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2021-11-19 13:31:01,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:31:01,912 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:31:01,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:31:01,913 INFO L85 PathProgramCache]: Analyzing trace with hash -424111708, now seen corresponding path program 1 times [2021-11-19 13:31:01,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:31:01,915 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1499911550] [2021-11-19 13:31:01,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:31:01,915 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:31:01,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:31:01,917 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:31:01,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d496159-62a5-4b45-86b4-cf4d1d60f2aa/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-19 13:31:03,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:31:03,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:31:03,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:31:03,405 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 162 treesize of output 138 [2021-11-19 13:31:03,411 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 138 treesize of output 90 [2021-11-19 13:31:03,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:31:03,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:31:03,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:31:03,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:31:03,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 13:31:03,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:31:03,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:31:03,426 INFO L190 IndexEqualityManager]: detected not equals via solver