./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec3_product13.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec3_product13.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c1a514ed3c88dbb6b86d895b5ccbc4ee84ef064cf150167d71ca780388d60956 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:17:35,197 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:17:35,200 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:17:35,261 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:17:35,262 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:17:35,267 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:17:35,269 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:17:35,274 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:17:35,277 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:17:35,283 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:17:35,284 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:17:35,287 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:17:35,287 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:17:35,290 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:17:35,292 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:17:35,301 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:17:35,303 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:17:35,305 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:17:35,307 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:17:35,316 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:17:35,318 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:17:35,320 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:17:35,323 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:17:35,325 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:17:35,335 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:17:35,335 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:17:35,336 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:17:35,338 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:17:35,339 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:17:35,341 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:17:35,341 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:17:35,342 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:17:35,345 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:17:35,346 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:17:35,348 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:17:35,348 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:17:35,349 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:17:35,349 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:17:35,350 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:17:35,351 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:17:35,352 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:17:35,353 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 02:17:35,401 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:17:35,401 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:17:35,403 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:17:35,403 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:17:35,404 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:17:35,404 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:17:35,404 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 02:17:35,412 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:17:35,412 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:17:35,412 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 02:17:35,414 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 02:17:35,414 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:17:35,415 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 02:17:35,415 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 02:17:35,415 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 02:17:35,416 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:17:35,417 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:17:35,417 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 02:17:35,417 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:17:35,418 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:17:35,418 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:17:35,418 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:17:35,419 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:17:35,419 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:17:35,419 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:17:35,419 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:17:35,420 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:17:35,420 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:17:35,421 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:17:35,422 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:17:35,423 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:17:35,423 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:17:35,424 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:17:35,424 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:17:35,424 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 02:17:35,425 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 02:17:35,425 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:17:35,425 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:17:35,426 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:17:35,426 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_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c1a514ed3c88dbb6b86d895b5ccbc4ee84ef064cf150167d71ca780388d60956 [2021-11-07 02:17:35,737 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:17:35,766 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:17:35,769 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:17:35,771 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:17:35,772 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:17:35,773 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec3_product13.cil.c [2021-11-07 02:17:35,843 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/data/7b75f57c7/443bac0e7b3244d2a23047f307f27d4b/FLAG5cd05a9fe [2021-11-07 02:17:36,473 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:17:36,474 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/sv-benchmarks/c/product-lines/email_spec3_product13.cil.c [2021-11-07 02:17:36,495 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/data/7b75f57c7/443bac0e7b3244d2a23047f307f27d4b/FLAG5cd05a9fe [2021-11-07 02:17:36,708 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/data/7b75f57c7/443bac0e7b3244d2a23047f307f27d4b [2021-11-07 02:17:36,710 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:17:36,712 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:17:36,714 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:17:36,714 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:17:36,717 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:17:36,718 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:17:36" (1/1) ... [2021-11-07 02:17:36,719 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3630e6f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:17:36, skipping insertion in model container [2021-11-07 02:17:36,720 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:17:36" (1/1) ... [2021-11-07 02:17:36,727 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:17:36,805 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:17:37,532 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/sv-benchmarks/c/product-lines/email_spec3_product13.cil.c[62004,62017] [2021-11-07 02:17:37,537 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:17:37,557 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-07 02:17:37,558 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7cac8aed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:17:37, skipping insertion in model container [2021-11-07 02:17:37,558 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:17:37,558 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 02:17:37,561 INFO L168 Benchmark]: Toolchain (without parser) took 847.47 ms. Allocated memory is still 109.1 MB. Free memory was 65.1 MB in the beginning and 68.5 MB in the end (delta: -3.5 MB). Peak memory consumption was 10.9 MB. Max. memory is 16.1 GB. [2021-11-07 02:17:37,562 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 109.1 MB. Free memory is still 84.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 02:17:37,564 INFO L168 Benchmark]: CACSL2BoogieTranslator took 844.67 ms. Allocated memory is still 109.1 MB. Free memory was 65.0 MB in the beginning and 68.5 MB in the end (delta: -3.6 MB). Peak memory consumption was 10.9 MB. Max. memory is 16.1 GB. [2021-11-07 02:17:37,566 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 109.1 MB. Free memory is still 84.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 844.67 ms. Allocated memory is still 109.1 MB. Free memory was 65.0 MB in the beginning and 68.5 MB in the end (delta: -3.6 MB). Peak memory consumption was 10.9 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1456]: 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_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec3_product13.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c1a514ed3c88dbb6b86d895b5ccbc4ee84ef064cf150167d71ca780388d60956 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:17:39,952 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:17:39,955 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:17:40,000 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:17:40,001 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:17:40,003 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:17:40,004 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:17:40,007 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:17:40,009 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:17:40,010 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:17:40,012 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:17:40,013 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:17:40,014 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:17:40,016 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:17:40,017 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:17:40,019 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:17:40,020 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:17:40,022 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:17:40,024 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:17:40,027 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:17:40,029 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:17:40,037 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:17:40,038 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:17:40,042 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:17:40,047 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:17:40,053 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:17:40,054 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:17:40,058 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:17:40,060 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:17:40,061 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:17:40,062 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:17:40,063 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:17:40,064 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:17:40,066 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:17:40,068 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:17:40,068 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:17:40,069 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:17:40,070 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:17:40,071 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:17:40,073 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:17:40,074 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:17:40,075 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 02:17:40,129 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:17:40,129 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:17:40,131 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:17:40,131 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:17:40,132 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:17:40,132 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:17:40,132 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:17:40,132 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:17:40,132 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:17:40,134 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:17:40,136 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:17:40,136 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:17:40,136 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:17:40,137 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:17:40,137 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:17:40,137 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:17:40,137 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:17:40,137 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 02:17:40,138 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 02:17:40,138 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:17:40,138 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:17:40,138 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:17:40,139 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:17:40,139 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:17:40,139 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 02:17:40,139 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:17:40,140 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:17:40,140 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:17:40,140 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:17:40,141 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:17:40,141 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 02:17:40,141 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 02:17:40,141 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:17:40,142 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:17:40,142 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:17:40,142 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_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c1a514ed3c88dbb6b86d895b5ccbc4ee84ef064cf150167d71ca780388d60956 [2021-11-07 02:17:40,578 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:17:40,603 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:17:40,606 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:17:40,607 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:17:40,608 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:17:40,609 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec3_product13.cil.c [2021-11-07 02:17:40,685 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/data/d0705da9d/35a7656f128f48209ef2a1a588c60d71/FLAGec403ade3 [2021-11-07 02:17:41,338 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:17:41,338 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/sv-benchmarks/c/product-lines/email_spec3_product13.cil.c [2021-11-07 02:17:41,376 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/data/d0705da9d/35a7656f128f48209ef2a1a588c60d71/FLAGec403ade3 [2021-11-07 02:17:41,566 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/data/d0705da9d/35a7656f128f48209ef2a1a588c60d71 [2021-11-07 02:17:41,568 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:17:41,569 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:17:41,583 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:17:41,584 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:17:41,588 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:17:41,589 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:17:41" (1/1) ... [2021-11-07 02:17:41,590 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60e6660d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:17:41, skipping insertion in model container [2021-11-07 02:17:41,590 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:17:41" (1/1) ... [2021-11-07 02:17:41,598 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:17:41,691 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:17:42,338 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/sv-benchmarks/c/product-lines/email_spec3_product13.cil.c[62004,62017] [2021-11-07 02:17:42,343 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:17:42,360 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 02:17:42,382 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:17:42,526 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/sv-benchmarks/c/product-lines/email_spec3_product13.cil.c[62004,62017] [2021-11-07 02:17:42,528 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:17:42,559 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 02:17:42,640 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/sv-benchmarks/c/product-lines/email_spec3_product13.cil.c[62004,62017] [2021-11-07 02:17:42,642 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:17:42,679 INFO L208 MainTranslator]: Completed translation [2021-11-07 02:17:42,680 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:17:42 WrapperNode [2021-11-07 02:17:42,680 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:17:42,681 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 02:17:42,682 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 02:17:42,682 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 02:17:42,689 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:17:42" (1/1) ... [2021-11-07 02:17:42,724 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:17:42" (1/1) ... [2021-11-07 02:17:42,844 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 02:17:42,845 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 02:17:42,845 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 02:17:42,845 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 02:17:42,854 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:17:42" (1/1) ... [2021-11-07 02:17:42,854 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:17:42" (1/1) ... [2021-11-07 02:17:42,864 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:17:42" (1/1) ... [2021-11-07 02:17:42,865 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:17:42" (1/1) ... [2021-11-07 02:17:42,901 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:17:42" (1/1) ... [2021-11-07 02:17:42,924 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:17:42" (1/1) ... [2021-11-07 02:17:42,933 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:17:42" (1/1) ... [2021-11-07 02:17:42,964 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 02:17:42,965 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 02:17:42,965 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 02:17:42,965 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 02:17:42,966 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:17:42" (1/1) ... [2021-11-07 02:17:42,973 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:17:43,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:17:43,024 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 02:17:43,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 02:17:43,074 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 02:17:43,074 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 02:17:43,077 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 02:17:43,077 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 02:17:43,077 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 02:17:47,504 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 02:17:47,505 INFO L299 CfgBuilder]: Removed 255 assume(true) statements. [2021-11-07 02:17:47,508 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:17:47 BoogieIcfgContainer [2021-11-07 02:17:47,508 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 02:17:47,510 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 02:17:47,510 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 02:17:47,514 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 02:17:47,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:17:41" (1/3) ... [2021-11-07 02:17:47,515 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@605e1799 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:17:47, skipping insertion in model container [2021-11-07 02:17:47,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:17:42" (2/3) ... [2021-11-07 02:17:47,516 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@605e1799 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:17:47, skipping insertion in model container [2021-11-07 02:17:47,516 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:17:47" (3/3) ... [2021-11-07 02:17:47,517 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec3_product13.cil.c [2021-11-07 02:17:47,523 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 02:17:47,524 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2021-11-07 02:17:47,599 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 02:17:47,609 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 02:17:47,609 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-11-07 02:17:47,644 INFO L276 IsEmpty]: Start isEmpty. Operand has 421 states, 416 states have (on average 1.7716346153846154) internal successors, (737), 420 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:17:47,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-07 02:17:47,656 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:17:47,657 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:17:47,658 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 02:17:47,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:17:47,663 INFO L85 PathProgramCache]: Analyzing trace with hash 510644634, now seen corresponding path program 1 times [2021-11-07 02:17:47,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:17:47,678 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1053941370] [2021-11-07 02:17:47,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:17:47,679 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:17:47,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:17:47,682 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:17:47,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 02:17:48,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:17:48,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 02:17:48,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:17:48,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:17:48,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:17:48,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:17:48,498 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:17:48,498 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1053941370] [2021-11-07 02:17:48,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1053941370] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:17:48,499 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:17:48,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 02:17:48,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585802994] [2021-11-07 02:17:48,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 02:17:48,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:17:48,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 02:17:48,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 02:17:48,532 INFO L87 Difference]: Start difference. First operand has 421 states, 416 states have (on average 1.7716346153846154) internal successors, (737), 420 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 23.0) internal successors, (46), 2 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:17:48,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:17:48,605 INFO L93 Difference]: Finished difference Result 604 states and 1040 transitions. [2021-11-07 02:17:48,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 02:17:48,606 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 23.0) internal successors, (46), 2 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-07 02:17:48,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:17:48,625 INFO L225 Difference]: With dead ends: 604 [2021-11-07 02:17:48,625 INFO L226 Difference]: Without dead ends: 385 [2021-11-07 02:17:48,629 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 02:17:48,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2021-11-07 02:17:48,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 385. [2021-11-07 02:17:48,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 381 states have (on average 1.7559055118110236) internal successors, (669), 384 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:17:48,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 669 transitions. [2021-11-07 02:17:48,725 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 669 transitions. Word has length 46 [2021-11-07 02:17:48,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:17:48,726 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 669 transitions. [2021-11-07 02:17:48,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 23.0) internal successors, (46), 2 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:17:48,726 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 669 transitions. [2021-11-07 02:17:48,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-07 02:17:48,730 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:17:48,731 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:17:48,746 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 02:17:48,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:17:48,932 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 02:17:48,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:17:48,933 INFO L85 PathProgramCache]: Analyzing trace with hash 501583462, now seen corresponding path program 1 times [2021-11-07 02:17:48,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:17:48,934 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [67100602] [2021-11-07 02:17:48,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:17:48,934 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:17:48,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:17:48,935 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:17:48,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 02:17:49,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:17:49,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:17:49,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:17:49,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:17:49,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:17:49,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:17:49,822 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:17:49,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [67100602] [2021-11-07 02:17:49,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [67100602] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:17:49,823 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:17:49,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:17:49,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587721393] [2021-11-07 02:17:49,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:17:49,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:17:49,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:17:49,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:17:49,830 INFO L87 Difference]: Start difference. First operand 385 states and 669 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:17:49,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:17:49,945 INFO L93 Difference]: Finished difference Result 1125 states and 1959 transitions. [2021-11-07 02:17:49,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:17:49,946 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-07 02:17:49,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:17:49,954 INFO L225 Difference]: With dead ends: 1125 [2021-11-07 02:17:49,954 INFO L226 Difference]: Without dead ends: 755 [2021-11-07 02:17:49,960 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:17:49,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2021-11-07 02:17:50,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 384. [2021-11-07 02:17:50,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 380 states have (on average 1.7473684210526317) internal successors, (664), 383 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:17:50,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 664 transitions. [2021-11-07 02:17:50,021 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 664 transitions. Word has length 47 [2021-11-07 02:17:50,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:17:50,022 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 664 transitions. [2021-11-07 02:17:50,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:17:50,022 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 664 transitions. [2021-11-07 02:17:50,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-07 02:17:50,034 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:17:50,035 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:17:50,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 02:17:50,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:17:50,250 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 02:17:50,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:17:50,250 INFO L85 PathProgramCache]: Analyzing trace with hash 7197516, now seen corresponding path program 1 times [2021-11-07 02:17:50,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:17:50,252 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1405297942] [2021-11-07 02:17:50,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:17:50,252 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:17:50,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:17:50,258 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:17:50,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 02:17:50,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:17:50,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:17:50,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:17:50,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:17:50,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:17:51,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:17:51,013 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:17:51,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1405297942] [2021-11-07 02:17:51,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1405297942] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:17:51,013 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:17:51,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:17:51,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335450816] [2021-11-07 02:17:51,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:17:51,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:17:51,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:17:51,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:17:51,016 INFO L87 Difference]: Start difference. First operand 384 states and 664 transitions. Second operand has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:17:51,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:17:51,244 INFO L93 Difference]: Finished difference Result 1453 states and 2518 transitions. [2021-11-07 02:17:51,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:17:51,245 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-11-07 02:17:51,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:17:51,253 INFO L225 Difference]: With dead ends: 1453 [2021-11-07 02:17:51,253 INFO L226 Difference]: Without dead ends: 1087 [2021-11-07 02:17:51,255 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:17:51,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1087 states. [2021-11-07 02:17:51,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1087 to 383. [2021-11-07 02:17:51,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 379 states have (on average 1.7414248021108178) internal successors, (660), 382 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:17:51,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 660 transitions. [2021-11-07 02:17:51,300 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 660 transitions. Word has length 49 [2021-11-07 02:17:51,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:17:51,300 INFO L470 AbstractCegarLoop]: Abstraction has 383 states and 660 transitions. [2021-11-07 02:17:51,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:17:51,301 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 660 transitions. [2021-11-07 02:17:51,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-07 02:17:51,302 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:17:51,303 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:17:51,318 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 02:17:51,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:17:51,517 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 02:17:51,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:17:51,518 INFO L85 PathProgramCache]: Analyzing trace with hash -347648097, now seen corresponding path program 1 times [2021-11-07 02:17:51,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:17:51,522 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [694805913] [2021-11-07 02:17:51,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:17:51,524 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:17:51,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:17:51,525 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:17:51,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 02:17:51,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:17:51,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:17:51,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:17:52,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:17:52,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:17:52,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:17:52,211 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:17:52,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [694805913] [2021-11-07 02:17:52,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [694805913] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:17:52,212 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:17:52,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:17:52,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392956777] [2021-11-07 02:17:52,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:17:52,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:17:52,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:17:52,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:17:52,214 INFO L87 Difference]: Start difference. First operand 383 states and 660 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:17:52,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:17:52,286 INFO L93 Difference]: Finished difference Result 763 states and 1317 transitions. [2021-11-07 02:17:52,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:17:52,287 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-07 02:17:52,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:17:52,290 INFO L225 Difference]: With dead ends: 763 [2021-11-07 02:17:52,290 INFO L226 Difference]: Without dead ends: 388 [2021-11-07 02:17:52,291 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:17:52,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2021-11-07 02:17:52,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 383. [2021-11-07 02:17:52,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 379 states have (on average 1.733509234828496) internal successors, (657), 382 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:17:52,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 657 transitions. [2021-11-07 02:17:52,318 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 657 transitions. Word has length 50 [2021-11-07 02:17:52,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:17:52,318 INFO L470 AbstractCegarLoop]: Abstraction has 383 states and 657 transitions. [2021-11-07 02:17:52,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:17:52,319 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 657 transitions. [2021-11-07 02:17:52,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-07 02:17:52,320 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:17:52,321 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:17:52,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 02:17:52,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:17:52,535 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 02:17:52,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:17:52,536 INFO L85 PathProgramCache]: Analyzing trace with hash -364582860, now seen corresponding path program 1 times [2021-11-07 02:17:52,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:17:52,537 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [845625789] [2021-11-07 02:17:52,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:17:52,538 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:17:52,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:17:52,539 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:17:52,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 02:17:53,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:17:53,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:17:53,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:17:53,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:17:53,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:17:53,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:17:53,324 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:17:53,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [845625789] [2021-11-07 02:17:53,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [845625789] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:17:53,325 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:17:53,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:17:53,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044293199] [2021-11-07 02:17:53,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:17:53,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:17:53,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:17:53,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:17:53,326 INFO L87 Difference]: Start difference. First operand 383 states and 657 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:17:53,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:17:53,558 INFO L93 Difference]: Finished difference Result 1440 states and 2494 transitions. [2021-11-07 02:17:53,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:17:53,559 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-07 02:17:53,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:17:53,566 INFO L225 Difference]: With dead ends: 1440 [2021-11-07 02:17:53,566 INFO L226 Difference]: Without dead ends: 1083 [2021-11-07 02:17:53,567 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:17:53,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1083 states. [2021-11-07 02:17:53,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1083 to 383. [2021-11-07 02:17:53,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 379 states have (on average 1.725593667546174) internal successors, (654), 382 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:17:53,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 654 transitions. [2021-11-07 02:17:53,604 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 654 transitions. Word has length 51 [2021-11-07 02:17:53,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:17:53,605 INFO L470 AbstractCegarLoop]: Abstraction has 383 states and 654 transitions. [2021-11-07 02:17:53,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:17:53,605 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 654 transitions. [2021-11-07 02:17:53,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-07 02:17:53,606 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:17:53,607 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:17:53,626 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 02:17:53,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:17:53,822 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 02:17:53,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:17:53,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1870267409, now seen corresponding path program 1 times [2021-11-07 02:17:53,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:17:53,823 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [827959266] [2021-11-07 02:17:53,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:17:53,823 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:17:53,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:17:53,825 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:17:53,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 02:17:54,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:17:54,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:17:54,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:17:54,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:17:54,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:17:54,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:17:54,533 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:17:54,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [827959266] [2021-11-07 02:17:54,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [827959266] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:17:54,534 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:17:54,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:17:54,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428446111] [2021-11-07 02:17:54,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:17:54,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:17:54,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:17:54,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:17:54,536 INFO L87 Difference]: Start difference. First operand 383 states and 654 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:17:54,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:17:54,611 INFO L93 Difference]: Finished difference Result 887 states and 1516 transitions. [2021-11-07 02:17:54,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:17:54,612 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-07 02:17:54,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:17:54,617 INFO L225 Difference]: With dead ends: 887 [2021-11-07 02:17:54,617 INFO L226 Difference]: Without dead ends: 740 [2021-11-07 02:17:54,618 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:17:54,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2021-11-07 02:17:54,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 593. [2021-11-07 02:17:54,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 589 states have (on average 1.762308998302207) internal successors, (1038), 592 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:17:54,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 1038 transitions. [2021-11-07 02:17:54,666 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 1038 transitions. Word has length 53 [2021-11-07 02:17:54,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:17:54,667 INFO L470 AbstractCegarLoop]: Abstraction has 593 states and 1038 transitions. [2021-11-07 02:17:54,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:17:54,667 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 1038 transitions. [2021-11-07 02:17:54,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 02:17:54,669 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:17:54,669 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:17:54,687 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 02:17:54,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:17:54,884 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 02:17:54,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:17:54,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1449816992, now seen corresponding path program 1 times [2021-11-07 02:17:54,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:17:54,885 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1124896841] [2021-11-07 02:17:54,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:17:54,885 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:17:54,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:17:54,886 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:17:54,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 02:17:55,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:17:55,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:17:55,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:17:55,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:17:55,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:17:55,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:17:55,696 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:17:55,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1124896841] [2021-11-07 02:17:55,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1124896841] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:17:55,697 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:17:55,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:17:55,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458905925] [2021-11-07 02:17:55,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:17:55,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:17:55,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:17:55,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:17:55,698 INFO L87 Difference]: Start difference. First operand 593 states and 1038 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:17:55,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:17:55,785 INFO L93 Difference]: Finished difference Result 1407 states and 2469 transitions. [2021-11-07 02:17:55,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:17:55,786 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-07 02:17:55,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:17:55,792 INFO L225 Difference]: With dead ends: 1407 [2021-11-07 02:17:55,792 INFO L226 Difference]: Without dead ends: 898 [2021-11-07 02:17:55,793 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:17:55,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2021-11-07 02:17:55,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 751. [2021-11-07 02:17:55,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 751 states, 747 states have (on average 1.7737617135207497) internal successors, (1325), 750 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:17:55,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 1325 transitions. [2021-11-07 02:17:55,865 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 1325 transitions. Word has length 65 [2021-11-07 02:17:55,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:17:55,865 INFO L470 AbstractCegarLoop]: Abstraction has 751 states and 1325 transitions. [2021-11-07 02:17:55,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:17:55,865 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 1325 transitions. [2021-11-07 02:17:55,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 02:17:55,867 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:17:55,868 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:17:55,886 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 02:17:56,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:17:56,083 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 02:17:56,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:17:56,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1045894079, now seen corresponding path program 1 times [2021-11-07 02:17:56,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:17:56,084 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2035750484] [2021-11-07 02:17:56,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:17:56,084 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:17:56,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:17:56,085 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:17:56,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 02:17:56,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:17:56,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:17:56,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:17:56,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:17:56,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:17:56,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:17:56,821 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:17:56,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2035750484] [2021-11-07 02:17:56,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2035750484] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:17:56,821 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:17:56,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:17:56,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118454593] [2021-11-07 02:17:56,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:17:56,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:17:56,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:17:56,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:17:56,823 INFO L87 Difference]: Start difference. First operand 751 states and 1325 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:17:56,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:17:56,933 INFO L93 Difference]: Finished difference Result 1925 states and 3416 transitions. [2021-11-07 02:17:56,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:17:56,934 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-07 02:17:56,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:17:56,942 INFO L225 Difference]: With dead ends: 1925 [2021-11-07 02:17:56,942 INFO L226 Difference]: Without dead ends: 1262 [2021-11-07 02:17:56,943 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:17:56,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1262 states. [2021-11-07 02:17:57,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1262 to 1115. [2021-11-07 02:17:57,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1115 states, 1111 states have (on average 1.7902790279027903) internal successors, (1989), 1114 states have internal predecessors, (1989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:17:57,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1115 states to 1115 states and 1989 transitions. [2021-11-07 02:17:57,031 INFO L78 Accepts]: Start accepts. Automaton has 1115 states and 1989 transitions. Word has length 66 [2021-11-07 02:17:57,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:17:57,032 INFO L470 AbstractCegarLoop]: Abstraction has 1115 states and 1989 transitions. [2021-11-07 02:17:57,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:17:57,032 INFO L276 IsEmpty]: Start isEmpty. Operand 1115 states and 1989 transitions. [2021-11-07 02:17:57,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 02:17:57,035 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:17:57,035 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 02:17:57,058 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 02:17:57,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:17:57,250 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 02:17:57,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:17:57,250 INFO L85 PathProgramCache]: Analyzing trace with hash 836966735, now seen corresponding path program 1 times [2021-11-07 02:17:57,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:17:57,251 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [973739503] [2021-11-07 02:17:57,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:17:57,251 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:17:57,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:17:57,252 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:17:57,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 02:17:57,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:17:57,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:17:57,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:17:57,900 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:17:57,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:17:58,049 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:17:58,049 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:17:58,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [973739503] [2021-11-07 02:17:58,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [973739503] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:17:58,050 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:17:58,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:17:58,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792415081] [2021-11-07 02:17:58,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:17:58,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:17:58,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:17:58,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:17:58,051 INFO L87 Difference]: Start difference. First operand 1115 states and 1989 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:17:58,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:17:58,156 INFO L93 Difference]: Finished difference Result 2135 states and 3797 transitions. [2021-11-07 02:17:58,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:17:58,157 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-07 02:17:58,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:17:58,165 INFO L225 Difference]: With dead ends: 2135 [2021-11-07 02:17:58,165 INFO L226 Difference]: Without dead ends: 1262 [2021-11-07 02:17:58,167 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:17:58,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1262 states. [2021-11-07 02:17:58,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1262 to 1115. [2021-11-07 02:17:58,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1115 states, 1111 states have (on average 1.7884788478847884) internal successors, (1987), 1114 states have internal predecessors, (1987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:17:58,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1115 states to 1115 states and 1987 transitions. [2021-11-07 02:17:58,262 INFO L78 Accepts]: Start accepts. Automaton has 1115 states and 1987 transitions. Word has length 67 [2021-11-07 02:17:58,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:17:58,263 INFO L470 AbstractCegarLoop]: Abstraction has 1115 states and 1987 transitions. [2021-11-07 02:17:58,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:17:58,263 INFO L276 IsEmpty]: Start isEmpty. Operand 1115 states and 1987 transitions. [2021-11-07 02:17:58,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 02:17:58,265 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:17:58,266 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:17:58,284 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 02:17:58,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:17:58,480 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 02:17:58,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:17:58,481 INFO L85 PathProgramCache]: Analyzing trace with hash 2067319886, now seen corresponding path program 1 times [2021-11-07 02:17:58,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:17:58,481 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [662342449] [2021-11-07 02:17:58,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:17:58,481 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:17:58,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:17:58,483 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:17:58,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 02:17:58,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:17:58,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:17:58,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:17:59,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:17:59,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:17:59,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:17:59,306 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:17:59,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [662342449] [2021-11-07 02:17:59,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [662342449] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:17:59,306 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:17:59,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:17:59,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177947752] [2021-11-07 02:17:59,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:17:59,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:17:59,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:17:59,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:17:59,308 INFO L87 Difference]: Start difference. First operand 1115 states and 1987 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:17:59,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:17:59,446 INFO L93 Difference]: Finished difference Result 2989 states and 5357 transitions. [2021-11-07 02:17:59,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:17:59,447 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-07 02:17:59,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:17:59,459 INFO L225 Difference]: With dead ends: 2989 [2021-11-07 02:17:59,459 INFO L226 Difference]: Without dead ends: 1970 [2021-11-07 02:17:59,463 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:17:59,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1970 states. [2021-11-07 02:17:59,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1970 to 1823. [2021-11-07 02:17:59,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1823 states, 1819 states have (on average 1.8020890599230346) internal successors, (3278), 1822 states have internal predecessors, (3278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:17:59,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1823 states to 1823 states and 3278 transitions. [2021-11-07 02:17:59,608 INFO L78 Accepts]: Start accepts. Automaton has 1823 states and 3278 transitions. Word has length 67 [2021-11-07 02:17:59,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:17:59,608 INFO L470 AbstractCegarLoop]: Abstraction has 1823 states and 3278 transitions. [2021-11-07 02:17:59,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:17:59,609 INFO L276 IsEmpty]: Start isEmpty. Operand 1823 states and 3278 transitions. [2021-11-07 02:17:59,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 02:17:59,618 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:17:59,618 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:17:59,636 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Ended with exit code 0 [2021-11-07 02:17:59,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:17:59,833 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 02:17:59,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:17:59,833 INFO L85 PathProgramCache]: Analyzing trace with hash 301738497, now seen corresponding path program 1 times [2021-11-07 02:17:59,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:17:59,834 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [24385565] [2021-11-07 02:17:59,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:17:59,834 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:17:59,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:17:59,834 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:17:59,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 02:18:00,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:18:00,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:18:00,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:18:00,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:18:00,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:18:00,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:18:00,668 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:18:00,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [24385565] [2021-11-07 02:18:00,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [24385565] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:18:00,669 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:18:00,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:18:00,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148251132] [2021-11-07 02:18:00,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:18:00,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:18:00,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:18:00,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:18:00,672 INFO L87 Difference]: Start difference. First operand 1823 states and 3278 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:00,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:18:00,898 INFO L93 Difference]: Finished difference Result 4849 states and 8749 transitions. [2021-11-07 02:18:00,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:18:00,899 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-07 02:18:00,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:18:00,920 INFO L225 Difference]: With dead ends: 4849 [2021-11-07 02:18:00,920 INFO L226 Difference]: Without dead ends: 3156 [2021-11-07 02:18:00,923 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:18:00,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3156 states. [2021-11-07 02:18:01,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3156 to 3009. [2021-11-07 02:18:01,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3009 states, 3005 states have (on average 1.8086522462562395) internal successors, (5435), 3008 states have internal predecessors, (5435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:01,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3009 states to 3009 states and 5435 transitions. [2021-11-07 02:18:01,155 INFO L78 Accepts]: Start accepts. Automaton has 3009 states and 5435 transitions. Word has length 68 [2021-11-07 02:18:01,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:18:01,156 INFO L470 AbstractCegarLoop]: Abstraction has 3009 states and 5435 transitions. [2021-11-07 02:18:01,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:01,156 INFO L276 IsEmpty]: Start isEmpty. Operand 3009 states and 5435 transitions. [2021-11-07 02:18:01,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 02:18:01,162 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:18:01,163 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:18:01,182 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 02:18:01,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:18:01,377 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 02:18:01,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:18:01,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1602755743, now seen corresponding path program 1 times [2021-11-07 02:18:01,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:18:01,378 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [914155079] [2021-11-07 02:18:01,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:18:01,378 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:18:01,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:18:01,380 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:18:01,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 02:18:01,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:18:01,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:18:01,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:18:02,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:18:02,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:18:02,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:18:02,251 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:18:02,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [914155079] [2021-11-07 02:18:02,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [914155079] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:18:02,251 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:18:02,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:18:02,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912242680] [2021-11-07 02:18:02,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:18:02,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:18:02,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:18:02,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:18:02,253 INFO L87 Difference]: Start difference. First operand 3009 states and 5435 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:02,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:18:02,653 INFO L93 Difference]: Finished difference Result 8123 states and 14703 transitions. [2021-11-07 02:18:02,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:18:02,653 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-07 02:18:02,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:18:02,688 INFO L225 Difference]: With dead ends: 8123 [2021-11-07 02:18:02,688 INFO L226 Difference]: Without dead ends: 5278 [2021-11-07 02:18:02,692 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:18:02,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5278 states. [2021-11-07 02:18:03,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5278 to 5131. [2021-11-07 02:18:03,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5131 states, 5127 states have (on average 1.810805539301736) internal successors, (9284), 5130 states have internal predecessors, (9284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:03,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5131 states to 5131 states and 9284 transitions. [2021-11-07 02:18:03,085 INFO L78 Accepts]: Start accepts. Automaton has 5131 states and 9284 transitions. Word has length 69 [2021-11-07 02:18:03,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:18:03,085 INFO L470 AbstractCegarLoop]: Abstraction has 5131 states and 9284 transitions. [2021-11-07 02:18:03,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:03,085 INFO L276 IsEmpty]: Start isEmpty. Operand 5131 states and 9284 transitions. [2021-11-07 02:18:03,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 02:18:03,093 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:18:03,093 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:18:03,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 02:18:03,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:18:03,308 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 02:18:03,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:18:03,308 INFO L85 PathProgramCache]: Analyzing trace with hash -813157981, now seen corresponding path program 1 times [2021-11-07 02:18:03,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:18:03,309 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [391058128] [2021-11-07 02:18:03,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:18:03,309 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:18:03,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:18:03,310 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:18:03,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 02:18:03,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:18:03,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:18:03,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:18:04,093 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 02:18:04,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:18:04,290 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 02:18:04,290 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:18:04,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [391058128] [2021-11-07 02:18:04,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [391058128] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:18:04,291 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:18:04,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:18:04,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465066438] [2021-11-07 02:18:04,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:18:04,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:18:04,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:18:04,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:18:04,292 INFO L87 Difference]: Start difference. First operand 5131 states and 9284 transitions. Second operand has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:07,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:18:07,400 INFO L93 Difference]: Finished difference Result 19176 states and 34738 transitions. [2021-11-07 02:18:07,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 02:18:07,403 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-07 02:18:07,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:18:07,478 INFO L225 Difference]: With dead ends: 19176 [2021-11-07 02:18:07,479 INFO L226 Difference]: Without dead ends: 14285 [2021-11-07 02:18:07,491 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:18:07,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14285 states. [2021-11-07 02:18:07,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14285 to 5081. [2021-11-07 02:18:07,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5081 states, 5077 states have (on average 1.7892456174906441) internal successors, (9084), 5080 states have internal predecessors, (9084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:07,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5081 states to 5081 states and 9084 transitions. [2021-11-07 02:18:07,989 INFO L78 Accepts]: Start accepts. Automaton has 5081 states and 9084 transitions. Word has length 70 [2021-11-07 02:18:07,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:18:07,990 INFO L470 AbstractCegarLoop]: Abstraction has 5081 states and 9084 transitions. [2021-11-07 02:18:07,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:07,990 INFO L276 IsEmpty]: Start isEmpty. Operand 5081 states and 9084 transitions. [2021-11-07 02:18:07,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 02:18:07,996 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:18:07,996 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:18:08,012 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 02:18:08,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:18:08,211 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 02:18:08,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:18:08,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1439768690, now seen corresponding path program 1 times [2021-11-07 02:18:08,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:18:08,212 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1462291106] [2021-11-07 02:18:08,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:18:08,213 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:18:08,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:18:08,214 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:18:08,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 02:18:08,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:18:08,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:18:08,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:18:09,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:18:09,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:18:09,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:18:09,250 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:18:09,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1462291106] [2021-11-07 02:18:09,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1462291106] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:18:09,250 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:18:09,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:18:09,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964375691] [2021-11-07 02:18:09,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:18:09,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:18:09,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:18:09,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:18:09,252 INFO L87 Difference]: Start difference. First operand 5081 states and 9084 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:09,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:18:09,724 INFO L93 Difference]: Finished difference Result 14800 states and 26504 transitions. [2021-11-07 02:18:09,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:18:09,724 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-07 02:18:09,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:18:09,749 INFO L225 Difference]: With dead ends: 14800 [2021-11-07 02:18:09,749 INFO L226 Difference]: Without dead ends: 9886 [2021-11-07 02:18:09,756 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:18:09,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9886 states. [2021-11-07 02:18:10,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9886 to 9739. [2021-11-07 02:18:10,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9739 states, 9735 states have (on average 1.789522342064715) internal successors, (17421), 9738 states have internal predecessors, (17421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:10,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9739 states to 9739 states and 17421 transitions. [2021-11-07 02:18:10,362 INFO L78 Accepts]: Start accepts. Automaton has 9739 states and 17421 transitions. Word has length 70 [2021-11-07 02:18:10,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:18:10,362 INFO L470 AbstractCegarLoop]: Abstraction has 9739 states and 17421 transitions. [2021-11-07 02:18:10,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:10,363 INFO L276 IsEmpty]: Start isEmpty. Operand 9739 states and 17421 transitions. [2021-11-07 02:18:10,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 02:18:10,370 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:18:10,370 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:18:10,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 02:18:10,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:18:10,586 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 02:18:10,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:18:10,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1313811294, now seen corresponding path program 1 times [2021-11-07 02:18:10,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:18:10,587 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [520938025] [2021-11-07 02:18:10,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:18:10,587 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:18:10,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:18:10,588 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:18:10,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 02:18:11,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:18:11,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:18:11,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:18:11,431 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:18:11,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:18:11,710 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:18:11,710 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:18:11,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [520938025] [2021-11-07 02:18:11,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [520938025] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:18:11,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [922587229] [2021-11-07 02:18:11,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:18:11,711 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:18:11,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:18:11,716 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:18:11,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-07 02:18:12,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:18:12,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:18:12,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:18:12,849 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:18:12,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:18:13,105 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:18:13,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [922587229] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:18:13,106 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:18:13,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [5, 5] total 16 [2021-11-07 02:18:13,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045562207] [2021-11-07 02:18:13,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 02:18:13,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:18:13,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 02:18:13,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-11-07 02:18:13,108 INFO L87 Difference]: Start difference. First operand 9739 states and 17421 transitions. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:18,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:18:18,335 INFO L93 Difference]: Finished difference Result 57176 states and 102848 transitions. [2021-11-07 02:18:18,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-07 02:18:18,335 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-07 02:18:18,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:18:18,499 INFO L225 Difference]: With dead ends: 57176 [2021-11-07 02:18:18,499 INFO L226 Difference]: Without dead ends: 57047 [2021-11-07 02:18:18,513 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=179, Invalid=813, Unknown=0, NotChecked=0, Total=992 [2021-11-07 02:18:18,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57047 states. [2021-11-07 02:18:20,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57047 to 19416. [2021-11-07 02:18:20,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19416 states, 19412 states have (on average 1.7899752730269936) internal successors, (34747), 19415 states have internal predecessors, (34747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:20,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19416 states to 19416 states and 34747 transitions. [2021-11-07 02:18:20,070 INFO L78 Accepts]: Start accepts. Automaton has 19416 states and 34747 transitions. Word has length 71 [2021-11-07 02:18:20,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:18:20,071 INFO L470 AbstractCegarLoop]: Abstraction has 19416 states and 34747 transitions. [2021-11-07 02:18:20,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:20,071 INFO L276 IsEmpty]: Start isEmpty. Operand 19416 states and 34747 transitions. [2021-11-07 02:18:20,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 02:18:20,084 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:18:20,084 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:18:20,114 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 02:18:20,303 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-07 02:18:20,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:18:20,500 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 02:18:20,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:18:20,500 INFO L85 PathProgramCache]: Analyzing trace with hash -217605030, now seen corresponding path program 1 times [2021-11-07 02:18:20,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:18:20,501 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [92380667] [2021-11-07 02:18:20,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:18:20,501 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:18:20,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:18:20,502 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:18:20,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 02:18:21,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:18:21,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:18:21,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:18:21,484 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:18:21,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:18:21,713 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:18:21,713 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:18:21,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [92380667] [2021-11-07 02:18:21,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [92380667] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:18:21,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2081726954] [2021-11-07 02:18:21,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:18:21,714 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:18:21,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:18:21,715 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:18:21,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-07 02:18:22,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:18:22,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 02:18:22,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:18:22,806 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:18:22,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:18:23,026 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:18:23,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2081726954] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:18:23,026 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:18:23,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 11 [2021-11-07 02:18:23,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402987095] [2021-11-07 02:18:23,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:18:23,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:18:23,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:18:23,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-07 02:18:23,028 INFO L87 Difference]: Start difference. First operand 19416 states and 34747 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:26,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:18:26,065 INFO L93 Difference]: Finished difference Result 19682 states and 35180 transitions. [2021-11-07 02:18:26,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:18:26,065 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-07 02:18:26,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:18:26,105 INFO L225 Difference]: With dead ends: 19682 [2021-11-07 02:18:26,105 INFO L226 Difference]: Without dead ends: 19458 [2021-11-07 02:18:26,112 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 275 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-11-07 02:18:26,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19458 states. [2021-11-07 02:18:27,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19458 to 19410. [2021-11-07 02:18:27,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19410 states, 19406 states have (on average 1.7898588065546739) internal successors, (34734), 19409 states have internal predecessors, (34734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:27,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19410 states to 19410 states and 34734 transitions. [2021-11-07 02:18:27,485 INFO L78 Accepts]: Start accepts. Automaton has 19410 states and 34734 transitions. Word has length 72 [2021-11-07 02:18:27,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:18:27,485 INFO L470 AbstractCegarLoop]: Abstraction has 19410 states and 34734 transitions. [2021-11-07 02:18:27,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:27,486 INFO L276 IsEmpty]: Start isEmpty. Operand 19410 states and 34734 transitions. [2021-11-07 02:18:27,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 02:18:27,497 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:18:27,497 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:18:27,502 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-11-07 02:18:27,712 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 02:18:27,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:18:27,902 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 02:18:27,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:18:27,902 INFO L85 PathProgramCache]: Analyzing trace with hash -288007535, now seen corresponding path program 1 times [2021-11-07 02:18:27,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:18:27,903 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [838851408] [2021-11-07 02:18:27,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:18:27,903 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:18:27,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:18:27,904 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:18:27,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 02:18:28,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:18:28,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:18:28,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:18:28,777 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:18:28,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:18:28,964 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:18:28,964 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:18:28,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [838851408] [2021-11-07 02:18:28,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [838851408] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:18:28,964 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:18:28,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 02:18:28,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270016113] [2021-11-07 02:18:28,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:18:28,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:18:28,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:18:28,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:18:28,966 INFO L87 Difference]: Start difference. First operand 19410 states and 34734 transitions. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:30,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:18:30,001 INFO L93 Difference]: Finished difference Result 37918 states and 68072 transitions. [2021-11-07 02:18:30,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:18:30,001 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-07 02:18:30,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:18:30,025 INFO L225 Difference]: With dead ends: 37918 [2021-11-07 02:18:30,025 INFO L226 Difference]: Without dead ends: 18751 [2021-11-07 02:18:30,047 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:18:30,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18751 states. [2021-11-07 02:18:30,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18751 to 9737. [2021-11-07 02:18:30,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9737 states, 9733 states have (on average 1.788965375526559) internal successors, (17412), 9736 states have internal predecessors, (17412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:30,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9737 states to 9737 states and 17412 transitions. [2021-11-07 02:18:30,916 INFO L78 Accepts]: Start accepts. Automaton has 9737 states and 17412 transitions. Word has length 72 [2021-11-07 02:18:30,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:18:30,916 INFO L470 AbstractCegarLoop]: Abstraction has 9737 states and 17412 transitions. [2021-11-07 02:18:30,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:30,917 INFO L276 IsEmpty]: Start isEmpty. Operand 9737 states and 17412 transitions. [2021-11-07 02:18:30,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 02:18:30,926 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:18:30,927 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:18:30,945 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-07 02:18:31,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:18:31,145 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 02:18:31,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:18:31,146 INFO L85 PathProgramCache]: Analyzing trace with hash 819887912, now seen corresponding path program 1 times [2021-11-07 02:18:31,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:18:31,146 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2143828191] [2021-11-07 02:18:31,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:18:31,147 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:18:31,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:18:31,147 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:18:31,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-07 02:18:31,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:18:31,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:18:31,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:18:32,100 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:18:32,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:18:32,289 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:18:32,289 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:18:32,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2143828191] [2021-11-07 02:18:32,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2143828191] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:18:32,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [404295023] [2021-11-07 02:18:32,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:18:32,290 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:18:32,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:18:32,291 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:18:32,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-11-07 02:18:33,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:18:33,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-07 02:18:33,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:18:33,653 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:18:33,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:18:34,003 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:18:34,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [404295023] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:18:34,004 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:18:34,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [5, 5] total 22 [2021-11-07 02:18:34,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286345430] [2021-11-07 02:18:34,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 02:18:34,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:18:34,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 02:18:34,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2021-11-07 02:18:34,009 INFO L87 Difference]: Start difference. First operand 9737 states and 17412 transitions. Second operand has 16 states, 16 states have (on average 7.75) internal successors, (124), 16 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:40,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:18:40,716 INFO L93 Difference]: Finished difference Result 11078 states and 19457 transitions. [2021-11-07 02:18:40,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-07 02:18:40,717 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 7.75) internal successors, (124), 16 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-07 02:18:40,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:18:40,730 INFO L225 Difference]: With dead ends: 11078 [2021-11-07 02:18:40,731 INFO L226 Difference]: Without dead ends: 10970 [2021-11-07 02:18:40,734 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 273 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1056, Invalid=2976, Unknown=0, NotChecked=0, Total=4032 [2021-11-07 02:18:40,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10970 states. [2021-11-07 02:18:41,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10970 to 9878. [2021-11-07 02:18:41,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9878 states, 9874 states have (on average 1.7861049220174194) internal successors, (17636), 9877 states have internal predecessors, (17636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:41,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9878 states to 9878 states and 17636 transitions. [2021-11-07 02:18:41,308 INFO L78 Accepts]: Start accepts. Automaton has 9878 states and 17636 transitions. Word has length 74 [2021-11-07 02:18:41,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:18:41,308 INFO L470 AbstractCegarLoop]: Abstraction has 9878 states and 17636 transitions. [2021-11-07 02:18:41,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.75) internal successors, (124), 16 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:41,309 INFO L276 IsEmpty]: Start isEmpty. Operand 9878 states and 17636 transitions. [2021-11-07 02:18:41,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 02:18:41,316 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:18:41,316 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:18:41,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-07 02:18:41,526 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2021-11-07 02:18:41,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:18:41,720 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 02:18:41,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:18:41,720 INFO L85 PathProgramCache]: Analyzing trace with hash 577407, now seen corresponding path program 1 times [2021-11-07 02:18:41,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:18:41,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [668093239] [2021-11-07 02:18:41,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:18:41,721 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:18:41,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:18:41,722 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:18:41,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-07 02:18:42,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:18:42,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:18:42,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:18:42,737 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:18:42,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:18:42,922 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:18:42,922 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:18:42,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [668093239] [2021-11-07 02:18:42,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [668093239] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:18:42,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1475032027] [2021-11-07 02:18:42,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:18:42,922 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:18:42,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:18:42,924 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:18:42,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-07 02:18:44,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:18:44,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-07 02:18:44,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:18:44,854 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:18:44,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:18:45,327 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:18:45,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1475032027] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:18:45,327 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:18:45,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [5, 5] total 24 [2021-11-07 02:18:45,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848232072] [2021-11-07 02:18:45,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-07 02:18:45,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:18:45,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-07 02:18:45,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-11-07 02:18:45,329 INFO L87 Difference]: Start difference. First operand 9878 states and 17636 transitions. Second operand has 18 states, 18 states have (on average 7.5) internal successors, (135), 17 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:19:10,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:19:10,906 INFO L93 Difference]: Finished difference Result 31377 states and 55571 transitions. [2021-11-07 02:19:10,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-07 02:19:10,907 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 7.5) internal successors, (135), 17 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-07 02:19:10,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:19:10,949 INFO L225 Difference]: With dead ends: 31377 [2021-11-07 02:19:10,949 INFO L226 Difference]: Without dead ends: 31190 [2021-11-07 02:19:10,957 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=586, Invalid=2066, Unknown=0, NotChecked=0, Total=2652 [2021-11-07 02:19:10,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31190 states. [2021-11-07 02:19:12,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31190 to 19938. [2021-11-07 02:19:12,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19938 states, 19934 states have (on average 1.7844888130831744) internal successors, (35572), 19937 states have internal predecessors, (35572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:19:12,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19938 states to 19938 states and 35572 transitions. [2021-11-07 02:19:12,302 INFO L78 Accepts]: Start accepts. Automaton has 19938 states and 35572 transitions. Word has length 75 [2021-11-07 02:19:12,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:19:12,302 INFO L470 AbstractCegarLoop]: Abstraction has 19938 states and 35572 transitions. [2021-11-07 02:19:12,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 7.5) internal successors, (135), 17 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:19:12,303 INFO L276 IsEmpty]: Start isEmpty. Operand 19938 states and 35572 transitions. [2021-11-07 02:19:12,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 02:19:12,312 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:19:12,312 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:19:12,343 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2021-11-07 02:19:12,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-11-07 02:19:12,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:19:12,729 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 02:19:12,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:19:12,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1840292907, now seen corresponding path program 1 times [2021-11-07 02:19:12,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:19:12,729 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1602440416] [2021-11-07 02:19:12,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:19:12,730 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:19:12,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:19:12,730 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:19:12,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-07 02:19:13,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:19:13,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:19:13,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:19:13,780 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:19:13,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:19:13,976 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:19:13,977 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:19:13,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1602440416] [2021-11-07 02:19:13,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1602440416] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:19:13,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1025005044] [2021-11-07 02:19:13,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:19:13,977 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:19:13,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:19:13,983 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:19:13,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-07 02:19:15,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:19:15,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-07 02:19:15,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:19:15,442 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:19:15,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:19:15,612 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:19:15,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1025005044] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:19:15,613 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:19:15,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5] total 14 [2021-11-07 02:19:15,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819358886] [2021-11-07 02:19:15,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:19:15,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:19:15,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:19:15,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-11-07 02:19:15,614 INFO L87 Difference]: Start difference. First operand 19938 states and 35572 transitions. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:19:16,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:19:16,929 INFO L93 Difference]: Finished difference Result 20501 states and 36469 transitions. [2021-11-07 02:19:16,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 02:19:16,929 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-07 02:19:16,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:19:16,954 INFO L225 Difference]: With dead ends: 20501 [2021-11-07 02:19:16,954 INFO L226 Difference]: Without dead ends: 19879 [2021-11-07 02:19:16,959 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2021-11-07 02:19:16,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19879 states. [2021-11-07 02:19:18,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19879 to 19847. [2021-11-07 02:19:18,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19847 states, 19843 states have (on average 1.784457995262813) internal successors, (35409), 19846 states have internal predecessors, (35409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:19:18,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19847 states to 19847 states and 35409 transitions. [2021-11-07 02:19:18,230 INFO L78 Accepts]: Start accepts. Automaton has 19847 states and 35409 transitions. Word has length 75 [2021-11-07 02:19:18,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:19:18,230 INFO L470 AbstractCegarLoop]: Abstraction has 19847 states and 35409 transitions. [2021-11-07 02:19:18,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:19:18,230 INFO L276 IsEmpty]: Start isEmpty. Operand 19847 states and 35409 transitions. [2021-11-07 02:19:18,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 02:19:18,240 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:19:18,240 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:19:18,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2021-11-07 02:19:18,455 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2021-11-07 02:19:18,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:19:18,641 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 02:19:18,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:19:18,642 INFO L85 PathProgramCache]: Analyzing trace with hash 19119461, now seen corresponding path program 1 times [2021-11-07 02:19:18,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:19:18,642 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [438457778] [2021-11-07 02:19:18,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:19:18,642 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:19:18,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:19:18,643 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:19:18,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-07 02:19:19,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:19:19,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:19:19,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:19:19,769 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:19:19,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:19:19,992 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:19:19,993 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:19:19,993 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [438457778] [2021-11-07 02:19:19,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [438457778] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:19:19,993 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1623159969] [2021-11-07 02:19:19,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:19:19,993 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:19:19,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:19:19,994 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:19:20,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-11-07 02:19:21,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:19:21,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-07 02:19:21,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:19:22,017 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:19:22,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:19:22,413 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:19:22,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1623159969] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:19:22,414 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:19:22,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [5, 5] total 24 [2021-11-07 02:19:22,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983948198] [2021-11-07 02:19:22,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-07 02:19:22,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:19:22,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-07 02:19:22,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-11-07 02:19:22,415 INFO L87 Difference]: Start difference. First operand 19847 states and 35409 transitions. Second operand has 18 states, 18 states have (on average 7.611111111111111) internal successors, (137), 17 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:19:43,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:19:43,176 INFO L93 Difference]: Finished difference Result 52088 states and 92278 transitions. [2021-11-07 02:19:43,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-07 02:19:43,177 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 7.611111111111111) internal successors, (137), 17 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-07 02:19:43,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:19:43,246 INFO L225 Difference]: With dead ends: 52088 [2021-11-07 02:19:43,246 INFO L226 Difference]: Without dead ends: 51728 [2021-11-07 02:19:43,255 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=586, Invalid=2066, Unknown=0, NotChecked=0, Total=2652 [2021-11-07 02:19:43,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51728 states. [2021-11-07 02:19:45,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51728 to 39542. [2021-11-07 02:19:45,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39542 states, 39538 states have (on average 1.7847387323587436) internal successors, (70565), 39541 states have internal predecessors, (70565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:19:45,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39542 states to 39542 states and 70565 transitions. [2021-11-07 02:19:45,871 INFO L78 Accepts]: Start accepts. Automaton has 39542 states and 70565 transitions. Word has length 76 [2021-11-07 02:19:45,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:19:45,872 INFO L470 AbstractCegarLoop]: Abstraction has 39542 states and 70565 transitions. [2021-11-07 02:19:45,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 7.611111111111111) internal successors, (137), 17 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:19:45,872 INFO L276 IsEmpty]: Start isEmpty. Operand 39542 states and 70565 transitions. [2021-11-07 02:19:45,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 02:19:45,890 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:19:45,890 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:19:45,895 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2021-11-07 02:19:46,102 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-07 02:19:46,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:19:46,291 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 02:19:46,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:19:46,291 INFO L85 PathProgramCache]: Analyzing trace with hash 19179043, now seen corresponding path program 1 times [2021-11-07 02:19:46,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:19:46,292 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [232357405] [2021-11-07 02:19:46,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:19:46,292 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:19:46,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:19:46,294 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:19:46,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-07 02:19:47,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:19:47,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:19:47,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:19:47,540 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:19:47,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:19:47,780 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:19:47,780 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:19:47,780 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [232357405] [2021-11-07 02:19:47,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [232357405] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:19:47,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1950719251] [2021-11-07 02:19:47,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:19:47,781 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:19:47,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:19:47,782 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:19:47,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-11-07 02:19:49,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:19:49,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:19:49,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:19:49,488 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:19:49,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:19:49,651 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:19:49,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1950719251] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:19:49,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982596613] [2021-11-07 02:19:49,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:19:49,651 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:19:49,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:19:49,652 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:19:49,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-07 02:19:50,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:19:50,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:19:50,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:19:51,043 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:19:51,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:19:51,206 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:19:51,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982596613] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:19:51,206 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 02:19:51,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2021-11-07 02:19:51,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018645562] [2021-11-07 02:19:51,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:19:51,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:19:51,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:19:51,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:19:51,207 INFO L87 Difference]: Start difference. First operand 39542 states and 70565 transitions. Second operand has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:19:55,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:19:55,359 INFO L93 Difference]: Finished difference Result 64064 states and 113326 transitions. [2021-11-07 02:19:55,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 02:19:55,359 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 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 76 [2021-11-07 02:19:55,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:19:55,441 INFO L225 Difference]: With dead ends: 64064 [2021-11-07 02:19:55,441 INFO L226 Difference]: Without dead ends: 62550 [2021-11-07 02:19:55,451 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 444 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:19:55,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62550 states. [2021-11-07 02:19:59,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62550 to 58842. [2021-11-07 02:19:59,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58842 states, 58838 states have (on average 1.781892654407016) internal successors, (104843), 58841 states have internal predecessors, (104843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:19:59,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58842 states to 58842 states and 104843 transitions. [2021-11-07 02:19:59,510 INFO L78 Accepts]: Start accepts. Automaton has 58842 states and 104843 transitions. Word has length 76 [2021-11-07 02:19:59,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:19:59,510 INFO L470 AbstractCegarLoop]: Abstraction has 58842 states and 104843 transitions. [2021-11-07 02:19:59,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:19:59,511 INFO L276 IsEmpty]: Start isEmpty. Operand 58842 states and 104843 transitions. [2021-11-07 02:19:59,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 02:19:59,530 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:19:59,530 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:19:59,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-07 02:19:59,736 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (30)] Ended with exit code 0 [2021-11-07 02:19:59,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-07 02:20:00,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:20:00,131 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 02:20:00,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:20:00,132 INFO L85 PathProgramCache]: Analyzing trace with hash -878298797, now seen corresponding path program 1 times [2021-11-07 02:20:00,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:20:00,132 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2084185889] [2021-11-07 02:20:00,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:20:00,132 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:20:00,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:20:00,134 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:20:00,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-07 02:20:01,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:20:01,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:20:01,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:20:01,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:20:01,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:20:01,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:20:01,554 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:20:01,554 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2084185889] [2021-11-07 02:20:01,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2084185889] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:20:01,554 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:20:01,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:20:01,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914943620] [2021-11-07 02:20:01,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:20:01,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:20:01,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:20:01,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:20:01,556 INFO L87 Difference]: Start difference. First operand 58842 states and 104843 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:08,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:20:08,110 INFO L93 Difference]: Finished difference Result 152674 states and 273129 transitions. [2021-11-07 02:20:08,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:20:08,110 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-07 02:20:08,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:20:08,270 INFO L225 Difference]: With dead ends: 152674 [2021-11-07 02:20:08,270 INFO L226 Difference]: Without dead ends: 101860 [2021-11-07 02:20:08,492 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:20:08,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101860 states. [2021-11-07 02:20:15,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101860 to 100346. [2021-11-07 02:20:15,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100346 states, 100342 states have (on average 1.7880747842379063) internal successors, (179419), 100345 states have internal predecessors, (179419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:16,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100346 states to 100346 states and 179419 transitions. [2021-11-07 02:20:16,288 INFO L78 Accepts]: Start accepts. Automaton has 100346 states and 179419 transitions. Word has length 76 [2021-11-07 02:20:16,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:20:16,288 INFO L470 AbstractCegarLoop]: Abstraction has 100346 states and 179419 transitions. [2021-11-07 02:20:16,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:16,288 INFO L276 IsEmpty]: Start isEmpty. Operand 100346 states and 179419 transitions. [2021-11-07 02:20:16,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 02:20:16,310 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:20:16,310 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:20:16,324 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-11-07 02:20:16,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:20:16,511 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 02:20:16,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:20:16,511 INFO L85 PathProgramCache]: Analyzing trace with hash -331956755, now seen corresponding path program 1 times [2021-11-07 02:20:16,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:20:16,511 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1566402476] [2021-11-07 02:20:16,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:20:16,512 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:20:16,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:20:16,512 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:20:16,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3b919c3-c2fb-4c37-8ab3-e38c0bb62c06/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-07 02:20:17,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:20:17,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:20:17,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:20:17,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:20:17,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:20:17,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:20:17,987 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:20:17,988 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1566402476] [2021-11-07 02:20:17,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1566402476] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:20:17,988 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:20:17,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:20:17,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626579650] [2021-11-07 02:20:17,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:20:17,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:20:17,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:20:17,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:20:17,989 INFO L87 Difference]: Start difference. First operand 100346 states and 179419 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)